Monometallic rhodium-containing four-way conversion catalysts for gasoline engine emissions treatment systems

US11185819B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Janosch Cravillon · Hannover, DE
• Stephan Siemund · Pattensen, DE
• Attilio Siani · Shanghai, CN
• Thomas Schmitz · Wesseling, DE
• Markus Kinne · Hannover, DE

Key dates

• Filing date: Jul 25, 2017
• Grant date: Nov 30, 2021
• Expiry date: Jul 25, 2037

Classification

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

Abstract

Catalyzed particulate filters comprise three-way conversion (TWC) catalytic material, which comprises rhodium as the only platinum group metal, that permeates walls of a particulate filter. Such catalyzed particulate filters may be located downstream of close-coupled three-way conversion (TWC) composites in an emission treatment system downstream of a gasoline direct injection engine for treatment of an exhaust stream comprising hydrocarbons, carbon monoxide, nitrogen oxides, and particulates.