公开(公告)号：US12012885B2

公开(公告)日：2024-06-18

申请号：US17257953

申请日：2019-07-24

Applicant: BASF Corporation

Inventor： Edgar Viktor Huennekes ,  Kevin David Beard ,  Petra Cordes ,  Ruediger Wolff ,  Jan Martin Becker

IPC: F01N3/20 ,  B01J21/06 ,  B01J23/22 ,  B01J37/02

CPC classification number: F01N3/2066 ,  B01J21/063 ,  B01J23/22 ,  B01J37/0244 ,  B01J37/0246 ,  F01N2510/068

Abstract: An SCR catalyst for treating diesel exhaust gas has: a flow-through substrate with 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 disposed on the internal wall surface of the substrate, the surface defining the interface between the internal walls and passages, the first coating extending over 40 to 100% of the substrate axial length, the first coating having an 8-membered ring pore zeolitic material with copper and/or iron; a second coating extending over 20 to 100% of the substrate axial length, the second coating having a first oxidic material with titania, wherein at least 75 wt. % of the second coating is titania, calculated as TiO2, and 0 to 0.01 wt. % of the second coating is vanadium oxides, calculated as V2O5.