Equation of state for square-well chain molecules with variable range II. Extension to mixtures

摘要: Abstract An equation of state (EOS) developed in our previous work for square-well chain molecules with variable range is further extended to the mixtures non-associating fluids. The volumetric properties binary small as well polymer blends can be predicted without using adjustable parameter. With one temperature-independent interaction parameter, satisfactory correlations experimental vapor–liquid equilibria (VLE) data normal fluid at low and elevated pressures are obtained. In addition, VLE n-alkane nitrogen + n-alkane high this EOS. phase behavior calculations on mixture solutions also investigated one-fluid mixing rule. equilibrium pressure solubility gas evaluated a single parameter good results calculated gas + polymer systems compared those from other equations state.