IN-SITU HIGH-TEMPERATURE FTIR STUDIES OF NOX REDUCTION WITH PROPYLENEOVER CU ZSM-5 CATALYSTS/

Citation
Va. Bell et al., IN-SITU HIGH-TEMPERATURE FTIR STUDIES OF NOX REDUCTION WITH PROPYLENEOVER CU ZSM-5 CATALYSTS/, Catalysis letters, 29(1-2), 1994, pp. 15-26
Citations number
30
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
15 - 26
Database
ISI
SICI code
1011-372X(1994)29:1-2<15:IHFSON>2.0.ZU;2-Q
Abstract
High temperature in situ FTIR has been used to investigate the surface species present on Cu/ZSM-5 during the reduction of NO(x) with propyl ene in a lean environment. Parallels have been observed between adsorb ed surface species and catalytic activity for this reaction. Species d etected at low temperatures are not representative of those detected a t high temperatures where the catalyst is active. An oxidized nitrogen -containing species has been observed at 2580 cm-1 on Cu during reacti on conditions (400-degrees-C). In contrast, at low temperatures, where the catalyst is less active, coke and Cu+(-)CO predominated. The effe cts of Cu weight loading, C/NO ratio, reaction temperature, and cataly st deactivation by steaming have been investigated with IR.