Enhancement of NO-elimination activity of Co-silicate catalyst by high-temperature calcination in steam-containing air

H–Co-silicate having an MFI structure (CoMFI), calcined in steam-containing air at 800°C (CoMFI-800S), was characterized by XRD and diffuse reflectance electron absorption (EA). The calcination educed some of the Co ions from the CoMFI framework to make small clusters nearby. The CoMFI-800S performa...

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Bibliographic Details
Published in:Catalysis letters 1998-01, Vol.52 (3-4), p.139-144
Main Authors: KAGAWA, K, KON, S, IWAMOTO, S, INUI, T
Format: Article
Language:English
Subjects:
Catalysis
Catalysts: preparations and properties
Chemistry
Clusters
Exact sciences and technology
General and physical chemistry
High temperature
Reflectance
Roasting
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
Zeolites
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Summary:H–Co-silicate having an MFI structure (CoMFI), calcined in steam-containing air at 800°C (CoMFI-800S), was characterized by XRD and diffuse reflectance electron absorption (EA). The calcination educed some of the Co ions from the CoMFI framework to make small clusters nearby. The CoMFI-800S performance in NO elimination in the presence of excess O2 was compared with that of Co supported on siliceous MFI zeolite ([Co]SiMFI), Co supported on H–Co-silicate ([Co]CoMFI), and a physical mixture of CoMFI and [Co]SiMFI (Co+[Co]). The educed Co ions enhanced NO elimination due to the uniform and isolated dispersion of oxidized Co clusters.
ISSN:1011-372X
1572-879X
DOI:10.1023/A:1019096125665