Immobilization of Acidic Ionic Liquid on Silica Gel for Catalytic Oxidative Desulfurization of Fuel Oils(II): Desulfurization

A series of highly dispersed ionic liquid catalysts were used for the oxidation desulfurization of dibenzothiophene (DBT) in model oil in the presence of H 2 O 2 . The effects of the loading of [BMIM]HSO 4 immobilized, reaction time, temperature, O/S molar ratio and the dosage of catalysts on DBT removal were investigated in detail. The catalyst with the loading of [BMIM]HSO 4 was 25% exhibited the highest activity. The DBT removal of model oil can reach 99.9% in 5 h at 60 °C, O/S molar ratio of 10, V model oil =10mL, m catalyst s =2.00g. The catalysts can be easily recycled and can be recycled 2 times without a significant decrease in activity.