| Sulfur oxide released from the combustion of fuel oils results in the serious environmental problems. As concerning about environment increases, more and more stringent regulations on sulfur content in oils are being implemented to mitigate those problems in many developed countires and China. Refining industries are trying their best to study how to remove sulfur compounds in gsoline efficiently. Physical and chemical methods can be adopted to desulfurization according to characters of sulfur compounds. Although conventional hydrodesulfurization (HDS) can effectively remove the majority of sulfur-containing compounds, it is difficult to achieve the ultra-deep desulfurization. A number of alternative technologies including adsorption, oxidation, extraction and bioprocessing are being explored to realize the ultra-deep desulfurization. The adsorption desulfurization is one of the most promising desulfurization methods.In this paper, the sulfur adsorptive removal performance of activated carbon treated by metal oxide, inorganic acid and oxidants from fluid catalytic cracking (FCC) gasoline was studied. The effects of preparation parameters and desulfurization conditions of adsorbent on sulfur removal efficiency were intensively discussed. And several analytical instrument were used to analyse adsorbents.Static developments were processed to value the desulfurization performences of adsorbent AC-CuO and AC-ZnO. The results showed that desulfurization performences of acticated carbon were increased after loaded with CuO or ZnO. The suitable static developments conditions were loading amount of CuO and ZnO, volume ratio of oil to adsorbent, adsorptiontion time, adsorption temperature were 3.0 wt. % and 4.0 wt. %; 1.0 and 1.0; 80℃and 80℃; 5.0h and 1.0h, respecively.The removal performance of sulfur compounds from FCC gasoline was evaluated using dynamic adsorption method. Effects of preparing conditions of adsorbent and operating parameters of fixed-bed reactor on sulfur removal efficiency were studied. The results showed that the sulfur compounds in FCC gasoline were effective to remove over the activated carbon supported non-noble metal. When loading amount of CuO, calcination temperature and time, adsorption temperature, space velocity and volume ratio of gasoline to adsorbent were 3.0wt. %, 350℃, 2.0 h, 120℃, 3.0h-1 and 1.0 respectively, sulfur removal efficiency was higher, which was 93.48%; When loading amount of ZnO, calcination temperature and time, adsorption temperature, space velocity and volume ratio of gasoline to adsorbent were 5.0wt. %, 350℃, 1.0 h, 120℃, 4.0h-1and 1.0 respectively, sulfur removal efficiency was higher, which was 91.51%. And regeneration by heat of AC-CuO and AC-ZnO were studied. Adsorption performances were studied after activated carbon loaded with NiO and MoO3 and the sulfur removal efficiency was hihger when loaded with NiO. Sulfur removal efficiency increased when desulfurization experiments were carried out in the hydrogen atmosphere.Effects of pretreated to activated carbon by inorganic acid and oxidants were discussed. Compared to sulfuric acid and phosophoric acid, nitric acid can improve the adsorptive ability of activated carbon greatly. And ammonium persulfate improved the adsorptive ability of activated carbon greatly than H2O2. When concentration of nitric acid, activation temperature, calcination temperature, and adsorption temperature were 65%, 80℃, 250℃, and120℃, respectively, sulfur removal efficiency was higher, which was 90.43%; When concentration of ammonium persulfate, activation temperature, calcination temperature, and adsorption temperature were 10%, 80℃, 250℃, and120℃, respectively, sulfur removal efficiency was higher, which was 92.13%.Compared with acticvated carbon-based adsorbents, alumina-based adsorbents showed the lower sulfur removal efficiency and adsorptive capability. After loaded with CuO and ZnO, sulfur removal efficiency was increased 3.70% and 1.36%, respectively.GC-FPD was used to detect the sulfur compounds in the FCC gasoline before and after desulfurization. GC-FPD chromatograms of gasoline desulfurized showed that most peaks were minimized and some peaks were eliminated. The results clearly showed that sulfur compounds in FCC gasoline were adsorbed by AC-based adsorbent. It was also showed that activated carbon treated by metal oxide ,inorganic acid and ammonium persulfate preferred to remove benzothiophene and its derivatives comparing with other sulfur compounds while activated carbon loaded with NiO and MoO3 showed different results.Experiments of TG-DTA showed that cupric nitrate and zinc nitrate can be calcined completely before 350℃. Activated carbon-based adsorbents and its used adsorbents reacted in two steps in the process of increasing temperature. Diffraction peaks of Cu2O was found in the pattern of AC-CuO calcined under 350℃and disappeared when calcination temperature increased to 700℃. And diffraction peaks of compounds with zinc were not found in the patterns of adsorbents before and after desulfurized.Surface acidic and basic group content of activated carbon-based adsorbents were analysed. The results showed that acidic group content was higher than basic group content in the surface of activated catbon. Surface acidic and basic group content of activated carbon increased after loaded with CuO and ZnO. After pretreated with nitric acid, acidic group content increased while basic group content decreased. After calcined or treaed by nric acid and ammonium persulfat, BET surface area, pore volume, average pore diameter and pore distributing were changed slightly.
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