Faculty Profiles - NORINAGA Koyo

Papers - NORINAGA Koyo

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Computational fluid dynamics simulation of CO2 methanation in a shell-and-tube reactor with multi-region conjugate heat transfer Reviewed

Zhang Wei, Machida Hiroshi, Takano Hiroyuki, Izumiya Koichi, Norinaga Koyo

CHEMICAL ENGINEERING SCIENCE Vol. 211 2020.1

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

Machida, H., Ando, R., Esaki, T., Yamaguchi, T., Norinaga, K.

Journal of Molecular Liquids Vol. 292 2019.10

Quantitative Description of Catalysis of Inherent Metallic Species in Lignite Char during CO2 Gasification Reviewed

Halim Nurulhuda, Ashik U. P. M, Gao Xiangpeng, Kudo Shinji, Sanwani Edy, Norinaga Koyo, Hayashi Jun-ichiro

ENERGY & FUELS Vol. 33 ( 7 ) page： 5996 - 6007 2019.7

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

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

Language：English Publishing type：Research paper (scientific journal) Publisher：The Iron and Steel Institute of Japan

Chemical structure of coal is evolutionary changed during pyrolysis that accompanies gas release. The chemical structural change and gas formation profiles play important roles in determining caking property and physical properties such as strength and size of the resultant coke. However, analyses of volatile components and structural analysis of solid char have been mostly performed individually, and it is difficult to combine both and to obtain quantitative understanding on the thermal decomposition of coal at mechanistic level. In this study, simultaneous analyses of solid chemical structures of the heat treated coals and gas formation profiles were conducted for two kinds of coals that were pyrolyzed at an identical condition. On-line gas analysis with a quadrupole mass spectrometer and spectroscopic methods (NMR and FT-IR) were employed for quantitative evaluation of gas formation characteristics and solid chemical structure, respectively. The information obtained were then integrated to acquire new insight for coal pyrolysis mechanism. Here an approach to quantify the transferable hydrogen that contributes to stabilize radicals formed in pyrolyzing coal was proposed. It includes the quantitative assessment of aromatic cluster growth, decomposition of hydroxyls, and releases of hydrogen and pyrolytic water into gas phase. The proposed approach suggested that a bituminous coal that exhibits plasticity during pyrolysis had 3.5 mol/kg-coal transferable hydrogen, whereas the amount of transferable hydrogen of the sub-bituminous coal, a non-caking coal, was 1.3 mol/kg-coal, during pyrolysis up to 500°C.

DOI： 10.2355/isijinternational.ISIJINT-2018-816

Production of High-strength Cokes from Non-and Slightly Caking Coals. Part II: Application of Sequence of Fine Pulverization of Coal, Briquetting and Carbonization to Single Coals and Binary Blends Reviewed Open Access

Uchida Kenya, Kudo Shinji, Mori Aska, Ashik U. P. M, Norinaga Koyo, Dohi Yusuke, Uebo Kazuya, Hayashi Jun-ichiro

ISIJ INTERNATIONAL Vol. 59 ( 8 ) page： 1449 - 1456 2019

Language：English Publishing type：Research paper (scientific journal) Publisher：The Iron and Steel Institute of Japan

Sequential coal briquetting and carbonization was applied to preparation of cokes from 9 non- or slightly caking coals with carbon contents (fC) of 67–85 wt%-daf. Coal pulverization to sizes of <106 µm and briquetting at 40°C enabled to prepare cokes with tensile strength (σ) over 10 MPa from 4 coals with fC of 82–85 or 67 wt%-daf. Then, by introducing fine pulverization to sizes of < 10 µm before the briquetting, 7 coals were converted successfully into cokes with σ = 11–25 MPa. Increasing the briquetting temperature to 240°C further increased σ to 19–35 MPa for all the 9 coals. It was thus demonstrated that the hot briquetting of finely pulverized coal was a method to prepare high strength coke regardless of the rank of parent coal. Cokes were also prepared from 14 binary coal blends. All the cokes prepared by applying the fine pulverization and hot briquetting had σ of 20–35 MPa, which agreed well with that calculated by weighted average of those from the component coals. On the other hand, positive and also negative synergistic effects of blending occurred when blends were briquetted at 40°C. Characteristics of bonding/coalescence among particles of different types of coals were responsible for such synergies.

