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Influence of Potassium Doping on the Activity and the Sulfur Poisoning Resistance of Soot Oxidation Catalysts

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Abstract

Soot oxidation on potassium nitrate impregnated cerium oxide and manganese cerium mixed oxide was investigated using TG-FTIR. It was found, that potassium nitrate promotes the soot oxidation by enhancing the contact between the soot and the catalyst, as soot ignition temperature corresponds to the melting point of potassium nitrate for both the individual and the mixed oxide. Since potassium nitrate is easier sulfatized than cerium or manganese, the susceptibility of the catalyst to sulfur poisoning is considerably decreased.

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Authors and Affiliations

  1. Paul Scherrer Institute, CH-5232, Villigen PSI, Switzerland

    Kirill Tikhomirov, Oliver Kröcher & Alexander Wokaun

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  1. Kirill Tikhomirov
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  2. Oliver Kröcher
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  3. Alexander Wokaun
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Correspondence to Oliver Kröcher.

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Tikhomirov, K., Kröcher, O. & Wokaun, A. Influence of Potassium Doping on the Activity and the Sulfur Poisoning Resistance of Soot Oxidation Catalysts. Catal Lett 109, 49–53 (2006). https://doi.org/10.1007/s10562-006-0055-5

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  • DOI: https://doi.org/10.1007/s10562-006-0055-5

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