Effect of Ca(OH)<sub>2</sub> catalyst on catalytic coal gasification and methanation

CHEN Zhao-hui; LIU Lei; WU Heng; PEI Zeng-kai; ZHAN Yue-ping; LI Ke-zhong; ZHENG Yan; WU Li-feng; BI Ji-cheng

Volume 44 Issue 10

Oct. 2016

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Article Navigation > Journal of Fuel Chemistry and Technology > 2016 > 44(10): 1160-1167

CHEN Zhao-hui, LIU Lei, WU Heng, PEI Zeng-kai, ZHAN Yue-ping, LI Ke-zhong, ZHENG Yan, WU Li-feng, BI Ji-cheng. Effect of Ca(OH)2 catalyst on catalytic coal gasification and methanation[J]. Journal of Fuel Chemistry and Technology, 2016, 44(10): 1160-1167.

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CHEN Zhao-hui, LIU Lei, WU Heng, PEI Zeng-kai, ZHAN Yue-ping, LI Ke-zhong, ZHENG Yan, WU Li-feng, BI Ji-cheng. Effect of Ca(OH)₂ catalyst on catalytic coal gasification and methanation[J]. Journal of Fuel Chemistry and Technology, 2016, 44(10): 1160-1167.

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Effect of Ca(OH)₂ catalyst on catalytic coal gasification and methanation

1.
State Key Laboratory of Coal-based Low Carbon Energy, ENN Group, Langfang 065001, China
2.
State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China

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Corresponding author: E-mail: nyyjy@enn.cn
Received Date: 2016-05-12
Rev Recd Date: 2016-07-12

Available Online: 2021-01-23

Publish Date: 2016-10-10

Abstract

Abstract

The catalytic gasification performance of Buliangou coal using Ca(OH)₂ as catalyst was investigated at 3.5 MPa and 700-800℃ in a pressurized fixed bed. The effect of gasification temperature, Ca(OH)₂ loading and loading method on coal steam gasification and methanation reaction were examined. The results show that Ca(OH)₂ can enhance the reactivity of char gasification and the formation of CH₄. Increasing temperature and Ca(OH)₂ loading can heighten the carbon conversion, but Ca(OH)₂ loading possesses a saturation point. The gasification reactivity is affected by loading method which determines the Ca(OH)₂ dispersion. The coal char loaded with Ca(OH)₂ shows a great catalytic activity on methanation reaction and the CH₄ content in the product gas increases with the increase of methanation temperature and catalyst loading. The analysis result of coal surface function groups by FT-IR reveals the dispersion mechanism of Ca(OH)₂ into the matrix of coal through ion exchange and diffusion, which is a key factor to improve coal char gasification reactivity.
- catalytic gasification,
- Ca(OH)₂,
- methanation,
- coal char

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References(30)

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