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CO2气氛下生物焦气化反应动力学参数的实验研究：Ⅰ.活化能

董存珍,  汪小憨,  曾小军,  邵振华

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文章导航 > 燃料化学学报（中英文）  > 2014 >  42(03): 329-335
董存珍, 汪小憨, 曾小军, 邵振华. CO2气氛下生物焦气化反应动力学参数的实验研究：Ⅰ.活化能[J]. 燃料化学学报（中英文）, 2014, 42(03): 329-335.
引用本文: 董存珍, 汪小憨, 曾小军, 邵振华. CO2气氛下生物焦气化反应动力学参数的实验研究：Ⅰ.活化能[J]. 燃料化学学报（中英文）, 2014, 42(03): 329-335.
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DONG Cun-zhen, WANG Xiao-han, ZENG Xiao-jun, SHAO Zhen-hua. Experimental study on the gasification kinetic parameters of biomass chars under CO2 atmosphere：Ⅰ. Activation energy[J]. Journal of Fuel Chemistry and Technology, 2014, 42(03): 329-335.
Citation: DONG Cun-zhen, WANG Xiao-han, ZENG Xiao-jun, SHAO Zhen-hua. Experimental study on the gasification kinetic parameters of biomass chars under CO2 atmosphere：Ⅰ. Activation energy[J]. Journal of Fuel Chemistry and Technology, 2014, 42(03): 329-335.
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CO2气氛下生物焦气化反应动力学参数的实验研究：Ⅰ.活化能

  • 1.

    中国科学院 广州能源研究所, 广东 广州 510640;

  • 2.

    中国科学院大学, 北京 100049

基金项目: 国家自然科学基金（51276184）；国家重点基础研究发展规划（973计划，2011CB201501）。
详细信息
    通讯作者:

    汪小憨，E-mail：wangxh@ms.giec.ac.cn，Tel：020-87057765

  • 中图分类号: TK6

Experimental study on the gasification kinetic parameters of biomass chars under CO2 atmosphere：Ⅰ. Activation energy

  • 1.

    Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China;

  • 2.

    University of Chinese Academy of Sciences, Beijing 100049, China

    摘要
  • 摘要: 利用热重分析仪在750~1 000 ℃对四种生物质进行了CO2等温气化实验。结果表明，各生物质焦的气化反应性随气化温度的升高而增加。用碳转化率为20%时的瞬时气化反应速率r0.2对反应速率r进行无量纲化，发现在实验温度范围内，各焦炭的无量纲气化反应速率-碳转化率曲线均存在两种变化趋势。利用等转化率法求取了四种生物焦在碳转化率达到20%后的气化反应活化能，发现同一种焦炭的气化反应活化能受碳转化率的影响较小，而不同种类焦炭的活化能主要受到焦中无机矿物成分的影响。各焦炭的活化能与焦中碱金属含量与固定碳含量的比值WC/WFC存在近似的线性关系：E=233.9-1 005.7×（WC/WFC）。若忽略催化效应的影响，焦炭本征气化反应的活化能趋于某一定值，约为234 kJ/mol。
    Abstract: The isothermal gasification tests of 4 biomass samples were performed in CO2 atmosphere using a thermo-gravimetric analyzer at 750~1 000 ℃. The results show that the gasification reaction rate increases with increasing gasification temperature. Through the dimensionless procedure of r using r0.2, two different trends of dimensionless gasification reaction rate with carbon conversion are observed when the gasification temperature is changed. Accordingly, activation energies of the biomass chars were calculated by iso-conversion method. It is found that the activation energy of any biomass char is basically constant, not varying with the carbon conversion obviously. Activation energies of different chars are mainly affected by the inorganic mineral composition in the char and can be described in a linear function of the ratio of WC/WFC, which is E=233.9-1 005.7×(WC/WFC). It can be predicted that the intrinsic activation energy of the biomass char might tend to a certain value 234 kJ/mol if the catalytic effect of the metallic element is ignored.
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出版历程
  • 收稿日期:  2013-10-28
  • 修回日期:  2013-12-31
  • 刊出日期:  2014-03-31

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