A comparison of NOx adsorption on Na, H and BaZSM-5 films

Perdana, Indra,1973Chalmers tekniska högskola,Chalmers University of Technology,Chalmers University of Technology, Department of Chemical Reaction Engineering (författare)

Validerad; 2007; 20070130 (ysko)
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 (30-350ºC) 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.

Creaser, Derek,1966Chalmers tekniska högskola,Chalmers University of Technology,Chalmers University of Technology, Department of Chemical Reaction Engineering(Swepub:ltu)bib-dercre (författare)
Öhrman, Olov (författare)
Hedlund, JonasLuleå tekniska universitet,Industriell miljö- och processteknik(Swepub:ltu)johe (författare)
Chalmers tekniska högskolaChalmers University of Technology, Department of Chemical Reaction Engineering (creator_code:org_t)

Ingår i:Applied Catalysis B: Environmental: Elsevier BV72, s. 82-910926-33731873-3883

Av författaren/redakt...: Perdana, Indra, ...; Creaser, Derek, ...; Öhrman, Olov; Hedlund, Jonas

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