CO Oxidation Over Manganese Oxide Catalysts: Effect of Calcination Temperatures 


Vol. 17,  No. 1, pp. 41-47, Mar.  2011


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  Abstract

MnO2 catalysts were prepared by precipitation method using potassium manganate and manganese acetate. The effect of calcination temperatures of MnO2 catalysts for CO oxidation has been studied and their physicochemical properties werc studied by X-ray diffraction (XRD), N2 sorption, temperature programmed reduction of Hz (Hz-TPR), and temperature programmed desorption of CO (CO-TPD) techniques. MnOz calcined at 300°C catalyst has a large surface area 181 m2/g having a narrow pore size distribution at 9 nm. The results of XRD and H2-TPR showed that the catalysts calcined at different temperatures showed mixed oxidation statcs of Mn such as Mn4+ and Mn3+. CO-TPD showed that the quantity of CO2 desorbed was decreased with increasing the calcination temperatures. The catalytic activity over the catalyst calcined at 300 ℃ exhibited the highest conversion reaching to 100% at 200°C. H2O vapor showed an inhibiting effect on the efficiency of the catalyst because of co-adsorption with CO on the active sites of manganese oxide catalysts and the initial catalytic activity of CO oxidation could be regenerated by removing H2O vapor in the reactants.

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  Cite this article

[IEEE Style]

P. JH, K. YJ, C. KH, K. ES, S. CH, "CO Oxidation Over Manganese Oxide Catalysts: Effect of Calcination Temperatures," Clean Technology, vol. 17, no. 1, pp. 41-47, 2011. DOI: .

[ACM Style]

Park JH, Kim YJ, Cho KH, Kim ES, and Shin CH. 2011. CO Oxidation Over Manganese Oxide Catalysts: Effect of Calcination Temperatures. Clean Technology, 17, 1, (2011), 41-47. DOI: .

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한국연구재단 등재학술지