微波辐射磷钼酸铈盐催化柴油氧化脱硫研究

he oxidative desulfurization of model oil and straight-run diesel catalyzed by cerium phosphomolybdate under microwave radiation was studied. And comparison of desulfurization rates and recovery rates of diesel fuel under different extraction conditions was investigated. Under the same reaction conditions, the conversion rates of DBT and BT were 4.2 times and 3.8 times higher under microwave radiation heating than that of traditional heating, respectively. The conversion rates of DBT and BT could be up to 95.6 % and 74.8 % with 400 W microwave radiation and 70 ℃ for 2 h, respectively. Catalytic oxidation with the reaction conditions of m(catalyst)/m(diesel) 7.1 mg/g, the initial concentration of H2O2 0.44 mol/L, microwave power 400 w, reaction temperature 70 ℃ and reaction time 2 h, and then extracted once with ν(DMF)/ν(diesel) of 1/4, the desulfurization rate reached 69.6% with the recovery rate of 97.5%. When increasing the extraction times, the desulfurization rates increased, but the recovery rates of diesel declined obviously, and the high desulfurization rate and high recovery rate are contradictory for the oxidative desulfurization of diesel.