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Citation: YU Zhong-liang, LI Chun-yu, JING Xu-liang, DING Liang, FANG Yi-tian, HUANG Jie-jie. Catalytic chemical looping combustion of coal with iron-based oxygen carrier promoted by K2CO3[J]. Journal of Fuel Chemistry and Technology, ;2013, 41(7): 826-831. shu

Catalytic chemical looping combustion of coal with iron-based oxygen carrier promoted by K2CO3

  • 1.

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

  • Corresponding author: FANG Yi-tian, 
  • Received Date: 19 May 2013
    Available Online: 4 June 2013

    Fund Project: 山西省青年科技研究基金(2012021005-4). (2012021005-4)

  • Effects of K2CO3 addition and inert supports on chemical looping combustion (CLC) of coal with iron-based oxygen carrier were investigated. The results indicate that the reduction of iron-based oxygen carrier by coal can be remarkably improved by the addition of K2CO3. This enhancement can be ascribed to the catalytic CO2 gasification (rate-controlling step) by K2CO3 which migrates from oxygen carrier to coal particles. The sintering of iron-based oxygen carrier is promoted by K2CO3 due to its low melting temperature and the intensified redox reaction after K2CO3 addition. The inert support has no significant effect on the reactivity between coal and oxygen carrier, which could be due to the inert support do not affect the rate-limiting step. The catalytic activity can be observed during several redox cycles. However, there is a decreasing tendency of activity due to the loss and deactivation of catalyst.
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