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Characterization and reactivity of MoO3/SiO2 catalysts in the selective catalytic oxidation of ammonia to N2 |
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| Authors: | L Lietti G Ramis G Busca F Bregani P Forzatti |
| Affiliation: | a Dipartimento di Chimica Industriale ed Ingegneria Chimica “G. Natta”, Politecnico di Milano, P.zza L. da Vinci 32, 20133 Milan, Italy b Dipartimento di Ingegneria Chimica e di Processo “G.B.Bonino”, Facoltà di Ingegneria, Università di Genova, P.le Kennedy, 16129 Genoa, Italy c ENEL, Area generazione, via Reggio Emilia 39, Segrate, MI, Italy |
| Abstract: | Silica-supported MoO3 catalysts with MoO3 loadings up to 21% w/w were prepared, characterized and tested in the selective catalytic oxidation (SCO) of ammonia to N2 under dilute conditions. It is found that the catalysts are active and selective in the reaction, and that the catalytic performance increases on increasing the Mo loading. Crystalline MoO3, detected over the silica support, is supposed to be the active species in the reaction. The reactivity of the catalysts is depressed by water addition to the feed at low temperatures and is enhanced by the presence of selected promoters, like Bi and Pb. |
| Keywords: | MoO3/SiO2 catalysts Selective catalytic oxidation Ammonia oxidation |
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