公开(公告)号：US11614013B2

公开(公告)日：2023-03-28

申请号：US17249097

申请日：2021-02-19

申请人： JOHNSON MATTHEY PUBLIC LIMITED COMPANY ,  JOHNSON MATTHEY (SHANGHAI) CHEMICALS LIMITED

发明人： Hai-Ying Chen ,  Hongyu Ji ,  Dongsheng Qiao ,  Eric Tyo ,  Takashi Yamada ,  Xiang Zheng

IPC分类号： B01J23/42 ,  B01J23/44 ,  B01J23/46 ,  B01J35/10 ,  F01N3/10

摘要： A three-way catalyst article, and its use in an exhaust system for internal combustion engines, is disclosed. The catalyst article for treating exhaust gas comprising: a substrate comprising an inlet end and an outlet end with an axial length L; a first catalytic region comprising a first platinum group metal (PGM) component and a first oxygen storage capacity (OSC) material, wherein the first OSC material has a fresh specific surface area (SSA) of at least 10 m2/g; and wherein the first OSC material has an SSA difference of no more than 30 m2/g between the fresh first OSC material and the aged first OSC material.

公开(公告)号：US11364485B2

公开(公告)日：2022-06-21

申请号：US17301737

申请日：2021-04-13

申请人： JOHNSON MATTHEY (SHANGHAI) CHEMICALS LIMITED

发明人： Dongsheng Qiao ,  Jingwen Wang ,  Xiang Zheng

IPC分类号： B01J23/10 ,  B01J23/44 ,  B01J23/46 ,  B01J35/00 ,  B01J37/03 ,  B01J37/08 ,  B01D53/94 ,  F01N3/10 ,  F01N3/28 ,  F02B43/10

摘要： A three-way catalyst article, and its use in an exhaust system for compressed natural gas engines, is disclosed. The catalyst article for treating exhaust gas from compressed natural gas (CNG) engine comprising: a substrate comprising an inlet end, an outlet end with an axial length L; a first catalytic region beginning at the outlet end and extending for less than the axial length L, wherein the first catalytic region comprises a first PGM component; and a second catalytic region beginning at the inlet end, wherein the second catalytic region comprises a second PGM component; wherein the first PGM component comprises palladium, platinum, or a combination thereof; and wherein the second PGM component comprises rhodium.