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首页> 外文期刊>Catalysis Letters >Catalytic Combustion of Lean Methane at Low Temperature Over Palladium on a CoO_x-SiO2 Composite Support
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Catalytic Combustion of Lean Methane at Low Temperature Over Palladium on a CoO_x-SiO2 Composite Support

机译：Catalytic Combustion of Lean Methane at Low Temperature Over Palladium on a CoO_x-SiO2 Composite Support

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摘要

A composite support of CoO_x-SiO2 was obtained through modifying silica with cobalt of different loadings; with CoO_x-SiO2 as the support, a series of Pd/CoO_x-SiO2 catalysts were prepared for the combustion of lean methane at low temperature. The effects of CoO loading and palladium precursor on the catalytic performance of Pd/CoO_x-SiO2 were investigated. The Pd/CoO_x-SiO2 catalyst containing 20 wt CoO and 1 wt Pd with acetate as palladium precursor performs excellently in lean methane combustion; over it a complete conversion of methane can be achieved at 420 °C and the activity does not show any decline in a long-term test of 120 h. Various characterizations suggested that cobalt species are highly dispersed on the silica of high surface area and there exists a synergetic interaction between palladium and cobalt species, which improves the redox properties of Pd/CoCv-SiO2 and contributes to the excellent catalytic performance in lean methane combustion.

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