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Catalytic reduction of nitric oxide over copper Part III: Influence of water vapour
KTH, School of Information and Communication Technology (ICT). (Materialfysik)
1999 (English)In: Journal of Molecular Catalysis A: Chemical, ISSN 1381-1169, E-ISSN 1873-314X, Vol. 138, no 2-3, 227-236 p.Article in journal (Refereed) Published
Abstract [en]

This paper reports on the effect of water vapour on the reduction of NO over copper in the presence of oxygen and isobutene. Reactions were studied at 700 K and at 770 K. Mass spectroscopy (MS) and X-ray photoelectron spectroscopy (XPS) were used to monitor the gas phase composition during reaction and to analyse the catalyst surface, respectively. XPS spectra show that the presence of water vapour influences the Cu oxidation state. At 700 K adsorption of aldehyde is partly blocked by copper oxide resulting in a decrease in the activity of the reaction, although the main mechanism is not changed. At 770 K, water vapour generates an even more oxidised surface, which promotes a complete oxidation of hydrocarbon, the main mechanism of NO reduction is changed, and the activity of the reaction is slightly increased. (C) 1999 Elsevier Science B.V. All rights reserved.

Place, publisher, year, edition, pages
1999. Vol. 138, no 2-3, 227-236 p.
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Natural Sciences
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URN: urn:nbn:se:kth:diva-84797DOI: 10.1016/S1381-1169(98)00135-6ISI: 000078114300013OAI: oai:DiVA.org:kth-84797DiVA: diva2:499641
Note
NR 20140805Available from: 2012-02-13 Created: 2012-02-13 Last updated: 2017-12-07Bibliographically approved

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