苯加氢反应镍催化剂表面活性集团性质的研究

Study of active group properties of nickel catalysts for hydrogenation of benzene

用CS2 脉冲中毒法测定Ni/SiO2 催化剂表面上苯加氢反应的动力学性质 ,结合用H2吸附法测定的镍表面积数据 ,求出了苯加氢反应要求催化剂中Ni分散度随Ni含量减少而增加 ,分散度与Ni含量关系接近 4次方 .但分散度不影响催化反应的Ni原子组合数 ,K对Ni/SiO2 催化剂的影响也作了研究 ,K降低Ni/SiO2 对苯加氢反应的催化活性 ,但也不影响Ni原子组合数 .

The CS 2 pulse poisoning method was introduced to study the kinetic properties of hydrogenation of benzene on Ni/SiO 2 catalyst surfaces, when analyzed in conjunction with Ni surface area data from H 2 adsorption method, it was found that the dispersity of Ni catalysts increased when the content of Ni decreased. However, the dispersity was not influenced by the number of atoms participating in the catalytic reaction. The influence of K on Ni/SiO 2 catalysts was also studied. K decreased the catalytic activity of Ni/SiO 2 for hydrogenation of benzene, but it did not influence the number of Ni atoms participating in the reaction.