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Titolo:
Low-temperature CO oxidation over Co3O4/Al2O3
Autore:
Jansson, J;
Indirizzi:
Chalmers Univ Technol, Competence Ctr Catalysis, Dept Chem React Engn, S-41296 Gothenburg, Sweden Chalmers Univ Technol Gothenburg Sweden S-41296 41296 Gothenburg, Sweden
Titolo Testata:
JOURNAL OF CATALYSIS
fascicolo: 1, volume: 194, anno: 2000,
pagine: 55 - 60
SICI:
0021-9517(20000815)194:1<55:LCOOC>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
METAL-OXIDE SURFACES; SELECTIVE OXIDATION; LIGHT-HYDROCARBONS; CARBON-MONOXIDE; CATALYSTS; CO3O4; CHEMISORPTION; COMBUSTION; REDUCTION; STATES;
Keywords:
CO oxidation; low temperature; cobalt oxide; isotope-labeled oxygen; reaction mechanism; catalyst pretreatment; deactivation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
22
Recensione:
Indirizzi per estratti:
Indirizzo: Jansson, J Chalmers Univ Technol, Competence Ctr Catalysis, Dept Chem React Engn, S-41296 Gothenburg, Sweden Chalmers Univ Technol Gothenburg Sweden S-41296 nburg, Sweden
Citazione:
J. Jansson, "Low-temperature CO oxidation over Co3O4/Al2O3", J CATALYSIS, 194(1), 2000, pp. 55-60

Abstract

The oxidation of CO over Co3O4/gamma-Al2O3 at room temperature (21 degreesC) has been studied in a continuous-flow reactor system with oxidising andreducing pretreatment, at varying stoichiometric ratios, and by using isotope-labeled O-18(2), The fresh catalyst was characterised by temperature-programmed reduction and temperature-programmed oxidation. CO deactivates theoxidised catalyst but the rate of deactivation can be suppressed by havinga high O-2/CO ratio. The isotope study showed that the oxygen participating in the oxidation of CO comes from oxygen bound to the cobalt oxide surface. Finally, a mechanism for the CO oxidation over Co3O4/gamma-Al2O3 is proposed. (C) 2000 Academic Press.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 12/07/20 alle ore 06:29:50