Vapor-Liquid Equilibrium Measurements and Modeling for Ternary System Water+Ethanol+1-Butyl-3-methylimidazolium Acetate

›› 2011, Vol. 19 ›› Issue (4): 703-708.

• • 上一篇

Vapor-Liquid Equilibrium Measurements and Modeling for Ternary System Water+Ethanol+1-Butyl-3-methylimidazolium Acetate

邓东顺, 汪如发, 章连众, 葛绮, 计建炳

Zhejiang Province Key Laboratory of Biofuel, College of Chemical Engineering and Material Science, Zhejiang University of Technology, Hangzhou 310014, China

收稿日期:2010-12-06 修回日期:2011-04-11 出版日期:2011-08-28 发布日期:2011-08-28
通讯作者: ZHANG Lianzhong,E-mail:zhanglz@zjut.edu.cn
基金资助:
Supported by the National Natural Science Foundation of China (20776132)

Vapor-Liquid Equilibrium Measurements and Modeling for Ternary System Water+Ethanol+1-Butyl-3-methylimidazolium Acetate

DENG Dongshun, WANG Rufa, ZHANG Lianzhong, GE Yun, JI Jianbing

Zhejiang Province Key Laboratory of Biofuel, College of Chemical Engineering and Material Science, Zhejiang University of Technology, Hangzhou 310014, China

Received:2010-12-06 Revised:2011-04-11 Online:2011-08-28 Published:2011-08-28
Supported by:
Supported by the National Natural Science Foundation of China (20776132)

摘要/Abstract

摘要： Vapor-liquid equilibrium(VLE) data were measured for ternary system water+ethanol+1-butyl-3methylimidazolium acetate([bmim][OAc]), in a relatively wide range of ionic liquid(IL) mass fractions up to 0.8.Six sets of complete T-x-y data were obtained, in which the mole fraction of ethanol on IL-free basis was fixed separately at 0.1, 0.2, 0.4, 0.6, 0.8, and approximate 0.98.The non-random-two-liquid(NRTL) and electrolyte non-random-two-liquid(eNRTL) equations were used for correlation, showing similar deviations.The ternary VLE was also modeled with the correlation from two data sets, with the mole fractions of ethanol on IL-free basis being 0.1 and approximate 0.98.The VLE data were also reproduced satisfactorily.With the eNRTL model, the root-mean-square deviation for temperature is 0.79 K and that for vapor-phase mole fraction is 0.0094.The calculations are in good agreement with experimental data.The effect of the IL on the VLE behavior of the volatile components is also illustrated.

关键词: vapor-liquid equilibrium, eNRTL equation, ionic liquid, ethanol, activity coefficient, relative volatility

Abstract: Vapor-liquid equilibrium(VLE) data were measured for ternary system water+ethanol+1-butyl-3methylimidazolium acetate([bmim][OAc]), in a relatively wide range of ionic liquid(IL) mass fractions up to 0.8.Six sets of complete T-x-y data were obtained, in which the mole fraction of ethanol on IL-free basis was fixed separately at 0.1, 0.2, 0.4, 0.6, 0.8, and approximate 0.98.The non-random-two-liquid(NRTL) and electrolyte non-random-two-liquid(eNRTL) equations were used for correlation, showing similar deviations.The ternary VLE was also modeled with the correlation from two data sets, with the mole fractions of ethanol on IL-free basis being 0.1 and approximate 0.98.The VLE data were also reproduced satisfactorily.With the eNRTL model, the root-mean-square deviation for temperature is 0.79 K and that for vapor-phase mole fraction is 0.0094.The calculations are in good agreement with experimental data.The effect of the IL on the VLE behavior of the volatile components is also illustrated.

Key words: vapor-liquid equilibrium, eNRTL equation, ionic liquid, ethanol, activity coefficient, relative volatility

邓东顺, 汪如发, 章连众, 葛绮, 计建炳. Vapor-Liquid Equilibrium Measurements and Modeling for Ternary System Water+Ethanol+1-Butyl-3-methylimidazolium Acetate [J]. , 2011, 19(4): 703-708.

DENG Dongshun, WANG Rufa, ZHANG Lianzhong, GE Yun, JI Jianbing. Vapor-Liquid Equilibrium Measurements and Modeling for Ternary System Water+Ethanol+1-Butyl-3-methylimidazolium Acetate [J]. , 2011, 19(4): 703-708.

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Vapor-Liquid Equilibrium Measurements and Modeling for Ternary System Water+Ethanol+1-Butyl-3-methylimidazolium Acetate

Vapor-Liquid Equilibrium Measurements and Modeling for Ternary System Water+Ethanol+1-Butyl-3-methylimidazolium Acetate

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