Phase equilibrium studying for the supercritical fluid extraction process using carbon dioxide solvent with 1.35 mole ratio of octane to ethanol mixture

Supercritical fluid extraction is a clean environmental chemical engineering process that has been given an interest to many researchers worldwide. The assessment of the feasibility of the extraction process utilizing a near critical solvent would be speeded up if it is possible to predict solubility data. Solubility data were measured for carbon dioxide with a mole ratio 1.35 of octane to ethanol using a phase equilibrium loading re-circulating high-pressure type apparatus at pressures up to 100 bar and at temperature 75 °C. The experimental data were then compared with calculated theoretical data which is calculated form the regular solution equations. A thermodynamic procedure is employed to each phase by applying activity coefficient expressions related to interaction parameters which are dependent on the pressure.