SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2014, Vol. 22 ›› Issue (1): 79-88.doi: 10.1016/S1004-9541(14)60009-4

• 化工热力学 • 上一篇    下一篇

A Group Contribution Method for the Correlation of Static Dielectric Constant of Ionic Liquids

周颖, 林真, 吴可君, 徐国华, 何潮洪   

  1. State Key Laboratory of Chemical Engineering, Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
  • 收稿日期:2012-08-16 修回日期:2012-11-06 出版日期:2014-01-05 发布日期:2014-01-04
  • 通讯作者: HE Chaohong E-mail:chhezju@zju.edu.cn
  • 基金资助:

    Supported by the National Natural Science Foundation of China (21176206) and the Project of Zhejiang Key Scientific and Technological Innovation Team (2010R50017).

A Group Contribution Method for the Correlation of Static Dielectric Constant of Ionic Liquids

ZHOU Ying, LIN Zhen, WU Kejun, XU Guohua, HE Chaohong   

  1. State Key Laboratory of Chemical Engineering, Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
  • Received:2012-08-16 Revised:2012-11-06 Online:2014-01-05 Published:2014-01-04
  • Contact: HE Chaohong E-mail:chhezju@zju.edu.cn
  • Supported by:

    Supported by the National Natural Science Foundation of China (21176206) and the Project of Zhejiang Key Scientific and Technological Innovation Team (2010R50017).

摘要: Static dielectric constant is a key parameter to estimate the electro-viscous effect which plays important roles in the flow and convective heat transfer of fluids with ions in microfluidic devices such as micro reactors and heat exchangers. A group contribution method based on 27 groups is developed for the correlation of static dielectric constant of ionic liquids in this paper. The ionic liquids considered include imidazolium, pyridinium, pyrrolidinium, alkylammonium, alkylsulfonium, morpholinium and piperidinium cations and various anions. The data collected cover the temperature ranges of 278.15-343.15 K and static dielectric constant ranges of 9.4-85.6. The results of the method show a satisfactory agreement with the literature data with an average absolute relative deviation of 7.41%, which is generally of the same order of the experimental data accuracy. The method proposed in this paper provides a simple but reliable approach for the prediction of static dielectric constant of ionic liquids at different temperatures.

关键词: ionic liquid, static dielectric constant, group contribution method

Abstract: Static dielectric constant is a key parameter to estimate the electro-viscous effect which plays important roles in the flow and convective heat transfer of fluids with ions in microfluidic devices such as micro reactors and heat exchangers. A group contribution method based on 27 groups is developed for the correlation of static dielectric constant of ionic liquids in this paper. The ionic liquids considered include imidazolium, pyridinium, pyrrolidinium, alkylammonium, alkylsulfonium, morpholinium and piperidinium cations and various anions. The data collected cover the temperature ranges of 278.15-343.15 K and static dielectric constant ranges of 9.4-85.6. The results of the method show a satisfactory agreement with the literature data with an average absolute relative deviation of 7.41%, which is generally of the same order of the experimental data accuracy. The method proposed in this paper provides a simple but reliable approach for the prediction of static dielectric constant of ionic liquids at different temperatures.

Key words: ionic liquid, static dielectric constant, group contribution method