Preparation and Characterization of an AB2O4 Spinel type oxide. Catalytic application of the supported CuFe2O4 solid

JULIA TASCA; CLAUDIA QUINCOCES; ANA ALVAREZ; MARÍA GLORIA GONZÁLEZ

Journal of Argentine Chemical Society

Año: 2009

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The supported Cu ferrite was obtained by impregnation of the supports with Cu and Fe nitrates solutions and adding citric acid, for calcination temperatures between 150 and 700ºC.  The propane combustion was used as reaction test. The catalytic activity was determined in a fixed bed flow reactor at programmed temperature, with a flow of 100 cm3/min containing a mixture of oxygen 4% and propane 1000 ppm. The addition of 500 ppm of NO in the feed resulted in different effects in the reaction. The zeolitic catalysts demonstrated to be active for the reduction of NO to N2,as well as for the oxidation of propane to CO2.  The ferrite supported on Al2O3 only showed activity for the propane oxidation to CO2. For both materials, the propane conversion, in presence of NO in the feed, is shifted towards lower temperatures suggesting that the hydrocarbon activation is modified by the presence of NO.