煤中可溶有机质对煤的孔隙结构及甲烷吸附特性影响

杨永良 李增华 季淮君 彭英健 刘震

引用本文: 杨永良, 李增华, 季淮君, 彭英健, 刘震. 煤中可溶有机质对煤的孔隙结构及甲烷吸附特性影响[J]. 燃料化学学报, 2013, 41(4): 385-390. shu
Citation:  YANG Yong-liang, LI Zeng-hua, JI Huai-jun, PENG Ying-jian, LIU Zhen. Effect of soluble organic matter in coal on its pore structure and methane sorption characteristics[J]. Journal of Fuel Chemistry and Technology, 2013, 41(4): 385-390. shu

煤中可溶有机质对煤的孔隙结构及甲烷吸附特性影响

    通讯作者: 杨永良(1979-), 男, 山东日照人, 副教授, 工学博士, 主要从事矿井瓦斯防治和煤田地质方面的研究. E-mail: yyliang456@126.com.
  • 基金项目:

    国家重点基础研究发展规划(973计划, 2011CB201200). (973计划, 2011CB201200)

摘要: 采用四氢呋喃对临涣7煤和祁南3煤进行微波辅助抽提,进行了原煤和残煤等温吸附实验和低温氮气吸附测试,对比分析了抽提前后原煤和残煤的甲烷吸附量和比表面积、孔分布情况,并理论测算煤中可溶有机质吸附溶解甲烷量.结果表明,残煤的甲烷吸附能力低于原煤;抽提后,煤的比表面积和总孔体积增大,平均孔径减少,影响煤吸附气体能力的主要孔径为1.7~5.0 nm,且该范围内的孔数有不同程度的增加;压力为0.1~5.0 MPa时,两煤样中可溶有机质吸附溶解的甲烷量分别为0.45~4.22 mL/g、0.69~4.99 mL/g,最大吸附量分别占到原煤最大吸附量的30%和38%.分析认为,煤中可溶有机质占据部分煤中孔隙,影响煤孔隙结构,同时,在压力的作用下,甲烷可以溶解和吸附煤中可溶有机质.

English

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  • 收稿日期:  2012-11-21
  • 网络出版日期:  2013-01-27
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