关键词: SiO₂-0.1WO₃, 催化氧化, 苯并噻吩, 脱硫

Abstract: The W-modified SiO2 catalyst was prepared by the sol-gel method and characterized by X-ray diffraction(XRD), Fourier transform infrared spectroscopy(FT-IR), N2-adsorption specific surface area measurement(BET) and scanning electron microscopy(SEM). The catalytic oxidative desulfurization performance of benzothiophene(BT) over the catalyst taking the simulated oil of benzothiophene sulfur as feedstock, H2O2 as oxidant was studied. The effects of solvent, solvent dosage, reaction temperature, H2O2 dosage, catalyst dosage and reaction time on desulfurization performance of BT were investigated. The results show that the predominant phase of W in catalyst was WO3, the introduction of W led to reduction of the specific surface area of catalyst. Under the conditions of model oil sample 20mL, catalyst 0.04 g, H2O2 /S molar ratio of 8, acetonitrile/model oil volume ratio of 0.3:1, at 65 ℃, react for 60 min, the desulfurization ratio of BT reach to 99.6%.