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- Title
Cobalt Species Active for Nitrous Oxide (N<sub>2</sub>O) Decomposition within a Temperature Range of 300-600°C.
- Authors
Khan, Naseer A.; Kennedy, Eric M.; Dlugogorski, Bogdan Z.; Adesina, Adesoji A.; Stockenhuber, Michael
- Abstract
This article presents a novel study of the role of the catalyst support towards the formation of active cobalt sites for N2O conversion reactions within a temperature range of 300-600°C. These reactions were examined in a fixed bed tubular reactor. ZSM-5 (Si/ Al=15), TS-1, and amorphous silicates were used as catalyst supports for cobalt loadings. All catalysts were prepared by following standard methods and recipes. In general, cobalt loading on supports was varied between 0.78 and 5.40wt.-% (as determined from inductively coupled plasma (ICP) analysis). ICP, temperature programmed desorption, X-ray diffraction, and N2adsorption/desorption isotherms were used for the characterization of prepared catalysts. Cobalt on ZSM-5 support generates weak and strong acid sites. Furthermore, for the Co-ZSM-5 catalyst, prepared by a wet deposition method, the N2O decomposition reaction is first order with an activation energy of ~132 kJmol-1. Co2+ and Co3+ are the suggested active species for the N2O conversions in the studied range of temperatures.
- Subjects
NITROUS oxide; COBALT; X-ray diffraction
- Publication
Australian Journal of Chemistry, 2017, Vol 70, Issue 10, p1138
- ISSN
0004-9425
- Publication type
Article
- DOI
10.1071/CH17172