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It is urgent to develop a new deep desulfurization process of fuels as the environmental pollution increases seriously. In this work, a series of Lewis acidic ionic liquids(ILs) [C_4~3MPy]Cl/n ZnCl_2(n=1, 1.5, 2, 3) were synthesized and used in extraction and catalytic oxidative desulfurization(ECOD) of the fuels. The effects of the Lewis acidity of ILs, the molar ratio of H_2O_2/sulfur, temperatures, and different substrates including dibenzothiophene(DBT), benzothiophene(BT) and thiophene(TS), on sulfur removal were investigated. The results indicated that [C_4~3MPy]Cl/3ZnCl_2 presented near 100% DBT removal of model oil under conditions of 323 K, H_2O_2/DBT molar ratio 6:1. Kinetics for the removal of DBT, BT and TS by the [C_4~3MPy]Cl/3ZnCl_2-H_2O_2 system at 323 K is first-order with the apparent rate constants of 1.1348, 0.2226 and 0.0609 h-1, and the calculated apparent activation energies for DBT, BT and TS were 61.13, 60.66, and 68.14 k J/mol from 298 to 308 K, respectively. After six cycles of the regenerated [C_4~3MPy]Cl/3Zn Cl_2, the sulfur removal had a slight decrease. [C_4~3MPy]Cl/3ZnCl_2 showed a good desulfurization performance under optimal conditions.
In this work, a series of Lewis acidic ionic liquids (ILs) [C_4 ~ 3MPy] Cl / n ZnCl_2 (n = 1, 1.5, 2 The effects of the Lewis acidity of ILs, the molar ratio of H 2 O 2 / sulfur, temperatures, and different substrates including dibenzothiophene (DBT), benzothiophene BT) and thiophene (TS) on sulfur removal were investigated. The results indicated that [C_4 ~ 3MPy] Cl / 3ZnCl_2 presented near 100% DBT removal of model oil under conditions of 323 K, H_2O_2 / DBT molar ratio 6: 1. Kinetics for the removal of DBT, BT and TS by the [C_4-3MPy] Cl / 3ZnCl_2-H_2O_2 system at 323 K is first-order with the apparent rate constants of 1.1348, 0.2226 and 0.0609 h-1, and the represented apparent activation activation energies for DBT, BT and TS were 61.13, 60.66, and 68.14 kJ / mol from 298 to 308 K, respectively. A fc six cycles of the regenerated [C_4 ~ 3MPy] Cl / 3Zn Cl_2, the sulfur removal had a slight decrease. [C_4 ~ 3MPy] Cl / 3ZnCl_2 showed a good desulfurization performance under optimal conditions.