Analysis of ionic liquid PVT behavior with a Modified Cell Model

Hiroshi Machida, Ryosuke Taguchi, Yoshiyuki Sato, Richard L. Smith

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)


High pressure pure component pressure-volume-temperature (PVT) properties of ionic liquids are summarized and analyzed with a Modified Cell Model (MCM) that uses characteristic parameters, T*, V* and P*. The model was found to provide good fits of 28 different ionic liquid PVT data consisted with 14 types cation and 10 types anion over a wide range of temperatures (278-473 K) and pressures (0.1-200 MPa). The characteristic parameters of the model could be correlated with simple functions of the Bondi van der Waals volume for the cation and anion of each ionic liquid. Generalized parameters for MCM with the van der Waals volume are proposed that allow calculation of ionic liquid densities at high pressures to within an average deviation of 1.9%.

Original languageEnglish
Pages (from-to)127-132
Number of pages6
JournalFluid Phase Equilibria
Issue number2
Publication statusPublished - 2009 Jul 25


  • Correlation
  • Equation of state
  • High pressure densities
  • Ionic liquids

ASJC Scopus subject areas

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


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