Abstract
By means of the pulse technique, the catalytic oxidation of ethylene and ethylene oxide over a supported silver catalyst were studied at 200 °C. The results obtained for the adsorption and reaction of oxygen and other reaction components suggested that the reaction occurs between gaseous ethylene and the oxygen which is firmly adsorbed at the silver surface, and that among the firmly adsorbed oxygen less firmly bound oxygen is favorable to form ethylene oxide whereas the oxygen which is more firmly bound is favorable to form carbon dioxide. Carbon dioxide is adsorbed on the latter type of oxygen and inhibits the further formation of carbon dioxide.
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