Updated on 2024/06/18

写真a

 
MACHIDA, Hiroshi
 
Organization
Institutes of Innovation for Future Society Associate professor
Graduate School
Graduate School of Engineering
Title
Associate professor
Contact information
メールアドレス

Degree 1

  1. 博士(工学) ( 2009.3   東北大学 ) 

Research Interests 1

  1. supercritical fluid

Research Areas 2

  1. Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Transport phenomena and unit operations  / Chemical engneering

  2. Nanotechnology/Materials / Energy chemistry

Current Research Project and SDGs 2

  1. Energy-saving CO2 Capture Process with Phase Separation Solvent

  2. バイオエタノールの省エネルギー濃縮・脱水技術の開発

Research History 2

  1. Nagoya University   Assistant Professor

    2010.9 - 2022.3

  2. Research Institute of Innovative Technology for the Earth

    2009.4 - 2010.8

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    Country:Japan

Education 2

  1. Tohoku University   Graduate School, Division of Engineering   Department of Chemical Engineering

    - 2009.3

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    Country: Japan

  2. Tohoku University   Faculty of Engineering

    2000.4 - 2004.3

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    Country: Japan

Professional Memberships 2

  1. 化学工学会

  2. The Society of Separation Process Engneers, Japan

Committee Memberships 5

  1. 化学工学会   東海支部未来の化学工学を創る会代表  

    2021.4   

  2. 化学工学会   戦略推進センターCCUS研究会幹事  

    2020.10   

  3. 化学工学会   超臨界流体部会幹事  

    2017.4   

  4. 分離技術会   東海地区幹事  

    2015.4   

  5. セルロース学会第19回年次大会   実行委員  

    2012.4 - 2012.7   

Awards 4

  1. 特定課題研究奨励金カーボンニュートラル研究

    2022.3   永井科学技術財団   超親水性充填物の開発による CO2分離回収の革新的低コスト化

  2. 部会CT賞

    2021.3   化学工学会  

  3. 第15回わかしゃち奨励賞応用研究部門最優秀賞

    2020.12   愛知県   水素による省エネルギー温室効果ガス回収技術の開発

  4. 教育奨励賞

    2013.3   化学工学会  

 

Papers 74

  1. Environmental-friendly extraction of di(2-ethylhexyl) phthalate from poly (vinyl chloride) using liquefied dimethyl ether

    Wang, T; Kanda, H; Kusumi, K; Mei, L; Zhang, LJ; Machida, H; Norinaga, K; Yamamoto, T; Sekikawa, H; Yasui, K; Zhu, L

    WASTE MANAGEMENT   Vol. 183   page: 21 - 31   2024.6

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Waste Management  

    Poly(vinyl chloride) (PVC) is one of the most widely used plastics. However, a major challenge in recycling PVC is that there is no economical method to separate and remove its toxic phthalate plasticizers. This research made a breakthrough by extracting PVC with liquefied dimethyl ether (DME) and successfully separating the plasticizer components. Nearly all (97.1 %) of the di(2-ethylhexyl) phthalate plasticizer was extracted within 30 min by passing liquefied DME (285 g) through PVC at 25 °C. The compatibility of PVC with organic solvents, including liquefied DME, was derived theoretically from their Hansen solubility parameters (HSP), and actual dissolution experiments were conducted to determine the optimal PVC solvents. A liquefied DME mixture was used to dissolve PVC, and the extract was diluted with ethanol to precipitate the dissolved PVC. We demonstrated that liquefied DME is a promising method for producing high quality recycled products and that the process retains the fundamental properties of plasticizers and PVC without inducing degradation or depolymerization. Because of its low boiling point, DME can be easily separated from the solute after extraction, allowing for efficient reuse of the solvent, extracted plasticizer, and PVC. DME does not require heat and produces little harmful wastewater, which significantly reduces the energy consumption of the plasticizer additive separation process.

    DOI: 10.1016/j.wasman.2024.04.050

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  2. Energy optimization of a non-aqueous solvent CO<sub>2</sub> absorption system with pressure swing regeneration

    Chairunnisaa; Zhou, YX; Wu, YT; You, C; Thu, K; Miyazaki, T; Uehara, Y; Machida, H; Norinaga, K

    INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL   Vol. 135   2024.6

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:International Journal of Greenhouse Gas Control  

    This study focuses on optimizing the energy requirement in the post-combustion CO2 capture system using pressure swing regeneration through a model-based design (MBD). The simulation results highlight the significant impact of CO2 recovery, inlet gas and liquid flow rate, and CO2 concentration in the flue gas on the overall energy demand of the system. Moreover, an investigation into the de-sublimation chamber was undertaken, revealing a relationship between dry ice formation and the heat transfer between the LNG stream and CO2 in the heat exchanger. The parametric analysis study reveals that the sensible heat of the lean solvent is significantly influenced by the CO2 concentration in the liquid, consequently affecting the overall system energy. According to the results, the utilization of cold energy from LNG could save 80 % of the total energy requirement. The optimization results found the best working condition, which consumes energy of 0.190 GJ/ton CO2, 31 % lower than the basic scenario.

    DOI: 10.1016/j.ijggc.2024.104154

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  3. High-Throughput CO<sub>2</sub> Solubility Measurement in Miscible and Liquid-Liquid Phase Separation Types of Amine Solvent Using Headspace Gas Chromatography

    Tran, KVB; Yanase, K; Rao, TU; Hirayama, M; Norinaga, K; Machida, H

    INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH   Vol. 63 ( 13 ) page: 5823 - 5832   2024.3

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Industrial and Engineering Chemistry Research  

    CO2 solubility is one of the key factors in evaluating not only the efficiency of the absorbent but also the energy consumption of the CO2 capture process from flue gas. In this study, a system namely headspace gas chromatography (HS-GC), which is a combination of gas chromatography (GC-3200, GL Sciences) and a headspace autosampler (Turbomatrix HS16, PerkinElmer), was developed to measure the CO2 solubility of amine solutions. The equilibrium time and calibration curve of this system were checked and compared with those of the literature data. The developed system showed high reproducibility with reference CO2 solubility data of benchmark amine solutions. Distinct from conventional measurement methods of CO2 solubility, high-throughput CO2 solubility measurement by HS-GC shows its advantages such as a small amount sample requirement, rapid achievement of equilibration time, automation of sample exchange, and high reproducibility, which is superior in the amine solvent screening phase. Moreover, this system can evaluate new types of CO2 capture solvents, including the phase separation solvent. By acquiring continuous data, the inflection point in the solubility curve indicated by phase separation was observed. The absorption heat estimated from those CO2 solubility curves measured by this system also agrees well with the experimental data.

    DOI: 10.1021/acs.iecr.3c03314

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  4. Design and optimization of the flexible poly- generation process for methanol and formic acid from CO<sub>2 </sub>hydrogenation under uncertain product prices

    Li, Q; Machida, H; Ren, XS; Feng, ZM; Norinaga, K

    INTERNATIONAL JOURNAL OF HYDROGEN ENERGY   Vol. 54   page: 635 - 651   2024.2

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:International Journal of Hydrogen Energy  

    During the design of the carbon capture and hydrogen storage process, a static CO2 hydrogenation poly-generation process for methanol and formic acid synthesis was developed, thereby reducing recycling flow and feedstock losses in the single methanol synthesis process and increasing product diversity. Additionally, a novel flexible poly-generation process was proposed as the product prices fluctuated with the market environment throughout the plant's life cycle. For the static poly-generation process, a mixed integer nonlinear programming model was established, followed by the Mesh Adaptive Direct Search algorithm to determine the optimal parameter design. For flexible processes, with the unscented transform tool, a two-stage optimization strategy is proposed for obtaining optimal design and operating parameters that are computationally tractable. With an input CO2 flow rate of 200 kmol/h, the results show (1) the static process with an optimal Return On Investment of 13.05%, a fixed investment cost of $ 34.14 × 106, and an annual net profit of 4.46 × 106 $/year; and (2) the flexible process, in which the flexibility indices of the methanol and formic acid production units are 1.088 and 1.194, respectively, resulting the fixed investment cost increase to $ 39.19 × 106, an increase of 14.79%. Accordingly, the annual net profit increased by 8.97% to 4.86 × 106 $/year, while the Return On Investment decreased by 4.67%–12.44%. For investment decision-makers, the flexible poly-generation process can achieve higher profits and reduce potential market risks when they have adequate financing.

    DOI: 10.1016/j.ijhydene.2023.01.205

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  5. CO<inf>2</inf> methanation over low-loaded Ni-M, Ru-M (M = Co, Mn) catalysts supported on CeO<inf>2</inf> and SiC

    Wasnik C.G., Nakamura M., Shimada T., Machida H., Norinaga K.

    Carbon Resources Conversion     2024

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Carbon Resources Conversion  

    The concentration of the major greenhouse gas CO2 is rapidly increasing in the atmosphere, leading to global warming and a range of environmental issues. An efficient circulation and utilization of CO2 is critical in the current environmental context. Methanation, an exothermic process, emerges as a critical strategy for effective CO2 utilization. On this front, there is a significant demand for rational design of catalysts that maintain high activity and methane selectivity over a wide temperature range (250–550 °C). The catalyst that can promise a consistent reaction even at 500 °C under an atmospheric pressure is thus obliged. The present study investigated bimetallic catalysts with SiC, which is known for its exceptional thermal conductivity, and CeO2, which is characterized by its CO₂ affinity, as base materials. We incorporated Ni-M and Ru-M (M = Co and Mn) as the active metals, each loaded at 2 %. Impressively, with merely 20 mg, the Ni-Co/SiC catalyst achieved a CO2 conversion rate of 77 % and CH₄ selectivity of 88 % at 500 °C, in a fixed-bed tubular reactor system with conditions of H2/CO2 = 4, a total flow rate of 70 ml min−1, and a steady GHSV of 12,000 h−1. Moreover, 2Ni-2Co/CeO2 catalyst demonstrated exceptional performance with a 76 % conversion of CO2 and a 83 % selectivity for CH4, all under identical conditions. The catalyst's durability was confirmed by a subsequent 40-hour stability test, which showed only a 3–5 % degradation. The developed catalysts were comprehensively characterized by BET/BJH, CO pulse chemisorption, H2-TPR, HAADF-STEM-EDS, SEM-EDS and XRD etc. to unveil their physicochemical and surface traits. It was found that Co and Mn, when integrated, effectively restrained the agglomeration of Ni and Ru particles, ensuring optimal metal dispersion on the support. In conclusion, our synthesized bimetallic catalysts shown a sustained catalytic capability, even in the high-temperature environment.

