CATALYTIC REDUCTION OF NO BY PROPENE IN THE PRESENCE OF OXYGEN OVER MECHANICALLY MIXED-METAL OXIDES AND CE-ZSM-5

Citation
C. Yokoyama et M. Misono, CATALYTIC REDUCTION OF NO BY PROPENE IN THE PRESENCE OF OXYGEN OVER MECHANICALLY MIXED-METAL OXIDES AND CE-ZSM-5, Catalysis letters, 29(1-2), 1994, pp. 1-6
Citations number
15
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Chemistry Physical
Journal title
ISSN journal
1011-372X
Volume
29
Issue
1-2
Year of publication
1994
Pages
1 - 6
Database
ISI
SICI code
1011-372X(1994)29:1-2<1:CRONBP>2.0.ZU;2-1
Abstract
The mechanical mixing of Mn2O3 or CeO2 to Ce-ZSM-5 considerably enhanc ed the rate of the reduction of NO by propene in the low to medium tem perature region, although Mn2O3 or CeO2 itself was much less active fo r this reaction. In contrast, Mn2O3 was highly active and CeO2 was mod erately active for the oxidation of NO to NO2. On the basis of the com parison of the rates of the C3H6 + O2, NO + C3H6 + O2 and NO2 + C3H6 O2 reactions over these catalysts, a bifunctional mechanism is propos ed, in which Mn2O3 and CeO2 accelerate the oxidation of NO and the sub sequent reaction steps between NO2 and propene proceed on Ce-ZSM-5.