Kinetic model of parallel self‐poisoning in the catalytic hydrogenolysis of ethane on single‐type surface sites

Abstract

A kinetic model for parallel competitive self-poisoning in the catalytic hydrogenolysis of ethane has been developed. It is assumed that molecular hydrogen is the bond-splitting agent in the rate-determining step, and self-poisoning itself is reversible. In addition, all active surface sites are taken to be of the same kind. The model provides a satisfactory account of the experimentally observed kinetic behavior. ~~ . .... . .On a mis au point un modkle cinCtique pour I'auto-empoisonnement cornpetitif parallble dans I'hydrogenolyse catalytique de I'Cthane. On suppose que l'hydrogbne moliculaire est I'agent de bris des liaisons dans I'Ctape determinant la vitesse et que I'auto-empoisonnement est riversible. En outre, tous les sites de surface actifs apparaissent de m&me nature. Le modele rend compte de manikre satisfaisante du comportement cinktique observe expkrimentalement.