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Titolo:
Periodic control for improved low-temperature catalytic activity
Autore:
Carlsson, PA; Thormahlen, P; Skoglundh, M; Persson, H; Fridell, E; Jobson, E; Andersson, B;
Indirizzi:
Chalmers Univ Technol, Competence Ctr Catalysis, SE-41296 Gothenburg, Sweden Chalmers Univ Technol Gothenburg Sweden SE-41296 1296 Gothenburg, Sweden Chalmers Univ Technol, Dept Chem React Engn, SE-41296 Gothenburg, Sweden Chalmers Univ Technol Gothenburg Sweden SE-41296 1296 Gothenburg, Sweden Chalmers Univ Technol, Dept Appl Phys, SE-41296 Gothenburg, Sweden Chalmers Univ Technol Gothenburg Sweden SE-41296 1296 Gothenburg, Sweden Chalmers Univ Technol, Dept Appl Surface Chem, SE-41296 Gothenburg, SwedenChalmers Univ Technol Gothenburg Sweden SE-41296 1296 Gothenburg, Sweden Volvo Technol Dev, SE-40508 Gothenburg, Sweden Volvo Technol Dev Gothenburg Sweden SE-40508 SE-40508 Gothenburg, Sweden
Titolo Testata:
TOPICS IN CATALYSIS
fascicolo: 1-4, volume: 16, anno: 2001,
pagine: 343 - 347
SICI:
1022-5528(2001)16:1-4<343:PCFILC>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Soggetto:
CO OXIDATION; COBALT OXIDE; PLATINUM; CERIA; CAR;
Keywords:
platinum; carbon monoxide; catalytic oxidation; low temperature activity; self-poisoning; cold start emissions; periodic pulsing; transient changes;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
14
Recensione:
Indirizzi per estratti:
Indirizzo: Carlsson, PA Chalmers Univ Technol, Competence Ctr Catalysis, SE-41296 Gothenburg, Sweden Chalmers Univ Technol Gothenburg Sweden SE-41296 rg, Sweden
Citazione:
P.A. Carlsson et al., "Periodic control for improved low-temperature catalytic activity", TOP CATAL, 16(1-4), 2001, pp. 343-347

Abstract

The influence of transient changes in the gas composition on the low-temperature activity of a commercial three-way catalyst and a Pt/Al2O3 model catalyst has been studied. By introducing well-controlled periodic O-2 pulses to simple gas mixtures of CO or C3H6 (in N-2), a substantial improvement ofthe low temperature oxidation activity was observed for both catalysts. The reason for low activity at low temperatures is normally attributed to self-poisoning by CO or hydrocarbons. The improved catalytic performance observed here is suggested to origin from the transients causing a surface reactant composition that is favourable for the reaction rate.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 14/07/20 alle ore 06:51:32