Citation: JING Xu-liang, WANG Zhi-qing, FANG Yi-tian. Steam re-gasification properties and kinetics of coal char fines derived from fluidized bed gasifier[J]. Journal of Fuel Chemistry and Technology, ;2013, 41(4): 400-406. shu

Steam re-gasification properties and kinetics of coal char fines derived from fluidized bed gasifier

1.
1. Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China;

Corresponding author: FANG Yi-tian,
Received Date: 9 August 2012
Available Online: 21 September 2012
Fund Project: 国家自然科学基金(21106173) (21106173) 中国科学院战略性先导科技专项(XDA07050100) (XDA07050100) 中国科学院山西煤炭化学研究所青年人才基金(2011SQNRC). (2011SQNRC)

The steam gasification behavior and kinetics of coal char fines derived from fluidized bed gasifier were investigated by TGS-2 thermogravimetric analyzer. Their physical and chemical properties were also compared with the corresponding coal chars and demineralized char fines. The results show that the gasification reactivity of char fines increase with increasing temperature. Compared with the coal char from pyrolysis, the char fine has a larger surface area and leads to a higher gasification reactivity. The reactivity of different coal char fines are also affected by their carbon crystalline structure and ash content. Based on this, the gasification reactions are described by the shrinking core model and the kinetic parameters are obtained, so as to provide some theoretical guides for the gasification of coal char fines.
- coal char fines,
- steam gasification,
- pore structure,
- gasification kinetics
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