关键词: 模板剂, 复合载体, 加氢脱硫

Abstract: TiO2-Al2O3 complex support was prepared by modified sol-gel method and the influence of this complex support on the performance of MoP/TiO2-Al2O3 catalyst in hydrodesulfurization (HDS) was studied. The effects of different templates (dodecylamine and CTAB) and the dosage of template on the properties of the prepared complex support including crystal structure, specific surface area, pore structure, as well as catalytic performance were investigated. Results showed that templates affected the pore structure of the meso-porous complex support: smaller pore size and narrow pore size distributions were observed for sample prepared without template; sample prepared using dodecylamine as template exhibited larger pore volume, wider pore size and better pore size distributions than that of sample prepared with CTAB, which indicated that dodecylamine was effective on broadening pore size of the complex support. The TiO2-Al2O3 complex support having optimal specific surface area, pore volume and pore size could be obtained by using dodecylamine as template and with a mole ratio of dodecylamine to Al(NO3)3.9H2O of 0.5, and the catalyst prepared by said support exhibited the best HDS activity.

Key words: template, complex support, hydrodesulfurization