Activity Coefficient Models to Describe Isothermal Vapor-Liquid Equilibrium of Binary Systems Containing Ionic Liquids

Isothermal vapor-liquid equilibrium data of binary mixtures containing ionic liquids are correlated using three activity coefficient models: UNIQUAC, Wilson, and NRTL. Twenty binary systems taken from the literature were selected for this study. A genetic algorithm is used to determine the interaction parameters for the three models. The results given by the three models have been compared with experimental data, and show that the UNIQUAC model is the best method to correlate and predict the vapor-liquid equilibrium of this type of systems.