화학공학소재연구정보센터
Chemical Engineering Journal, Vol.140, No.1-3, 173-182, 2008
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 degrees 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. (c) 2007 Elsevier B.V. All rights reserved.