公开(公告)号：US12115520B2

公开(公告)日：2024-10-15

申请号：US17936090

申请日：2022-09-28

申请人： Jonhson Matthey (Shanghai) Chemicals Limited

发明人： Dongsheng Qiao ,  Jingwen Wang ,  Xiang Zheng

IPC分类号： B01J21/04 ,  B01D53/86 ,  B01J21/06 ,  B01J23/10 ,  B01J23/89 ,  B01J35/00 ,  F01N3/10

CPC分类号： B01J23/8926 ,  B01D53/86 ,  B01J21/04 ,  B01J21/066 ,  B01J23/10 ,  B01J23/8906 ,  B01J35/19 ,  F01N3/101 ,  F01N3/106 ,  B01D2255/1021 ,  B01D2255/20738 ,  B01D2255/20761

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 zeolite; and a second catalytic region beginning at the inlet end, wherein the second catalytic region comprises a second platinum group metal (PGM) component, a second oxygen storage capacity (OSC) material, and a second inorganic oxide; wherein the second PGM component is selected from the group consisting of palladium, platinum, rhodium or a combination thereof.