Unified catalytic oxidation–adsorption desulfurization for aromatic sulfur compounds with cyclohexanone peroxide over Ti-HMS

Three kinds of Ti-HMS zeolites have been synthesized by using different templates, and their catalytic performance was investigated in deep oxidation-adsorption desulfurization process. Various analysis techniques have been applied to investigate physical and chemical properties of the catalysts. Using cyclohexanone peroxide as an oxidant, the catalytic performance results show that Ti-HMS-12 exhibits highest desulfurization performance (99.9%) without solvents. Dibenzothiophene (DBT) was almost completely oxidized to the more polar DBT sulfone, which could be subsequently adsorbed on the Ti-HMS-12, achieving a unified processes of oxidative-adsorption desulfurization process. Furthermore, the catalyst was recycled for five runs with slight decreases in the catalytic performance and can be easily regenerated by methanol washing.