Development of a group contribution method for determination of viscosity of ionic liquids at atmospheric pressure

Farhad Gharagheizi, Poorandokht Ilani-Kashkouli, Amir H. Mohammadi, Deresh Ramjugernath, Dominique Richon

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

In this study, a wide literature survey has been carried out to collect an extensive set of liquid viscosity data for ionic liquids (ILs). A data set consisting of 1672 viscosity values and comprising 443 ILs was collated from 204 different literature sources. Using this data set, a reliable group contribution method has been developed. The method employs a total of 46 sub-structures in addition to the temperature to predict the viscosity of ILs. In order to differentiate the effects of the anion and cation on the viscosity of ILs, 24 sub-structures related to the chemical structure of anions, and 22 sub-structures related to the chemical structure of cations were implemented. The proposed model produces a low average relative deviation (AARD) of less than 6.4% taking into consideration all 1672 experimental data values.
Original languageEnglish
JournalChemical Engineering Science
Volume80
Pages (from-to)326-333
ISSN0009-2509
DOIs
Publication statusPublished - 2012

Bibliographical note

Highlights:
- A data set consisting of 1672 viscosity values and comprising 443 ILs was collated from the literature.
- A reliable group contribution method has been developed using this dataset.
- The method employs a total of 46 sub-structures in addition to the temperature to predict the viscosity of ILs.
- Twenty four sub-structures related to anions, and 22 sub-structures related cations were implemented.
- The model produces very encouraging results.

Keywords

  • Viscosity
  • Ionic liquids
  • Group contribution
  • Model
  • Database
  • Estimation

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