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阴、阳离子影响离子液体溶解甲烷性能的研究进展 被引量:1

PROGRESS OF EFFECT OF ANION AND CATION ON SOLUBILITIES OF METHANE BY IONIC LIQUIDS
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摘要 煤矿抽采出的低浓度瓦斯直接排空不仅浪费清洁能源而且加剧温室效应。离子液体(IL)是近年来用于气体分离的热点研究对象。综述了利用IL分离气体,特别在溶解CH_4气体方面的研究进展,归纳了具有高效溶解CH4能力的IL结构特征,以及阴阳离子对IL溶解CH_4的影响规律。分析结果表明CH_4在大部分ILs中的溶解度较小;与咪唑类ILs相比,阴离子为[FAP]~-、[doc]~-、[Tf_2N]~-、[TMPP]~-,阳离子取代链为长烷烃的季膦类和季胺类ILs具有更强的溶解CH_4的能力。特别是[P4444][TMPP]和[P(14)666][TMPP]对CH_4表现出优越的溶解性,可考虑用这2种ILs存储CH_4。至于两者能否用于浓缩CH_4,还需实验测试[P4444][TMPP]和[P(14)666][TMPP]溶解CO_2和N_2的情况,以及对溶解过程的影响。 The direct release of the low concentration gas extracted from coal seam not only will dissipate clean energy but also aggravate greenhouse effect. Ionic liquid( IL),a new solvent with low volatility and high gas-separating performance,is a research hotspot in the field of gas separation. Research progresses about separating gases using ILs in recent years are reviewed in this paper,and the structure characteristics of the ILs which can dissolve CH_4 efficiently as well as the influence rule of cation and anion on ILs' dissolving performance are analyzed. According to the solubility data of CH_4 in some ILs,it is concluded that CH_4 has much lower solubility than CO_2 in most of ILs. Increasing the alkyl chain length of cations can improve the solubility of CH_4 in ILs. Certain anions,[FAP]-,[doc]-,[Tf2N]-and [TMPP]-,can promote the CH_4 solubility.Quaternary phosphonium-based and quaternary ammonium-based ILs has stronger dissovling ability than imidazolium-based ones. It is feasible to use [P4444][TMPP]and [P14,666][TMPP]to store CH_4 due to their high solubility for CH_4. However,further experiments about the solubility of [P4444][TMPP]and [P14,666][TMPP]for CO_2 and N_2 have to be conducted before they are applied to concentrate CH_4,and the influence of water on the solvation process should be cousidered.
作者 王少坤 王兰云 徐永亮 位亚南 WANG Shao-kun,WANG Lan-yun,XU Yong-liang,WEI Ya-nan(1. School of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, China; 2. State Key Laboratory Cultivation Base for Gas Geology and Gas Control, Jiaozuo 454003, China)
出处 《环境工程》 CAS CSCD 北大核心 2016年第2期164-169,共6页 Environmental Engineering
基金 国家自然科学基金(51304073,51304071) 河南省教育厅重点项目(13A440324,12B44004) 河南理工大学博士基金(B2012-068,B2012-085)
关键词 离子液体 甲烷 阴阳离子 气体分离 ionic liquids methane(CH4) anion and cation gas separation
作者简介 王少坤(1990一),男,硕士,主要从事矿井瓦斯利用基础研究。wsk456@163.com 通信作者:王兰云(1983一),女,博士,副教授,主要从事瓦期防治及瓦斯利用基础研究。wlyhpu@163.com
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