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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 kinetic properties of benzene hydrogenation on the surface of Ni / SiO2 catalyst were determined by CS2 pulse poisoning method. Combined with the data of nickel surface area measured by H2 adsorption method, it was found that the hydrogenation of benzene required the decrease of Ni dispersion in the catalyst The relationship between Ni content and Ni content is close to the fourth power, but the dispersion does not affect the number of Ni atoms in the catalytic reaction. The effect of K on the Ni / SiO2 catalyst is also studied. K reduces the hydrogenation reaction of Ni / SiO2 on benzene Catalytic activity, but it does not affect the number of Ni atomic combination.