Catalytically active particle filter with a high degree of filtration efficiency

US11566548B2 · kind B2 · utility

Assignee

• UMICORE AG & CO. KG · DE

Inventors

• Martin Foerster · Büdingen, DE
• Juergen Koch · Schifferstadt, DE
• Manuel Gensch · Aschaffenburg, DE
• Naina Deibel · Pfungstadt, DE
• Antje Oltersdorf · Glückstadt, DE
• Jan Schoenhaber · Darmstadt, DE

Key dates

• Filing date: Nov 7, 2019
• Grant date: Jan 31, 2023
• Expiry date: Nov 7, 2039

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F01N2510/0682
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The invention relates to a wall-flow filter as a particle filter with catalytically active coatings in the channels which are closed in a gas-tight manner at the opposing closed ends of the channels A at the first end, wherein the inlet region of the filter is additionally supplied with a dry powder-gas aerosol which contains metal compounds with a high melting point (such as the metal oxides Al2O3, SiO2, FeO2, TiO2, ZnO2, etc. for example) and which is to simultaneously improve the catalytic activity and the degree of filtration efficiency with respect to the exhaust gas back-pressure.