    DOI: 10.1016/j.crcon.2024.100241

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  6. CFD simulation of CO2 methanation through the Sabatier reaction in a shell-and-tube reactor incorporating phase change on the shell side

    Fukumoto, K; Zhang, W; Mizoguchi, R; Lin, YX; Choi, C; Machida, H; Norinaga, K

    FUEL   Vol. 349   2023.10

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Fuel  

    This paper reports a computational fluid dynamics simulation of carbon dioxide (CO2) methanation via the Sabatier process in a shell-and-tube reactor, incorporating a water phase change simulation on the shell side using the volume of fluid (VOF) method. The essential heat removal factors and their mechanisms, such as the catalyst size, bed porosity, thermal conductivity, coolant flow rate, and coolant boiling, were primarily investigated. The computational code was a newly developed in-house version of ChtMultiRegionFOAM based on OpenFOAM v2006. This code can simulate catalyst-gas heat transfer, which is called the two-temperature model. The code was extended to new methanation and phase-change models based on the VOF method. The computational code was first validated using existing experimental data. After sufficient accuracy was confirmed, several parametric studies were conducted. Catalyst heat conductivity was the most influential factor among the catalyst-related parameters. The flow rate of the oil coolant significantly affected the cooling performance. Finally, the use of boiling water significantly reduced the coolant flow rate. Moreover, the cooling performance remained unchanged until the total heat release rate from the gas exceeded the total latent heat of the water.

    DOI: 10.1016/j.fuel.2023.128126

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  7. Polycyclic aromatic hydrocarbons (PAHs) and soot formations under different gasifying agents: Detailed chemical kinetic analysis of a two-stage entrained flow coal gasifier

    Li, TL; Choi, C; Fukomoto, K; Machida, H; Norinaga, K

    FUEL   Vol. 343   2023.7

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Fuel  

    The injection of CO2 with coal into coal gasifier is a promising approach to achieve CO2 recirculation. Predicting the formation and evolution of polycyclic aromatic hydrocarbons (PAHs) and soot during coal gasification is particularly important as their presence poses challenges to the gasifier operation and environment. However, the effect of CO2 injection on their formation must be elucidated in more detail to optimize the gasifier design. This work investigates PAHs and soot formations in gas-phase reactions under different gasifying agents (Air, O2/CO2, O2/H2O) in a two-stage entrained flow coal gasifier using a detailed chemical kinetic model (DCKM). Under the O2/CO2– and O2/H2O-blown conditions, aromatics reforming was progressed whereas the yields of tar and soot were effectively suppressed. The benzene was observed as the most abundant PAHs species, followed by naphthalene and acenaphthalene. Regarding the relative oxygen concentration, the conversion behavior of aromatics was significantly influenced in the O2/CO2-blown condition, while the somewhat effect was found in the O2/H2O-blown condition. Tar yield peaked at 50% relative oxygen concentration in the O2/CO2-blown condition. The present finding may have practical significance in the O2/CO2-blown gasifier to facilitate CO2 recirculation for the oxy-fuel IGCC system.

    DOI: 10.1016/j.fuel.2023.127876

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  8. CFD simulation of CVD reactors in the CH3SiCl3(MTS)/H2 system using a two-step MTS decomposition and one-step SiC growth models

    Ogawa, T; Fukumoto, K; Machida, H; Norinaga, K

    HELIYON   Vol. 9 ( 4 )   2023.4

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Heliyon  

    In this study, we report on a computational fluid dynamics (CFD) simulation of the chemical vapor deposition reactor of silicon carbide (SiC) in the methyltrichlorosilane (MTS, CH3SiCl3)/H2 system. The formation of SiC thin film is controlled by various process parameters, such as temperature and pressure. In this study, we propose a reaction mechanism of MTS decomposition to SiC growth on a substrate surface for CVD reactors in the CH3SiCl3(MTS)/H2 system. The reaction mechanism has two gas-phase pyrolysis reactions and one SiC film formation reaction. However, we individually build and validate MTS decomposition and SiC growth models to reduce uncertainty. An in-house version of reactingFoam, a reactive flow solver within OpenFOAM v2006, was used as the simulation tool. Our model accurately reproduced MTS decomposition for T = 1100–1350 K and [H2]/[MTS] = 2.65–14 at p = 101,325 Pa. Then, the MTS decomposition model was coupled with the SiC growth model, and the coupled model was applied to the SiC deposition data. The model could reproduce multiple datasets through validation studies.

    DOI: 10.1016/j.heliyon.2023.e15061

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  9. Lattice Boltzmann study on the effect of hierarchical pore structure on fluid flow and coke formation characteristics in open-cell foam for dry reforming of methane

    Lin, YX; Yang, C; Zhang, W; Machida, H; Norinaga, K

    CHEMICAL ENGINEERING SCIENCE   Vol. 268   2023.3

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Chemical Engineering Science  

    Dry reforming of methane (DRM) is one of the feasible strategies for carbon capture and utilization. However, the DRM process has a high tendency toward carbon deposition, which is restricted to industrial applications. In order to further improve coke formation resistance, open-cell foam with hierarchical pore structure was investigated. An artificial algorithm was adopted to construct a hierarchical pore structure in open-cell foam. Based on a 3-D lattice Boltzmann model, this work explored the effect of two hierarchical pore structure parameters on the fluid flow and coke formation characteristics in open-cell foam, which are hierarchical pore volume ratio (V2/V1) and hierarchical pore size ratio (d2/d1). The results indicated that increasing V2/V1 and d2/d1 can significantly promote permeability. Under the restriction ofV2/V1 = 4, from d2/d1 = 1 to 4, the coke formation rate decreases by approximately 57.49 %. These findings provide a theoretical basis and technical guidance for designing and developing open-cell foam reactors.

    DOI: 10.1016/j.ces.2022.118380

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  10. Estimation of effective thermal conductivity in open-cell foam with hierarchical pore structure using lattice Boltzmann method

    Lin, YX; Yang, C; Zhang, W; Fukumoto, K; Saito, Y; Machida, H; Norinaga, K

    APPLIED THERMAL ENGINEERING   Vol. 218   2023.1

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Applied Thermal Engineering  

    Effective thermal conductivity in open-cell foam with hierarchical pore structure was estimated using lattice Boltzmann method. A new structure algorithm was proposed to reconstruct hierarchical pore structure in open-cell foam. In order to elucidate the heat transfer characteristics in hierarchical pore structure, the effect of structure parameters, namely the hierarchical pore size ratio (d2/d1), the hierarchical pore volume ratio (V2/V1), and temperature on the effective thermal conductivity was investigated. These results indicated that hierarchical pore structure is unfavorable to the effective thermal conductivity in open-cell foam for the heat conduction process. At high temperatures (Tave = 450–1650 K), however, the effective thermal conductivity in hierarchical pore structure is higher than that in uniform pore structure considering heat radiation. Furthermore, for the heat conduction process, a correlation of the effective thermal conductivity related to open-cell foam with hierarchical pore structure was proposed and validated by available experimental data.

    DOI: 10.1016/j.applthermaleng.2022.119314

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  11. Modeling and estimating kinetic parameters for CO<inf>2</inf> methanation from fixed bed reactor experiments Reviewed

    Tsuboi T., Yasuda S., Choi C., Zhang W., Machida H., Norinaga K., Yajima T., Kawajiri Y.

    Journal of Advanced Manufacturing and Processing   Vol. 5 ( 1 )   2023.1

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Journal of Advanced Manufacturing and Processing  

    CO2 methanation, which converts CO2 and hydrogen into methane as fuel, is one of the promising candidates for the development of CO2 utilization technologies. Recently, a highly active catalyst made of Ni/ZrO2 for methanation has been developed, and is currently investigated as a potential use in a high-performance reactor. However, design of reactor must be carried out carefully, since this reaction is highly exothermic, which may cause reactor runaway and deterioration of catalysts. For this problem, a mathematical model that can predict the behavior inside the reactor is necessary. In this work, we consider the methanation reaction of CO2 in a reactor model and estimate the kinetic parameters in the reaction rate model from experimental data. In the parameter estimation using literature values and Tikhonov regularization, eight kinetic parameters in the rate equations were identified from 64 data points with a wide range of conditions. We confirm that molar fractions at the reactor exit predicted by this reactor model are in good agreement with the experimental results. Furthermore, the developed model was validated to predict the compositions and temperature that were not used in the estimation. We expect the developed model will be a powerful tool for the reactor design.

    DOI: 10.1002/amp2.10145

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  12. Experimental Study on Quantitative Evaluation of Transferable Hydrogen in Possible Raw Materials for Metallurgical Cokes Including Bituminous, Sub-bituminous, Lignite Coals and Biomass

    Zhang, LJ; Uehara, Y; Nakamura, M; Choi, C; Liu, C; Machida, H; Hayashizaki, H; Kawai, Y; Hata, Y; Norinaga, K

    ISIJ INTERNATIONAL   Vol. 63 ( 9 ) page: 1441 - 1450   2023

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:ISIJ International  

    Researchers have thoroughly studied coal pyrolysis over a long period, while the analysis of volatile evolution and the chemical structural changes of solid char were carried out individually in most of the studies. In this work, we quantified the chemical reactions to explain the different physical phenomena, such as softening and caking properties, exhibited by different ranks of coals during pyrolysis. Four typical carbonaceous feedstocks (bituminous, sub-bituminous, lignite coals, and biomass) were selected as test samples. The authors analyzed the generated gas during pyrolysis by using a quadrupole mass spectrometer (Q-MS) and the chemical structure of the pyrolyzed char via spectroscopic methods (NMR, FT-IR, CHNS, and XPS) to gain new insights into the pyrolysis mechanism of the carbonaceous feedstocks. Transferable hydrogen was introduced to define the hydrogen used to stable the free radicals formed during pyrolysis, which can be obtained by quantifying the conversion routes of hydrogen. The hydrogen released for the growth of aromatic clusters has three pathways, namely, (1) consumption by the hydrodeoxygenation reaction to produce pyrolytic vapor, (2) release as gaseous H2, and (3) transferable hydrogen. The calculation shows that the amount of transferable hydrogen during pyrolysis decreases as the coal rank gets lower. For pyrolysis up to 500°C, the amount of transferable hydrogen is 3.96, 2.32, and 1.36 mol/kg-coal for bituminous, sub-bituminous, and lignite coals, respectively. On the other hand, the transferable hydrogen of biomass needs to be further considered in terms of the effect of cellulose and hemicellulose’s structure.

    DOI: 10.2355/isijinternational.ISIJINT-2022-517

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  13. Pretreatment of lignin by electrochemical hydrogenation to enhance the olefins and aromatic products during rapid pyrolysis

    Zhang, LJ; Sirisomboonchai, S; Choi, C; Machida, H; Norinaga, K

    JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS   Vol. 166   2022.9

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Journal of Analytical and Applied Pyrolysis  

    Lignin is one of the most promising biopolymers for producing hydrocarbons and aromatic compounds in nature. Electrochemical conversion of lignin is regarded as an attractive technology for producing various aromatic chemicals which are generally derived from fossil fuels. The author reports an electrochemical approach for hydrogenating alkaline lignin (AL), which uses relatively low-cost Ni foam as a working electrode under alkali electrolyte. The primary factors (such as power input, reactor type, temperature, reaction time, catalysts, and electrode substrates) of electrochemical hydrogenation were used to control the products' yield and features. The redox characteristics of the reaction system were directly compared with the cyclic voltammetry measurement under different parameters. After electrochemical hydrogenation (ECH), rapid pyrolysis was conducted on HAL samples to investigate the influence of electrochemical reactions on lignin. The maximum olefins and aromatics yield from HAL was increased to more than three times AL, accounting for 2.22 wt% and 4.07 wt%, respectively. Then, thermogravimetric analysis (TGA), elemental analysis (EA), Fourier-transform infrared spectroscopy (FTIR), and heteronuclear single quantum coherence (HSQC) NMR were employed to characterize hydrogenated lignin samples (HAL), as well as gas chromatography–mass spectrometry (GC-MS) was conducted to investigate the oil-phase products. This work focused on this electrochemical hydrogenation coupled with rapid pyrolysis process to give a possibility that converting lignin into not only liquid oil products, but solid hydrogenated lignin can be used to produce more olefins and aromatics in rapid pyrolysis, and presented the advantages and disadvantages of this two-stage process finally.

