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A comparative study of the selective oxidation of NH3 to N2 over gold, silver and copper catalysts and the effect of addition of Li2O and CeOx

✍ Scribed by M.J. Lippits; A.C. Gluhoi; B.E. Nieuwenhuys

Publisher: Elsevier Science
Year: 2008
Tongue: English
Weight: 791 KB
Volume: 137
Category: Article
ISSN: 0920-5861
DOI: 10.1016/j.cattod.2007.11.021

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✦ Synopsis

This paper describes the selective oxidation of ammonia into nitrogen over copper, silver and gold catalysts between room temperature and 400 C using different NH 3 /O 2 ratios. The effect of addition of CeO x and Li 2 O on the activity and selectivity is also discussed. The results show that copper and silver are very active and selective toward N 2 . However the multicomponent catalysts: M/Li 2 O/CeO x /Al 2 O 3 (M: Au, Ag, Cu) perform the best. On all three metal containing catalysts the activity and selectivity is influenced by the particle size and the interaction between metal particles and support.

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