Combustion of volatile organic compounds over supported manganese oxide. Influence of the support, the precursor and the manganese loading

FABIOLA N. AGUERO, ALBERTO SCIAN, BIBIANA P. BARBERO, LUIS E. CADUS

CATALYSIS TODAY

Elsevier

Año: 2008 vol. 133 p. 493 - 501

0920-5861

Manganese oxide catalysts supported on Al2O3 and Mg-Al2O3 composite were prepared from two different precursors, manganese acetate and manganese nitrate, with two manganese loadings. Catalytic performance was evaluated in ethanol combustion, which is a volatile organic compound used as solvent in print industries and a potential fuel for vehicles. The most active and selective catalysts to total oxidation were those prepared from manganese acetate. By means of a wide physicochemical characterization by XRD, XRF, XPS, TPR, Raman Spectroscopy, SEM, and specific surface areas measurements, it was found that the best catalytic performance was obtained when manganese oxide species are highly dispersed on the catalyst surface. The formation of these surface species depends mainly on the manganese precursor and also on the support and the manganese loading.