咪唑类离子液体混合物吸收CO_2性能研究  

Studies on CO_2 absorption performance by imidazole-based ionic liquid mixtures

作　　者：王梅[1,2] 张立麒[1] 刘浩[2] 张军营[1] 郑楚光[1] 

机构地区：[1]华中科技大学煤燃烧国家重点实验室,湖北武汉430074 [2]湖北工业大学化学与环境工程学院,湖北武汉430068

出　　处：《燃料化学学报》2012年第10期1264-1268,共5页Journal of Fuel Chemistry and Technology

基　　金：国家自然科学基金(51076056;51021065);国家重点基础研究发展规划(973计划;2011CB707301);煤燃烧国家重点实验室开放基金(FSKLCC1111)

摘　　要：结合常规离子液体和功能型离子液体在吸收CO2方面的优势,将两类咪唑类离子液体进行混合,对其吸收CO2的效果和再生性能进行了实验研究。结果表明,两类咪唑类离子液体混合后流动性明显改善,与CO2接触气液传质顺畅;常规离子液体[bmim][BF4]和[bmim][Tf2N]与胺功能型离子液体[NH2e-mim][BF4]混合物较单一的离子液体吸收CO2的量大,[bmim][CH3CO2]与[NH2e-mim][BF4]混合后较单一的[bmim][CH3CO2]吸收量有明显的减低;随着常规咪唑类离子液体阳离子碳链增长,混合离子液体吸收CO2的效果变强;与胺乙基功能型离子液体混合吸收CO2时,阴离子为[Tf2N]的常规咪唑类离子液体要比阴离子为[BF4]的吸收效果好;离子液体混合物吸收CO2后经再生循环利用10次,混合物质量基本不变,循环使用后吸收CO2性能为初始吸收性能的75%～85%。Conventional and functional imidazole-based ionic liquids（abbr.ILs） were mixed based on their advantage and disadvantage on CO2 reduction.Additionally,CO2 absorption effect and regeneration performance of imidazole-based IL mixtures were discussed.It was showed that imidazole-based IL mixtures had good fluidity and smooth of transferring CO2.It had better absorption capacity of CO2 for the mixtures of （or ） and than the single IL,and lower absorption capacity for the mixtures of and than .While the cation of conventional imidazolium ILs became longer and the mixtures could absorb CO2 more obviously,more strong effect was shown on CO2 absorption with the anion than the anion for the conventional imidazolium IL.CO2 absorption capacity of the imidazole-based IL mixtures had maintained 75%~85% of the initial capacity during 10 times of the absorption/regeneration cycles,while the quality of the regeneration was unchanged.

关 键 词：咪唑类离子液体 CO2减排 CO2吸收 再生性能 

分 类 号：TK09[动力工程及工程热物理]