    DOI: 10.1016/j.jaap.2022.105625

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  14. Efficient CO<sub>2</sub> Electrochemical Reduction by a Robust Electrocatalyst Fabricated by Electrodeposition of Indium and Zinc over Copper Foam

    Sirisomboonchai, S; Machida, H; Tran, KVB; Kawasumi, M; Norinaga, K

    ACS APPLIED ENERGY MATERIALS   Vol. 5 ( 8 ) page: 9846 - 9857   2022.8

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:ACS Applied Energy Materials  

    Electrochemical reduction of CO2comprising the CO2reduction reactuib (CO2RR) and oxygen evolution reaction (OER) is one of the most promising technologies for electrification of the chemical process industry. Here, the performance of a electrocatalyst with a three-dimensional structure of InZnCu on Cu foam (CF) is presented. This electrocatalyst was fabricated by electrodeposition of In and Zn over Cu and exhibited a superior reduction of CO2to CO at a Faradaic efficiency of 93.7% at -0.7 V and an excellently long duration of 100 h. Due to the synergy of the thin In layer, the Zn nanosheets provided a high surface-active area and strong mechanical robustness during the reaction. Additionally, a two-electrode system was constructed based on the CF-modified surface, which provided valuable guidelines on the overall CO2RR-OER system for further evolution. Furthermore, due to the facile synthesis, the bimetal-layer double hydroxide (LDH) exhibited high conductivity and high OER performance. Hence, the two-electrode system assembled excellent electrocatalysts for the CO2RR-OER (InZnCu/CF||Cu(OH)2NWs@NiCo-LDH/CF) with high conversions of CO2to CO of 67% and 88% at 2 and 50 mA cm-2, respectively. Notably, the CO2RR-OER system exhibited excellent stability in a 40 h CO2conversion with a constant current density of 2 mA cm-2at an ultralow voltage of 1.59 V. Moreover, the calculation of the energy input converting CO per ton of CO2resulted in a low energy input range for further development in scalability. This overall CO2RR-OER proposes development in electrochemical CO2reduction for industrial applications.

    DOI: 10.1021/acsaem.2c01564

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  15. Selective hydrogenation of furfural to tetrahydrofurfuryl alcohol in 2-butanol over an equimolar Ni-Cu-Al catalyst prepared by the co-precipitation method

    Rao, TU; Suchada, S; Choi, C; Machida, H; Huo, ZB; Norinaga, K

    ENERGY CONVERSION AND MANAGEMENT   Vol. 265   2022.8

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Energy Conversion and Management  

    In order to upgrade biomass-derived platform chemicals to high value-added chemicals and liquid fuels, it is highly advantageous and desirable to synthesize suitable non-precious bimetallic catalysts that are efficient and versatile in chemical reactions. Equal moles of Ni and Cu were dispersed on varying mole ratios of Al by the co-precipitation method to synthesize Ni-Cu alloy particles to obtain a maximum yield of tetrahydrofurfuryl alcohol (THFA) by the liquid phase hydrogenation of furfural. The nickel species were active for both the furan ring (C=C) and carbonyl group (C=O) of furfural molecule, while Cu species were highly active for only the carbonyl group of furfural molecule. Systematic characterization of the prepared catalysts by XRD, TPR, STEM-EDS, and XPS analysis revealed the formation of highly active Ni-Cu alloys and near-equal Ni/Cu surface contents were achieved for the equimolar catalyst, which showcased a maximum of 98 mol% yield of THFA at 140 °C, 30 bar, 4 h. The reaction pressure and temperature showed a substantial effect on the product yield. The solvent selection also influenced the product selectivity, particularly with 2-butanol, which promoted the reaction with its hydrogen donor capacity and supported the ring hydrogenation of FAL to THFA. Moreover, the reduced Ni1Cu1-Al1 catalyst displayed good recyclability for three runs and an equal activity to that of a fresh catalyst after the regeneration.

    DOI: 10.1016/j.enconman.2022.115736

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  16. Phase equilibrium modeling of mixtures containing conformationally flexible molecules with the COSMO-SAC model

    Hung, YC; Hsieh, CM; Machida, H; Lin, ST; Shimoyama, Y

    JOURNAL OF MOLECULAR LIQUIDS   Vol. 356   2022.6

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Journal of Molecular Liquids  

    The multi-conformational structures sampling of a molecule, considered as conformational information, is found to be crucial for applying COSMO-SAC to systems containing compounds with flexible molecular structures, such as alkylene glycol derivatives. In this study, a hybrid modeling approach that combines the COSMO-SAC model with classical molecular dynamics (MD) is proposed to investigate the phase behavior of systems containing alkylene glycol derivatives. The accuracy in predicting liquid–liquid equilibrium (LLE) was found to be strongly influenced by conformational populations obtaining from MD simulations under different solvation environments. The overall root mean square deviation (RMSD) in predicting LLE mutual solubility from COSMO-SAC for seven selected mixtures containing alkylene glycol derivatives reduces from 19.1% to 10.1% when conformation distribution is included. The new approach significantly improves the accuracy in predicting phase behaviors for alkylene glycol derivatives solutions and can be applied to systems containing compounds with flexible molecular structures.

    DOI: 10.1016/j.molliq.2022.118896

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  17. Modeling of phase separation solvent for CO<sub>2</sub> capture using COSMO-SAC model

    Hung, YC; Hsieh, CM; Machida, H; Lin, ST; Shimoyama, Y

    JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS   Vol. 135   2022.6

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Journal of the Taiwan Institute of Chemical Engineers  

    Background: Phase separation solvents are proposed to replace conventional solvents for CO2 capture due to a significant reduction of absorbent regeneration heat. A predictive approach based on COSMO-SAC is developed to model the CO2 capture process using the phase separation solvent of 2-(ethylamino)ethanol (EAE) + water + diethylene glycol diethyl ether (DEGDEE). Methods: In this approach, liquid phase compositions, including CO2 solubility, are determined from vapor-liquid-liquid equilibrium calculation with a chemisorption reaction in both liquid phases. The behavior of phase separation after CO2 capture and CO2 solubility in both CO2-lean and CO2-rich phases at 313 and 353 K can be well described by the proposed approach. Significant findings: The overall root-mean-square-deviation (RMSD) in predicting compositions (128 data points) of all components in both liquid phases is 0.064, which is slightly better than a previous study on the accuracy of COSMO-SAC in LLE prediction (RMSD = 0.105). The phase separation behavior of solvent can be realized with the hydrophilic product upon CO2 absorption from the σ-profile analysis. The proposed framework is expected to be a useful tool for the development of a new phase separation solvent.

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  18. CFD simulation of the Sabatier process in a shell-and-tube reactor under local thermal non-equilibrium conditions: Parameter sensitivity and reaction mechanism analysis

    Lin, YX; Zhang, W; Machida, H; Norinaga, K

    INTERNATIONAL JOURNAL OF HYDROGEN ENERGY   Vol. 47 ( 34 ) page: 15254 - 15269   2022.4

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    The Sabatier process is a competitive technology applied for carbon capture and utilization. This process increases the risk of carbon deposition and catalyst thermal degradation because of its exothermic property. In this study, a CFD model verified through existing experimental data was established to systematically investigate the Sabatier process in a shell-and-tube reactor. The effects arising from several operating parameters (e.g., gas flow rate, feed gas composition, the thermal conductivity of catalyst pellet, the inlet temperature of cooling phase, as well as phase change refrigeration) on temperature profile and reaction performance were studied. Moreover, a mechanism of three reactions was investigated, including CO2 methanation, CO methanation, as well as RWGS reaction. Furthermore, the competition between CO2 methanation and RWGS reaction was explored. According to the further sensitivity analysis, increasing the thermal conductivity of the catalyst particles would be effective to inhibit hot spots, while keeping the carbon conversion rate unchanged.

    DOI: 10.1016/j.ijhydene.2022.03.029

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  19. Unveiling the mechanism of CO<inf>2</inf>-driven phase change in amine + water + glycol ether ternary mixture

    Journal of the Taiwan Institute of Chemical Engineers   Vol. 131   2022.2

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    DOI: 10.1016/j.jtice.2021.11.010

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  20. A review of thermal catalytic and electrochemical hydrogenation approaches for converting biomass-derived compounds to high-value chemicals and fuels

    Zhang, LJ; Rao, TU; Wang, JY; Ren, DZ; Sirisommboonchai, S; Choi, C; Machida, H; Huo, ZB; Norinaga, K

    FUEL PROCESSING TECHNOLOGY   Vol. 226   2022.2

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    Major global issues such as greenhouse gas emissions and the excessive use of fossil fuels lead to looking for sustainable and clean energy resources. Lignocellulosic biomass is a prospective resource for sustainable carbon-based energy. The production of petroleum-based green fuels, chemicals, and solvents from biomass-derived products has garnered much attention in the recent past. The study of biomass derivatives hydrogenation improves the efficiency of generating high-value chemicals and provides much-needed insights into the primary reaction mechanism for the effective utilization of raw constituents or biomass. However, the existing thermochemical conversions of biomass and biomass-derived products such as thermal catalytic hydrogenation (TCH) involve energy-intensive and expensive processes. In this regard, sustainable energy generation attracts alternative conversion technologies, including electrochemical conversion (ECC), electrocatalytic hydrogenation (ECH), and photocatalytic conversions that can be directly integrated with renewable wind/solar technologies and operated at ambient or lower temperatures. The role of electrocatalyst and electrolyte is pivotal to achieve efficient and selective ECH of biomass organics. This review paper summarizes the utilization of TCH and ECH processes on cellulose/hemicellulose, lignin, and their derivatives/model compounds, including catalyst types, reaction conditions, hydrogenation efficiency, and technical limitations. The advantages and disadvantages of the two technologies for biomass utilization have also been compared, which provides a more favourable knowledge base and theoretical basis for the subsequent research work.

    DOI: 10.1016/j.fuproc.2021.107097

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  21. Durability and fire-hazardous-risk evaluation of unique phase separation solvent using high-boiling-point amine and ether

    Maeda, N; Kishimoto, A; Machida, H; Yamaguchi, T; Yanase, K; Norinaga, K

    INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL   Vol. 114   2022.2

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    Durability and fire hazard risk evaluations were conducted to determine the process feasibility of a unique phase separation solvent with a low regeneration temperature (90 °C) consisting of an amine, ether, and a small amount of water. The results are as follows. I) The amine degradation rate of the phase separation solvent was determined to be less than 1/10 of that of monoethanolamine, which was attributed to the high oxidative resistance and low regeneration temperature of the former. II) The composition of the gas that formed in the absorber was completely out of the combustible range during the treatment of 6% oxygen-containing gas on a dry basis. Therefore, we believe that this phase separation solvent is applicable to the treatment of exhaust gas from coal-fired thermal power plants and can realize stable operation with a small amount of amine required for replenishment.

