高活性镍基加氢催化剂制备研究

Preparation of highly active nickel base hydrogenation catalyst

高活性镍基加氢催化剂是以硅藻土为载体、镍为活性组分采用共沉淀法制备的催化剂。考察了硅藻土比表面积、镍与硅藻土质量比、催化剂前驱体煅烧温度、催化剂前驱体还原温度等条件对催化剂活性的影响。通过实验数据分析,最终确定了高活性镍基加氢催化剂的最佳制备条件:硅藻土比表面积为284.2 m2/g,镍与硅藻土质量比为0.8,催化剂前驱体煅烧温度为500℃,催化剂前驱体还原温度为600℃。在此条件下制备的镍基加氢催化剂最优,经过棕榈油加氢评价后碘值最小,说明催化剂活性最高。

Highly active nickel base hydrogenation catalyst was prepared by co-precipitation method.The catalyst took diato- mite as the carrier, and nickel as the active component.The influences of specific surface area of diatomite, Ni/diatomite mass ratio, catalyst precursor calcination temperature, and catalyst precursor reduction temperature etc.on the activity of catalyst were investigated.Through the analysis of experimental data, the optimal preparation conditions were confirmed as follows ： specific surface area of diatomite was 284.2 m2/g, Ni/diatomite mass ratio was 0.8, catalyst precursor calcination temperature was 500 ℃, and catalyst precursor reduction temperature was 600 ℃.Under the optimal conditions of the preparation of nickel base hydrogenation catalyst, iodine value of palm oil was the lowest.The catalyst activity was the highest.