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.

公开(公告)号：US11266977B2

公开(公告)日：2022-03-08

申请号：US16973325

申请日：2019-07-30

Applicant: BASF Corporation

Inventor： Edgar Viktor Huennekes ,  Joseph A Patchett ,  Petra Cordes ,  Kevin David Beard ,  Jan Martin Becker

IPC: F01N3/20 ,  F01N3/28 ,  B01J21/06 ,  B01J23/22 ,  B01J23/847 ,  B01J35/04 ,  B01J35/10 ,  B01J37/02 ,  B01J37/04

Abstract: The present invention relates to a selective catalytic reduction catalyst for the treatment of an exhaust gas of a diesel engine comprising (i) 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; (II) a coating disposed on the surface of the internal walls of the substrate, where-in the surface defines the interface between the passages and the internal walls, wherein the coating comprises a vanadium oxide supported on an oxidic material comprising titania, and further comprises a mixed oxide of vanadium and one or more of iron, erbium, bismuth, cerium, europium, gadolinium, holmium, lanthanum, lutetium, neodymium, praseodymium, promethium, samarium, scandium, terbium, thulium, ytterbium, yttrium, molybdenum, tungsten, manganese, cobalt, nickel, copper, aluminum and antimony.