Coupling the capabilities of different complexing agents into deep eutectic solvents to enhance the separation of aromatics from aliphatics

Hizaddin, H.F. and Sarwono, M. and Hashim, M.A. and AlNashef, I.M. and Hadj-Kali, M.K. (2015) Coupling the capabilities of different complexing agents into deep eutectic solvents to enhance the separation of aromatics from aliphatics. The Journal of Chemical Thermodynamics, 84. pp. 67-75. ISSN 0021-9614

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Abstract

(Liquid + liquid) extraction of ethylbenzene from n-octane by using tetrabutylammonium bromide-based deep eutectic solvents (DESs) containing pyridine, ethylene glycol, or a mixture of both complexing agents was investigated at 25 degrees C and atmospheric pressure. The performance of each DES was determined from the distribution ratio and selectivity values calculated using experimental (liquid + liquid) equilibrium data of the ternary systems ethylbenzene + n-octane + DESs. The DES with only ethylene glycol had a high selectivity but a low distribution ratio, whereas the DES with only pyridine had a high distribution ratio but a low selectivity. For the other DESs, adding pyridine increased the distribution ratio, and increasing the molar ratio of ethylene glycol increased the selectivity. Generally, whenever the selectivity increased, the distribution ratio decreased, and vice versa. The nonrandom two-liquid model was used to correlate the experimental data, and the average root mean square deviation (RMSD) between correlated and experimental tie lines was 1.4. Moreover, the Conductor-like Screening Model for Real Solvents was successfully used to predict the ternary tie lines for the studied systems with an average RMSD of 3.7. (C) 2015 Elsevier Ltd. All rights reserved.

Item Type: Article
Additional Information: Cb9om Times Cited:0 Cited References Count:46
Uncontrolled Keywords: Deep eutectic solvent; (Liquid + liquid) extraction; Aromatic/aliphatic separation; COSMO-RS prediction; NRTL modeling
Subjects: T Technology > T Technology (General)
T Technology > TP Chemical technology
Divisions: Faculty of Engineering
Depositing User: Mr Jenal S
Date Deposited: 04 Sep 2015 03:50
Last Modified: 04 Sep 2015 03:50
URI: http://eprints.um.edu.my/id/eprint/13949

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