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- Title
Spectrokinetic study of the mechanism of NO reduction with propylene over ZrO in excess oxygen.
- Authors
Matyshak, V.; Il'ichev, A.; Sil'chenkova, O.; Sadykov, V.; Korchak, V.
- Abstract
It has been demonstrated by quantitative spectrokinetic measurements that, on the surface of zirconia stabilized as a tetragonal phase, the rate-limiting step of the selective catalytic reduction of nitrogen oxides (SCR of NO) with propylene is the interaction of surface nitrates with CH yielding organic nitro compounds. It is hypothesized that propylene reacts not with the nitrates themselves but with the activated complex NO whose structure is intermediate between the structures of the monodentate NO and NO species. Deep CH oxidation exerts an adverse effect on the rate of the SCR of NO with propylene, and the interaction between O and NO, which yields NO and NO stimulates further nitrogen reduction to N. The effect of the reaction between oxygen and ON−CH on the NO reduction rate is variable and is determined by the CH/NO ratio. A generalized scheme of the SCR of NO with propylene on the surface of ZrO partially stabilized as a tetragonal phase has been developed by comparing experimental data of this study and data available from the literature.
- Subjects
NITRIC oxide; REACTION mechanisms (Chemistry); CATALYTIC reduction; PROPENE; ZINC oxide; OXYGEN
- Publication
Kinetics & Catalysis, 2017, Vol 58, Issue 2, p198
- ISSN
0023-1584
- Publication type
Article
- DOI
10.1134/S0023158417020082