HYDROTHERMAL SYNTHESIS OF WO3 NANORODS AND ITS CATALYTIC PERFORMANCE OF REMOVING DIBENZOTHIOPHENE

Abstract

Abstract: WO3 nanorods were prepared under hydrothermal conditions using sodium tungstate and ammonium nitrate as raw materials. Oxidative desulfurization reactions of model oil containing dibenzothiophene (DBT) were studied over WO3 nanorods catalyst and using H2O2 as oxidant. The effect of experimental conditions on desulfurization rate was investigated and the optimum reaction conditions were determined. Test results show that H2O2/WO3/CTAB system is effective to remove DBT. Using 5 mL of model oil with DBT mass fraction of 500 μg/g, under the conditions of WO3 nanorods amount of 0.01 g, H2O2/DBT molar ratio of 8, a reaction temperature of 70℃, a reaction time of 1.5 h, using N-N-dimethylformamide as extractant with an amount of 8 mL and an extraction time of 5 min, the removal rate of DBT reaches 100 %. The catalyst is recycled five times and without significant decrease in DBT removal rate.

Key words: WO3, oxidative desulfurization, dibenzothiophene , desulfurization mechanism

xiu-ping LI. HYDROTHERMAL SYNTHESIS OF WO3 NANORODS AND ITS CATALYTIC PERFORMANCE OF REMOVING DIBENZOTHIOPHENE[J]. Petroleum Processing and Petrochemicals, 2012, 43(11): 47-50.

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