公开(公告)号：US20240167410A1

公开(公告)日：2024-05-23

申请号：US18549242

申请日：2022-03-09

Applicant: BASF Corporation

Inventor： Jiadi Zhang ,  Yijiang Wu ,  Liang Chen ,  Shuxin Lv ,  Yu Zhang ,  Edgar Viktor Huennekes ,  Kevin Beard ,  Joseph A Patchett ,  Jan Martin Becker ,  Martin Kalwei

IPC: F01N3/28 ,  B01D53/94 ,  B01J23/22 ,  B01J29/76 ,  B01J35/00 ,  B01J35/57 ,  B01J35/61 ,  B01J37/02 ,  B01J37/08 ,  F01N3/035 ,  F01N3/10 ,  F01N3/20

CPC classification number: F01N3/2803 ,  B01D53/9418 ,  B01D53/9472 ,  B01J23/22 ,  B01J29/7615 ,  B01J35/19 ,  B01J35/57 ,  B01J35/617 ,  B01J37/0228 ,  B01J37/0236 ,  B01J37/08 ,  F01N3/035 ,  F01N3/101 ,  F01N3/106 ,  F01N3/2066 ,  B01D2255/20723 ,  B01D2255/20738 ,  B01D2255/20761 ,  B01D2255/502 ,  B01D2255/707 ,  B01D2255/9035 ,  B01D2255/9155 ,  B01D2255/9207 ,  B01D2257/404 ,  B01D2258/012 ,  F01N2370/04

Abstract: The present invention relates to a catalytic article for purifying an exhaust gas containing nitrogen oxides, which comprises a first region containing a vanadium-based SCR catalyst, a second region containing a metal-promoted molecular sieve catalyst, and a third region containing a vanadium-based SCR catalyst, wherein at least part of the second region is located downstream of at least part of the first region and upstream of at least part of the third region in the exhaust gas flow direction, provided that no part of the second region is located upstream of the first region or downstream of the third region. The present invention also relates to a method and a system for treatment of an exhaust gas containing nitrogen oxides by selective catalytic reduction using the catalytic article.