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Mechanism and Kinetics of the Selective NO Reduction over Co-ZSM-5 Studied by the SSITKA Technique: Part 1: NOX Adsorbed Species Formation Full article

Общее Language: Английский, Genre: Full article,
Status: Published, Source type: Original
Journal Journal of Catalysis
ISSN: 0021-9517 , E-ISSN: 1090-2694
Output data Year: 2001, Volume: 201, Number: 2, Pages: 159-168 Pages count : 10 DOI: 10.1006/jcat.2001.3256
Tags Co-ZSM-5 catalyst, Kinetics and mechanism of NO adsorption, SSITKA
Authors Sadovskaya E.M. 1 , Suknev A.P. 1 , Pinaeva L.G. 1 , Goncharov V.B. 1 , Balʹzhinimaev B.S. 1 , Chupin C. 2 , Mirodatos C. 2
Affiliations
1 Boreskov Institute of Catalysis, pr. Lavrentieva, 5, 630090, Novosibirsk, Russia
2 Institut de Recherches sur la Catalyse, 2 av. A. Einstein, F-69626 Villeurbanne Cedex, France

Funding (2)

1 Institute of Researches on Catalysis and Environment in Lyon
2 Russian Foundation for Basic Research 00-03-22004

Abstract: A steady-state isotopic transient analysis of NO adsorption over Co-ZSM-5 catalyst in the absence or in the presence of oxygen is reported by using doubly labeled nitric oxide. The kinetics and mechanism of NOX formation as well as the number of active sites for NO adsorption and their possible location on the catalyst surface are determined. The formation of NO2δ+ species, active intermediates in deNOX chemistry in the presence of oxygen and hydrocarbons, is shown to proceed according two sequential steps: (i) molecular oxygen adsorption and (ii) NO reaction with oxidized surface sites. The frequency factor of that reaction is found to be two orders of magnitude higher than that of mononitrosyls formation via the adsorption of NO on cobalt sites. The oxygen exchange within NO2δ+ is considerably slower than the formation of that intermediate species, indicating that its two oxygen atoms are nonequivalent. The concentration of active sites leading to NO2δ+ formation is also estimated and related to the interface existing between cobalt oxide clusters and zeolite framework.
Cite: Sadovskaya E.M. , Suknev A.P. , Pinaeva L.G. , Goncharov V.B. , Balʹzhinimaev B.S. , Chupin C. , Mirodatos C.
Mechanism and Kinetics of the Selective NO Reduction over Co-ZSM-5 Studied by the SSITKA Technique: Part 1: NOX Adsorbed Species Formation
Journal of Catalysis. 2001. V.201. N2. P.159-168. DOI: 10.1006/jcat.2001.3256 publication_identifier_short.wos_identifier_type publication_identifier_short.scopus_identifier_type publication_identifier_short.rinz_identifier_type
Dates:
Submitted: Feb 20, 2000
Accepted: Apr 19, 2001
Published print: Jul 25, 2001
Published online: May 25, 2002
Identifiers:
publication_identifier.wos_identifier_type WOS:000170172200001
publication_identifier.scopus_identifier_type 2-s2.0-0035743065
publication_identifier.rinz_identifier_type 14056796
publication_identifier.accession_number_identifier_type 2001:499032
publication_identifier.chemical_accession_number_identifier_type 135:294517
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