Citation: LIU Yu-bo, ZHANG Yong-qi, WANG Zhi-qing, LI Jia-zhou, HUANG Jie-jie, ZHAO Jian-tao, FANG Yi-tian. Particle size classification and CO₂ gasification of the char fines from fluidized bed gasification of Shenhua coal[J]. Journal of Fuel Chemistry and Technology, ;2016, 44(1): 44-52. shu

Particle size classification and CO₂ gasification of the char fines from fluidized bed gasification of Shenhua coal

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

Corresponding author: ZHANG Yong-qi, zhangyq@sxicc.ac.cn
Received Date: 20 August 2015
Revised Date: 21 October 2015

Fund Project: The proect was supported by the National Science Foundation of China 21106173the Strategic Priority Research Program of the Chinese Academy of Sciences XDA07050100Youth Innovation Promotion Association 2014156the Natural Science Fund of Shanxi Province 2013021007-2

Figures(11)

The char fines from fluidized bed gasification (fines for short) are classified into 7 components based on particle size. The basic physicochemical properties, the constant and programmed increasing temperature CO₂ gasification behaviors were investigated by coal quality analyzer, elemental analyzer, X-ray powder diffractometer, gas sorption analyzer and thermogravimetric analyzer. The difference of gasification reactivity and its reasons were discussed. The results show that after partial gasification, fixed carbon of the fines is higher than that of its parent coal but lower than the corresponding coal char because of the escape of volatiles. The particle size distribution of fines is very wide and multimodal distribution with the shape of "M". In addition, the ash content of fines approximately increases with decreasing particle size. However, the carbon content decreases with decreasing particle size. Both the constant and programmed increasing temperature CO₂ gasification show the same result. The gasification reactivity firstly decreases and then gradually increases with decreasing particle size. Furthermore, the carbon crystalline structure and ash content are contributed to the difference in gasification reactivity of fines, and the different reactivity is not related to the pore structure in this experimental condition.
- fines,
- particle size classification,
- fluidized bed gasification,
- gasification reactivity
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沈阳化工大学材料科学与工程学院沈阳 110142

Particle size classification and CO2 gasification of the char fines from fluidized bed gasification of Shenhua coal

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通讯作者: 陈斌, bchen63@163.com

Particle size classification and CO₂ gasification of the char fines from fluidized bed gasification of Shenhua coal