The benzene-oxygen reaction catalyzed by alkaline earth metal oxides was investigated in the temperature range 773-1,073K to understand the catalytic function of these oxides for hydrocarbon gasification. In the initial stage of reaction, CO, CO2, H2O, and biphenyl were concurrently produced. The consumption of CO and H2O by the water-gas shift reaction subsequently occurred to give CO2and H2. CO oxidation with O2hardly occurred in the course of the benzene-oxygen reaction because benzene was preferentially adsorbed on the MgO catalyst. These reaction sequences were compared with those in the benzene-oxygen reaction catalyzed by metallic nickel.
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