DOI： 10.2355/isijinternational.ISIJINT-2018-847

Production of High-strength Cokes from Non-/Slightly Caking Coals. Part I: Effects of Coal Pretreatment and Variables for Briquetting and Carbonization on Coke Properties Reviewed Open Access

Matoba Masahiro, Kudo Shinji, Mori Aska, Norinaga Koyo, Uchida Kenya, Dohi Yusuke, Uebo Kazuya, Hayashi Jun-ichiro

ISIJ INTERNATIONAL Vol. 59 ( 8 ) page： 1440 - 1448 2019

Language：English Publishing type：Research paper (scientific journal) Publisher：The Iron and Steel Institute of Japan

In continuation of the present authors’ studies on production of high strength coke from lignite by sequential binderless hot briquetting and carbonization, this study has been carried out aiming at proposing methods to produce high strength coke from non-/slightly caking coals of subbituminous to bituminous rank. This paper firstly demonstrates preparation of cokes with cold tensile strengths above 10 MPa from two single non-caking coals (particle size; < 106 µm) by applying briquetting at temperature and mechanical pressure of over 200°C and 100 MPa, respectively. Such strength of coke is obtained over a wide range of heating rate, 3–30°C/min, during carbonization with final temperature of 1000°C. Then, a simple pretreatment, fine pulverization of coal to particle sizes smaller than 10 or 5 µm, is examined. This pretreatment enables to prepare coke with tensile strength even over 25 MPa, by decreasing porosity of resulting coke and more extensively the size of macropores simultaneously. The coke strength changes with carbonization temperature having a particular feature; significant development of strength at 600–1000°C, i.e., after completion of tar evolution, in which macropores and non-porous (dense) part of coke shrink in volume, inducing bonding and coalescence of particles and thereby arising the strength.

DOI： 10.2355/isijinternational.ISIJINT-2018-819

An approach for quantifying transferable hydrogen in pyrolyzing coals Reviewed

Norinaga K

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

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

Norinaga K

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

An approach for quantifying transferable hydrogen in pyrolyzing coals Reviewed

Norinaga K

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

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

Norinaga K

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

Characteristics of gas evolution profiles during coal pyrolysis and its relation with the variation of functional groups Reviewed Open Access

Zhang, L, Qi, S, Takeda, N, Kudo, S, Hayashi, J, Norinaga, K

International Journal of Coal Science and Technology Vol. 5 ( 4 ) page： 452 - 463 2018.12

Effects of HZSM-5 on volatile products obtained from the fast pyrolysis of lignin and model compounds Reviewed

Yang Huamei, Norinaga Koyo, Li Ji, Zhu Wenyou, Wang Haijun

FUEL PROCESSING TECHNOLOGY Vol. 181 page： 207 - 214 2018.12

Prediction of hot coke oven gas reforming by LES coupled with the extended flamelet/progress variable approach Reviewed

Panlong Yu, Koyo Norinaga, Hiroaki Watanabe, Toshiaki Kitagawa

Fuel Vol. 231 page： 234 - 243 2018.11

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

Large-eddy simulation (LES) coupled with the extended flamelet/progress variable approach (EFPV) has been performed to predict characteristics of reacting flows in a bench-scale hot coke oven gas (HCOG) reformer. In order to investigate the capability of capturing effects of operating conditions, simulations were carried out in two different cases in which the coke oven gas temperature and oxygen ratio were altered. Results showed that the LES coupled with the EFPV performed very well in terms of predicting temperature distribution as well as the temperature variation trend between the two cases. In addition, major species such as H2, CO, CO2, H2O and CH4, as well as minor species like benzene and some typical polycyclic aromatic hydrocarbons (PAH) were analyzed to illustrate their activities and dominant chemical events. With regards to the composition of the dry reformed gas, comparisons were made between the experimental data and the numerical simulation results, and reasonable results have been obtained. It has been confirmed that the general feature of the reacting flows in the HCOG reformer can be precisely captured by the present LES.

DOI： 10.1016/j.fuel.2018.05.104

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Characteristic Properties of Lignite to Be Converted to High-Strength Coke by Hot Briquetting and Carbonization Reviewed

Shinji Kudo, Aska Mori, Gentaro Hayashi, Takuya Yoshida, Noriyuki Okuyama, Koyo Norinaga, Jun-Ichiro Hayashi

Energy and Fuels Vol. 32 ( 4 ) page： 4364 - 4371 2018.4

Language：English Publishing type：Research paper (scientific journal) Publisher：American Chemical Society

