	US 11,865,517 B2
	Catalyst for reducing ammonia emissions
Michael Seyler, Mainaschaff (DE); and Massimo Colombo, Frankfurt am Main (DE)
Assigned to UMICORE AG & CO. KG, Hanau-Wolfgang (DE)
Filed by UMICORE AG & CO. KG, Hanau-Wolfgang (DE)
Filed on Aug. 16, 2021, as Appl. No. 17/402,918.
Claims priority of application No. 20191556 (EP), filed on Aug. 18, 2020.
Prior Publication US 2022/0055019 A1, Feb. 24, 2022
Int. Cl. B01J 23/42 (2006.01); B01J 21/04 (2006.01); B01J 21/06 (2006.01); B01J 29/72 (2006.01); B01J 35/02 (2006.01); B01J 37/02 (2006.01); B01J 35/00 (2006.01)

CPC B01J 23/42 (2013.01) [B01J 21/04 (2013.01); B01J 21/063 (2013.01); B01J 29/723 (2013.01); B01J 35/023 (2013.01); B01J 37/0215 (2013.01)]

22 Claims

1. A catalyst comprising

a carrier substrate of length L extending between an end X and an end Y,

coating A arranged as a first layer on the carrier and containing platinum on a metal oxide α and a metal oxide β that does not carry a noble metal, and

coating B applied as a second layer to coating A and containing a Cu-exchanged molecular sieve and no noble metal,

wherein a total washcoat quantity of coating A is 40 g/l to 75 g/l based on coated catalyst volume.