Influence of promoters on the performance of Au/MnOx and Pt/SnOx/SiO2 low-temperature CO oxidation catalysts |
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| Authors: | Gar B Hoflund Steven D Gardner David R Schryer Billy T Upchurch and Erik J Kielin |
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| Institution: | (1) Department of Chemical Engineering, University of Florida, 32611 Gainesville, FL, USA;(2) NASA Langley Research Center, 23665 Hampton, VA, USA;(3) Present address: Department of Chemical Engineering, Mississippi State University, P.O. Box 9595, 39762 Mississippi State, MS, USA |
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| Abstract: | The influence of promoters on Pt/SnOx/SiO2 and Au/MnOx low-temperature CO oxidation catalysts has been investigated under stoichiometric reaction conditions with no CO2 added to the feed gas. The performance of Pt/SnOx/SiO2 catalysts is improved significantly by the addition of 1 wt.% Fe but reduced by the addition of 5 wt.%Fe, 1 wt.% Sb, 5 wt.% Sb, 1 wt.% As, 5 wt.%As and 1.8 wt.% P. The performance of Au/MnOx is improved significantly by the addition of 1 at.% Ce but reduced by the addition of 1 at.% Co. For the catalysts and conditions examined, the Au/MnOx catalysts are superior to the Pt/SnOx/SiO2 catalysts with respect to both activity and decay characteristics. |
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| Keywords: | Low-temperature CO oxidation promoters platinized tin oxide gold on manganese oxide |
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