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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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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, 2014, 42(3): 329-335. shu
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(3): 329-335. shu

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

    通讯作者: 汪小憨,E-mail:wangxh@ms.giec.ac.cn,Tel:020-87057765
  • 基金项目:

    国家自然科学基金(51276184) (51276184)

    国家重点基础研究发展规划(973计划,2011CB201501)。 (973计划,2011CB201501)

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。

English

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  • 收稿日期:  2013-10-28
  • 网络出版日期:  2013-12-31
通讯作者: 陈斌, bchen63@163.com
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