modeling high-pressure densities of ionic liquids

Accurate knowledge of liquid density is necessary for the development of industrial processes involving ionic liquids (ils)# in this work, a group contribution approach based on statistical associating fluid theory (saft-γ) is used to predict the high-pressure densities of some ils# the saft-γ parameters of some imidazolium-based ionic liquids with either [meso3], [meso4], [etso4] and [cf3so3] anions are optimized to experimental data within a temperature range of 293#15-393#15 k and pressures up to 35 or 60 mpa# moreover, by using the optimized group parameters, the performance of the model is examined by predicting the density of some il systems not included in the optimization database# the results show good agreement with experimental data#