General Form of the Cross-Energy Parameter of Equations of State

摘要: Phase equilibrium calculations with cubic equations of state are sensitive to mixing and combining rules employed. In this work, we present a suitable general form the rule for cross-energy parameter, often considered be key property in phase calculations. The proposed is derived from molecular considerations, namely, London−Mie theory. typically used geometric mean (GM) other can deducted expression different values parameter n, which attractive tail Mie potential. We show that using n as variable instead commonly employed kij offers useful insight into behavior large number asymmetric systems including gas/alkanes, polymer solutions blends, alcohol/alkane gas/solid systems.