    DOI: 10.1016/j.ijggc.2021.103532

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  22. Fluctuation in diethylene glycol diethyl ether/water mixtures near the lower critical solution temperature studied by small- and wide-angle x-ray scattering and thermodynamic calculation

    Yanase, K; Tran, KVB; Yamaguchi, T; Machida, H; Norinaga, K

    JOURNAL OF MOLECULAR LIQUIDS   Vol. 346   2022.1

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    We studied local structure of diethylene glycol diethyl ether (DEGDEE)-water mixtures near the lower critical solution temperature (LCST) by means of simultaneous small- and wide-angle x-ray scattering measurement and thermodynamic calculation based on the activity coefficient model. Long-wavelength limits of structure factors SNN(0), SCC(0), and SNC(0), which respectively represent mean square fluctuations in the particle number, the concentration, and their cross correlation, are determined from scattering intensity extrapolated to the zero scattering vector and thermodynamic quantities according to the Bhatia and Thornton formula. SNN(0) and SCC(0) exhibit maxima near critical concentration. We found that difference between partial molar volumes of water and DEGDEE essentially results in SNN(0) values being one order of magnitude larger than SCC(0) values. Further, we determined Kirkwood-Buff (KB) integrals to clarify a mixing state of the solution from a mesoscopic point of view. The KB integrals also exhibit extrema near critical concentration. These results demonstrate self-segregations of both DEGDEE and water in a nanometer length scale even at homogeneous solution states, which can be regarded as a precursor of the macroscopic phase separation. Concentration dependence of the wide-angle scattering curve suggests that the short-range structure, whose length scale is sub-nanometer, moderately changes between the intrinsic bulk structures of DEGDEE and water. Comparison of the KB integrals with those determined by the activity coefficient model using non-random two-liquid equation is presented and effects of the fluctuation on the phase behavior are discussed.

    DOI: 10.1016/j.molliq.2021.117830

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  23. Determination of Kinetic Parameters for CO<sub>2</sub> Methanation (Sabatier Reaction) over Ni/ZrO<sub>2</sub> at a Stoichiometric Feed-Gas Composition under Elevated Pressure

    Choi, C; Khuenpetch, A; Zhang, W; Yasuda, S; Lin, YX; Machida, H; Takano, H; Izumiya, K; Kawajiri, Y; Norinaga, K

    ENERGY & FUELS   Vol. 35 ( 24 ) page: 20216 - 20223   2021.12

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    Methanation of CO2 using H2 obtained by renewable energy sources has been gaining attention as one of the promising options for utilizing captured CO2 and surplus power obtained when intermittent power sources such as solar and wind energy are used. Herein, kinetics of CO2 methanation over Ni/ZrO2 was studied using a tubular quartz reactor at 0.9 MPa. The Sabatier reaction (CO2 + 4H2 = CH4 + 2H2O, ΔHr298K = – 165 kJ mol–1) was carried out under stoichiometric gas feeding (CO2/H2 = 1/4 v/v to CH4/H2O = 1/2 v/v), and its reaction rate was determined. The exothermic nature of CO2 methanation and extremely high catalytic activities increased the reaction temperature to 400–600 °C even when the feed-gas temperature was as low as 250–400 °C, and the gas hourly space velocity was as high as 3 × 106 h–1. Nonlinear regression analyses based on one- and multistep kinetic models were used to investigate the reaction rates to estimate the kinetic parameters. Both models with optimized parameters can reproduce the experimentally obtained CH4 formation rates for the entire range of the feed-gas conversion with a coefficient of determination (R2) of over 0.98.

    DOI: 10.1021/acs.energyfuels.1c01534

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  24. An Alternative CO<sub>2</sub> Capture with a Pressure Swing Amine Process Driven by Cryogenic Pumping with the Unused Cold Energy of Liquefied Natural Gas

    Machida, H; Hashiride, R; Niinomi, R; Yanase, K; Hirayama, M; Umeda, Y; Norinaga, K

    ACS SUSTAINABLE CHEMISTRY & ENGINEERING   Vol. 9 ( 47 ) page: 15908 - 15914   2021.11

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    This paper presents an alternative concept of CO2 capture that can substantially reduce the energy required for CO2 capture by utilizing unused cold energy. The heat of vaporization of liquefied natural gas (LNG), of which the boiling point is 110 K, is a possible candidate for unused cold energy. This technology is based on a pressure swing amine process combined with a sublimation tank to cool CO2 released from a desorber into dry ice by exchanging the LNG cold energy. The feature of this technology is that pure CO2 is recovered mostly by a pressure swing that decreases the pressure in the desorber utilizing a cryogenic pump with CO2 sublimation instead of a mechanical pump. We developed an amine-based absorbent that can realize the proposed process for exhaust gas from a fossil fuel-fired power plant. A process simulation indicated that the required energy is as low as 0.25 GJ/ton CO2 when both the absorber and the desorber are operated at around 313 K, the desorber pressure is reduced to 1 kPa, and the sublimation tank is operated at 150 K.

    DOI: 10.1021/acssuschemeng.1c05892

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  25. Inhibition of temperature runaway phenomenon in the Sabatier process using bed dilution structure: LBM-DEM simulation

    Lin, YX; Yang, C; Choi, C; Zhang, W; Fukumoto, K; Machida, H; Norinaga, K

    AICHE JOURNAL   Vol. 67 ( 10 )   2021.10

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    The Sabatier process is promising for carbon dioxide utilization and energy storage. However, the serious problem that limits more comprehensive industrial applications is catalyst deactivation due to the temperature runaway phenomenon. The inert particle dilution approach, including the mixing dilution method and layered dilution method is applied to solve this problem. Based on the lattice kinetic scheme-lattice Boltzmann method (LKS-LBM), the effects of three parameters in bed dilution structure reconstructed by the discrete element method (DEM) on temperature distribution and carbon conversion rate were discussed, so as to investigate the relationship between packing structure and temperature distribution. Furthermore, numerical results indicated that an optimal bed dilution structure, which not only can control the peak temperature below the critical temperature to avoid coking and sintering of catalyst, but also can improve the conversion rate by almost 18% compared with the structure without dilution under the same circumstance.

    DOI: 10.1002/aic.17304

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  26. Towards design of phase separation solvent for CO<sub>2</sub> capture using COSMO-SAC model

    Hung, YC; Hsieh, CM; Machida, H; Lin, ST; Shimoyama, Y

    JOURNAL OF MOLECULAR LIQUIDS   Vol. 336   2021.8

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    There is a growing interest in developing CO2 capture processes based on phase separation solvents due to its much lower energy consumption compared to the reference amine process using monoethanolamine (MEA). In this work, the predictive COSMO-SAC activity coefficient model was applied to describe phase behavior for phase separation solvent composed of amine + water + glycol ether. From the calculated ternary liquid-liquid equilibrium (LLE) phase diagram, ternary mixtures of fourteen selected amines + water + glycol ether can be classified into miscible- or immiscible-type solvents. The work presented here indicates that amines having comparable affinity to water and glycol ether generally result in a smaller two-phase region and form type I phase behavior near the amine-lean region. The amines having a strong affinity to water or glycol ether show a larger two-phase region and result in type II phase behavior. Further analysis shows that KOW and σ-profile can be good indicators for the affinity of amine to water and glycol ether, which is the key factor to determine the phase behavior of investigated ternary mixtures. The feed composition and operating temperature of phase separation solvent should be judged by the interaction between solvent molecules. This study demonstrates that COSMO-SAC is a useful tool for exploiting the phase behavior of potential phase separation solvents with limited available experimental data.

    DOI: 10.1016/j.molliq.2021.116229

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  27. Density and Viscosity Calculation of a Quaternary System of Amine Absorbents before and after Carbon Dioxide Absorption

    Tran, KVB; Sato, M; Yanase, K; Yamaguchi, T; Machida, H; Norinaga, K

    JOURNAL OF CHEMICAL AND ENGINEERING DATA   Vol. 66 ( 8 ) page: 3057 - 3071   2021.8

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    Viscosity and density of amine absorbents affect directly their flow, which is involved in the process design and simulation of carbon dioxide capture. A mixture of 2-(ethyl amino) ethanol (EAE), diethylene glycol diethyl ether (DEGDEE), and water changes its phase from homogeneous to two-liquid ones on CO2 absorption. It is difficult to calculate the viscosity and density of this phase separation solution, especially those of quaternary-component phases. In this research, models to calculate the density and viscosity of the quaternary-component system of EAE/DEGDEE/water/carbamate were suggested based on nonrandom two-liquid (NRTL)-DVOL and NRTL-DVIS models. Given the component concentrations, these models can replicate well the viscosity and density of the solutions. A good calculation result with a few numbers of parameters makes the models simple and easy to use.

    DOI: 10.1021/acs.jced.1c00195

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  28. Production of light hydrocarbons from organosolv lignin through catalytic hydrogenation and subsequent fast pyrolysis

    Zhang, LJ; Choi, C; Machida, H; Norinaga, K

    JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS   Vol. 156   2021.6

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    Valorization and utilization of lignin have been drawing increasing attention recently. Hydroprocess is one of the main technologies, which can reduce organic compounds and partially depolymerize the macromolecular structure of lignin. The mechanism of lignin hydroprocess has been extensively discussed focusing on hydrogenolysis. In contrast, the solid residue regarded as unreacted or depolymerized lignin has drawn less attention so far. This study proposes an integrated process that consists of catalytic hydrogenation and subsequent fast pyrolysis for valorizing lignin. The results showed that 48−87 wt.% of solid product could be recovered as hydrogenated lignin (H-EOL) after hydrogenation at 200–250 ℃ for 1−7 h. Chemical structure of H-EOL was comprehensively investigated by means of elemental analysis, FTIR, 13C & 1H NMR, and TGA. Furthermore, behavior of fast pyrolysis of H-EOL was detected here for the first time. H-EOL has higher hydrogen to carbon atomic effective ratio(H/Ceff ratio) and achieves the increasing reactivity of thermal decomposition. H-EOL yields light olefins double as much as raw ethanol organosolv lignin (EOL). And the formation of alkanes (C1-C4), benzene, and toluene was promoted to various degrees, while the yield of carbon monoxide, carbon dioxide, and vapor decreased. A novel and efficient pretreatment method has been provided to valorize lignin, which is instructive for subsequent research.

