Measurement and correlation of infinite dilution partition coefficients of aromatic compounds in the ionic liquid 1-butyl-3-methyl-imidazolium hexafluorophosphate ([bmim][PF6])-CO2 system at temperatures from 313 to 353 K and at pressures up to 16 MPa

Hiroshi Machida, Yoshiyuki Sato, Richard L. Smith

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)

Abstract

Infinite dilution partition coefficients of benzene, toluene, chlorobenzene and naphthalene in the ionic liquid, 1-butyl-3-methyl-imidazolium hexafluorophosphate ([bmim][PF6])-CO2 system were measured with a chromatographic technique. Partition coefficients for each solute increased with increasing pressure and had the trend of Kbenzene > Ktoluene > Kchlorobenzene > Knaphthalene at a given temperature. At pressures above 12 MPa, Knaphthalene became one order in magnitude smaller than that of the other components, which is attributed to the π-π interactions between naphthalene and the imidazolium group of the ionic liquid. The Sanchez-Lacombe equation of state was found to provide adequate correlation of the data and their temperature and pressure trends.

Original languageEnglish
Pages (from-to)430-437
Number of pages8
JournalJournal of Supercritical Fluids
Volume43
Issue number3
DOIs
Publication statusPublished - 2008 Jan 1

Keywords

  • Ionic liquid
  • Partition coefficient
  • Sanchez-Lacombe equation of state
  • Supercritical CO

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

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