公开(公告)号：US20240392715A1

公开(公告)日：2024-11-28

申请号：US18694217

申请日：2022-09-26

Applicant: BASF CORPORATION

Inventor： Liang CHEN ,  Jiadi ZHANG ,  Renjie QIU ,  Yuchao ZHANG ,  Yufen HAO ,  Wenming SHI

IPC: F01N3/28 ,  B01D53/94 ,  B01J23/22 ,  B01J23/42 ,  B01J29/76 ,  B01J35/00 ,  B01J35/57 ,  B01J37/02 ,  B01J37/04 ,  B01J37/08 ,  F01N3/10 ,  F01N3/20

Abstract: A catalyst system for purifying an exhaust gas, comprising one or more antimony-containing regions comprising an antimony-containing catalyst, particularly antimony-containing SCR catalyst, and one or more antimony-trapping regions comprising a molecular sieve which is optionally metal-promoted, wherein at least one of the antimony-trapping regions is located downstream of the one or more antimony-containing regions in a flow direction of the exhaust gas, and also a method for treatment of an exhaust gas containing nitrogen oxides.

公开(公告)号：US20230347288A1

公开(公告)日：2023-11-02

申请号：US17997831

申请日：2021-04-26

Applicant: BASF CORPORATION

Inventor： Yuchao ZHANG ,  Renjie QIU ,  Jia Di ZHANG

IPC: B01D53/94 ,  B01J23/22 ,  B01J21/08 ,  B01J35/00 ,  B01J35/04 ,  B01J37/04 ,  B01J37/02 ,  B01J37/00 ,  F01N3/20 ,  F01N3/28 ,  F01N3/035 ,  F01N3/10

CPC classification number: B01D53/9418 ,  B01J23/22 ,  B01J21/08 ,  B01J35/0066 ,  B01J35/04 ,  B01J37/04 ,  B01J37/0236 ,  B01J37/0221 ,  B01J37/0228 ,  B01J37/024 ,  B01J37/0009 ,  F01N3/2066 ,  F01N3/2825 ,  F01N3/035 ,  F01N3/106 ,  B01D2257/404 ,  B01D2255/20723 ,  B01D2255/2098 ,  B01D2251/2062 ,  B01D2258/01 ,  F01N2370/04 ,  F01N2610/02

Abstract: The present invention relates to a selective catalytic reduction (SCR) catalyst comprising a support, vanadium and antimony, a catalytic article comprising the SCR catalyst, and an exhaust treatment system for an internal combustion engine comprising the SCR catalyst. In one embodiment, the invention provides an SCR catalyst for reduction of 5 nitrogen oxides, comprising: a support, and an active material on the support; wherein the support, calculated as its oxide, is present in the SCR catalyst in an amount of 40 to 99% by weight, relative to the total weight of the SCR catalyst; the active material comprises vanadium and antimony; the vanadium, calculated as V2O5, is present in the SCR catalyst in an amount of 1 to 15% by weight, relative to the total weight of the SCR catalyst; the 10 antimony, calculated as Sb2O3, is present in the SCR catalyst in an amount of 0.5 to 20% by weight, relative to the total weight of the SCR catalyst; wherein the SCR catalyst, after hydrothermally aged at 550° C. for 100 hours with 10% water, has a 200-300° C. denitrification efficiency of at least 60%, with 60,000h−1 space velocity and an ammonia to NOx molar ratio of 1:11