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metadata.dc.type: | Artigo de Periódico |
Title: | Co-ZSM-5 catalysts for N2O decomposition |
Other Titles: | Applied Catalysis B: Environmental |
Authors: | Cruz, R. S. da Mascarenhas, A. J. S. Andrade, Heloysa Martins Carvalho |
metadata.dc.creator: | Cruz, R. S. da Mascarenhas, A. J. S. Andrade, Heloysa Martins Carvalho |
Abstract: | The catalytic properties of cobalt containing ZSM-5 zeolites prepared by various methods were compared. TPR, XRD, N2-BET, XPS, FTIR and UV–vis spectroscopy were used for characterizing the samples. Well-dispersed cobalt oxide-like species and isolated Co2+ ions in charge compensation positions were found in the zeolite. Catalysts prepared using a single step cation exchange method showed high activity for N2O decomposition in a temperature range 300–550°C, in the presence of 0–5% O2, and high stability in the presence of 10% H2O to the feed. UV–vis spectra and TPR experiments indicated the presence of some cobalt oxides, not detected by DRX, in a Co-ZSM-5 catalyst containing 3.76 wt% Co, prepared by a solid-state reaction procedure. The N2O conversion over this catalyst was strongly affected by addition of both O2 and H2O to the feed. |
Keywords: | Nitrous oxide decomposition Co-ZSM-5 catalyst Cation exchange Oxygen tolerance Water vapor tolerance |
URI: | http://www.repositorio.ufba.br/ri/handle/ri/8145 |
Issue Date: | 1998 |
Appears in Collections: | Artigo Publicado em Periódico (Química) |
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File | Description | Size | Format | |
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Cruz.pdf Restricted Access | 219,72 kB | Adobe PDF | View/Open Request a copy |
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