(590c) Modelling of Gas Solubilities in Certain Ionic Liquids Using a Group Contribution Equation of State
AIChE Annual Meeting
2009
2009 Annual Meeting
Engineering Sciences and Fundamentals
Thermophysical Properties of Ionic Liquids
Thursday, November 12, 2009 - 1:06pm to 1:24pm
This study presents the results of the thermodynamic modeling of gas solubilities in the homologous [-mim][Tf2N] family using a Group Contribution Equation of State (GC-EoS). The model parameters were estimated on the basis of 1400 experimental data points in the temperature range 278-460 K and pressures up to 45 bar. Results show that the GC-EoS is a suitable model to describe gas solubilities in this family of room temperature ionic liquids. The solubility of various gases like CO2, H2, CH4 and CO were studied. It was found that the IL-family under study has an excellent solvent power for CO2. However, the solubility of H2, CH4 and CO is very limited. Comparison with experimental data show excellent agreement with model predictions.