摘要
合成出3种表面活性离子液体1-(3-磺酸基)丙基六亚甲基亚胺十二烷基苯磺酸、1-(3-磺酸基)丙基哌啶十二烷基苯磺酸和1-(3-磺酸基)丙基-3-甲基咪唑十二烷基苯磺酸,用1H NMR、FTIR、TG和元素分析方法对其进行了表征,并测定了这3种表面活性离子液体的表面张力。实验结果表明,合成的3种表面活性离子液体具有离子液体和表面活性剂的双功能特性,其水溶液的表面张力与十二烷基苯磺酸钠水溶液的表面张力相近,将其应用于CO2水合物生成的实验中,三者均能明显促进CO2水合物的生成,其中1-(3-磺酸基)丙基哌啶十二烷基苯磺酸促进CO2水合物生成的效果最佳,在4℃时其300 mg/L的水溶液与纯水和700 mg/L的十二烷基苯磺酸钠水溶液相比,CO2水合物相平衡压力分别下降20.1%,13.6%。
Three ionic liquids with surface activity,1-（3-sulfonic group）propyl hexamethyleneiminium dodecylbenzenesulfonic acid,1-（3-sulfonic group） propyl piperidinium dodecylbenzenesulfonic acid （[PPS] DBSA） and 1-（3-sulfonic group）propyl-3-methyl imidazolium dodecylbenzenesulfonic acid,were synthesized and characterized by 1H NMR,FTIR,TG and element analysis.The surface tensions of the ionic liquid solutions with different concentration were measured at different temperature.The results showed that they possessed the dual functional activities of surfactants and ionic liquids.The surface tensions of the ionic liquid solutions were approximated to that of sodium dodecylbenzene sulfonate solution.The ionic liquids were applied in the formation of CO2 hydrate and the performance of [PPS] DBSA was the best.Compared to pure water and 700 mg/L sodium dodecylbenzenesulfonate solution,the phase equilibrium pressure of the CO2 hydrate in 300 mg/L [PPS] DBSA solution at 4 ℃ decreased by 20.1％ and 13.6％,respectively.
出处
《石油化工》
CAS
CSCD
北大核心
2014年第3期304-309,共6页
Petrochemical Technology
基金
国家自然科学基金项目(51176015)
关键词
表面活性离子液体
二氧化碳水合物
表面张力
ionic liquid with surface activity
carbon dioxide hydrate
surface tension