    DOI: 10.1016/j.jaap.2021.105096

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  29. An Approach to Simulate Vapor Phase Reactions of Coal Volatiles in a Reducing Section of the Two Stage Entrained Flow Gasifier with a Detailed Chemical Kinetic Model

    Choi, C; Adachi, N; Zhang, W; Machida, H; Hayashi, J; Watanabe, H; Norinaga, K

    JOURNAL OF CHEMICAL ENGINEERING OF JAPAN   Vol. 54 ( 6 ) page: 334 - 343   2021.6

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    An approach in predicting reactions undergone by coal volatiles in a reducing section (reductor) of an air-blown two-stage entrained flow gasifier toward designing a better gasification process was proposed. A detailed chemical kinetic model was applied to simulate chemical reactions of a complex molecular mixture of the coal volatiles evolved due to rapid pyrolysis of coal fed into the reductor. The composition of volatiles was determined based on pyrolysis-gas chromatography experiments, where 22 compounds, including inorganic gases (H2, H2O, CO and CO2), light hydrocarbon gases (C1–C4), and aromatic hydrocarbons (benzene to pyrene) were identified. Gas composition at the reductor inlet was estimated by integrating the information on the experimentally obtained molecular composition of the volatiles, and the thermodynamically calculated composition of inorganic gases generated from the combustor and the coal feeding rates into reductor and combustor. Concentration profiles of the individual chemical species, as well as soot particles together with the flow direction of the reductor, were revealed using an extended detailed chemical kinetic model involving 202 species, 1351 gas-phase reactions, and 101 surface reactions for soot formation and growth. The simulation revealed that near-complete decomposition of tar regarded as a set of all aromatic hydrocarbons is likely to require operation temperature of the reductor at temperatures as high as 1200°C, when the combustor is operated at 1800°C.

    DOI: 10.1252/jcej.20we171

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  30. A Review on Detailed Kinetic Modeling and Computational Fluid Dynamics of Thermochemical Processes of Solid Fuels

    Choi, C; Zhang, W; Fukumoto, K; Machida, H; Norinaga, K

    ENERGY & FUELS   Vol. 35 ( 7 ) page: 5479 - 5494   2021.4

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    This review presents the recent advances in computational approaches to understand thermochemical reactions of solid fuels with minimized empirical factors. It includes studies on kinetic modeling of gas-phase reactions of multicomponent molecular mixtures of volatiles derived from primary pyrolysis of solid fuels using a database for elementary reactions. Mechanistic studies to model the devolatilization of biomass and coal upon heating are also mentioned. The efforts to integrate the kinetic model with computational fluid dynamics to understand the flow and heat transfer behavior of industrial reactors for solid fuel conversions, including gasification and combustion, are reviewed. These advances are primarily based on the conventional forward analysis that provides a deeper understanding of chemically reacting flows of fuels undergoing thermochemical reactions. For the further development of the thermochemical conversion technology, it can be expected to develop alternative approaches such as inverse analysis to determine the optimal reactor design and operating conditions.

    DOI: 10.1021/acs.energyfuels.0c04052

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  31. Lattice Boltzmann simulation of multicomponent reaction-diffusion and coke formation in a catalyst with hierarchical pore structure for dry reforming of methane

    Lin Y.

    Chemical Engineering Science   Vol. 229   2021.1

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    DOI: 10.1016/j.ces.2020.116105

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  32. Catalytic hydrotreatment of alkaline lignin and its consequent influences on fast pyrolysis

    Zhang, LJ; Choi, C; Machida, H; Huo, ZB; Norinaga, K

    CARBON RESOURCES CONVERSION   Vol. 4   page: 219 - 229   2021

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    The current state of lignin has been characterized by these three: (1) as one of the main components in lignocellulosic biomass with an abundant amount; (2) not be taken seriously but treated as a waste product; (3) underutilized due to a complex and stubborn structure. However, lignin can be a rich source for hydrocarbons and aromatic compounds when gives appropriate utilization. In this work, we have studied the hydrotreatment of alkaline lignin (AL) under relatively mild conditions and further investigated the characterization of hydrogenated lignin (HL), especially the behavior during fast pyrolysis. The recovery of the HL decreased with increasing reaction temperature from 60 wt.% to 41 wt.% in the range of 150–250 ℃. The hydrotreated products were analyzed using Elemental Analysis, FTIR (for HL) and GC–MS (for bio-oil). The HL samples were found to have a higher hydrogen/carbon atomic effective ratio (H/Ceff ratio) and a higher degree of saturation than AL. Compared to the internal structure of the lignin before and after hydrotreatment, the side chain groups were removed from AL during the process. After that, from the fast pyrolysis of HL, it was observed that more light hydrocarbons and aromatic compounds were formed than that of AL. Furthermore, fast pyrolysis in the hydrogen atmosphere revealed that more volatile fractions were released compared to the Helium atmosphere. The total olefins yield was increased for HL compared AL from 1.02 wt.% to 3.1 wt.% at 250 ℃ for 7 hours. This study of HL is instructive to some extent for the industrial utilization of lignin.

    DOI: 10.1016/j.crcon.2021.09.001

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  33. A comprehensive study on butanolysis of furfuryl alcohol to butyl levulinate using tungstated zirconia and sulfonated carbon catalysts

    Thuppati, UR; Choi, C; Machida, H; Norinaga, K

    CARBON RESOURCES CONVERSION   Vol. 4   page: 111 - 121   2021

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    This work presents the formation of butyl levulinate, a potential fuel additive, and an excellent renewable chemical obtained by the butanolysis of furfuryl alcohol (FAL) over a solid acid catalyst. The butanolysis of furfuryl alcohol reaction is a strong function of acidity for which tungstated zirconia (WO3-ZrO2), a robust solid acid catalyst, and a sulfonated carbon catalyst were employed to produce high yields of butyl levulinate targeting a lower initial molar ratio of butanol to FAL. A maximum of 28 mol% yield of butyl levulinate was obtained with tungstated zirconia catalyst. Easily prepared sulfonated carbon catalyst at high reaction temperatures facilitated the complete conversion of reaction intermediate, 2-butoxymethylfuran (2-BMF) through which butyl levulinate was formed, and as high as 80 mol% of butyl levulinate yield was produced at an initial mole ratio of 8.5:1 of butanol to FAL. The better results of sulfonated carbon catalyst could be attributed to the presence of -SO3H, carboxylic acid, and phenolic OH groups on the carbon surface.

    DOI: 10.1016/j.crcon.2021.03.003

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  34. Evaluation CO<inf>2</inf> solubility in biphasic solvent with AMP/Ether/Water for CO<inf>2</inf> capture

    Esaki T., Ueno Y., Uchiyama H., Matsukuma Y., Machida H.

    Proceedings of the International Conference on Power Engineering 2021, ICOPE 2021     2021

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    We suggest new CO2 absorption processes with biphasic phase separation type for reducing consumption energy. the CO2-rich solution liquid was separated hydrophilic liquid and hydrophobic liquid. In this work, we studied some kind of amine and ether mixture solvents, and observed phase separation phenomena. From the results of phase separation characteristics, we selected with 2-Amino-2-methyl-1-prophanol (AMP), diethylene diethyl ether (DEGDEE) and water pair. We measured the CO2 solubility at different temperature and CO2 patricidal pressure conditions, and evaluated the effect of component concentration in the solvents on CO2 absorption characteristics and phase separation phenomena. We adjusted the biphasic solvents. AMP, DEGDEE and H2O of biphasic solvent weight-composition ratio are 30, 20 and 50 wt% respectively. The CO2 solubility of absorption at 40 ℃, 0.1atm was obtained 0.647 mol-CO2/mol-AMINE. The CO2 solubility of desorption at 90℃, 1.0 atm was obtained 0.177 mol-CO2/mol-AMINE. The difference of CO2 loading of this solvent was high performance of CO2 capture compared with that of other solvents. These result is attributed to the additive phase assisting in the regeneration of CO2 by extracting the regenerated amine. The results of the present study show reduction of desorption temperature and high CO2 absorption performance.

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  35. Energy analysis of CO<inf>2</inf> separation process with low energy consumption using phase separation solvent

    Maeda N., Nakanishi K., Kishimoto A., Machida H., Yamaguchi T., Norinaga K.

    15th Greenhouse Gas Control Technologies Conference 2021, GHGT 2021     2021

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    We calculated the energy required for regeneration when the phase separation solvent solvent is applied to the treatment of exhaust gas from coal-fired power plants. This solvent is characterized by regeneration at a low temperature of less than 100°C. As a result, it was clarified that under ideal conditions with no pressure drop and no heat loss, the required energy could be suppressed to 1.5 GJ/ton-CO2 by satisfying the following conditions; i) pinch point of the heat exchanger between rich-amine and lean-amine: 1 °C, ii) water concentration of the solvent: kept at 10 wt%, iii) COP of the heat pump: 5.5. However, increase of the pinch point, increase of the water concentration, and decrease of the COP will all result in a significant increase in the required energy. Therefore, in order to realize a process with low energy consumption, it is essential to meet these design constraints.

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  36. Durability and fire-hazardous-risk evaluation of unique phase separation solvent using high-boiling amine and ether

    Maeda N., Kishimoto A., Machida H., Yamaguchi T., Yanase K., Norinaga K.

    15th Greenhouse Gas Control Technologies Conference 2021, GHGT 2021     2021

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    Durability and fire hazard risk evaluation were conducted to determine the process feasibility on the unique phase separation solvent with low regeneration temperature (90 °C), consisting of amine, ether, and small amount of water. The results we obtained are as follows; I) The amine degradation rate of the phase separation solvent would be less than 1/10 of that of monoethanolamine (MEA), which was contributed by its high oxidative resistant nature and low regeneration temperature. II) The gas composition formed in the absorber was completely out of combustible range and almost no accumulations of explosive compounds such as peroxides were observed when in contact with 6 % oxygen containing gas (dry base). Therefore, we believe that the phase separation solvent is applicable to the treatment of exhaust gas from coal-fired thermal power plants.

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  37. Prediction of Phase Behavior of CO2 Absorbents Using Conductor-like Screening Model for Real Solvents (COSMO-RS): An Approach to Identify Phase Separation Solvents of Amine/Ether/Water Systems upon CO2 Absorption

    Nakaoka Mana, Tran Khuyen V. B., Yanase Keiichi, Machida Hiroshi, Norinaga Koyo

    INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH   Vol. 59 ( 42 ) page: 19020-19029   2020.10

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    DOI: 10.1021/acs.iecr.0c03233

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  38. Online composition analysis of phase separation solvent for carbon dioxide capture using ATR‐FT‐IR

    Miho Sato Khuyen Viet Bao Tran Tsuyoshi Yamaguchi Hiroshi Machida Koyo Norinaga

    Journal of Advanced Manufacturing and Processing   Vol. 2 ( 4 ) page: 1 - 12   2020.10

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    DOI: 10.1002/amp2.10067

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  39. Energy-Saving CO2 Capture by H-2 Gas Stripping for Integrating CO2 Separation and Conversion Processes

    Machida Hiroshi, Esaki Takehiro, Yamaguchi Tsuyoshi, Norinaga Koyo

    ACS SUSTAINABLE CHEMISTRY & ENGINEERING   Vol. 8 ( 23 ) page: 8732-8740   2020.6

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    DOI: 10.1021/acssuschemeng.0c02459

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  40. Carbon Dioxide Absorption Heat in Liquid-Liquid and Solid-Liquid Phase-Change Solvents Using Continuous Calorimetry

    Tran Khuyen V. B., Ando Ryuya, Yamaguchi Tsuyoshi, Machida Hiroshi, Norinaga Koyo

    INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH   Vol. 59 ( 8 ) page: 3475-3484   2020.2

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    DOI: 10.1021/acs.iecr.9b04672

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  41. Computational fluid dynamics simulation of CO<inf>2</inf> methanation in a shell-and-tube reactor with multi-region conjugate heat transfer

    Zhang W.

