Catalyzed soot filter for use in passive selective catalytic reduction

US10215073B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Alfred Punke · Walle, DE
• Gerd Grubert · Hannover, DE
• Marcus Hilgendorff · Hannover, DE
• Torsten Neubauer · Langenhagen, DE
• Matthew Tyler Caudle · Hillsborough Township, US
• Yuejin Li · Edison, US

Key dates

• Filing date: May 18, 2016
• Grant date: Feb 26, 2019
• Expiry date: May 18, 2036

Classification

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

Abstract

The present invention relates to catalyzed soot filter comprising a porous wall flow substrate, a catalyst for selective catalytic reduction (SCR), a palladium component, and a platinum component, the wall flow substrate comprising an inlet end, an outlet end, a substrate axial length extending between the inlet end and the outlet end, and a plurality of channels defined by internal walls of the wall flow substrate, wherein the plurality of channels comprise inlet channels having an open inlet end and a closed outlet end, and outlet channels having a closed inlet end and an open outlet end, and the SCR catalyst is provided on the entire surface of the inlet channel walls and on at least a portion of the surface of the pores within the channel walls underneath the surface of the channel walls coated with the SCR catalyst.