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公开(公告)号：US12203403B2
公开(公告)日：2025-01-21
申请号：US15552305
申请日：2016-03-18
Applicant: BASF CORPORATION
Inventor： Weiyong Tang , Sanath V. Kumar , Kevin A. Hallstrom , David M. Youngren , Kenneth E. Voss
Abstract: Provided are catalyst articles, methods and systems for treating lean burn engine exhaust. Catalyst articles include selective catalytic reduction catalyst on a particulate filter. The SCR catalyst on the particulate filter provides limited NOx conversion so that unconverted NO2 is available to facilitate passive oxidation of soot trapped on the particulate filter by reaction with NO2. Systems and methods utilize such catalytic articles, and further include, e.g., a downstream selective catalytic reduction catalyst on a flow through substrate.
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公开(公告)号：US20140301923A1
公开(公告)日：2014-10-09
申请号：US14208817
申请日：2014-03-13
Applicant: BASF Corporation
Inventor： Weiyong Tang , Jaya L. Mohanan
CPC classification number: B01D53/9431 , B01D53/9404 , B01D53/9418 , B01D2255/2047 , B01D2255/2065 , B01D2255/20707 , B01D2255/20715 , B01D2255/20723 , B01D2255/20738 , B01D2255/20761 , B01D2255/20776 , B01D2255/2092 , B01D2255/40 , B01D2255/50 , B01D2255/9022 , B01D2255/9032 , B01D2255/911 , B01J21/04 , B01J21/063 , B01J21/066 , B01J23/02 , B01J23/10 , B01J23/22 , B01J23/30 , B01J23/72 , B01J23/745 , B01J29/061 , B01J29/072 , B01J29/7015 , B01J29/72 , B01J29/763 , B01J35/0006 , B01J37/0036 , B01J37/0244 , F01N3/10 , F01N3/2066 , F01N2510/0682 , F01N2510/0684 , F01N2570/18 , Y02C20/10 , Y02T10/24 , Y10S502/52712 , Y10S502/52713
Abstract: Described are SCR catalyst systems comprising a first SCR catalyst composition and a second SCR catalyst composition arranged in the system, the first SCR catalyst composition promoting higher N2 formation and lower N2O formation than the second SCR catalyst composition, and the second SCR catalyst composition having a different composition than the first SCR catalyst composition, the second SCR catalyst composition promoting lower N2 formation and higher N2O formation than the first SCR catalyst composition. The SCR catalyst systems are useful in methods and systems to catalyze the reduction of nitrogen oxides in the presence of a reductant.
Abstract translation: 描述了包括第一SCR催化剂组合物和布置在该体系中的第二SCR催化剂组合物的SCR催化剂体系，所述第一SCR催化剂组合物促进比第二SCR催化剂组合物更高的N 2形成和较低的N 2 O生成，并且所述第二SCR催化剂组合物具有 与第一SCR催化剂组合物不同的组成，第二SCR催化剂组合物促进比第一SCR催化剂组合物更低的N 2形成和更高的N 2 O形成。 SCR催化剂体系可用于在还原剂存在下催化还原氮氧化物的方法和系统。
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公开(公告)号：US20140271422A1
公开(公告)日：2014-09-18
申请号：US14208904
申请日：2014-03-13
Applicant: BASF Corporation
Inventor： Weiyong Tang
Abstract: Described are SCR catalyst systems comprising a first SCR catalyst composition and a second SCR catalyst composition arranged in the system, the first SCR catalyst composition promoting higher N2 formation and lower N2O formation than the second SCR catalyst composition, and the second SCR catalyst composition having a different composition than the first SCR catalyst composition, the second SCR catalyst composition promoting lower N2 formation and higher N2O formation than the first SCR catalyst composition. The SCR catalyst systems are useful in methods and systems to catalyze the reduction of nitrogen oxides in the presence of a reductant.
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公开(公告)号：US11872542B2
公开(公告)日：2024-01-16
申请号：US17626135
申请日：2020-07-09
Applicant: BASF CORPORATION
Inventor： Weiyong Tang , Sandip D. Shah , Andreas R. Munding , Fabien A. Rioult , Ramesh Murlidhar Kakwani
CPC classification number: B01J23/44 , B01J21/04 , B01J23/42 , F01N3/2066 , F01N2570/10 , F01N2570/12 , F01N2570/14
Abstract: A catalyst article is provided including a substrate including a plurality of passageways, and further including a first and a second oxidation region including a first and a second subset of said plurality of passageways. A first catalyst composition is coating at least a portion of each passageway of the first oxidation region and positioned as a sole PGM-containing catalyst layer, or a zoned portion thereof, or as a top PGM-containing catalyst layer, or a zoned portion thereof, in the first oxidation region. A second catalyst composition is coating at least a portion of each passageway of the second oxidation region and positioned as a sole PGM-containing catalyst layer, or a zoned portion thereof, or as a top PGM-containing catalyst layer, or a zoned portion thereof, in the second oxidation region. The Pt:Pd weight ratio is greater in the first catalyst composition than in the second catalyst composition.
