TY - JOUR
T1 - Phase equilibria of toluene/heptane with tetrabutylphosphonium bromide based deep eutectic solvents for the potential use in the separation of aromatics from naphtha
AU - Kareem, Mukhtar A.
AU - Mjalli, Farouq S.
AU - Hashim, Mohd Ali
AU - Hadj-Kali, Mohamed K.O.
AU - Bagh, Fatemeh Saadat Ghareh
AU - Alnashef, Inas M.
N1 - Funding Information:
The authors present their gratitude for the University of Malaya Center for Ionic Liquids for hosting the research activities at their labs. This research was funded by University of Malaya research grant number HIR-MOHE D000003-16001 and by the Deanship of Scientific Research at King Saud University through group project No. RGP-VPP-108 in collaboration with the Petroleum and Chemical Engineering Department, engineering faculty in Sultan Qaboos University, Oman.
PY - 2012/11/15
Y1 - 2012/11/15
N2 - In this work, new solvents are introduced to conduct the task of removing aromatic hydrocarbons from the feed stream to ethylene cracker. Liquid-liquid equilibrium (LLE) data for ternary systems of toluene and heptane with two newly introduced deep eutectic solvents (DESs) were estimated experimentally at 40, 50 and 60. °C and atmospheric pressure. The DESs are made from tetrabutylphosphonium bromide as salt and either ethylene glycol or sulfolane as hydrogen bond donor (HBD). The reliability of the LLE data were ascertained by applying the Othmer-Tobias and Hand correlations. The non-random two liquid (NRTL) model was used to correlate the experimental tie-lines and to calculate the phase compositions of the ternary systems. The results showed a very good agreement between calculated and experimental compositions. Further LLE data are presented to estimate the improvement of the separation by changing the salt:HBD molar ratio used to synthesize the DES at 30, 40, 50 and 60. °C. This work illustrates the possibility of applying these two DESs as solvents for this extraction task.
AB - In this work, new solvents are introduced to conduct the task of removing aromatic hydrocarbons from the feed stream to ethylene cracker. Liquid-liquid equilibrium (LLE) data for ternary systems of toluene and heptane with two newly introduced deep eutectic solvents (DESs) were estimated experimentally at 40, 50 and 60. °C and atmospheric pressure. The DESs are made from tetrabutylphosphonium bromide as salt and either ethylene glycol or sulfolane as hydrogen bond donor (HBD). The reliability of the LLE data were ascertained by applying the Othmer-Tobias and Hand correlations. The non-random two liquid (NRTL) model was used to correlate the experimental tie-lines and to calculate the phase compositions of the ternary systems. The results showed a very good agreement between calculated and experimental compositions. Further LLE data are presented to estimate the improvement of the separation by changing the salt:HBD molar ratio used to synthesize the DES at 30, 40, 50 and 60. °C. This work illustrates the possibility of applying these two DESs as solvents for this extraction task.
KW - Aromatics separation
KW - Deep eutectic solvents
KW - Ionic liquids analogues
KW - Liquid-liquid extraction
KW - Phosphonium salts
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U2 - 10.1016/j.fluid.2012.07.020
DO - 10.1016/j.fluid.2012.07.020
M3 - Article
AN - SCOPUS:84864813817
SN - 0378-3812
VL - 333
SP - 47
EP - 54
JO - Fluid Phase Equilibria
JF - Fluid Phase Equilibria
ER -