Application of PRSV equation of state for prediction of the extraction of solid compounds using supercritical carbon dioxide

Prediction of solubilities of industrial solid compounds in supercritical carbon dioxide (SC-CO2) have been a challenge since the last two decades. In this study, the Peng-RobinsonStryjek-Vera equation of state (PRSV EoS) and the SoaveRedlich-Kwong equation of state (SRK EoS) were applied to estimate the solubilities of 10 common solid compounds in supercritical carbon dioxide. Simulation results showed that the PRSV EoS had good agreement with experimental data. Both EoS needed binary interaction parameter for prediction of phase behavior of solid-supercritical. In addition, with use of genetic algorithm, parameter for solid compounds and SCCO2 were calculated. Due to the lack of comprehensive correlations for prediction of solubilities of CO2 solids, in this work a correlation to predict the solubility of solid in SCCO2 was proposed. The main advantage of this correlation is its simplicity and having only two inputs, namely temperature and pressure. Minimum value of the average absolute percent deviation (AAPD) was for PRSV EoS and carbon dioxidenaphthalene system (2.77%) and maximum value of this parameter was for SRK EoS and carbon dioxide- anthracene system (19.38%).