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Citation: WANG Xi-ming, ZHU Huai-li, WANG Xing-jun, LIU Hai-feng, YU Guang-suo, WANG Fu-chen. Transformation of K2CO3 as a catalyst during coal char pyrolysis and its effect on coal char catalytic gasification[J]. Journal of Fuel Chemistry and Technology, ;2014, 42(2): 175-180. shu

Transformation of K2CO3 as a catalyst during coal char pyrolysis and its effect on coal char catalytic gasification

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    1. Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education, East China University of Science & Technology, Shanghai 200237, China;

  • Corresponding author: WANG Xing-jun, 
  • Received Date: 28 June 2013
    Available Online: 24 August 2013

    Fund Project: 国家重点基础研究发展规划(973计划,2010CB227000)。 (973计划,2010CB227000)

  • The transformation of K2CO3 in the course of Shenfu char catalytic pyrolysis under different temperatures was studied in the fixed-bed reactor; the influence of loading methods of K2CO3 and particle size on gasification reactivity was investigated in a TG-DSC analytical reactor. The results showed that with the increase of temperature, the effect of loading methods on gasification rate is weakened; K catalyst shows high dispersity by means of SEM/EDX analysis of pyrolysis residue. CO2 and CO are produced through the interaction of K2CO3 and coal char in the pyrolysis and there is a linear relation between the amount of released gas and temperature. The particle size of K2CO3 and coal char has notable impact on gasification; the gasification rate increase with a thinner particle at 650 ℃. K2CO3 shows high mobility within the coal char phase at elevated temperature, which is consistent with its catalytic activities; the effect of loading methods on gasification should be considered under a temperature below 700 ℃.
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