Vapour‐Liquid Equilibrium in Binary Aqueous Mixtures using a Modified Regular Solution Model

Phase equilibrium in binary mixtures of interest in wine and must distillation processes have been modelled using the Peng‐Robinson equation of state. The mixing rules of Kwak and Mansoori and of Wong and Sandler were used. A new simple modification of the Regular Solution model for binary mixtures is also presented. The cases studied considered nine water+congener mixtures. The congeners included in the study are those regarded as legal compounds by the Chilean legislation for the production of a spirit made from grapes, called Pisco. The work allows concluding on the advantages, disadvantages and expected accuracy of the models used.