SOLUBILITY CALCULATION OF AROMATIC COMPOUNDS IN SUPERCRITICAL CO_2 BY GROUP CONTRIBUTION METHODS

摘要

Solubility calculation of aromatic compounds in supercritical CO_2 is presented using Peng-Robinson equation of state applied in a predictive way with UNIFAC group contribution activity coefficient model incorporated in its mixing rules using LCVM procedure. This is an alternative way when no experimental data on solubility is available. Experimental solubility data of naphthalene, 2,3-dimethylnaphthalene, anthracene, biphenyl, diclorobiphenyl, 2-naphthol and benzoic acid in SC-CO_2 is used to validate this methodology. The results show satisfactory agreement between calculated and experimental solubility values.