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(3): 290-296. shu

Heterogeneous reaction kinetics of catalytic coal gasification

LI Wei-wei ^1,2,3 ,
LI Ke-zhong ^1,3 ,
KANG Shou-guo ³ ,
ZHENG Yan ³ ,
ZHANG Rong ¹ ,
BI Ji-cheng ^1,3,,

1.
1. State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China;

Corresponding author: BI Ji-cheng,
Received Date: 26 August 2013
Available Online: 28 October 2013
Fund Project: 国家重点基础研究发展规划(973计划,2011CB201305) (973计划,2011CB201305)国家科技支撑计划(2009BAA25B03) (2009BAA25B03)煤转化国家重点实验室自主研究课题(2011BWZ002)。 (2011BWZ002)

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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