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23 条记录 (耗时 0.021 秒)

    RUTHENIUM IMPREGNATED CERIA CATALYST
    3.
    发明申请
    RUTHENIUM IMPREGNATED CERIA CATALYST 审中-公开

    公开(公告)号：US20190153921A1

    公开(公告)日：2019-05-23

    申请号：US16259267

    申请日：2019-01-28

    申请人： BASF Corporation

    发明人： Olga Gerlach ,  Xinyi Wei ,  Andreas Sundermann ,  Emily Schulman ,  Stanley A. Roth

    IPC分类号： F01N3/08 ,  F01N3/20 ,  F01N3/28 ,  B01J20/06

    摘要： The present disclosure generally provides low-temperature nitrogen oxides (NOx) adsorbers used in the treatment of a NOx-containing exhaust gas stream and to methods of preparing and using the same. In particular, the NOx adsorber composition includes an active metal and a metal oxide support, wherein the metal oxide support includes greater than 50% by weight ceria based on the total weight of the NOx adsorber composition, and wherein the active metal includes about 0.01% to about 5% by weight ruthenium based on the total weight of the NOx adsorber composition.

    COMBINED NOx ABSORBER AND SCR CATALYST
    5.
    发明申请
    COMBINED NOx ABSORBER AND SCR CATALYST 审中-公开

    公开(公告)号：US20200230582A1

    公开(公告)日：2020-07-23

    申请号：US16844048

    申请日：2020-04-09

    申请人： BASF CORPORATION

    发明人： Joseph A Patchett ,  Xinyi Wei

    IPC分类号： B01J29/072 ,  B01J29/068 ,  B01J23/10 ,  B01J23/58 ,  B01J23/22 ,  B01J35/00 ,  B01J35/04 ,  B01D53/94 ,  F01N3/20 ,  F01N3/08 ,  F01N3/28 ,  F01N3/035

    摘要： The present invention is directed to selective catalytic reduction catalysts that combine SCR activity with NOx absorber activity. In particular, the disclosed catalytic article includes a substrate having a first and a second material disposed thereon, wherein the first material includes a selective catalytic reduction (SCR) catalyst composition and the second material includes a nitrogen oxides (NOx) absorber composition, wherein the NOx absorber composition does not substantially oxidize ammonia, and wherein the catalytic article is effective to abate NOx from an engine exhaust gas stream. Emission treatment systems for treating an exhaust gas including a catalytic article of the invention are provided, particularly systems that include an injector adapted for the addition of ammonia to the exhaust gas stream located upstream of the catalytic article.

    PLATINUM-CONTAINING CATALYSTS FOR COMBUSTION ENGINES
    6.
    发明申请
    PLATINUM-CONTAINING CATALYSTS FOR COMBUSTION ENGINES 审中-公开

    公开(公告)号：US20180036716A1

    公开(公告)日：2018-02-08

    申请号：US15555233

    申请日：2016-03-03

    申请人： BASF Corporation

    发明人： Xinyi Wei ,  Stanley A. Roth ,  Haiyang Zhu

    IPC分类号： B01J23/42 ,  B01J35/00 ,  B01J37/10 ,  B01J37/00 ,  B01J37/02 ,  B01J23/44 ,  B01J35/04

    摘要： Emissions treatment systems of combustion engines are provided, which comprise a platinum-containing catalyst that is degreened during production, which is before exposure to operating conditions of a vehicle having a diesel engine. The platinum-containing catalyst, in the form of a platinum component on a high surface area refractory metal oxide support, exhibits a vibration frequency of about 2085 to about 2105 cm−1 as measured by CO-DRIFTS. Such catalytic material is essentially-free of platinum oxide species found at greater than about 2110 cm−1 as measured by CO-DRIFTS. Such catalysts can provide excellent and consistent conversion of nitrogen oxide (NO) to nitrogen dioxide (NO2).

    LOW TEMPERATURE NOx ADSORBER WITH ENHANCED HYDROTHERMAL STABILITY
    9.
    发明申请
    LOW TEMPERATURE NOx ADSORBER WITH ENHANCED HYDROTHERMAL STABILITY 有权

    公开(公告)号：US20220212162A1

    公开(公告)日：2022-07-07

    申请号：US17608174

    申请日：2020-05-07

    申请人： BASF CORPORATION

    发明人： Xinyi Wei ,  Xiaoming Xu ,  Evan Vincent Miu

    IPC分类号： B01J20/18 ,  F01N3/08 ,  B01D53/94 ,  B01J20/32 ,  B01J29/67 ,  B01J29/74

    摘要： The present disclosure is directed to Low Temperature NOx-Absorber (LT-NA) catalyst compositions, catalyst articles, and an emission treatment system for treating an exhaust gas, each including the LT-NA catalyst compositions. Further provided are methods for reducing a NOx level in an exhaust gas stream using the catalyst article. In particular, the LT-NA compositions include a zeolite containing a first metal component including palladium and a second metal component which is an alkaline earth metal component, an oxide of an alkaline earth metal component, a rare earth metal component, an oxide of a rare earth metal component, or a combination thereof. The LT-NA compositions exhibit increased low temperature NOx adsorption capacity and enhanced hydrothermal stability.