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    Emissions treatment system with ammonia-generating and SCR catalysts
    12.
    发明授权
    Emissions treatment system with ammonia-generating and SCR catalysts 有权

    公开(公告)号：US10124292B2

    公开(公告)日：2018-11-13

    申请号：US15590535

    申请日：2017-05-09

    Applicant: BASF Corporation

    Inventor： Chung-Zong Wan ,  Xiaolai Zheng ,  Susanne Stiebels ,  Claudia Zabel ,  Torsten Neubauer ,  R. Samuel Boorse

    IPC: F01N3/10 ,  B01D53/94 ,  F01N3/035 ,  F01N3/08 ,  F01N3/20 ,  F01N13/02 ,  B01D53/58 ,  B01D53/92 ,  F01N3/02 ,  F01N3/021

    Abstract: Provided are emissions treatment systems for an exhaust stream having an ammonia-generating component, such as a NOx storage reduction (NSR) catalyst or a lean NOx trap (LNT) catalyst, and an SCR catalyst disposed downstream of the ammonia-generating catalyst. The SCR catalyst can be a molecular sieve having the CHA crystal structure, for example SSZ-13 or SAPO-34, which can be ion-exchanged with copper. The LNT can be layered, having an undercoat washcoat layer comprising a support material, at least one precious metal, and at least one NOx sorbent selected from the group consisting of alkaline earth elements, rare earth elements, and combinations thereof and a top washcoat layer comprising a support material, at least one precious metal, and ceria in particulate form, the top washcoat layer being substantially free of alkaline earth components. The emissions treatment system is advantageously used for the treatment of exhaust streams from diesel engines and lean burn gasoline engines.

    PALLADIUM DIESEL OXIDATION CATALYST
    17.
    发明申请
    PALLADIUM DIESEL OXIDATION CATALYST 有权

    公开(公告)号：US20220127987A1

    公开(公告)日：2022-04-28

    申请号：US17569628

    申请日：2022-01-06

    Applicant: BASF CORPORATION

    Inventor： Shiang Sung ,  Patrick William McCanty ,  Markus Koegel ,  Susanne Stiebels

    IPC: F01N3/10 ,  B01J23/02 ,  B01J23/42 ,  B01J23/44 ,  B01J23/46 ,  B01J23/63 ,  B01J35/00 ,  B01J37/02 ,  F01N3/20

    Abstract: An oxidation catalyst composite for abatement of exhaust gas emissions from a lean burn engine is provided, the catalyst composite including a carrier substrate having a length, an inlet end and an outlet end, and an oxidation catalyst material coated on the carrier substrate. The oxidation catalyst material can include a first layer and a second layer. The first layer can include a first oxygen storage component that includes ceria and is impregnated with a palladium (Pd) component and a second component including one or more of magnesium (Mg), rhodium (Rh), and platinum (Pt). The second layer can include a refractory metal oxide component impregnated with platinum (Pt) and palladium (Pd), wherein the ratio of Pt to Pd is in the range of about 0:10 to about 10:0.

    Integrated SCR and ammonia oxidation catalyst systems
    18.
    发明授权
    Integrated SCR and ammonia oxidation catalyst systems 有权

    公开(公告)号：US11213789B2

    公开(公告)日：2022-01-04

    申请号：US15757384

    申请日：2016-08-29

    Applicant: BASF Corporation

    Inventor： Marcus Hilgendorff ,  Karifala Dumbuya ,  Claudia Zabel ,  Susanne Stiebels

    IPC: B01J37/02 ,  B01J35/00 ,  B01D53/94 ,  B01J29/76 ,  F01N3/20

    Abstract: A catalyst containing a washcoat including copper or iron on a small pore molecular sieve material having a maximum ring size of eight tetrahedral atoms physically mixed with platinum and rhodium on a refractory metal oxide support including alumina, silica, zirconia, titania, and a physical mixture or a chemical combination or an atomically doped combination thereof is described. A catalyst containing a first washcoat zone substantially free of platinum group metal and including copper or iron on a small pore molecular sieve material having a maximum ring size of eight tetrahedral atoms; and a second washcoat zone including copper or iron on a small pore molecular sieve material having a maximum ring size of eight tetrahedral atoms physically mixed with platinum or platinum and rhodium on a refractory metal oxide support including alumina, silica, zirconia, titania, and a physical mixture or a chemical combination or an atomically doped combination thereof is provided. A method and a system for treating emissions using the catalyst are also described.

    Hydrogen-assisted integrated emission control system
    19.
    发明授权
    Hydrogen-assisted integrated emission control system 有权

    公开(公告)号：US11125133B2

    公开(公告)日：2021-09-21

    申请号：US16500340

    申请日：2018-04-03

    Applicant: BASF CORPORATION

    Inventor： Shiang Sung ,  Torsten Neubauer ,  Pushkaraj R. Patwardhan ,  Susanne Stiebels ,  Claudia Zabel

    IPC: F01N3/08 ,  F01N3/10 ,  F01N3/20 ,  F01N3/28 ,  B01J21/04 ,  B01J23/58 ,  B01J23/656 ,  B01J29/76 ,  B01J35/00 ,  B01J35/04 ,  B01D53/94

    Abstract: The invention provides an emission control system for treatment of an exhaust gas stream that includes an oxidation catalyst composition disposed on a substrate in fluid communication with the exhaust gas stream; at least one selective catalytic reduction (SCR) composition disposed on a substrate downstream from the oxidation catalyst composition, and a hydrogen injection article configured to introduce hydrogen into the exhaust gas stream upstream of the oxidation catalyst composition or downstream of the oxidation catalyst composition and upstream of the at least one SCR composition. The invention also provides a method of treating an exhaust gas stream, the method including receiving the exhaust gas stream into the emission control system of the invention and intermittently introducing hydrogen upstream of the oxidation catalyst article or downstream of the oxidation catalyst article and upstream stream of the SCR article.

    PALLADIUM DIESEL OXIDATION CATALYST
    20.
    发明申请
    PALLADIUM DIESEL OXIDATION CATALYST 审中-公开

    公开(公告)号：US20190331013A1

    公开(公告)日：2019-10-31

    申请号：US16310327

    申请日：2017-06-13

    Applicant: BASF Corporation

    Inventor： Shiang Sung ,  Patrick William McCanty ,  Markus Koegel ,  Susanne Stiebels

    IPC: F01N3/10 ,  B01J23/02 ,  B01J23/44 ,  B01J23/46 ,  B01J23/63 ,  B01J35/00 ,  B01J37/02 ,  B01J23/42 ,  F01N3/20

    Abstract: An oxidation catalyst composite for abatement of exhaust gas emissions from a lean burn engine is provided, the catalyst composite including a carrier substrate having a length, an inlet end and an outlet end, and an oxidation catalyst material coated on the carrier substrate. The oxidation catalyst material can include a first layer and a second layer. The first layer can include a first oxygen storage component that includes ceria and is impregnated with a palladium (Pd) component and a second component including one or more of magnesium (Mg), rhodium (Rh), and platinum (Pt). The second layer can include a refractory metal oxide component impregnated with platinum (Pt) and palladium (Pd), wherein the ratio of Pt to Pd is in the range of about 0:10 to about 10:0.

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