    Chemical Engineering Science   Vol. 211   2020.1

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    DOI: 10.1016/j.ces.2019.115276

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  42. Rate of CO2 absorption of a phase‐separation absorbent

    Takehiro Esaki, Hiroshi Machida, Koyo Norinaga

    Journal of Advanced Manufacturing and Processing   Vol. 2 ( 1 ) page: 1 - 7   2020.1

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    DOI: 10.1002/amp2.10033

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  43. Modelling of CO<inf>2</inf> solubility in phase separation solvent composed of amine/ether/water system for CO<inf>2</inf> capture

    Machida H.

    Journal of Molecular Liquids   Vol. 292   2019.10

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.molliq.2019.111411

    Scopus

  44. Quantitative Analyses of Chemical Structural Change and Gas Generation Profile of Coal upon Heating toward Gaining New Insights for Coal Pyrolysis Chemistry

    Fukuoka Tetsuya, Takeda Norihiro, Zhang Lu, Machida Hiroshi, Zhang Wei, Watanabe Masahiko, Nishibata Yuko, Hayashi Jun-ichiro, Norinaga Koyo

    ISIJ INTERNATIONAL   Vol. 59 ( 8 ) page: 1376-1381   2019

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.2355/isijinternational.ISIJINT-2018-816

    Web of Science

    Scopus

  45. An approach for quantifying transferable hydrogen in pyrolyzing coals

    Norinaga K., Fukuoka T., Machida H., Zhang W.

    36th Annual International Pittsburgh Coal Conference: Clean Coal-Based Energy/Fuels and the Environment, PCC 2019     2019

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:36th Annual International Pittsburgh Coal Conference: Clean Coal-Based Energy/Fuels and the Environment, PCC 2019  

    Scopus

  46. Reducing energy required for CO<inf>2</inf> separation and recovery process by employing phase separation solvents

    Norinaga K., Nishio H., Khuyen T., Machida H.

    36th Annual International Pittsburgh Coal Conference: Clean Coal-Based Energy/Fuels and the Environment, PCC 2019     2019

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:36th Annual International Pittsburgh Coal Conference: Clean Coal-Based Energy/Fuels and the Environment, PCC 2019  

    Scopus

  47. Low temperature swing process for CO2 absorption-desorption using phase separation CO2 capture solvent

    Machida Hiroshi, Ando Ryuya, Esaki Takehiro, Yamaguchi Tsuyoshi, Horizoe Hirotoshi, Kishimoto Akira, Akiyama Katsuya, Nishimura Makoto

    INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL   Vol. 75   page: 1 - 7   2018.8

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.ijggc.2018.05.010

    Web of Science

    Scopus

  48. Shear Viscosity and Heterogeneous Structure of Alkylaminoethanol-Based CO2 Absorbents

    Yamaguchi Tsuyoshi, Ando Ryuya, Yoshida Koji, Yamaguchi Toshio, Machida Hiroshi

    JOURNAL OF PHYSICAL CHEMISTRY B   Vol. 122 ( 14 ) page: 4045-4050   2018.4

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/acs.jpcb.8b00946

    Web of Science

  49. Degradation Test for Energy-Saving CO<inf>2</inf> Absorbent based on Phase Separation Type Solvent by Aqueous (Amine + Ether) Solution

    Maeda N., Kishimoto A., Machida H., Yamaguchi T.

    GHGT 2018 - 14th International Conference on Greenhouse Gas Control Technologies     2018

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:GHGT 2018 - 14th International Conference on Greenhouse Gas Control Technologies  

    The unique phase separation type amine/ether absorbent is expected to realize the CO2 separation process with low-energy consumption (1.5GJ/ton-CO2). In this study, a degradation test of the absorbent under thermal load of liquid regeneration was conducted in order to clarify 1) the behavior of its performance declination for CO2 capture and 2) the behavior of amine loss mainly caused by generation of by-product. The regeneration condition was chosen based on two assumptions that a) most likely to damage to the solution, which means high-oxidation atmosphere containing oxygen and sulfur oxide, and b) adopting actual operating temperature when absorbing or desorbing. As a result, only a small amount of the CO2 capture capability was lost through 48 hours cyclic thermal load of 50-90 °C. Consequently, it was found that the phase separation type solvent could be durable enough for the practical use. Besides, the running cost associated with make-up amine might be drastically reduced.

    Scopus

  50. Energy-saving CO<inf>2</inf> Capture Process Using Phase Separation Type Solvent by Aqueous (amine + ether) Solution

    Machida H., Takehiro E., Yamaguchi T., Norinaga K., Kishimoto A., Akiyama K., Nishimura M.

    GHGT 2018 - 14th International Conference on Greenhouse Gas Control Technologies     2018

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    We have developed the phase separation solvent for CO2 capture. Our developed solvent consists amine, organic solvent and water and shows single liquid phase before CO2 absorption though it shows two liquid phases after CO2 absorption. Feature of phase separation solvent is reducing temperature difference between absorber and stripper. We apply the heat pump system for CO2 separation and evaluate the energy consumption. Low temperature swing process saves energy requirement for CO2 capture process with highly-effective reaction-heat recovering. To evaluate the CO2 capture system with our solvent, screening test for amine and organic solvent combination and CO2 solubility measurement were examined. In the phase separation test, three types of solvents were obtained by combining amine and ether, that is, no phase separation with CO2 scrubbing, phase separation with CO2 scrubbing, and thoroughly immiscible. The phase behaviour depends on the hydrophobicity of amines or organic solvents, and the types of solvents were classified using the hydrophobic parameter.

    Scopus

  51. Development of phase separation solvent for CO2 capture by aqueous (amine plus ether) solution

    Machida Hiroshi, Oba Kazuki, Tomikawa Takashi, Esaki Takehiro, Yamaguchi Tsuyoshi, Horizoe Hirotoshi

    JOURNAL OF CHEMICAL THERMODYNAMICS   Vol. 113   page: 64-70   2017.10

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.jct2017.05.043

    Web of Science

  52. 過酸化水素の予熱条件が流通式メタン水熱部分酸化改質反応に与える影響 Reviewed

    織田 耕彦, 町田 洋, 堀添 浩俊

    化学工学論文集   Vol. 43 ( 5 ) page: 342-346   2017.9

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1252/kakoronbunshu.43.342

  53. Partial Oxidation of Methane by Fenton Reaction under Hydrothermal Environment Reviewed

    Yasuhiko ORITA, Hiroshi MACHIDA, Hirotoshi HORIZOE

    Journal of the Japan Institute of Energy   Vol. 96 ( 8 ) page: 339-345   2017.8

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.3775/jie.96.339

  54. Phase Separation Solvent for CO2 Capture Reviewed

    Hiroshi Machida, Takehiro Esaki, Kazuki Oba, Takashi Tomikawa, Tsuyoshi Yamaguchi, Hirotoshi Horizoe

    Energy Procedia   Vol. 114   page: 823-826   2017.7

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.egypro.2017.03.1224

  55. Effect of Preheating Conditions of Hydrogen Peroxide on Flow-Type Hydrothermal Partial Oxidation of Methane

    Orita Yasuhiko, Machida Hiroshi, Horizoe Hirotoshi

    KAGAKU KOGAKU RONBUNSHU   Vol. 43 ( 5 ) page: 342-346   2017

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1252/kakoronbunshu.43.342

    Web of Science

  56. Biomass Pretreatment with Hydrothermal Explosion for Bioethanol Production Reviewed

    Machida, Hiroshi Honda, Yurie Saito, Masahiro Horizoe, Hirotoshi

      Vol. 96 ( 9 ) page: 386-392   2017

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.3775/jie.96.386

  57. Hydrogen Peroxide and Carbon Dioxide Effect on Biomass Hydrothermal Treatment Reviewed

    Hiroshi MACHIDA, Masahiro SAITO, and Hirotoshi HORIZOE

    Journal of the Japan Institute of Energy   Vol. 95 ( 639 ) page: 644   2016

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

  58. Modeling of CO2 Solubility in Tertiary Amine Solvents Using pKa Reviewed

    Hiroshi Machida, Hidetaka Yamada, Shin Yamamoto

    Journal of Chemical & Engineering Data   Vol. 61   page: 2144-2148   2016

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

  59. CO2 Solubility Measurements and Modeling for Tertiary Diamines Reviewed

    Hiroshi Machida, Hidetaka Yamada, Yuichi Fujioka, Shin Yamamoto

    Journal of Chemical & Engineering Data   Vol. 60   page: 814   2015

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

  60. High efficiency metal removal from hexane-extracted algae oil using super and subcritical propane Reviewed

    Hiroshi Machida, Hirotoshi Horizoe

    Energy Conversion and Management   Vol. 95   page: 90   2015

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

  61. High pressure vapor liquid equilibria measurements and modeling of butane ethanol system and isobutane ethanol system Reviewed

    H. Machida, K. Matsumura, H. Horizoe

    Fluid Phase Equilibria   Vol. 375   page: 176-180   2014.5

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

  62. Production of 5-hydroxymethylfurfural from corn stalk catalyzed by corn stalk-derived carbonaceous solid acid catalyst Reviewed

    Lulu Yan, Nian Liu, Yu Wang, Hiroshi Machida, Xinhua Qi

    Bioresource Technology   Vol. 173   page: 462   2014

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    Language:English   Publishing type:Research paper (scientific journal)  

  63. Development of chemical CO2 solvent for high-pressure CO2 capture Reviewed

    Shin Yamamoto, Hiroshi Machida, Yuichi Fujioka, Takayuki Higashii

    Energy Procedia   Vol. 37   page: 505-517   2013

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  64. Green chemical processes with supercritical fluids: Properties, materials, separations and energy Reviewed

    Hiroshi Machida, Masafumi Takesue, Richard L. Smith Jr.

    The Journal of Supercritical Fluids   Vol. 60 ( SI ) page: 2-15   2011.12

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.supflu.2011.04.016

  65. Correlation of supercritical CO2-ionic liquid vapor-liquid equilibria with the e*-modified Sanchez-Lacombe equation of state Reviewed

    Masayuki Iguchi, Hiroshi Machida, Yoshiyuki Sato and Richard L. Smith, Jr.

    ASIA-PACIFIC JOURNAL OF CHEMICAL ENGINEERING   Vol. 7   page: S95-S100   2011.10

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  66. Infinite dilution partition coefficients of benzene derivative compounds in supercritical carbon dioxide + ionic liquid systems: 1-butyl-3-methylimidazolium chloride [bmim][Cl], 1-butyl-3-methylimidazolium acetate [bmim][Ac] and 1-butyl-3-methylimidazolium octylsulfate [bmim][OcSO4] Reviewed

    Yuya Hiraga, Wataru Endo, Hiroshi Machida, Yoshiyuki Sato, Taku Michael Aida, Masaru Watanabe, Richard L. Smith Jr.

