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Citation: FAN Li-xia, LI Ke-zhong, ZHANG Rong, BI Ji-cheng. Methanation of CO over coal char loaded with K2CO3[J]. Journal of Fuel Chemistry and Technology, ;2014, 42(9): 1047-1052. shu

Methanation of CO over coal char loaded with K2CO3

  • 1.

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

  • Corresponding author: ZHANG Rong, 
  • Received Date: 18 April 2014
    Available Online: 11 June 2014

    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(2009BAA25B02)。 (2009BAA25B02)

  • The catalytic performance of coal char loaded with potassium carbonate on the CO methanation reaction was investigated in a pressurized fixed bed reactor. The results show that the catalytic activities of raw coal pyrolysis char and demineralized coal pyrolysis char are very low, while with loading 10% potassium carbonate, the catalytic activity of chars increases obviously and the yield of methane reaches to 30%. The gasification rate changes with the progress of carbon conversion and has a maximum value at a carbon conversion around 22%. The analysis by FT-IR indicates that the interaction of potassium carbonate with coal can form C-O-K complexes during pyrolysis at 700℃, with an infrared band around 1 100 cm-1. The intensity of this band is found to be proportional to the steam gasification rate of the carbon. After reaction in CO-H2 mixture gas at 700℃ for 180 min, the intensity of C-O-K vibration increases more or less.
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