Mechanism of the formation of carbon oxides under conditions of the oxidative chlorination of methane: III. Kinetics of the reaction of CCl4 with oxygen on copper-containing salt catalysts

Abstract

The kinetics of the oxidative dechlorination of CCl4 on two supported catalysts for methane oxychlorination (CuCl2-KCl and CuCl2-KCl-LaCl3) at 350–425°C was studied using a gradientless method. Although these catalysts exhibited different activities, the rate of reaction on them was described by one exponential equation at the same activation energy of E ≈ 26.3 kcal/mol. A two-path reaction mechanism was proposed, which involved the dissociative adsorption of initial reactants and chlorine with the formation of phosgene and the oxidation of phosgene to CO2. The occurrence of two types of active sites on the catalyst surface was assumed.