1-氨丙基-3-甲基咪唑溴盐水溶液对CO_2的吸收特性.pdfVIP

学兔兔 石 油 化 工 2014年第43卷第12期 PETROCHEMICAL TECHN0L0GY ·1433· 1一氨丙基—3_甲基咪唑溴盐水溶液对CO2的吸收特性 杨翠莲，李 松，毕 签，郭开华 (中山大学工学院，广东广州，510006) [摘要]以1一氨丙基一3一甲基咪唑溴盐([APMim]Br)为功能型离子液体，考察了其水溶液对CO：的吸收性能。实验结果表 明，[APMim]Br水溶液的含水量(W)为65％～85％较适宜，在该含水量下，[APMim]Br水溶液对CO：具有优异的吸收一解吸 特性。含水量增大可大幅提高[APMim]Br水溶液对CO：的物理吸收能力。随压力的增大，[APMim]Br水溶液对CO：的物理吸 收量基本呈线性增长趋势，遵循亨利定律。温度对[APMim]Br水溶液物理吸收能力的影响显著大于对化学吸收能力的影响。 当压力一定时，[APMim]Br水溶液对CO：的吸收一解吸范围随含水量的增大而变宽。[APMim]Br水溶液在同等条件下对CO： 的吸收能力优于醇胺溶液。 [关键词]1一氨丙基一3一甲基咪唑溴盐；功能型离子液体；二氧化碳；吸收 [文章编号]1000—8144(2O14)12—1433—06 [中图分类号]TQ 028．15 [文献标志码]A Absorption Property of 1-Aminopropyl·—3-—Methylimidazolium Bromide Aqueous Solutions to Carbon Dioxide lang Cuilian，Li song，Bi Yin，GuoKaihua (School ofEngineering，SunYat·Sen University，Guangzhou Guangdong 510006，China) [Abstract]The absorption property of the aqueous solutions of a functional ionic liquid， 1-aminopropyl一3一methylimidazolium bromide([APMim]Br)，to CO2 was investigated．The results indicated that when the water mass fraction was in the range of 65％-85％，the aqueous solutions had excellent absorption-desorption capacity to CO2．The phy sical absorption capacity of the solutions to CO2 could increase evidently when the water content increased．In the solution systems，the amount of CO2 physically absorbed by the l APMim]Br solutions linearly correlated to the pressure rise，which accorded with the Henry’S law．Temperature had remarkable effect on the physical absorption capacity of the[APMim]Br solutions，much greater than that on their chemical absorption capacity．Under a certain pr