1987•OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information)Requires access
Decomposition of hydrogen peroxide vapor on oxide catalysts
A.Zh. Arutyunyan, Garnik L. Grigoryan, A.B. Nalbandyan
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Abstract
A study has been made of the decomposition of hydrogen peroxide vapor on Pyrex glass, SiO/sub 3/, ..gamma..-Al/sub 2/O/sub 3/, MgO, and CuO over temperatures ranging from 373 to 623 K for the interval of time for the flow to pass through the reactor, 10/sup -3/-10/sup -2/ sec, at a partial pressure of H/sub 2/O/sub 2/ of 0.072 kPa and a total pressure of the mixture of 0.53 kPa in a carbon dioxide atmosphere. It is shown that the decomposition of H/sub 2/O/sub 2/ onoxides is autoaccelerated. The effective activation energy of the process in the autoacceleration region is greater than at the fastest rates. The decomposition of H/sub 2/O/sub 2/ under these conditions is accompanied by the liberation of HO/sub 2/ radicals from the surface to the gas phase. The rate of H/sub 2/O/sub 2/ decomposition and generation of HO/sub 2/ radicals increases in the order: glass < SiO/sub 2/ < ..gamma..-Al/sub 2/O/sub 2/ < MgO < CuO.