OALib Journal期刊
ISSN: 2333-9721
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溶剂极性控制下的煤抽余物吸附甲烷能力研究
, PP. 1153-1157
Keywords: 吸附,有机溶剂抽提,相似相容原理,溶剂极性
Abstract:
?基于原煤和有机溶剂抽余物的等温吸附实验结果,对比分析溶剂极性与其煤抽余物吸附甲烷能力变化关系,探讨抽提溶剂极性差异对煤抽余物吸附甲烷能力控制的地球化学机理。结果表明,煤溶剂抽余物等温吸附甲烷曲线都遵循langmuir方程,且二硫化碳(cs2)和苯(c6h6)溶剂抽提作用增大了煤吸附甲烷量,四氢呋喃(thf)和丙酮溶剂抽提作用减小了煤吸附甲烷量。实验发现,煤抽余物吸附甲烷能力变化与抽提溶剂极性成负相关关系,该现象可用相似相容原理解释:cs2和c6h6溶剂极性较弱,抽提出较多具有非极性结构(-ch3和-ch2-)的烷烃和芳烃,为甲烷在煤表面吸附增多了吸附位而增强了抽余物吸附甲烷能力,thf和丙酮溶剂极性较强,抽提出较多具有极性结构(-cho、-oh、和-cooh)的非烃和沥青质,减少了吸附位而降低煤抽余物的甲烷吸附能力。
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