Effect of Nickel Concentration Profile on Selectivity of Acetylene Hydrogenation

Abstract

The effect of the nickel concentration profile on the selectivity of acetylene hydrogenation was investigated by using nickel/alumina catalysts with different concentration profiles: egg shell of thin layer, egg shell of thick layer, uniform, and egg yolk. A model calculation of selectivity was also carried out. The selectivity of ethylene showed the following order: egg shell of thin layer > egg shell of thick layer > uniform > egg yolk. The result of the model calculation showed comparatively good agreement with the experimental results.