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不同气氛下煤连续热解产物的分配规律及产品品质分析

钟梅 ,  马凤云

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引用本文: 钟梅, 马凤云. 不同气氛下煤连续热解产物的分配规律及产品品质分析[J]. 燃料化学学报, 2013, 41(12): 1427-1436. shu
Citation:  ZHONG Mei, MA Feng-yun. Analysis of product distribution and quality for continuous pyrolysis of coal in different atomspheres[J]. Journal of Fuel Chemistry and Technology, 2013, 41(12): 1427-1436. shu

不同气氛下煤连续热解产物的分配规律及产品品质分析

    通讯作者: 马凤云，Tel：010-82544886，E-mail：ma_fy@126.com。
  • 基金项目:

    新疆大学博士启动基金（BS120111）；新疆维吾尔自治区青年教师科研培育基金（XJEDU2011S03）；新疆大学石油天然气精细化工重点实验室开放课题基金（XJDX0908-2012-6） 。 

摘要: 在连续进出料的流化床中研究了热解温度为850 ℃时，含有O2、H2、CO、CO2、CH4的反应气氛对热解产物分配规律及产品组成的影响。采用Raman、BET等测试方法对不同热解气氛下制得半焦的品质进行了评价，结合热重分析了影响半焦反应活性的因素。结果表明，无O2气氛下，H2与CO2存在时降低了焦油产率，而CO与CH4促进了焦油的生成。CH4的裂解析碳使半焦产率上升。O2的加入使CO2、CO含量明显增加，半焦及焦油产率降低。N2中引入O2时，PAHs含量降低。CH4促进了烷基萘与苯类的生成，CO则抑制酚类裂解生成苯类。CO2的气化作用促进了微孔的生成，相应地，半焦的比表面积快速增加，半焦的反应活性也最高。CO歧化与CH4热裂解产生的析碳堵塞了部分孔道，降低了比表面积。H2与CH4所产生的氢自由基能渗透到半焦内部，引起半焦结构的缩聚，进而影响氧化反应活性。

English

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  • 收稿日期:  2013-03-28
  • 网络出版日期:  2013-05-14
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