Palladium—rhodium single-layer catalyst

US9156023B2 · kind B2 · utility

Assignee

• UMICORE AG & CO. KG · DE

Inventors

• Raoul Klingmann · Alzenau, DE
• Martin Roesch · Rodgau, DE
• Dieter Linder · Hanau, DE
• Joerg-Michael Richter · Scheinfeld, DE

Key dates

• Filing date: Feb 23, 2008
• Grant date: Oct 13, 2015
• Expiry date: Aug 7, 2031

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/12
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A one-layer three-way catalyst is described for the cleaning of the exhaust gases of internal combustion engines with outstanding activity and thermal stability. The catalyst comprises an active aluminum oxide, a first cerium/zirconium mixed oxide and a second cerium/zirconium mixed oxide. The first cerium/zirconium mixed oxide has a higher zirconium oxide content than the second mixed oxide. The first cerium/zirconium mixed oxide is catalytically activated with rhodium and the second cerium/zirconium mixed oxide with palladium.