Resumo

DURAN, F. G.; CADUS, L. E.  e  BARBERO, B. P.. Iron-manganese mixed oxide catalysts for ethanol combustion: Influence of the fe:mn atomic ratio and the calcination temperature. Lat. Am. appl. res. [online]. 2012, vol.42, n.3, pp. 217-221. ISSN 0327-0793.

A Fe-Mn mixed oxide catalyst for ethanol combustion was optimized using different Fe:Mn atomic ratios and varying the calcination temperature (500°C, 650°C and 800°C). The results indicated that the increase of the calcination temperature caused a decrease of the catalytic activity due to a strong decrease of the specific surface area. Then, among the catalysts calcined at 500°C, the most active one was the catalyst with lower amount of iron. The results of X-ray diffraction (XRD) and temperature programmed reduction (TPR) indicated that a small amount of iron in the Fe-Mn mixed catalyst favored the formation of dispersed surface amorphous MnOx species. These species are easily reducible and very active in total oxidation reactions.

Palavras-chave : Total Oxidation; Ethanol; Catalyst Preparation.