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Reduction of NO by C4 hydrocarbons on platinum in the presence of oxygen: influence of sulfur dioxide
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1997 (English)In: Journal of Catalysis, ISSN 0021-9517, E-ISSN 1090-2694, Vol. 172, no 1, p. 3-12Article in journal (Refereed) Published
Abstract [en]

The reduction of NO, in the presence of i-C4H10or i-C4H8and O2, catalyzed by a platinum foil, was studied in order to understand better the catalytic activity of platinum metal, free of any support or dispersion effects. The reaction products were analyzed by mass spectrometry, and the surface was characterized by X-ray photoelectron spectroscopy at different stages of the reaction. A correlation between the catalytic activity for NO conversion and the presence of adsorbed intermediates is demonstrated. The role of oxygen is interpreted as twofold: formation of active intermediates and deactivation of the surface. The effect of traces of sulfur dioxide in the reacting phase on the reduction of NO by isobutene was investigated. The influence of SO2is very much dependent upon its initial concentration in the gas phase. Low concentrations (<15 ppm) promote the reduction of NO, whereas higher levels poison the reaction by a surface site blocking effect.

Place, publisher, year, edition, pages
1997. Vol. 172, no 1, p. 3-12
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Fysik
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URN: urn:nbn:se:ltu:diva-3740DOI: 10.1006/jcat.1997.1811ISI: A1997YG93000002Scopus ID: 2-s2.0-0003081870Local ID: 192330d0-394b-11dd-8721-000ea68e967bOAI: oai:DiVA.org:ltu-3740DiVA, id: diva2:976600
Note
Upprättat; 1997; 20080613 (ysko)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2023-05-08Bibliographically approved

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Paul, Jan

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