Heterogeneous reaction kinetics of catalytic coal gasification

LI Wei-wei; LI Ke-zhong; KANG Shou-guo; ZHENG Yan; ZHANG Rong; BI Ji-cheng

Volume 42 Issue 03

Mar. 2014

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Article Navigation > Journal of Fuel Chemistry and Technology > 2014 > 42(03): 290-296

LI Wei-wei, LI Ke-zhong, KANG Shou-guo, ZHENG Yan, ZHANG Rong, BI Ji-cheng. Heterogeneous reaction kinetics of catalytic coal gasification[J]. Journal of Fuel Chemistry and Technology, 2014, 42(03): 290-296.

Citation:

LI Wei-wei, LI Ke-zhong, KANG Shou-guo, ZHENG Yan, ZHANG Rong, BI Ji-cheng. Heterogeneous reaction kinetics of catalytic coal gasification[J]. Journal of Fuel Chemistry and Technology, 2014, 42(03): 290-296.

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Heterogeneous reaction kinetics of catalytic coal gasification

1.
State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China;
2.
University of Chinese Academy of Sciences, Beijing 100049, China;
3.
ENN Group State Key Laboratory of Coal-based Low Carbon Energy, Langfang 065001, China

Received Date: 2013-08-26
Rev Recd Date: 2013-10-28
Publish Date: 2014-03-31

Abstract

Abstract

The gasification tests of Shenmu coal char were carried out in a pressured fixed bed reactor to investigate the effect of gasification agents (H₂O, CO₂, H₂), catalyst loading, and partial pressure of hydrogen and carbon monoxide on the carbon conversion and reaction rate. The results show that the heterogeneous reaction rate is in the order of C-H₂O >C-CO₂>C-H₂. H₂ and CO inhibit the steam gasification rate to some degrees. The inhibition of CO is much greater than that of H₂. The carbon conversion decreases by about 50% with the addition of only 5% CO at 700 ℃. A kinetic model is developed combined Langmuir-Hinshelwood (L-H) with the random pore model, considering the effect of catalyst loading and the partial pressure of gasification product gases. The deviation between predication and experiment value is less than 10%, indicating that the derived kinetic model is appropriate for describing the catalytic coal gasification with steam.
- catalytic coal gasification,
- pressured fixed bed,
- kinetics,
- random pore model

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References(20)

References

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