Comparing Four Compound-specific Cohesion Factor Relationships for Soave Redlich Kwong Equation of State

Abstract

The approach described in one of our previous papers (Jr. Taiwan Inst. Chem. Eng., 41, pp. 570 578, 2010) was applied to the Soave Redlich Kwong equation of state to develop compound-specific parameters for four different types of cohesion factor models. Compoundspecific parameters for nearly 300 compounds are listed in the paper and can be utilized for the modelling of phase equilibrium of the mixtures of these compounds. Performance of the models was compared based on the accuracy in predicting various pure compound properties as well as vapour liquid equilibrium of binary systems. The modified Trebble Bishnoi (mGAS) type of cohesion factor model emerged as the best amongst the compared models. Generalization of compound-specific models was also done. These expressions would be useful in the absence of compound-specific parameters.