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《Acta Petrolei Sinica(Petroleum Processing Section)》 2010-02
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EFFECTS OF TiO_2 ON HYDRODESULFURIZATION PERFORMANCE OF Ni-Mo/MCM-41

WU Chunlei1,LI Xiang1,2,WANG Anjie1,2 (1.State Key Laboratory of Fine Chemicals,Dalian University of Technology,Dalian 116012,China;2.Liaoning Key Laboratory of Petrochemical Technology and Equipments,Dalian 116012,China)  
TiO2 modified Ni-Mo/MCM-41 hydrodesulfurization(HDS) catalysts were prepared by a consecutive impregnation method,and the effects of TiO2 as well as its introduction order on the HDS performance of Ni-Mo/MCM-41 were studied by using a model fuel of decalin containing 0.8% DBT.The UV-Vis,TPR and NH3-TPD results indicated that both the coordination states,the reducibility as well as the surface acidity of the oxidic precursor of Ni-Mo/MCM-41 were not remarkably affected by the introduction of TiO2.The HDS results showed that the addition of TiO2 suppressed the direct desulfurization pathway(DDS) activity of Ni-Mo/MCM-41,but significantly enhanced its hydrogenation pathway(HYD) activity,leading to an enhanced global HDS activity.The promoting effect was more pronounced when TiO2 was introduced after the impregnation of Ni-Mo over MCM-41.On the base of the product compositions,it is suggested that the improved HYD and HDS activities of TiO2-containg Ni-Mo/MCM-41 catalysts may be attributed to the enhanced acidity of the sulfides.
【Fund】: 国家自然科学基金重点基金(20333030);; 国家自然科学基金青年基金(20503003);; 国家自然科学基金(20773020);; 辽宁省中青年学科带头人和教育部博士点专项基金项目资助
【CateGory Index】: O643.36;TE621
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