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公开(公告)号：US10512901B2
公开(公告)日：2019-12-24
申请号：US14208904
申请日：2014-03-13
Applicant: BASF Corporation
Inventor： Weiyong Tang
IPC: B01J29/06 , B01J29/072 , F01N3/20 , B01J23/22 , B01J23/30 , B01D63/06 , B01D69/12 , B01D69/14 , B01D71/02 , B01D53/94 , B01J37/02 , B01J35/00 , B01J23/02 , B01J23/10 , B01J23/72 , B01J23/745 , B01J29/72 , B01J29/85 , B01J21/04 , B01J21/06 , B01J29/70 , B01J29/76 , B01J37/00 , B01J29/50
Abstract: Described are SCR catalyst systems comprising a first SCR catalyst composition and a second SCR catalyst composition arranged in the system, the first SCR catalyst composition promoting higher N2 formation and lower N2O formation than the second SCR catalyst composition, and the second SCR catalyst composition having a different composition than the first SCR catalyst composition, the second SCR catalyst composition promoting lower N2 formation and higher N2O formation than the first SCR catalyst composition. The SCR catalyst systems are useful in methods and systems to catalyze the reduction of nitrogen oxides in the presence of a reductant.
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Patent Agency Ranking
公开(公告)号：US09017626B2
公开(公告)日：2015-04-28
申请号：US14208817
申请日：2014-03-13
Applicant: BASF Corporation
Inventor： Weiyong Tang , Jaya L. Mohanan
IPC: B01D53/94 , F01N3/10 , F01N3/24 , B01J21/06 , B01J23/22 , B01J23/30 , B01J23/00 , B01J23/745 , B01J29/06 , B01J29/072 , B01J29/70 , B01J29/76 , F01N3/20
CPC classification number: B01D53/9431 , B01D53/9404 , B01D53/9418 , B01D2255/2047 , B01D2255/2065 , B01D2255/20707 , B01D2255/20715 , B01D2255/20723 , B01D2255/20738 , B01D2255/20761 , B01D2255/20776 , B01D2255/2092 , B01D2255/40 , B01D2255/50 , B01D2255/9022 , B01D2255/9032 , B01D2255/911 , B01J21/04 , B01J21/063 , B01J21/066 , B01J23/02 , B01J23/10 , B01J23/22 , B01J23/30 , B01J23/72 , B01J23/745 , B01J29/061 , B01J29/072 , B01J29/7015 , B01J29/72 , B01J29/763 , B01J35/0006 , B01J37/0036 , B01J37/0244 , F01N3/10 , F01N3/2066 , F01N2510/0682 , F01N2510/0684 , F01N2570/18 , Y02C20/10 , Y02T10/24 , Y10S502/52712 , Y10S502/52713
Abstract: Described are SCR catalyst systems comprising a first SCR catalyst composition and a second SCR catalyst composition arranged in the system, the first SCR catalyst composition promoting higher N2 formation and lower N2O formation than the second SCR catalyst composition, and the second SCR catalyst composition having a different composition than the first SCR catalyst composition, the second SCR catalyst composition promoting lower N2 formation and higher N2O formation than the first SCR catalyst composition. The SCR catalyst systems are useful in methods and systems to catalyze the reduction of nitrogen oxides in the presence of a reductant.
Abstract translation: 描述了包括第一SCR催化剂组合物和布置在该体系中的第二SCR催化剂组合物的SCR催化剂体系，所述第一SCR催化剂组合物促进比第二SCR催化剂组合物更高的N 2形成和较低的N 2 O生成，并且所述第二SCR催化剂组合物具有 与第一SCR催化剂组合物不同的组成，第二SCR催化剂组合物促进比第一SCR催化剂组合物更低的N 2形成和更高的N 2 O形成。 SCR催化剂体系可用于在还原剂存在下催化还原氮氧化物的方法和系统。
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公开(公告)号：US11305260B2
公开(公告)日：2022-04-19
申请号：US16975611
申请日：2019-02-22
Applicant: BASF Corporation
Inventor： Yun Fei Qi , Jun Cong Jiang , Shau Lin Chen , Weiyong Tang , Yu Lin Qiu , Liang Fang Lv , Yan Zhu Lei
IPC: B01D53/94 , B01J23/46 , B01J35/04 , B01J35/10 , B01J37/02 , F01N3/10 , F01N3/22 , F01N3/28 , B01J37/08 , F01N3/022
Abstract: A catalyst for gasoline engine exhaust gas after-treatment, comprising Pt and optionally at least one other platinum group metal on a hydrothermal stable support material which is coated onto a gasoline particulate filter. The catalyst oxidizes particulate matter trapped in the gasoline particulate filter under low temperature and abates NOx, CO and HC. Also a process for preparing the catalyst is disclosed, and a method for after-treatment of gasoline engine exhaust gas using the catalyst is disclosed.
