公开(公告)号：US20220362754A1

公开(公告)日：2022-11-17

申请号：US17662377

申请日：2022-05-06

Applicant: Johnson Matthey Public Limited Company

Inventor： Daniel AVIS ,  Alexander Nicholas Michael GREEN ,  Matthew Eben HARRIS ,  Carmelo IACONO ,  Caitlin JENKINS ,  Alanna MURPHY

IPC: B01J29/78 ,  F01N3/28 ,  B01D53/94

Abstract: A catalytic composition for treating a NOx-containing exhaust gas, wherein the composition comprises a copper-substituted zeolite comprising: i) Ce in a total amount of about 0.1 to about 200 g/ft3; and ii) Mn in a total amount of about 0.1 to about 200 g/ft3.

公开(公告)号：US20230347326A1

公开(公告)日：2023-11-02

申请号：US18301310

申请日：2023-04-17

Applicant: JOHNSON MATTHEY PUBLIC LIMITED COMPANY

Inventor： Daniel AVIS ,  Rafal BARAN ,  Gavin BROWN ,  Alexander GREEN ,  Neil GREENHAM ,  Matthew HARRIS ,  Oliver HEMMING ,  Carmelo IACONO ,  Caitlin JENKINS ,  Alanna MURPHY ,  Paul PHILLIPS

IPC: B01J29/76 ,  B01J23/72 ,  B01J35/00 ,  F01N3/20 ,  F01N3/28 ,  B01D53/94

CPC classification number: B01J29/7615 ,  B01J23/72 ,  B01J35/0006 ,  F01N3/208 ,  F01N3/2828 ,  B01D53/9418 ,  B01D53/9495 ,  B01D53/9472 ,  F01N2610/02 ,  F01N2370/04 ,  F01N2610/1453 ,  B01D2251/2062 ,  B01D2255/20738 ,  B01D2255/502 ,  B01D2255/20761 ,  B01D2255/9032

Abstract: A method of treating exhaust gas from a lean burn internal combustion engine is disclosed. The method comprises: introducing ammonia or an ammonia precursor into the exhaust gas upstream of an Fe-SCR catalyst, the Fe-SCR catalyst comprising iron and a zeolite; and contacting the exhaust gas with the Fe-SCR catalyst; wherein the amount of ammonia or ammonia precursor introduced into the exhaust gas upstream of the Fe-SCR catalyst is controlled to provide an ammonia-to-NOx molar ratio (ANR) in the exhaust gas contacting the Fe-SCR catalyst of from greater than 2 to 6.