Abstract: A catalyst [(C4H9)4N]4H[PW11CuO39] was prepared by one-step synthesis method and its structure was characterized by FT-IR and UV techniques. Using model oil (thiophene in n-octane) as feed and 30% hydrogen peroxide as oxidant, the oxidative desulfurization tests were carried out and the effects of catalyst dosage, the ratio of oxidant to feed, reaction temperature and reaction time on the desulphurization were investigated. The test results showed that under the optimum reaction conditions of a catalyst dosage of 4% (the mass ratio of catalyst to model oil), a molar ratio of effective oxygen in oxidant to the sulfur in oil of 2.5, a reaction temperature of 60 ℃ and a reaction time of 120 min, the sulfur content of model oil could be reduced from 1 052 ng/ L to 33 ng/ L. The sulfur content of a catalytic cracked diesel fuel could be decreased from 4 100 ng/ L to 982 ng/ L under the basically same reaction conditions for model oil with an exception of a reaction temperature of 70℃.

Key words: heteropolyoxometalate, catalyst, catalytic oxidation, diesel fue, desulphurization