Solute influence on the high-pressure phase equilibrium of ternary systems with carbon dioxide and an ionic liquid

E. Kühne, E. Perez, Geert-Jan Witkamp, C. J. Peters*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

22 Scopus citations

Abstract

To study the potential of performing hydrogenation reactions in ionic liquid-CO2 media, the high-pressure phase equilibrium of the ternary system 1-butyl-3-methylimidazolium tetrafluoroborate (bmim[BF4]) + 4-isobutylacetophenone + carbon dioxide (CO2) has been investigated. Experiments were performed in the Cailletet apparatus in a temperature range from 278.15 up to 368.15 K while pressures up to 14 MPa were applied. In this system, not only liquid-vapor boundaries were found, but also at high CO2 concentrations liquid-liquid biphasic equilibrium occurred.11Additional experiments are in progress. These results will be presented in a subsequent contribution. A comparison between the experimental results of this work, the data collected for the binary system bmim[BF4] + CO2 and a ternary system with acetophenone as the solute shows that the type of solute added can dramatically change the phase behavior of the system.

Original languageEnglish (US)
Pages (from-to)27-31
Number of pages5
JournalJournal of Supercritical Fluids
Volume45
Issue number1
DOIs
StatePublished - May 1 2008

Keywords

  • Carbon dioxide
  • Ionic liquid
  • Phase equilibrium and ternary systems

ASJC Scopus subject areas

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

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