Structure and catalytic oxidative desulfurization properties of SBA-15 supported silicotungstic acid ionic liquid

A supported catalyst was synthesized on the mesoporous materials with ionic liquid modified by the silicontungstic acid (HSiW-IL/SBA-15). A series of characterization, such as XRD, N-2 adsorption desorption, SEM, TEM and XPS analysis showed that HSiW was successfully immobilized onto the IL modified SBA-15 and maintained the SBA-15 mesoporous structure. Compared with HSiW and HSiW/SBA-15, the catalyst HSiW-IL/SBA-15 had excellent catalytic activity for oxidative desulfurization of fuels. After analysis, the high activity of HSiW-IL/SBA-15 was attributed to the catalyst with large specific surface area, pore size and hydrophobic performance, which had a better wettability for fuel. The catalyst had a good recycling performance, and the sulfur removal still remained 96.4 % after eight times cycle.