Document Type : Regular Article
Laboratoire de Dynamique, Interactions et Réactivité des Systèmes, Faculty des Sciences Appliquées, Université Kasdi Merbah Ouargla, BP 511 Ouargla, Algeria
Laboratoire de Recherche en Génie Civil, Hydraulique, Développement Durable et Environnement, Université Mohamed Khider, Biskra, Algeria
This paper describes our interest on the ethanol separation and the enhancement of the obtained interaction parameters. The binodal curves and tie-lines data for the ternary systems (Water +Ethanol + 1-Octanol), (Water + Ethanol +4-Methyl-2-pentanone) and (Water + Ethanol + Ethyl Acetate) at 293.15K were investigated. These ternary systems follow a type-1 Liquid-Liquid equilibrium diagram. Furthermore, the extraction capabilities of these solvents in this study were tested using the separation factor (S) which was found greater than 1 in all ternary systems (S varying between 3.52 and 18.37). Besides, the values of the distribution coefficient (D) of ethanol were also not constant over the entire composition of the two-phase region (D values varied between 0.777 and 0.928), which confirms the extraction of ethanol. The ternary system (Water + Ethanol + Ethyl Acetate) was found to be the best option in terms of the distribution coefficient and separation factor. Othmer-Tobias and Hand plots have properly tested the reliability of the experimental tie-line data. In addition, non-random two-liquid model was used to correlate the experimental data, the model parameters were obtained using genetic algorithm, and there was a strong agreement between the experimental and calculated tie-lines with RMSD values below 1.72%.