SBA-15 supported molybdenum oxide towards efficient catalytic oxidative desulfurization: effect of calcination temperature of catalysts

ABSTRACT

The phosphomolybdic acid has been successfully supported on functionalized ionic liquid (IL) modified mesoporous silica SBA-15. Subsequently, the obtained products were calcined at different temperatures. The oxidative desulfurization of model fuel containing benzothiophene, dibenzothiophene or 4,6-dimethyldibenzothiophene has been carried out with HPMo-IL/SBA-15 calcined at various temperatures. Based on desulfurization rate and cost, the optimum calcination temperature of HPMo-IL/SBA-15 catalyst was around 400 °C. More molybdenum oxide active sites were shown by the decomposition of the IL at the higher temperature, which caused better desulfurization performance.

KEYWORDS:

• Oxidation
• desulfurization
• catalyst
• calcination temperature

Acknowledgement

The author would like to acknowledge Jiangsu University, which provided the assistence in catalysts characterization of this paper.

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was financially supported by the National Natural Science Foundation of China [grant number 21606113], [grant number 21646001], [grant number 21376109]; State Key Laboratory of Heavy Oil Processing [grant number SKLOP201402004].