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

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 develope...

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Bibliographic Details
Published in:Chinese journal of chemical engineering 2014, Vol.22 (1), p.79-88
Main Author: 周颖 林真 吴可君 徐国华 何潮洪
Format: Article
Language:English
Subjects:
Chemical engineering
Correlation
Deviation
Dielectric constant
Fluid dynamics
group contribution method
ionic liquid
Ionic liquids
Microfluidics
Reactors
static dielectric constant
关键参数
基团贡献法
微反应器
微流体装置
温度范围
离子液体
粘滞效应
静态介电常数
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Summary: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.
ISSN:1004-9541
2210-321X
DOI:10.1016/S1004-9541(14)60009-4