公开(公告)号：US20230081351A1

公开(公告)日：2023-03-16

申请号：US18055708

申请日：2022-11-15

申请人： BASF Corporation

发明人： Ivor BULL ,  Wen-Mei XUE ,  Patrick BURK ,  R. Samuel BOORSE ,  William M. JAGLOWSKI ,  Gerald Stephen KOERMER ,  Ahmad MOINI ,  Joseph A. PATCHETT ,  Joseph C. DETTLING ,  Matthew Tyler CAUDLE

IPC分类号： B01J29/72 ,  B01J29/068 ,  B01D53/56 ,  B01D53/94 ,  B01J23/42 ,  B01J23/89 ,  B01J29/072 ,  B01J29/76 ,  B01J35/00 ,  B01J35/04 ,  B01J37/02 ,  B01J29/74 ,  B01D53/86 ,  B01J29/06 ,  B01J29/80 ,  C01B39/46

摘要： Zeolite catalysts and systems and methods for preparing and using zeolite catalysts having the CHA crystal structure are disclosed. The catalysts can be used to remove nitrogen oxides from a gaseous medium across a broad temperature range and exhibit hydrothermal stable at high reaction temperatures. The zeolite catalysts include a zeolite carrier having a silica to alumina ratio from about 15:1 to about 256:1 and a copper to alumina ratio from about 0.25:1 to about 1:1.

公开(公告)号：US20200290022A1

公开(公告)日：2020-09-17

申请号：US16652875

申请日：2018-10-02

申请人： BASF Corporation

发明人： Xiaolai ZHENG ,  Patrick BURK

IPC分类号： B01J23/83 ,  B01J23/20 ,  B01J23/30 ,  B01J23/34 ,  B01J23/44 ,  B01J23/46 ,  B01J35/04 ,  B01J35/00 ,  F01N3/28 ,  F01N3/10 ,  F01N3/20

摘要： The present disclosure provides SCR catalyst compositions, catalyst articles, and catalyst systems, as well as methods of reducing the amount of NOx present in an engine exhaust gas, particularly exhaust from a gasoline engine. The catalyst compositions particularly can comprise a doped ceria substrate, particularly a ceria support doped with at least a niobia component, and optionally further doped with a further material, particularly a base metal oxide (BMO).