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A comparison of NOx adsorption on Na, H and BaZSM-5 films
Chalmers University of Technology, Department of Chemical Reaction Engineering.
Chalmers University of Technology, Department of Chemical Reaction Engineering.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.
2007 (English)In: Applied Catalysis B: Environmental, ISSN 0926-3373, E-ISSN 1873-3883, Vol. 72, no 1-2, p. 82-91Article in journal (Refereed) Published
Abstract [en]

NOx adsorption in ZSM-5 films containing Na+, H+ or Ba2+ as counter ions was studied. NaZSM-5 films showed a superior NOx adsorption capacity over the entire temperature range (30-350 °C) in comparison with the other films. Besides the possibility to form strongly bound surface nitrate species, the presence of the Na+ ions in ZSM-5 resulted in a large enhancement of various weakly adsorbed species. In the HZSM-5 film, the NOx adsorption was mainly due to physisorption, surface nitric acid and nitrosium ion (NO+) formation. Besides weakly adsorbed species and surface nitric acid, the NOx adsorption in BaZSM-5 films also resulted in formation of strongly bound surface nitrate species. The nitrate species in the BaZSM-5 film were found to be resistant to NO exposure and were mainly formed through an NO2 disproportionation pathway.

Place, publisher, year, edition, pages
2007. Vol. 72, no 1-2, p. 82-91
National Category
Chemical Process Engineering
Research subject
Chemical Technology
Identifiers
URN: urn:nbn:se:ltu:diva-7278DOI: 10.1016/j.apcatb.2006.09.016Local ID: 59e6a580-d7b2-11db-a1bf-000ea68e967bOAI: oai:DiVA.org:ltu-7278DiVA: diva2:980167
Note

Validerad; 2007; 20070130 (ysko)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-02-06Bibliographically approved

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