Solubilities of solids in supercritical fluids using dimensionally consistent modified solvate complex models

Solubilities of palmitic and stearic fatty acids in supercritical carbon dioxide

“…It is desirable to have temperature independent correlation constants for the prediction of solubilities in supercritical fluids because the solubilities can then be correlated at any other temperature. Therefore, a thermodynamic model based on the Peng-Robinson equation of state (PR EOS) with Kwak and Mansoori mixing rules [16][17][18][19], an equation based on dilute solution theory proposed by Mendez-Santiago and Teja [20] and a reformulated Chrastil equation [12] were used to correlate the experimental values of the solubility. In all the models, the correlation constants are temperature independent.…”

“…Carbon dioxide is commonly used due to properties such as near ambient critical temperature and a moderate critical pressure. Supercritical carbon dioxide (SCCO 2 ) finds applications in several industries particularly in the extraction of heat sensitive chemicals from natural products [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. The potential application of supercritical fluid technology in the fats and oil industry has been extensively studied.…”

“…Therefore, thermodynamic models with parameters that are temperature independent were chosen. Thus, models based on the PR EOS with Kwak and Mansoori rules [16][17][18][19], the Mendez-Santiago and Teja model [20] and the reformulated Chrastil equation [12] were considered in this study.…”

Measurement and correlation of quaternary solubilities of dihydroxybenzene isomers in supercritical carbon dioxide

“…Table 2 gives the parameters and the AARDs of the quaternary systems that have been considered in this study. The component with the highest solubility can be considered as the solute Table 2 Correlation parameters of quaternary solid mixtures obtained from model equation (12). …”

“…Models based on equations of state [9,10] have been developed but these demand critical properties that require group contribution techniques. Therefore, several empirical models such as the solvate complex models [11][12][13][14], association models [15,16] and density-based models [17][18][19] have been developed. However, these models cannot be used to correlate solid mixtures because they do not account for the concentration of the cosolute.…”