Abstract
The predictive accuracy of the newly developed binary interaction parameter function L ij = L ij ( T,P,x i ) of Lielmezs and co-workers has been studied further by means of the Redlich-Kwong-Soave (RKS) and Peng-Robinson (PR) equations of state in the vapor-liquid equilibria calculations over a wide range of P-T-x-y values. Sets of coefficients for use in the binary interaction parameter function L ij = L ij ( T,P,x i ) have been established for 29 selected binary systems. The results calculated of the vapor-liquid equilibria (bubble point) for the binary systems considered (L-RKS, L-PR) are in excellent agreement with the experimental data and the values obtained using the F-function of two-parameter cubic equations of state (F-RKS, F-PR). The predictions made in this work (L-RKS, L-PR) have a slight edge over the results calculated via the original Redlich-Kwong-Soave (RKS) and Peng-Robinson (PR) methods.
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