Modeling The Vapor-Liquid Equilibrium by Simplified SAFT Equation of State

In this work, simplified SAFT equation of state, similar to simplified PC-SAFT equation of state, have been applied to model vapor-liquid phase equilibrium of systems containing nonassociatingnonassociating, associating-nonassociating, and associating-associating compounds. The binary systems considered here are methane-propane, propane-benzene, methanol-pentane, propanolheptane, water-methanol, and water ethanol. Pure component radial distribution function has been used for mixtures in this simplified SAFT equation of state. Pure component parameters are identical for both SAFT equation of state and simplified SAFT equation of state. To model water, 3B association scheme and for methanol, ethanol, and propanol 2B association scheme have been employed. Considering a binary interaction parameter, a well agreement has been observed between modeling results from simplified SAFT equation of state for above mixtures and experimental data.