Citation: 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. shu

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

CHEN Zhao-hui ¹ ,
LIU Lei ¹ ,
WU Heng ¹ ,
PEI Zeng-kai ¹ ,
ZHAN Yue-ping ¹ ,
LI Ke-zhong ^1,*,, ,
ZHENG Yan ¹ ,
WU Li-feng ¹ ,
BI Ji-cheng ^1,2

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

Corresponding author: LI Ke-zhong, nyyjy@enn.cn
Received Date: 12 May 2016
Revised Date: 12 July 2016

Figures(11)

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