研究者詳細 - 則永　行庸

論文 - 則永　行庸

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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 査読有り Open Access

Matoba, M; Kudo, S; Mori, A; Norinaga, K; Uchida, K; Dohi, Y; Uebo, K; Hayashi, J

ISIJ INTERNATIONAL 59 巻 ( 8 ) 頁： 1440 - 1448 2019年

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：ISIJ International

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 1 000°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 600-1 000°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

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

Fukuoka, T; Takeda, N; Zhang, L; Machida, H; Zhang, W; Watanabe, M; Nishibata, Y; Hayashi, J; Norinaga, K

ISIJ INTERNATIONAL 59 巻 ( 8 ) 頁： 1376 - 1381 2019年

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：ISIJ International

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 査読有り Open Access

Uchida, K; Kudo, S; Mori, A; Ashik, UPM; Norinaga, K; Dohi, Y; Uebo, K; Hayashi, J

ISIJ INTERNATIONAL 59 巻 ( 8 ) 頁： 1449 - 1456 2019年

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：ISIJ International

Sequential coal briquetting and carbonization was applied to preparation of cokes from 9 non- or slightly caking coals with carbon contents (f<inf>C</inf>) 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 f<inf>C</inf> 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

An approach for quantifying transferable hydrogen in pyrolyzing coals 査読有り

Norinaga K

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

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

Norinaga K

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

An approach for quantifying transferable hydrogen in pyrolyzing coals 査読有り

Norinaga K

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

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

Norinaga K

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

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

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

International Journal of Coal Science and Technology 5 巻 ( 4 ) 頁： 452 - 463 2018年12月

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：International Journal of Coal Science and Technology

Strict relation between the substituents or functional groups attached to the coal macromolecules and the generation of the volatile products, e.g., CH<inf>4</inf>, H<inf>2</inf>O, CO, CO<inf>2</inf>, etc., during the coal pyrolysis is an important but confusing subject. In this paper, quadrupole mass spectrometry, gas chromatography, and <sup>13</sup>C nuclear magnetic resonance are applied to real-time monitoring the formations of volatile products, off-line quantitative determination of the total products from the pyrolysis of a sub-bituminous coal (SC), and the changes of diverse substitents in the SC along with coke foamation, respectively. These measurements are also performed for the pyrolysis of a caking coal to contrast SC. The qualitative and quantitative data reveal that, during coal pyrolysis, the functional groups related with the formation of CO, i.e., ether, carbonyl, and anhydride, can directly generate CO via bond breaking, or take a detour of the formation of other intermediates via condensation and recombination firstly. Moreover, the formations of CO<inf>2</inf> and CH<inf>4</inf> are related to the direct removal of -COO- and -CH<inf>3</inf>, respectively.

DOI： 10.1007/s40789-017-0175-0

Open Access

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

Yang, HM; Norinaga, K; Li, J; Zhu, WY; Wang, HJ

FUEL PROCESSING TECHNOLOGY 181 巻頁： 207 - 214 2018年12月

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：Fuel Processing Technology

This study aimed to experimentally investigate the effect of HZSM-5 on the distribution of volatile products, especially carbon monoxide (CO), C<inf>1</inf>–C<inf>5</inf> hydrocarbons and aromatic hydrocarbons (AHs) during catalytic pyrolysis of lignin and lignin model compounds. Catechol was pyrolyzed using a two-stage tubular reactor (TS-TR) connected to a gas chromatography system over HZSM-5 at 550–950 °C. Forty-three products, including four inorganic gases, twenty C<inf>1</inf>–C<inf>5</inf> hydrocarbons, and nine AHs were quantified using three GC-columns. Results indicated that HZSM-5 accelerated the catechol conversion with a large amount of CO and AHs produced. C<inf>1</inf>–C<inf>5</inf> hydrocarbons were formed during non-catalytic pyrolysis of model compounds, and consumed quickly during HZSM-5 catalytic pyrolysis of catechol. Catalytic pyrolysis of phenol, guaiacol and syringol was carried out at 650 °C in the TS-TR over HZSM-5. HZSM-5 obviously promoted the conversion of lignin model compounds, and largely increased the yield of volatile products especially CO and AHs. Three lignin samples were also catalytically pyrolyzed over HZSM-5 in the TS-TR at 650 °C. HZSM-5 increased the yield of C<inf>2</inf>-C<inf>3</inf> hydrocarbons and AHs, and reduced the yield of oxygenated compounds. HZSM-5 could promote the formation of AHs (lower than 10 wt%) during lignin pyrolysis, but not as obviously as during model compounds pyrolysis (higher than 19 wt%). High yields of char and tar would account for the low catalytic efficiency of HZSM-5 during lignin pyrolysis.

DOI： 10.1016/j.fuproc.2018.09.022

Web of Science

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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 176 巻頁： 107-115 2018年2月

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 122 巻 ( 3 ) 頁： 822-831 2018年1月

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 212 巻頁： 515-522 2018年1月

Current situation and future scope of biomass gasification in Japan 査読有り

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

Evergreen 4 巻 ( 4 ) 頁： 24-29 2017年12月

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 121 巻 ( 44 ) 頁： 8495-8503 2017年11月

An approach for on-line analysis of multi-component volatiles from coal pyrolysis with Li+ -attachment ionization mass spectrometry 査読有り

Zhang Lu, Qi Shi-Chao, Iwanaga Keita, Uemura Kazuhiro, Zhang Li-Xin, Kudo Shinji, Hayashi Jun-ichiro, Furuya Kenji, Norinaga Koyo

FUEL PROCESSING TECHNOLOGY 158 巻頁： 141-145 2017年4月

Theoretical Study on Hydrogenolytic Cleavage of Intermonomer Linkages in Lignin 査読有り

Qi Shi-Chao, Zhang Lu, Kudo Shinji, Norinaga Koyo, Hayashi Jun-ichiro

JOURNAL OF PHYSICAL CHEMISTRY A 121 巻 ( 15 ) 頁： 2868-2877 2017年4月

Theoretical Study on Reaction Pathways Leading to CO and CO2 in the Pyrolysis of Resorcinol 査読有り

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

JOURNAL OF PHYSICAL CHEMISTRY A 121 巻 ( 3 ) 頁： 631-637 2017年1月

Production of Levoglucosenone and Dihydrolevoglucosenone by Catalytic Reforming of Volatiles from Cellulose Pyrolysis Using Supported Ionic Liquid Phase 査読有り

Kudo Shinji, Goto Nozomi, Sperry Jonathan, Norinaga Koyo, Hayashi Jun-ichiro

ACS SUSTAINABLE CHEMISTRY & ENGINEERING 5 巻 ( 1 ) 頁： 1132-1140 2017年1月

Toward Low-Temperature Coal Gasiication: Experimental and Numerical Studies of Thermochemical Coal Conversion Considering the Interactions between Volatiles and Char Particles 査読有り Open Access

Li Cheng-Yi, Zhang Li-Xin, Kudo Shinji, Hayashi Jun-Ichiro, Norinaga Koyo

KONA POWDER AND PARTICLE JOURNAL ( 34 ) 頁： 70-79 2017年

Nano-sized nickel catalyst for deep hydrogenation of lignin monomers and first-principles insight into the catalyst preparation 査読有り

Qi Shi-Chao, Zhang Lu, Einaga Hisahiro, Kudo Shinji, Norinaga Koyo, Hayashi Jun-ichiro

JOURNAL OF MATERIALS CHEMISTRY A 5 巻 ( 8 ) 頁： 3948-3965 2017年

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