Catalytic Reactions of Mixtures of Carbon Dioxide, Ethene, and Hydrogen on Cobalt Surfaces

摘要

Using a plug-flow and a batch reactor the hydrogenation of mixtures of carbon dioxide and ethene over unsupported cobalt has been studied. The results show that the hydrogenation of carbon dioxide is totally blocked as long as ethene is present in the gas phase. In contrast carbon dioxide does not at all influence the hydrogenation of ethene, which leads to a complex mixture of hydrocarbons. This reaction can be explained as a copolymerisation proceeding via two different monomers (C_1 and C_2 fragments). The observed oscillatory molar product distribution in dependence on the number of C atoms can exactly be described by means of a numerical model.