Modeling the solubilities of high molecular weight n-alkanes in supercritical carbon dioxide

Abstract

The Peng-Robinson equation of state with quadratic mixing rules and a single adjustable parameter was used to model the solubilities of various high molecular weight solid n-alkanes in supercritical carbon dioxide. The key conclusion of the study is that the adjustable parameter, k ij , varies linearly with the number of carbon atoms in the main chain of the n-alkane. Thus, the model can be used to predict the solubilities of various high molecular weight solid n-alkanes in supercritical carbon dioxide.