Abstract
The SAFT equation of state (EOS) combined with a one-parameter mixing rule was used to evaluate the capability of the SAFT approach for modeling the solubility of solid aromatic compounds in supercritical fluids (SCFs) with cosolvents. Binary interaction parameters were obtained by fitting the phase equilibrium data of the constituent binary systems. The SAFT EOS was used to predict the solubility of solids in carbon dioxide with cosolvents for five systems, and the overall average absolute relative deviation (AARD) was 20.43%. For the other 11 systems, the binary interaction parameters between the solids and the cosolvents were obtained by fitting the ternary solubility data, and the overall AARD was 16.45%. Comparison with the PRSV EOS showed that the SAFT EOS was superior in terms of both prediction and correlation. The present work demonstrates that the SAFT approach is useful for modeling the solubility of solids in SCFs with cosolvents with reasonable accuracy.
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