A series of trimetallic Ni–Mo–W catalysts supported on cubic mesoporous silica (SBA-16) modified with Ti were prepared with the aim to study the effect of Ti incorporation method (sol-gel against pore volume post-synthesis impregnation) on the physical and chemical properties of the synthetized materials. The catalytic behavior of the sulfided catalysts was evaluated in the reaction of hydrodesulfurization (HDS) of dibenzothiophene (DBT). The catalyst characterization by variety of techniques demonstrated that one-pot synthesis led to Ti ions incorporation into SBA-16 structure and an increase of acidity whereas the post-synthesis method led to formation of octahedral Ti species decorating support's surface. The catalytic behavior was closely linked with the characteristics of their oxide precursors. The catalysts prepared by sol-gel method demonstrated to be more effective toward S-removal from DBT than the catalyst modified by post-synthesis method. The initial HDS activity of the best NiMoW/S16–Ti catalyst doubled that of NiMoW/SBA-16 and a commercial NiMo/γ-Al₂O₃ which was linked with its better textural properties, acidity and adequate active phases dispersion. The main effect of the support modification with Ti was the enhancement of selectivity toward HYD route products. The best hydrogenation selectivity was archived by Ti incorporation via post-synthesis method which was linked to the formation of curved Mo(W)S₂ layers having a large amount of “brim” HYD sites.

制备了一系列用Ti改性的负载在立方介孔二氧化硅（SBA-16）上的三金属Ni-Mo-W催化剂，目的是研究Ti掺入方法（溶胶-凝胶对合成后孔隙体积浸渍的影响）。合成材料的物理和化学性质。在二苯并噻吩（DBT）的加氢脱硫（HDS）反应中评估了硫化催化剂的催化行为。通过各种技术对催化剂进行表征表明，一锅法合成导致Ti离子掺入SBA-16结构中并增加了酸度，而后合成方法导致形成了八面体Ti物种，从而装饰了载体的表面。催化行为与其氧化物前体的特性密切相关。通过溶胶-凝胶法制备的催化剂显示出比通过后合成方法改性的催化剂更有效的从DBT中去除S。最好的NiMoW / S16-Ti催化剂的初始HDS活性是NiMoW / SBA-16和市售NiMo /γ-Al的两倍₂ O ₃与其更好的质地，酸性和足够的活性相分散有关。用Ti改性载体的主要作用是增强了对HYD途径产物的选择性。最佳的氢化选择性是通过后合成方法通过掺入Ti来实现的，该方法与形成具有大量“边缘” HYD位点的弯曲Mo（W）S ₂层有关。