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Citation: GAO Song-ping, WANG Jian-fei, ZHAO Jian-tao, WANG Zhi-qing, FANG Yi-tian, HUANG Jie-jie. CH4 release character from pressurized fast pyrolysis of lignite in CO atmosphere[J]. Journal of Fuel Chemistry and Technology, ;2014, 42(6): 641-649. shu

CH4 release character from pressurized fast pyrolysis of lignite in CO atmosphere

  • 1.

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

  • Corresponding author: FANG Yi-tian, 
  • Received Date: 6 January 2014
    Available Online: 17 March 2014

    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(XDA0705100) (XDA0705100)中国科学院山西煤炭化学研究所青年人才基金(2011SQNRC01) (2011SQNRC01)高等学校科技创新项目(20091040)。 (20091040)

  • Fast pyrolysis of Huolinhe lignite was carried out under pressure in a tubular reactor, and the CH4 evolution at CO atmosphere was examined. CO dissociation state O(a) adsorbed on coal is an active center. The stronger electronegative O could induce the electron cloud of other atoms around O(a) atom to offset to it, which could weaken the strength of original chemical bonds and promote their breaking. These result in the cracks of the aromatic ring, side chain, ether linkages and aliphatic chain in the char, which could produce more free radicals. The free radicals could stabilize the fragments produced in the pyrolysis, and lead to more CH4 generated and involved. Therefore, the CH4 yield is higher under CO than it in N2. The CH4 yield increases by 12.5% under CO compared with N2 at 900 ℃ and 1.0 MPa. The CH4 yield increases with raise of temperature and pressure.
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