Catalyst for the oxidation of NO, the oxidation of a hydrocarbon, the oxidation of NH3 and the selective catalytic reduction of NOx

US11691125B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Robert Dorner · Hannover, DE
• Ansgar Wille · Hannover, DE
• Kevin BEARD · Hannover, DE

Key dates

• Filing date: Apr 30, 2019
• Grant date: Jul 4, 2023
• Expiry date: Apr 30, 2039

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02C20/10
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The present invention relates to a catalyst for the oxidation of NO, for the oxidation of ammonia, for the oxidation of HC and for the selective catalytic reduction of NOx, comprising a flow through substrate comprising an inlet end, an outlet end, a substrate axial length extending from the inlet end to the outlet end and a plurality of passages defined by internal walls of the flow through substrate extending therethrough; a first coating comprising one or more of a vanadium oxide and a zeolitic material comprising one or more of copper and iron; a second coating comprising a first platinum group metal component supported on a non-zeolitic first oxidic material and further comprising one or more of a vanadium oxide and a zeolitic material comprising one or more of copper and iron; optionally a third coating comprising a second platinum group metal component supported on a second oxidic material; wherein the third coating is disposed on the surface of the internal walls and under the second coating over z % of the axial length of the substrate from the outlet end to the inlet end, with z being in the range of from 0 to 100; wherein the second coating extends over y % of the axial …