A Oxidative Desulfurization System for Diesel Fuels with hydrogen peroxide in the Presence of Solid Acid Catalysts

摘要

This work presents the results obtained in the development of phosphotungstic acid/semi-coke catalysts in the oxidative desulfurization (ODS) process of diesel fuel using hydrogen peroxide as the oxidizing agent. Phosphotungstic acid /semi-coke prepared by impregnation. The effects of the amount of catalyst used, two phase volume ratio, reaction temperature , on the efficiency of desulfurization were investigated. At the optimal operation condition, the sulfur level of the desulfurized diesel can be lowered from about 1300 ppm to below 50 ppm after oxidation and extraction at 333 K and under atmospheric pressure, 96% of the sulfur could be removed from the diesel oil.. Phosphotungstic acid /semi-coke catalysts can be used repeatedly. In addtion. the diesel after oxidation and extraction was analyzed by GC-FPD for sulfur content. The chromatograph shows that virtually all the sulfur containing compounds in diesel were removed.