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CO对褐煤快速热解行为的影响

高松平 ,  赵建涛 ,  王志青 ,  王建飞 ,  房倚天 ,  黄戒介

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引用本文: 高松平, 赵建涛, 王志青, 王建飞, 房倚天, 黄戒介. CO对褐煤快速热解行为的影响[J]. 燃料化学学报, 2013, 41(5): 550-557. shu
Citation:  GAO Song-ping, ZHAO Jian-tao, WANG Zhi-qing, WANG Jian-fei, FANG Yi-tian, HUANG Jie-jie. Effect of CO on fast pyrolysis behaviors of lignite[J]. Journal of Fuel Chemistry and Technology, 2013, 41(5): 550-557. shu

CO对褐煤快速热解行为的影响

    通讯作者: 房倚天, 研究员, Tel/Fax: 0351-2021137, E-mail: fyt@sxicc.ac.cn。
  • 基金项目:

    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)

摘要: 利用快速升温固定床进行了霍林河褐煤在CO气氛下快速热解反应行为的研究,考察了热解半焦的产率、性质和气体产物的分布特点。半焦的红外光谱图、元素含量和表面结构性质分析表明,CO参与并改变了褐煤的热解行为。与N2气氛相比,热解温度低于600 ℃时,带孤对电子的极性CO容易诱发半焦结构中芳香环的开裂,侧链、醚键和脂肪链的断裂,促进小分子片段和自由基的生成,自由基稳定了煤热解生成的碎片,导致挥发分的生成和逸出量增加,H2、CH4、CO和CO2的产率增大,半焦产率降低,半焦的比表面积和孔容增大。热解温度高于700 ℃时,CO的歧化反应程度增大,产生的积碳附着于半焦的表面,阻塞了孔道,导致半焦的比表面积和孔容减小,从而抑制了CO在半焦孔隙结构内部的扩散,限制了CO与煤中有机大分子结构的接触和反应,导致H2、CH4和CO产率减小,而CO2产率因CO歧化反应而增大。

English

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  • 收稿日期:  2012-10-25
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