Sulfide Removal From RFCC Gasoline by Attapulgite Desulfurizer

The desulfurizer for RFCC gasoline was prepared by the impregnating technique,in which the transitional metal Fe series and Ag series compounds were used as active components and the modified attapulgite clay as the carrier.The optimum conditions of the preparation and the desulfurization for RFCC gasoline of the desulfurizer were obtained by the orthogonal test.The compositions of sulfur compounds in RFCC gasoline before and after desulfurization were determined by gas chromatography-atomic emission detection(GC-AED) method and the element composition of the modified attapulgite clay was analyzed.The results indicated that with the desulfurizer made by 11%Fe series compound and 1%Ag series compound on attapulgite clay acidified by 3% nitric acid and roasted at 400℃ for 1.5 h,the sulfur mass fraction in RFCC gasoline was reduced from 804 μg/g to 154 μg/g,and the desulfurization rate was 80.85%,in which the removal rate of thiol and thioether could reach about 100%,and the removal rate of thiofuran could reach 36.45%.