Hydrodesulfurization of Dibenzothiophen with MoO3/TiO2 Catalyst
LIU Jin-long ZHU Yin-hua YANG Zhu-hong WANG Hai-tang LU Xiao-hua FENG Xin WANG Huai-yuan
State Key Laboratory of Materials-oriented Chemical Engineering, Nanjing University of Technology State Key Laboratory of Materials-oriented Chemical Engineering, Nanjing University of Technology State Key Laboratory of Materials-oriented Chemical Engineering, Nanjing University of Technology State Key Laboratory of Materials-oriented Chemical Engineering, Nanjing University of Technology College of Chemical Engineering, Nanjing University of Technology College of Chemical Engineering, Nanjing University of Technology Chemical Engineering Department, Daqing Petroleum Institute
Abstract:Mesoporous titania whiskers were used as MoO3 hydrodesulfurization catalyst support. The novel support was impregnated with ammonium heptamolybdate [(NH4)6Mo7O24×4H2O] solution at different concentrations, and MoO3/TiO2 catalyst with different MoO3 loadings was obtained. The catalyst was characterized by XRD, N2 adsorption-desorption and SEM, the one with higher dispersion of MoO3 was chosen for dibenzothiophene hydrodesulfurization. And the influences of reaction conditions and stability of MoO3/TiO2 catalyst on dibenzothiophene hydrodesulfurization of the chosen catalyst were tested in a fixed-bed reactor. Dibenzothiophene conversion rate could approach 100% under reaction temperature 280~300℃, hydrogen pressure 2.0 MPa, hydrogen/oil ratio 600 and LHSV 4 h-1. Furthermore, there was no obvious evidence of deactivation of the catalyst after running for a long time of over 1000 h.