The generalized NRTL model associated with the peng-robinson equation of state to predict liquid-liquid equilibria between hydrocarbons, water and ethylene glycol

In this study, the generalized NRTL model is combined with the Peng-Robinson equation of state in order to predict the liquid-liquid equilibrium of binary systems containing hydrocarbons, water and glycols. In the proposed model, the binary interaction parameters of the NRTL model are predicted by means of a group contribution method, while the volume and surface-area parameters of pure components introduced in the generalized NRTL version are estimated from the UNIFAC group contribution method. The results obtained in this paper are compared with those provided by well known models described in the literature.