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为了更好地认识加氢脱硫和催化加氢反应中的载体影响和助剂效应 ,在同样的催化剂制备方法及反应条件下 ,研究了噻吩加氢脱硫 (HDS)和四氢萘催化加氢 (HYD)反应 .结果表明 ,对于无助剂的Mo和W催化剂 ,载体对催化活性的影响顺序为TiO2 Al2 O3>ZrO2 >Al2 O3.助剂的添加改变了催化剂活性顺序 .Ni助剂催化剂的活性明显高于Co助剂催化剂 .ZrO2 担载的添加Ni的Mo和W催化剂分别获得了最佳的HDS和HYD活性 .然而 ,添加Pt的Mo和W催化剂其HDS和HYD活性仅是Pt与Mo(W)二者的加和 ,Pt与Mo(W )之间没有协同效应 .先将担载的Mo和W预硫化再将助剂引入体系的催化剂制备方法可以避免Ni和Co过早硫化形成类硫化镍 (或硫化钴 )物相 ,与采用螯合物分子方法制备的催化剂间有一定的相似性
In order to better understand the influence of carrier and additive effect in hydrodesulfurization and catalytic hydrogenation reactions, the effects of thiophene hydrodesulfurization (HDS) and tetrahydronaphthalene catalytic hydrogenation HYD) .The results showed that the order of the catalytic activity for the catalyst-free Mo and W catalysts was as follows: TiO2 Al2 O3> ZrO2> Al2 O3. The addition of the promoter changed the order of the catalyst activity. Which is obviously higher than that of Co promoter.The optimum HDS and HYD activities were obtained respectively for Ni-supported Mo and W catalysts supported on ZrO2.However, the activity of HDS and HYD of Pt and Mo doped Pt catalysts were only that of Pt and Mo ( W), there is no synergistic effect between Pt and Mo (W) .The catalyst prepared by the pre-vulcanization of Mo and W and the introduction of additives into the system can avoid the premature vulcanization of Ni and Co The nickel sulphide (or cobalt sulphide) phase has some similarity to the catalyst prepared by the chelate molecular method