Prediction of true critical temperature of multi-component mixtures: An extension to Chueh and Prausnitz method

Chueh–Prausnitz method was proposed in 1967 for prediction of vapor–liquid critical temperature of multi-component mixtures. In order to calculate true critical temperature by this method, a binary interaction parameter (τij) is required for each binary set of components in the multi-component mixtures. τij for a binary set is evaluated by considering experimental data on critical temperature of the binary mixture. As the data used in the original paper were published earlier than 1967, it is necessary to add more recent experimental data on critical temperature in order to extend prediction capability of this method. In the present study, 4070 experimental data on vapor–liquid critical temperature for 529 different binary systems has been collected by a comprehensive literature review and a new interaction parameter (τij) is introduced for each binary system. Besides, a set of correlations has been developed in order to estimate τij for different systems containing different chemical families. Finally, the capability of the extended methods has been evaluated for prediction of critical temperature of 205 multi-component mixtures. The prediction results show average absolute relative deviation (AARD) of 1.5% from experimental values of critical temperature.