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公开(公告)号：US20190083967A1
公开(公告)日：2019-03-21
申请号：US16142451
申请日：2018-09-26
Applicant: BASF Corporation
Inventor： Xiaofan Yang , Weiyong Tang , Ze Zhang
Abstract: The present invention provides methods for low temperature desulfating sulfur-poisoned SCR catalysts, and emission control systems adapted to apply such desulfating methods, in order to regenerate catalytic NOx conversion activity. The methods are adapted for treating an SCR catalyst to desorb sulfur from the surface of the SCR catalyst and increase NOx conversion activity of the SCR catalyst, the treating step including treating the SCR catalyst with a gaseous stream comprising a reductant for a first treatment time period and at a first treatment temperature, wherein the first treatment temperature is about 350° C. or less, followed by a second treatment time period and a second treatment temperature higher than the first treatment temperature, wherein the molar ratio of reductant to NOx during the treating step is about 1.05:1 or higher.
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公开(公告)号：US20180045097A1
公开(公告)日：2018-02-15
申请号：US15552305
申请日：2016-03-18
Applicant: BASF CORPORATION
Inventor： Weiyong Tang , Sanath V. Kumar , Kevin A. Hallstrom , David M. Youngren , Kenneth E. Voss
CPC classification number: F01N3/208 , B01D53/9418 , B01D53/944 , B01D53/9477 , B01D2255/50 , B01D2255/9155 , B01D2257/404 , B01D2258/012 , B01J29/072 , B01J29/76 , B01J29/763 , B01J35/0006 , B01J35/04 , B01J37/0246 , B01J2229/18 , F01N3/035 , F01N2570/14 , F01N2610/02 , Y02A50/2325 , Y02A50/2345 , Y02T10/24
Abstract: Provided are catalyst articles, methods and systems for treating lean burn engine exhaust. Catalyst articles include selective catalytic reduction catalyst on a particulate filter. The SCR catalyst on the particulate filter provides limited NOx conversion so that unconverted NO2 is available to facilitate passive oxidation of soot trapped on the particulate filter by reaction with NO2. Systems and methods utilize such catalytic articles, and further include, e.g., a downstream selective catalytic reduction catalyst on a flow through substrate.
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公开(公告)号：US20240226862A9
公开(公告)日：2024-07-11
申请号：US18277908
申请日：2022-02-18
Applicant: BASF CORPORATION
Inventor： Jia Di Zhang , Wen-Mei Xue , Xiaofan Yang , Weiyong Tang , Burcu Bayram , Yu Fen Hao
IPC: B01J29/76 , B01D53/94 , B01J23/42 , B01J29/90 , B01J35/57 , B01J35/61 , B01J35/77 , B01J37/00 , B01J37/02 , B01J38/12 , F01N3/20 , F01N3/28
CPC classification number: B01J29/763 , B01D53/9418 , B01D53/944 , B01J23/42 , B01J29/90 , B01J35/57 , B01J35/612 , B01J35/77 , B01J37/0036 , B01J37/0215 , B01J38/12 , F01N3/2066 , F01N3/2803 , B01D2255/1021 , B01D2255/20761 , B01D2255/50 , B01D2255/9155 , B01D2257/404 , B01D2258/012 , B01J2229/186 , F01N2370/04
Abstract: The present invention relates to a SCR catalytic article, comprising —a substrate and —a copper-containing small pore zeolite, having a crystal structure characterized by a decrease of unit cell volume upon sulfurization and desulfurization of less than Å3 as determined by an X-ray powder diffraction, wherein the sulfurization and desulfurization are carried out in accordance with the processes as described in the specification, and to an exhaust treatment system comprising the same. The present invention also relates to a method for determining whether a metal-promoted small pore zeolite is resistant to irreversible sulfur poisoning and a method for evaluating whether a metal-promoted small pore zeolite is qualified for resistance to irreversible sulfur poisoning.
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