Abstract
Solubilities of five aromatic compounds in supercritical carbon dioxide are calculated by using the Patel-Teja equation of state. Unlike the traditional van de Waals mixing rules, the energy parameter of the equation of state is evaluated by equating the excess free energy calculated by the equation of state to that from a UNIFAC group contribution liquid model. New UNIFAC group interaction parameters of carbon dioxide and various hydrocarbons groups are obtained through regression of experimental vapor-liquid equilibrium data. A new mixing rule for the excluded volume parameter of the equation of state is proposed, and a generalized correlation of that parameter is presented
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