ASPEN plus simulation of liquid–liquid equilibria data for the extraction of aromatics from waste tyre pyrolysis gasoline using organic and deep eutectic solvents: a comparative study

Abstract Waste tyre pyrolysis gasoline (WTPG) contain significant amount of aromatics such as benzene, toluene and xylenes (BTX) thus provide a good source for these value-added chemicals. Separation from aliphatic media obtained in WTPG naphtha is done commercially by solvent extraction using volatile organic solvents sulfolane (SUF), dimethylformamide (DMF) diethylene glycol (DEG). The high cost this state-of-the art separation method environmental consideration have necessitated search non-volatile green deep eutectic (DES). This study intends to conduct comparative evaluation the performance five (SUF, DMF, DEG, two DESs) BTX WTPG. DESs are choline chloride/ethylene (DES1) chloride/glycerol (DES2) molar ratios 1:2. An ASPEN plus simulation was carried out generate liquid–liquid equilibria (LLE) data pseudo-ternary systems {WTPG + (SUF/DMF/DEG/DES)}. Performance based on selectivity ( S ) solute distribution coefficient D ). propriety protocol validated literature data. results revealed following maximum values coefficients solvents: DES2 = 378.283, 0.656); DES1 77.364, 1.423); SUF 55.371, 0.756); DMF 25.336, 0.786) DEG 17.531, 0.793). therefore performed better than can suitably replace same waste gasoline.