Application Research Of Supported Metal Phthalocyanine In Catalytic Oxidation Desulfurization

At the beginning of the year of 2013, the haze weather, which appeared in the central and eastern china now and then, set off alarm bells for protecting the environment once again. Thus, reducing the content of sulfur in the fuels became an urgent problem to us. Conventional catalytic hydrodesulfurization(HDS) was difficult achieving deep desulfurization of fuels, oxidative desulfurization(ODS) technology has many advantages such as mild reaction conditions,simple te chniques and high desulfurization efficiency. Metal phthalocyanines(MPcs) were loaded on there carriers to prepare supported MPcs, which were applied in the research of catalytic oxidative desulfurization.A series of MPcs with different central metal ions and different kinds of substituent groups were synthesized by microwave method, and the MPcs were characterized and analyzed by UV-Vis and FT-IR, confirming that the MPcs were synthesized successfully.MPcs were loaded onto MCM-41 mesoporous molecular sieve by impregnation method to prepare MCM-41 loaded metal phthalocyanines(MPcs/MCM-41) catalyst. MPcs/MCM-41 were applied in research of catalytic oxidative desulfurization of fuels, and the optimal reaction conditions were determined by investigating the effects of different reaction conditions on the removal ratio of dibenzothiophene(DBT). Under the optimal conditions, the catalytic performance of FePcs/MCM-41 on different sulfur compounds was investigated. The results showed that FePcs/MCM-41 exhibited good sound effects on different sulfur compounds, however, the performance of FePcs/MCM-41 in reusing was weak.FePc was loaded onto bamboo charcoal(BC) by impregnation method to prepare FePcs/BC catalyst, which was characterized by SEM and FT-IR. DBT was oxidized with air as oxidant and FePc/BC as catalyst in ionic liquid, under room temperature and atmosphere. The influences of different reaction conditions on removal ratio of DBT were investigated and the oxidative product of DBT was analyzed and authenticated. The results showed that the removal ratio of DBT was up to 99.1% under the optimal reaction conditions and FePc/BC possessed good catalytic property in oxidative desulfurization of different sulfur compounds and real diesel. However, the desulfurization rate decreased gradually in the process of the reuse of FePc/BC.Titanium-silicium molecular sieve Ti-MCM-41 was synthesized and the FePcs with different substituent groups were loaded onto the modified Ti-MCM-41 by covalent bond to prepare FePcs(R)/Ti-MCM-41 photocatalyst. Fe Pcs(R)/Ti-MCM-41 were characterized by FT-IR 、 TG/DTG 、 XRD 、 SEM and BET. DBT was photo-oxidized with FePcs(R)/Ti-MCM-41 as photocatalyst, the air as oxidant and ionic liquid as extraction agent in the irradiation of visible light, under room temperature and atmosphere. The optimal reaction conditions were explored by simple variable method, and the oxidative product of DBT was DBTO2. The photocatalytic performance of FePc(NH2)/Ti-MCM-41 on different sulfur compounds and real diesel were also investigated under the optimal conditions. The results showed that FePc(NH2)/Ti-MCM-41 had a good photocatalytic performance in oxidative desulfurization of different sulfur compounds and real diesel. In addition, FePc(NH2)/Ti-MCM-41 possessed a good property of reusing.