SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2018, Vol. 26 ›› Issue (7): 1513-1521.doi: 10.1016/j.cjche.2018.02.001

• Chemical Engineering Thermodynamics • 上一篇    下一篇

Densities and surface tensions of ionic liquids/sulfuric acid binary mixtures

Tao Zhang, Jing Hu, Shengwei Tang   

  1. Multi-phase Mass Transfer and Reaction Engineering Lab, School of Chemical Engineering, Sichuan University, Chengdu 610065, China
  • 收稿日期:2017-11-09 修回日期:2018-01-28 出版日期:2018-07-28 发布日期:2018-08-16
  • 通讯作者: Shengwei Tang,E-mail address:tangdynasty@scu.edu.cn E-mail:tangdynasty@scu.edu.cn
  • 基金资助:

    Supported by the National Natural Science Foundation of China (21576168, 21276163).

Densities and surface tensions of ionic liquids/sulfuric acid binary mixtures

Tao Zhang, Jing Hu, Shengwei Tang   

  1. Multi-phase Mass Transfer and Reaction Engineering Lab, School of Chemical Engineering, Sichuan University, Chengdu 610065, China
  • Received:2017-11-09 Revised:2018-01-28 Online:2018-07-28 Published:2018-08-16
  • Contact: Shengwei Tang,E-mail address:tangdynasty@scu.edu.cn E-mail:tangdynasty@scu.edu.cn
  • Supported by:

    Supported by the National Natural Science Foundation of China (21576168, 21276163).

摘要: The densities and surface tensions of[Bmim] [TFO]/H2SO4,[Hmim] [TFO]/H2SO4 and[Omim] [TFO]/H2SO4 binary mixtures were measured by pycnometer and Wilhelmy plate method respectively. The results show that densities and surface tensions of the mixtures decreased monotonously with increasing temperatures and increasing ionic liquid (IL) molar fraction. IL with longer alkyl side-chain length brings a lower density and a smaller surface tension to the ILs/H2SO4 binary mixtures. The densities and surface tensions of the mixtures are fitted well by Jouyban-Acree (JAM) model and LWW model respectively. Redlich-Kister (R-K) equation and modified Redlich-Kister (R-K) equation describe the excess molar volumes and excess surface tensions of the mixtures well respectively. Adding a small amount of ILs (χIL < 0.1) into sulfuric acid brings an obvious decrease to the density and the surface tension. The results imply that the densities and surface tensions of ILs/H2SO4 binary mixtures can be modulated by changing the IL dosage or tailoring the IL structure.

关键词: Ionic liquid, Sulfuric acid, Density, Surface tension, Excess property

Abstract: The densities and surface tensions of[Bmim] [TFO]/H2SO4,[Hmim] [TFO]/H2SO4 and[Omim] [TFO]/H2SO4 binary mixtures were measured by pycnometer and Wilhelmy plate method respectively. The results show that densities and surface tensions of the mixtures decreased monotonously with increasing temperatures and increasing ionic liquid (IL) molar fraction. IL with longer alkyl side-chain length brings a lower density and a smaller surface tension to the ILs/H2SO4 binary mixtures. The densities and surface tensions of the mixtures are fitted well by Jouyban-Acree (JAM) model and LWW model respectively. Redlich-Kister (R-K) equation and modified Redlich-Kister (R-K) equation describe the excess molar volumes and excess surface tensions of the mixtures well respectively. Adding a small amount of ILs (χIL < 0.1) into sulfuric acid brings an obvious decrease to the density and the surface tension. The results imply that the densities and surface tensions of ILs/H2SO4 binary mixtures can be modulated by changing the IL dosage or tailoring the IL structure.

Key words: Ionic liquid, Sulfuric acid, Density, Surface tension, Excess property