Abstract
The solubility of carbon dioxide in the ionic liquids 1-butyl-3-methylimidazolium hexafluorophosphate and 1-nonyl-3-methylimidazolium hexafluorophosphate was measured at temperatures of 293.15 and 298.15. K and pressure up to 4. MPa using a stoichiometric phase equilibrium apparatus. The measured data for 1-butyl-3-methylimidazolium hexafluorophosphate were in good agreement with existing literature data and new solubility data were reported for 1-nonyl-3-methylimidazolium hexafluorophosphate. The measured data were correlated using the group contribution non-random lattice fluid equation of state (GC-NLF EoS) proposed by Lee and co-workers. The group parameters for CG-NLF EoS were slightly modified at limited range to accommodate recent experimental data and better prediction at high pressure and long alkyl chains.
Original language | English |
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Pages (from-to) | 251-255 |
Number of pages | 5 |
Journal | Fluid Phase Equilibria |
Volume | 306 |
Issue number | 2 |
DOIs | |
Publication status | Published - 2011 Jul 25 |
Bibliographical note
Funding Information:We gratefully acknowledge the financial support provided to this work by 21C Frontier Project ( CDRS:16-2008-00-012-00 ) from Ministry of Education, Science, and Technology, South Korea.
Keywords
- Carbon dioxide
- Ionic liquid
- Nonrandom lattice fluid equation of state
- Phase equilibrium
ASJC Scopus subject areas
- General Chemical Engineering
- General Physics and Astronomy
- Physical and Theoretical Chemistry