Implementation of solvation free energy framework to predict the vapor-liquid equilibrium behaviors for the water–hydrazine and ethanol–water azeotropic systems

•A simulation methodology based on solvation thermodynamic framework was constructed to predict vapor-liquid equilibrium.•The liquid density and self-solvation free energy were used as training sets to refit the Coulomb and 12-6 Lennard-Jones parameters of molecular model.•The azeotropes of ethanol–water and water–hydrazine systems were represented, and an adding salt distillation of LiCl–water-ethanol system was well predicted.