Abstract
Experimental proofs of a free radical mechanism in methane oxidative coupling, with homolytic rupture of the CH bond are given. High concentrations of free radical sites are produced by mechanical milling of SiO 2. A study of C 1C 3alkanes interaction with these sites allows to simulate the, processes of alkanes oxidation and oxidative dehydrogenation. The reactivity of ethane and propane is higher than that of methane in accordance with the Polanyi-Semenov rule. Oxidative dehydrogenation of ethane is studied on Cd-containing zeolites. CH 4, C 2H 6 and C 3H 8 oxidative dehydrogenation by O 2 or CO 2 is studied on a MNO/SiO 2 catalyst. The initiation of radical reactions of hydrocarbons on Cl-containing catalysts proceeds via chlorine atoms generation.
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