(427d) Modeling the Solubilities of Binary Mixed Solids in Supercritical Carbon Dioxide
The following binary mixtures of solids along with their experimental solubilities in SCO2 [1,2] were considered here for modeling purposes: naphthalene + phenantrene, palmitic acid + capsaicin, palmitic acid + Î²-carotene, palmitic acid + tocopherol, capcaicin + Î²-carotene, capsaicin + tocopherol, and Î²-carotene + tocopherol. The performance of the present modeling approach was assessed during the prediction of the solubilities of the aforementioned solid mixtures in SCO2 using only binary energy interaction parameters (ki,j for the PR CEoS and Ïi,j for the Flory-Huggins model) previously regressed from experimental solubilities of each solid in SCO2 at 35 and 55 Â°C, and at pressures from 101 up to 363 bar. The correlating results obtained here were highly satisfactory for the majority of the binary mixtures (solid + CO2) considered in this study. The extrapolative abilities of the proposed approach were also verified in the direct prediction of observed solubility data of each of the seven binary mixtures of solids in SCO2 under study merely using the binary interaction parameters previously obtained during the correlation process.
 Arenas-Quevedo et al., J. Chem. Eng. Data, 62, 3861 (2017)
 Arenas-Quevedo, M.G.; âEstudio de la solubilidad de compuestos sÃ³lidos de valor agregado en productos naturales utilizando fluÃdos supercrÃticosâ, D. Sc. Thesis, ESIQIE-IPN, Mexico City (2018).