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Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received August 30, 2006
Accepted October 25, 2006

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Hydrogasification of various carbonaceous sources using pressure change properties

Wang Seog Cha^† Il Hyun Baek¹ Hyun Tae Jang²

Kunsan National University, Kunsan 573-701, Korea ¹Korea Institute of Energy Research, Daejeon 305-343, Korea ²Hanseo University, Seosan 356-706, Korea

wscha@kunsan.ac.kr

Korean Journal of Chemical Engineering, May 2007, 24(3), 532-536(5), 10.1007/s11814-007-0094-7

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Abstract

Hydrogasification experiments were carried out in a batch reactor capable of operating at 800 ℃ and 8MPa. Carbonaceous matters used in the experiments were bituminous and anthracite coal and sawdust. It was found that the decreasing rate of hydrogen gas pressure was closely related to the rate of gas production. This result was confirmed by the change of char conversion. The methane content in the gas products and char conversion rose with the increase of temperature and pressure. The addition of water activated the hydrogasification reaction until the proper level of water amount (up to 30 wt%), but an excess level of water inhibited the reaction. The activation energy of bituminous coal and sawdust char obtained by the Arrhenius plot was 187 KJ/mole and 77 KJ/mole, respectively. In case of loading of catalysts, all catalysts loaded to the char did not give a positive effect in hydrogasification, but the catalytic effect depended on type of catalyst metals and char. In the present hydrogasification of bituminous coal and sawdust, the order of activities for the catalysts tested was K2CO3>Na2CO3>Fe(NO3)2>Ni(NO3)2>FeSO4.

Keywords

Hydrogasification Gas Composition Pressure Decrease Char Conversion Catalyst

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