A sequence of hot briquetting and carbonization (HBC) is a promising technology for the production of coke with a high mechanical strength from lignite, but factors affecting the coke strength have not yet been fully understood. The HBC cokes prepared from 12 lignites in this study showed diverse tensile strength (e.g., from 0.2 to 31.2 MPa in the preparation at 200 °C and 112 MPa for hot briquetting and 1000 °C for carbonization), and the coke strengths could not be explained by differences in commonly used structural properties of the parent lignites, such as elemental composition and contents of volatile matter/fixed carbon and ash. In this study, two methods were proposed for correlating the coke strength with the lignite properties, which employed the chemical structure analyzed by solid-state 13C nuclear magnetic resonance or the volumetric shrinkage during carbonization. A stronger coke was obtained from lignite that contained more aliphatic carbons (less aromatic carbons) or shrank more considerably. These characteristics contributed to intensified compaction of lignite in the briquetting and suppression of the formation of large pores, which are a cause of coke fracture. Two empirical equations, predicting the coke strength from the parameters of lignite properties, were established to be criteria for selection of lignite as HBC coke feedstock, although further investigation with more experimental data would be necessary for the validation.

DOI： 10.1021/acs.energyfuels.7b03155

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Computational Study on the Thermal Decomposition of Phenol-Type Monolignols Reviewed

Yuki Furutani, Yuki Dohara, Shinji Kudo, Jun-Ichiro Hayashi, Koyo Norinaga

International Journal of Chemical Kinetics Vol. 50 ( 4 ) page： 304 - 316 2018.4

Language：English Publishing type：Research paper (scientific journal) Publisher：John Wiley and Sons Inc.

A detailed chemical kinetic model has been developed to theoretically predict the pyrolysis behavior of phenol-type monolignol compounds (1-(4-hydroxyphenyl)prop-2-en-1-one, HPP
p-coumaryl alcohol, 3-hydroxy-1-(4-hydroxyphenyl)propan-1-one, HHPP
1-(4-hydroxyphenyl)propane-1,3-diol, HPPD) released from the primary heterogeneous pyrolysis of lignin. The possible thermal decomposition pathways involving unimolecular decomposition, H-addition, and H-abstraction by H and CH3 radicals were investigated by comparing the activation energies calculated at the M06–2X/6–311++G(d,p) level of theory. The results indicated that all phenol-type monolignol compounds convert to phenol by side-chain cleavage. p-Coumaryl alcohol decomposes into phenol via the formation of 4-vinylphenol, whereas HPP, HHPP, and HPPD decompose into phenol via the formation of 4-hydroxybenzaldehyde. The pyrolytic pathways focusing on the reactivity of the hydroxyl group in HPP and producing cyclopentadiene (cyc-C5H6) were also investigated. The transition state theory (TST) rate constants for all the proposed elementary reaction channels were calculated at the high-pressure limit in the temperature range of 300–1500 K. The kinetic analysis predicted the two favorable unimolecular decomposition pathways in HPP: the one is the dominant channel below 1000 K to produce cyc-C5H6, and the other is above 1000 K to yield phenol (C6H5OH).

DOI： 10.1002/kin.21164

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Transient three-dimensional simulation of densification process of carbon fibre preforms via chemical vapour infiltration of carbon matrix from methane

Tang Zhepeng, Li Aijun, Hatakeyama Tomo, Shuto Hiroki, Hayashi Jun-ichiro, Norinaga Koyo

CHEMICAL ENGINEERING SCIENCE Vol. 176 page： 107-115 2018.2

Theoretical Study on Elementary Reaction Steps in Thermal Decomposition Processes of Syringol-Type Monolignol Compounds

Furutani Yuki, Dohara Yuki, Kudo Shinji, Hayashi Jun-ichiro, Norinaga Koyo

JOURNAL OF PHYSICAL CHEMISTRY A Vol. 122 ( 3 ) page： 822-831 2018.1

Predicting molecular composition of primary product derived from fast pyrolysis of lignin with semi-detailed kinetic model

Furutani Yuki, Kudo Shinji, Hayashi Jun-ichiro, Norinaga Koyo

FUEL Vol. 212 page： 515-522 2018.1

Current situation and future scope of biomass gasification in Japan Reviewed

Furutani, Y, Norinaga, K, Kudo, S, Hayashi, J.-I, Watanabe, T

Evergreen Vol. 4 ( 4 ) page： 24-29 2017.12

Theoretical Study on the Kinetics of Thermal Decomposition of Guaiacol and Catechol

Furutani Yuki, Dohara Yuki, Kudo Shinji, Hayashi Jun-ichiro, Norinaga Koyo

JOURNAL OF PHYSICAL CHEMISTRY A Vol. 121 ( 44 ) page： 8495-8503 2017.11

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Papers - NORINAGA Koyo