基于活度系数模型的含离子液体体系相平衡研究  

Phase Equilibrium Study of Systems Containing Ionic Liquids Based on Activity Coefficient Model

作　　者：孙德章 李文秀[1] 胡盎然 张志刚[1] 

机构地区：[1]沈阳化工大学化学工程学院,辽宁沈阳110142

出　　处：《沈阳化工大学学报》2016年第2期111-116,共6页Journal of Shenyang University of Chemical Technology

基　　金：国家自然科学基金(21076126)

摘　　要：在常压下(101.3 k Pa)下测定含不同离子液体的丙酮、甲醇的二元汽液平衡数据:丙酮+单乙醇胺醋酸盐([HMEA][OAC]);甲醇+[HMEA][OAC];丙酮+1-乙基-3-甲基咪唑醋酸盐([EMIM][OAC])和甲醇+[EMIM][OAC].通过NTRL模型和Wilson模型对测得的平衡数据进行关联.关联结果表明:NRTL模型与实验数据的符合程度高于Wilson模型,因此NRTL模型更加适合含离子液体体系的二元汽液相平衡计算.同时,通过活度系数模型回归出丙酮、甲醇、[EMIM][OAC]和[HMEA][OAC]两两之间的二元能量交互参数.The binary vapor liquid equilibrium data of acetone or methanol with different ionic liquids were measured in atmospheric pressure（ 101. 3 k Pa）,including acetone ＋ [HMEA][OAC ],Methanol ＋[HMEA][OAC],acetone ＋[EMIM][OAC] and[EMIM][OAC]＋ methanol. The experimental data were correlated with NTRL and Wilson activity coefficient model. The correlation results showed that the NRTL model and the experimental data were in better agreement than Wilson model,so the NRTL model was more suitable for the system containing ionic liquid. At the same time,the binary energy parameters between each two of acetone,methanol,[EMIM][OAC] and[HMEA][OAC] were obtained by the method of iteration. For the separation of acetone ＋ methanol azeotrope,the study will offer some certain theoretical basis.

关 键 词：离子液体 汽液平衡 NRTL模型 Wilson模型 

分 类 号：O642.42[理学—物理化学]