EXTENSION AND EVALUATION OF THE CHAIN-OF-ROTATOR GROUP-CONTRIBUTION EQUATION OF STATE FOR PREDICTION OF THERMODYNAMIC PROPERTIES OF POLAR AND NONPOLAR COMPOUNDS

In this paper, the parameters for the chain-of-rotator group contribut ion (CORGC) equation of state, which were recently reported by Pults e t al. (Pults, J.D., Greenkorn, R.A. and Chao, K.C., 1989. Chem. Eng. S ci., 44 (11): 2553 2564), have been revised. In addition, the ability of this equation to predict PVT properties of polar compounds and refr igerants is evaluated. For this reason parameters of the CORGC equatio n of state for these kinds of groups were obtained. Its ability to han dle vapour-liquid equilibria calculations was also tested. The interac tion parameters for unlike pairs of groups have also been determined. Comparisons between the predicted results and the experimental data fo r several pure fluids and their mixtures are presented. The accuracy a nd capability of CORGC with these new sets of parameters are also comp ared with other widely used equations of state.