Calculation of the solid solubilities in supercritical carbon dioxide using a new Gex mixing rule

摘要: Abstract The aim of this study is to develop a new EOS/G ex -type mixing rule with special attention calculating the solid solubilities aromatic hydrocarbons, aliphatic carboxylic acids, and heavy alcohols in supercritical carbon dioxide. A volume correction term applied combination second third virial coefficients which equation for coefficient quadratic, according suggestion by Hall Iglesias-Silva. In study, cubic Peng–Robinson (PR) Soave–Redlich–Kwong (SRK) equations state have been used calculate 23 solutes CO 2 , using six rules, namely, Wong–Sandler (WS) rule, Orbey–Sandler (OS) van der Waals one fluid (VDW1) two (VDW2) adjustable parameters, covolume dependent (CVD) rule. all cases, NRTL model was chosen as excess Gibbs free energy model. binary interaction parameters rules EOSs (PR SRK EOSs) determined 100 data sets systems over wide range temperatures pressures covering more than 970 experimental points are reported literature. results show that PR EOS accurate other solubility calculations regressed system, without any further modification, were then extended four ternary mixtures, giving satisfactory .