    The Journal of Supercritical Fluids     2011.8

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.supflu.2011.08.003,

  67. Simple modification of the temperature dependence of the Sanchez-Lacombe equation of state Reviewed

    Hiroshi Machida, Yoshiyuki Sato, Richard L. Smith Jr.

    Fluid Phase Equilibria   Vol. 297 ( 2 ) page: 25   2010.10

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

  68. Ionic liquid structural effects on solute partitioning in biphasic ionic liquid and supercritical carbon dioxide systems Reviewed

    Hiroshi Machida, Toru Kawasumi, Wataru Endo, Yoshiyuki Sato, Richard L. Smith Jr.

    Fluid Phase Equilibria   Vol. 294 ( 1-2 ) page: 15   2010.7

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

  69. Measurement and correlation of high pressure densities of ionic liquids, 1-ethyl- 3-methylimidazolium L-lactate ([emim][Lactate]), 2-hydroxyethyl-trimethylammonium L-lactate ([(C2H4OH)(CH3)3N][Lactate]), and 1-butyl-3- methylimidazolium chloride ([bmim][Cl]) Reviewed

    Hiroshi Machida, Ryosuke Taguchi, Yoshiyuki Sato and Richard L. Smith, Jr.

    Journal of Chemical & Engineering Data   Vol. 56 ( 4 ) page: 923-928   2010

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

  70. Analysis of ionic liquid PVT behavior with a Modified Cell Model Reviewed

    Hiroshi Machida, Ryosuke Taguchi, Yoshiyuki Sato, Richard L. Smith Jr.

    Fluid Phase Equilibria   Vol. 281 ( 2 ) page: 25   2009.7

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

  71. High-Pressure Densities of 1-Alkyl-3-methylimidazolium Hexafluorophosphates and 1-Alkyl-3-methylimidazolium Tetrafluoroborates at Temperatures from (313 to 473) K and at Pressures up to 200 MPa Reviewed

    Ryosuke Taguchi, Hiroshi Machida, Yoshiyuki Sato and Richard L. Smith, Jr.

    Journal of Chemical & Engineering Data   Vol. 54 ( 1 ) page: 22   2009

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    Language:English   Publishing type:Research paper (scientific journal)  

  72. Measurement and correlation of supercritical CO2 and ionic liquid systems for design of advanced unit operations Reviewed

    Hiroshi Machida, Ryosuke Taguchi, Yoshiyuki Sato, Louw J. Flourusse, Cor J. Peters, Richard L. Smith, Jr.

    Frontiers of Chemical Engineering in China   Vol. 3 ( 1 ) page: 12   2009

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  73. Pressure-volume-temperature (PVT) measurements of ionic liquids ([bmim+][PF6 -], [bmim+][BF4 -], [bmim+][OcSO4 -]) and analysis with the Sanchez-Lacombe equation of state Reviewed

    Hiroshi Machida, Yoshiyuki Sato, Richard L. Smith Jr.

    Fluid Phase Equilibria   Vol. 264 ( 1-2 ) page: 1   2008.3

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

  74. Measurement and correlation of infinite dilution partition coefficients of aromatic compounds in the ionic liquid 1-butyl-3-methyl-imidazolium hexafluorophosphate ([bmim][PF6])-CO2 system at temperatures from 313 to 353 K and at pressures up to 16 MPa Reviewed

    Hiroshi Machida, Yoshiyuki Sato, Richard L. Smith Jr.

    The Journal of Supercritical Fluids   Vol. 43 ( 3 ) page: 430   2008

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

▼display all

Books 15

  1. カーボンニュートラルへの化学工学

    化学工学会( Role: Joint author ,  CO2の分離回収)

    丸善出版  2023.1 

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    Language:Japanese

  2. 化学工学誌87巻10号「年鑑」

    ( Role: Joint author)

    2022.10 

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    Language:Japanese

  3. CO2分離回収貯留及び有効利用技術

    ( Role: Joint author ,  第2項 吸収液による物理吸収法)

    2022.6 

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    Language:Japanese

  4. 化学技術のフロンティアシリーズ① サーキュラー・バイオエコノミーを支える分離技術

    ( Role: Contributor)

    学術研究出版  2022.2 

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    Language:Japanese

  5. 脱炭素への工学

    ( Role: Contributor)

    三恵社  2021.12 

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    Language:Japanese

  6. 水素を用いた省エネルギーCO2回収技術

    町田 洋・柳瀬 慶一・チャン クウィン・山口 毅・則永 行庸( Role: Joint author)

    クリーンエネルギー   2020.10 

  7. メタネーション大規模実証に向けた 基盤研究およびCO2分離回収と 利用の統合プロセスに関する研究開発

    則永行庸、張煒、チェチョルヨン 柳瀬慶一、チャンクウィン、町田洋

    2020.7 

  8. CO2循環利用に向けたCO2回収プロセス

    町田洋, 江﨑丈裕,山口毅, 則永行庸

    分離技術  2019 

  9. 相分離型吸収剤を用いた省エネルギーCO2分離回収プロセスに関して

    町田洋 江﨑丈裕 山口毅

    シンポジウムシリーズ第2集「分離技術のシーズとライセンス技術の実用化」  2018.3 

  10. 相分離を利用した二酸化炭素の 省エネルギー分離技術

    町田 洋・江﨑丈裕・山口 毅

    化学工業  2018.2 

  11. 相分離型CO2 吸収剤の開発

    町田洋, 江﨑丈裕,山口毅, 則永行庸

    分離技術  2017 

  12. 水熱爆砕による草木質系バイオマスの糖化前処理技術

    町田 洋, 堀添 浩俊( Role: Joint author)

    2012 

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    Language:Japanese

  13. Novel AmineSolution Development for High Pressure CO2 Capture and Application Examination to IGCC Gas

    Shin Yamamoto, Hiroshi Machida, Yuichi Fujioka, Takayuki Higasii, Shingo Kazama( Role: Sole author)

    Amirican Chemical Society  2012 

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    Language:Japanese

  14. イオン液体を用いた分離精製技術の現状と展開

    町田 洋・金久保 光央( Role: Joint author)

    化学工学  2011.7 

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    Language:Japanese

  15. CO2共存下でのイオン液体のマクロ物性

    町田 洋・佐藤 善之・R. L. SMITH, JR.( Role: Joint author)

    化学工学  2011.6 

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    Language:Japanese

▼display all

Presentations 43

  1. CO2吸収液開発を加速するハイスループット物性測定に関して Invited

    町田 洋

    化学工学会 第89年会   化学工学会

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    Event date: 2024.3

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:大阪公立大学 中百舌鳥キャンパス   Country:Japan  

  2. Technical Issues of Hydrogen and CCS Invited International conference

    Hiroshi MACHIDA

    On the Road to Net Zero: Technical and Social Issues of Clean Hydrogen  2024.3.15 

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    Event date: 2024.3

    Language:English   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  3. Energy-Efficient CO2 Capture with Phase Separation Solvent Invited International coauthorship International conference

    Hiroshi Machida

    2023 TwIChE meeting  2023.12.9  TwIChE

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    Event date: 2023.12

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:National Taiwan University   Country:Taiwan, Province of China  

  4. 水素ストリッピングを活用したCO2分離回収の省エネ化 Invited

    町田洋

    日本膜学会「第45年会」・「膜シンポジウム2023」合同大会  日本膜学会

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    Event date: 2023.11

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:早稲田大学リサーチイノベーションセンター   Country:Japan  

  5. 吸収液法に依るCO2分離回収 Invited

    町田 洋

    『カーボンニュートラルへの化学工学』出版記念シンポジウム  2023.5.25  化学工学会東海支部

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    Event date: 2023.5

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:名古屋大学 野依記念学術交流館   Country:Japan  

  6. プロセス統合によるCO2回収・有効利用の省エネルギー化 Invited

    町田 洋

    CO2有効利用カーボンリサイクルに関する技術開発と事業動向展望  技術情報センター

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    Event date: 2023.4

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:東京 新お茶の水連合会館   Country:Japan  

  7. 相分離型CO2吸収液および水素ストリッピング再生技術の開発 Invited

    蒸留フォーラム2023 

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    Event date: 2023.2

    Presentation type:Symposium, workshop panel (nominated)  

  8. CO 2 分離回収技術の材料とプロセスからの省エネ化検討 Invited

    町田 洋

    超臨界流体部会 第 2 1 回 サマースクール  

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    Event date: 2022.9

    Presentation type:Symposium, workshop panel (public)  

    Country:Japan  

  9. 相分離型吸収剤の開発と CO2 分離回収への応用 Invited

    町田 洋

    技術情報協会 CO2 分離回収へ向けたアミンの反応機構とその活用  技術情報協会

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    Event date: 2022.6

    Presentation type:Public lecture, seminar, tutorial, course, or other speech  

    Country:Japan  

  10. EasyMaxとReactIRによるCO2吸収液のリアルタイムモニタリング Invited

    町田洋

    メトラートレド ライブウェビナー 自動合成装置とIn Situ分析 

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    Event date: 2022.2

    Presentation type:Oral presentation (invited, special)  

  11. 化学・物理吸収法による CO2分離回収 Invited

    町田洋

    化学工学会進歩講習会 

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    Event date: 2021.12

    Presentation type:Public lecture, seminar, tutorial, course, or other speech  

  12. 今、注目される CO2 の分離回収と有効利用 Invited

    町田洋

    東海化学工業会セミナー CO2 削減に関する研究開発の最前線 

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    Event date: 2021.11

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

  13. CO2 capture with hybrid absorption-sublimation system: Cryo-Capture International conference

    Hiroshi Machida

    PCCC6 IEAGHG 6th Post Combustion Capture Conference 

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    Event date: 2021.10

    Presentation type:Oral presentation (general)  

  14. High Throughput CO2 Solubility Measurement in Amine Solution using HS-GC International conference

    Hiroshi Machida

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    Event date: 2021.9

    Presentation type:Oral presentation (general)  

  15. 相分離型CO2吸収剤の評価に向けた装置・モデル開発 Invited

    町田洋

    技術情報協会 二酸化炭素の分離材料と回収技術の開発 

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    Event date: 2021.8

    Presentation type:Oral presentation (invited, special)  

  16. CO2回収の現状と将来 Invited

    町田洋

    人とくるまのテクノロジー展2021名古屋 

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    Event date: 2021.6 - 2021.7

    Presentation type:Oral presentation (invited, special)  

  17. 水素を用いた省エネルギーCO2回収と有効利用技術開発

    町田洋

    技術情報センター「CO2有効利用技術と開発・事業動向」 

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    Event date: 2021.2

  18. 新規開発吸収液の物性測定、モデル化及びプロセス解析に関して

    町田洋

    化学工学会CCUS研究会セミナー「CO2分離回収プロセスのモデル化・コスト評価」 

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    Event date: 2020.12

  19. Integrated Process for CO2 Capture and Utilization using Phase Separation Solvent

    Hiroshi Machida

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    Event date: 2020.10

  20. Improvement of energy efficiency in carbon dioxide capture by phase separation solvent

    Hiroshi Machida

    International Symposium on Innovative Materials and Processes in Energy Systems IMPRES2019 

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    Event date: 2019.10

  21. Reducing energy required for CO<inf>2</inf> separation and recovery process by employing phase separation solvents

    Norinaga K.

