| Issue |
J. Chim. Phys.
Volume 96, Number 3, March 1999
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|
|---|---|---|
| Page(s) | 437 - 442 | |
| DOI | https://doi.org/10.1051/jcp:1999150 | |
Durability of Three-Way Platinum and Rhodium Catalysts in Oxidizing, Reducing and Cycled Environments
Departamento de Ingeniería Química, Facultad de Ciencias, Universidad del País Vasco, Euskal Herriko Unibertsitatea, P.0. Box 644, 48080 Bilbao, Spain
The three-way catalytic behaviour (CO, HC and NOx conversions and light-off temperatures) of MN/CeO2/Al2O3 (MN: Pt, Rh, Pt-Rh) catalysts, fresh and aged under severe oxidizing, reducing and cycled environments, has been analyzed. The bimetallic Pt-Rh catalyst resulted the most active among those tested.
Résumé
Le comportement catalytique (conversions de CO, HC et NOx et temperature d'ignition) de catalyseurs trois-voies MN/CeO2/Al2O3 (MN : Pt, Rh, Pt-Rh) frais et vieillis sous sévère conditions en environnement oxydant, réducteur et cyclique, a été analysé. Les résultats obtenus indiquent que parmi les catalyseurs étudiés, le bi- metallique Pt-Rh est le plus actif.
Key words: TWC, three-way catalyst, thermal aging, light-off temperature
© EDP Sciences, 1999