Correlation of the Binary Interaction Factor for Polar Solutes Dissolved in Supercritical Carbon Dioxide

Abstract

This contribution is focused on supercritical solutions of many polar solutes in carbon dioxide (nonpolar solvent) when the molar polarization of the solute at infinite dilution is accurately known. A database containing experimental solubility measurements for many solutes is used in this study where isotherms are known between 308 and 343 K. A mathematical model is developed to compute the solubility of solids in supercritical fluids, particularly in carbon dioxide. As a result, a new correlation of the binary interaction (kij) is proposed. This new relationship considers the kij term as a function of the dipole moment and the solute carbon number.