Prediction of So2 Solubility in [Hmpy][Tf2n] Using Cosmo-Sac, Nrtl and Uniquac Models

In this study, the thermodynamic modeling of so2 solubility in [hmpy][tf2n] was investigated# the thermodynamic modeling approach of γ-ϕ was used for vapor-liquid equilibria# at first, liquid phase activity coefficient was calculated using cosmo-sac, nrtl and uiniquac activity model, and then, so2 solubility in ionic liquid was calculated at certain pressures and temperatures using flash calculations algorithm# vapor phase was considered in ideal state# calculated solubility was compared with experimental solubility data points and accuracy of activity models was evaluated through aard% parameter# finally, aard% was obtained for so2 solubility in [hmpy][tf2n] and its amount was reported for cosmo-sac, nrtl and uniquac equal to 11#52%, 7#85% and 4#59%, respectively# these values are indicating higher accuracy of nrtl and uniquac than cosmo-sac model# uniquac model shows slightly better result# it is imporatant to note that calculation in cosmo-sac model is independent of experimental solubility data#