Viscosity of ionic liquid mixtures of 1-alkyl-3-methylimidazolium hexafluorophosphate+CO2

Daisuke Tomida, Satoshi Kenmochi, Kun Qiao, Quanxi Bao, Chiaki Yokoyama

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)


The viscosities of the mixtures 1-hexyl-3-methylimidazolium hexafluorophosphate ([HMIM][PF6])+CO2 and 1-octyl-3-methylimidazolium hexafluorophosphate ([OMIM][PF6])+CO2 were measured with a rolling ball viscometer. The CO2 mole fraction for one mixture ranged up to 0.434 and the other up to 0.447. The viscosities were measured at 293.15-353.15K and 10-20.0MPa. The experimental uncertainty in viscosity was estimated to be within ±3.0%. The experimental data were compared with McAllister's three-body model, which correlated with the experimental data within average absolute deviations of 5.9%.

Original languageEnglish
Pages (from-to)185-189
Number of pages5
JournalFluid Phase Equilibria
Issue number2
Publication statusPublished - 2011 Aug 25


  • 1-Hexyl-3-methylimidazolium hexafluorophosphate
  • 1-Octyl-3-methylimidazolium hexafluorophosphate
  • Carbon dioxide
  • Ionic liquid
  • Viscosity

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry


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