A generalized one‐parameter redlich‐kwong equation for vapor‐liquid equilibrium calculations

The two modified parameters previously proposed for the Redlich‐Kwong (RK) equation of state are simplified and reduced to a one‐parameter model, and extended to vapor‐liquid equilibrium (VLE) calculations involving supercritical components. However, the original RK parameters are still treated as temperature‐ and substance‐dependent. In this investigation, this parameter is generalized in terms of T r and Ω. The values obtained from the generalized correlation are suitable for calculating VLE data at T ≤ T c for all components, and at temperatures where some of the components are in the supercritical region. The validity of the generalized correlation is supported by its ability to represent saturated properties of the pure components and to predict VLE data for five binary systems at 58 isothermal conditions, and one ternary system at two isothermal conditions.