    36th Annual International Pittsburgh Coal Conference: Clean Coal-Based Energy/Fuels and the Environment, PCC 2019 

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    Event date: 2019

    Language:English   Presentation type:Oral presentation (general)  

    Scopus

  22. An approach for quantifying transferable hydrogen in pyrolyzing coals

    Norinaga K.

    36th Annual International Pittsburgh Coal Conference: Clean Coal-Based Energy/Fuels and the Environment, PCC 2019 

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    Event date: 2019

    Language:English   Presentation type:Oral presentation (general)  

    Scopus

  23. Development of energy-saving CO2 capture process using phase separation solvent International conference

    Hiroshi Machida, Esaki Takehiro, Tsuyoshi Yamaguchi, Koyo Norinaga, Akira Kishimoto, Akira Matsuoka, Katsuya Akiyama, Makoto Nishimura

    ICSST2017 

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    Event date: 2017.11

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  24. Study on energy consumption of CO2 capture process with phase separation solvents International conference

    Takehiro Esaki, Hiroshi Machida, Ryuya Ando, Tsuyoshi Yamaguchi and Koyo Norinaga

    ICMaSS2017 

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    Event date: 2017.9

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  25. CO2 capture with phase separation type solvent International conference

    Hiroshi Machida, Esaki Takehito, Tsuyoshi Yamaguchi, Koyo Norinaga

    ICCS&T 2017 

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    Event date: 2017.9

    Language:English   Presentation type:Oral presentation (general)  

    Venue: Beijing   Country:Japan  

  26. 相分離型CO2吸収液の輸送物性

    安藤竜也、山口毅、髙見誠一、江崎丈裕、町田洋、則永行庸

    化学工学会第49回秋季大会 

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    Event date: 2017.9

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  27. Experimental Evaluation of CO2 absorption rate with Amine-H2O-Ether absorbents International conference

    Takehiro Esaki, Hiroshi Machida, Tatuya Ando, Tsuyoshi Yamaguchi, Koyo Norinaga

    The 17th APCChE 

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    Event date: 2017.8

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Hong Kong   Country:Japan  

  28. 相分離型CO2吸収材を用いた吸収速度の実験評価

    江崎 丈裕,安藤 竜也,山口 毅,堀添 浩俊,町田 洋

    第 22 回動力・エネルギー技術シンポジウム 

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    Event date: 2017.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  29. 二液相分離型吸収法による CO2 回収装置の提案とその実証評価

    江崎丈裕, 山口毅, 町田洋, 則永行庸

    分離技術会年会 2017 

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    Event date: 2017.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:明治大学理工学部 生田キャンパス   Country:Japan  

  30. Evaluation of Consumption Energy in CO2 Absorption Processes with Two-Liquid Phase Separation Type Invited International conference

    Takehiro Esaki, Hiroshi Machida, Hirotoshi Horizoe and Tsuyoshi Yamaguchi

    2016 AIChe Annual Meeting 

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    Event date: 2016.11

    Language:English   Presentation type:Oral presentation (general)  

    Country:United States  

  31. Phase separation solvent for CO2 capture International conference

    Hiroshi Machida, Takehiro Esaki, Kazuki Oba, Takashi Tomikawa, Tsuyoshi Yamaguchi, Hirotoshi Horizoe

    13th Conference on Greenhouse Gas Control Technologies (GHGT) 

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    Event date: 2016.11

    Language:English   Presentation type:Oral presentation (general)  

    Country:Switzerland  

  32. CO2 solubility of phase separation CO2 capture solvent International conference

    Hiroshi Machida, Kazuki Oba, Tsuyoshi Yamaguchi, Hirotoshi Horizoe

    ATPC2016 | The 11th Asian Thermophysical Properties Conference 

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    Event date: 2016.10

    Language:English   Presentation type:Poster presentation  

    Venue:Pacifico YOKOHAMA Annex Hall   Country:Japan  

  33. 相分離型吸収液中のCO2溶存形態と平衡物性の研究 International conference

    安藤竜也、山口毅、江崎丈裕、堀添浩俊、町田洋

    化学工学会 第48秋季大会 

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    Event date: 2016.9

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  34. 相分離型CO2吸収剤の探索および平衡物性測定 Invited

    町田洋、富川隆志、山口毅、堀添浩俊

    分離技術会 年会2016 

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    Event date: 2016.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:日本大学生産工学部津田沼キャンパス   Country:Japan  

  35. 亜臨界ブタン溶媒抽出法によるバイオブタノール濃縮脱水技術の開発

    町田洋、渡部彰夫、中田直貴、堀添浩俊

    分離技術会 年会2016 

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    Event date: 2016.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  36. ブタン・エタノール・水・微量不純物系における高圧相平衡基礎研究

    中田 直貴、町田 洋、堀添 浩俊

    分離技術会 年会2015 

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    Event date: 2015.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  37. 相転移を利用したCO2分離吸収剤の探索研究 International conference

    町田 洋、富川 隆志、堀添 浩俊

    分離技術会 年会2015 

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    Event date: 2015.5

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  38. Energy-saving bioethanol dehydration with extractive distillation International conference

    Hiroshi Machida, Miyoshi Kengo, Hirotoshi Horizoe

    Grand Renewable Energy 2014 

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    Event date: 2014.7

    Language:English   Presentation type:Poster presentation  

    Country:Japan  

  39. 超亜臨界プロパンによる藻類からの精製油回収技術

    町田 洋、堀添 浩俊

    第3回 JACI/GSCシンポジウム 

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    Event date: 2014.5

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  40. 水熱酸化反応によるバイオエタノール蒸留廃水の無害化研究

    藤根涼、町田 洋、堀添 浩俊

    第3回 JACI/GSCシンポジウム 

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    Event date: 2014.5

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  41. Biomass pretreatment with hydrothermal decomposition for bioethanol production International conference

    H. Machida, Y. Honda, M. Saito, T. Hasegawa, H. Horizoe

    ISETS'13 

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    Event date: 2013.12

    Language:English   Presentation type:Poster presentation  

    Country:Japan  

  42. Bioethanol dehydration with an extractive distillation process using butane International conference

    Hiroshi Machida, Kentaro Matsumura, Reisa Ohashi and Horizoe Hirotoshi

    MTMS'12 (The 6th international symposium on "Molecular Thermodynamics and Molecular Simulation") 

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    Event date: 2012.9

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  43. ブタン溶剤を用いたバイオエタノール濃縮脱水省エネルギー化

    町田洋、松村健太郎、堀添浩俊

    化学工学会 第44回秋季大会 

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    Event date: 2012.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

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Research Project for Joint Research, Competitive Funding, etc. 6

  1. 水素で二酸化炭素を効率回収

    2021.11 - 2022.10

    異能vationプログラム「破壊的な挑戦部門」 

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    Authorship:Principal investigator 

  2. 未利用冷熱による燃焼ガス中CO2の回収技術の開発

    2020.6 - 2022.3

    NEDO先導研究プログラム/エネルギー・環境新技術先導研究プログラム 

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    Authorship:Principal investigator 

  3. Energy-saving CO2 Capture Process with Phase Separation Solvent

    2018.11 - 2022.3

    Advanced Low CarbonTechnology Research and Development Program 

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    Grant type:Competitive

  4. Energy-saving CO2 Capture Process with Phase Separation Solvent

    2015.10 - 2019.3

    Advanced Low CarbonTechnology Research and Development Program 

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    Grant type:Competitive

  5. 亜臨界ブタン溶媒抽出法によるバイオブタノール濃縮脱水技術の開発

    2015.10 - 2016.9

    マッチングプランナー 

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    Grant type:Competitive

  6. 水熱爆砕と固体酸の併用によるバイオマスの高効率糖化技術の開発

    2012.11 - 2013.10

    JST A-STEP 

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    Grant type:Competitive

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KAKENHI (Grants-in-Aid for Scientific Research) 2

  1. 有機廃棄物再生プロセスの革新に向けた複雑反応解析基盤の確立

    Grant number:22H00570  2022.4 - 2027.3

    科学研究費助成事業  基盤研究(A)

    則永 行庸, 平山 幹朗, 町田 洋, 福本 一生

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    Authorship:Coinvestigator(s) 

    有機廃棄物(林地残材、農業廃棄物、可燃ごみ、廃プラスチック等)のエネルギー・物質
    リサイクルの限界までの高効率化を実現するために、廃棄物熱化学転換特性を高精度に机
    上予測するための「複雑反応解析基盤」を確立する。多種多様な廃棄物原料の熱化学転換反応を統一的に予測できる反応速度モデルを構築する。次いで、詳細な化学反応と伝熱・流動数値解析を統合した反応器内現象の高精度シミュレーションによって、現象を深層まで理解する手法を確立する。さらに、この従来型の順解析の追究がもたらす反応器内現象の通暁を逆解析し、最適反応器設計のための工学的手法へと止揚させる。

  2. 相分離型二酸化炭素吸収剤の吸収速度論のモデル化

    2016.4 - 2017.3

    科学研究費補助金  若手研究(B)

    町田 洋

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    Authorship:Principal investigator 

 

Teaching Experience (On-campus) 26

  1. Seminars on Chemical Systems Engineering 2E

    2023

  2. Seminars on Chemical Systems Engineering 2C

    2023

  3. Seminars on Chemical Systems Engineering 2A

    2023

  4. Advanced Experiments and Exercises on Chemical Systems 2

    2023

  5. Advanced Experiments and Exercises on Chemical Systems 1

    2023

  6. Advanced Chemical Reaction Engineering

    2023

  7. Seminars on Chemical Systems Engineering 1C

    2023

  8. Seminars on Chemical Systems Engineering 1A

    2023

  9. Seminars on Chemical Systems Engineering 2D

    2023

  10. Seminars on Chemical Systems Engineering 2B

    2023

  11. Seminars on Chemical Systems Engineering 1D

    2023

  12. Seminars on Chemical Systems Engineering 1B

    2023

  13. Physical Chemistry 4

    2023

  14. Heat Transfer and Diffusion

    2023

  15. 先端物理化学演習1

    2023

  16. 先端物理化学演習2

    2023

  17. 学生実験1

    2023

  18. 学生実験2

    2023

  19. 学生実験2

    2022

  20. 学生実験1

    2022

  21. 先端物理化学演習2

    2022

  22. 先端物理化学演習1

    2022

  23. 学生実験2

    2021

  24. 学生実験1

    2021

  25. 先端物理化学演習2

    2021

  26. 先端物理化学演習1

    2021

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Social Contribution 1

  1. 第23 回「化学工学物性定数の最近の動向」講演会

    2013.7

Media Coverage 2

  1. 再エネ水素を使って高効率にCO2を回収、名古屋大 Newspaper, magazine

    メガソーラービジネス  2020.6

  2. 名大、水素を用いた省エネルギーCO2回収技術を開発 Newspaper, magazine

    日本経済新聞  2020.6