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高等学校化学研究 ›› 2006, Vol. 22 ›› Issue (1): 103-110.

• Articles • 上一篇    下一篇

Influences of Temperature and Coal Particle Size on the Flash Pyrolysis of Coal in a Fast-entrained Bed

CUI Li-jie1,2, LIN Wei-gang1, YAO Jian-zhong1   

  1. 1. Multi-phase Reaction Laboratory, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100080, P. R. China;
    2. Graduate School, Chinese Academy of Sciences, Beijing 100080, P. R. China
  • 收稿日期:2005-01-23 出版日期:2006-02-24 发布日期:2011-08-06
  • 基金资助:

    Supported by the National Natural Science Foundation of China(Nos.90210034 and 20221603), the National Program of Basic Research(No. G1999022103) and the National Program of High Tech. Research and Development(No. 2001AA529010).

Influences of Temperature and Coal Particle Size on the Flash Pyrolysis of Coal in a Fast-entrained Bed

CUI Li-jie1,2, LIN Wei-gang1, YAO Jian-zhong1   

  1. 1. Multi-phase Reaction Laboratory, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100080, P. R. China;
    2. Graduate School, Chinese Academy of Sciences, Beijing 100080, P. R. China
  • Received:2005-01-23 Online:2006-02-24 Published:2011-08-06
  • Supported by:

    Supported by the National Natural Science Foundation of China(Nos.90210034 and 20221603), the National Program of Basic Research(No. G1999022103) and the National Program of High Tech. Research and Development(No. 2001AA529010).

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摘要： The experiments on the flash pyrolysis of a lignite were carried out in a fast-entrained bed reactor as a basic study on a so-called 'coal topping process'. The investigation focused on the effects of pyrolysis temperature and coal particle size on the product distribution and composition. The experimental results show that an increase in the pyrolysis temperature results in a higher yield of gaseous products while a larger particle size leads to a decrease of the liquid yield. An optimum temperature for the liquid yield was found to be 650 ℃. A certain amount of phenol groups was found in the liquid products, which may be used to produce high-valued fine chemicals. The FTIR analyses of the coal and chars show that aliphatic structures in the chars are gradually replaced by aromatic structures with the increasing of pyrolysis temperature and coal particle size. The results of this study provide fundamental data and optimal conditions to maximize light oils yields for the coal topping process.

关键词: Fluidized Bed, Coal, Flash pyrolysis, Particle Size, Temperature

Abstract: The experiments on the flash pyrolysis of a lignite were carried out in a fast-entrained bed reactor as a basic study on a so-called 'coal topping process'. The investigation focused on the effects of pyrolysis temperature and coal particle size on the product distribution and composition. The experimental results show that an increase in the pyrolysis temperature results in a higher yield of gaseous products while a larger particle size leads to a decrease of the liquid yield. An optimum temperature for the liquid yield was found to be 650 ℃. A certain amount of phenol groups was found in the liquid products, which may be used to produce high-valued fine chemicals. The FTIR analyses of the coal and chars show that aliphatic structures in the chars are gradually replaced by aromatic structures with the increasing of pyrolysis temperature and coal particle size. The results of this study provide fundamental data and optimal conditions to maximize light oils yields for the coal topping process.

Key words: Fluidized Bed, Coal, Flash pyrolysis, Particle Size, Temperature