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    NITRIC OXIDE OXIDATION OVER SILVER-BASED CATALYSTS
    1.
    发明申请
    NITRIC OXIDE OXIDATION OVER SILVER-BASED CATALYSTS 有权
    基于银的催化剂的氧化氮氧化

    公开(公告)号：US20130294989A1

    公开(公告)日：2013-11-07

    申请号：US13664486

    申请日：2012-10-31

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： CALVIN K. KOCH ,  GONGSHIN QI ,  STEVEN J. SCHMIEG ,  WEI LI

    IPC: B01D53/94 ,  F01N3/20

    CPC classification number: B01D53/9477 ,  B01D53/9431 ,  B01D53/944 ,  B01D2255/1021 ,  B01D2255/104 ,  B01D2255/2092 ,  B01D2255/91 ,  B01D2258/012 ,  F01N3/035 ,  F01N3/0814 ,  F01N3/2066 ,  Y02A50/2325

    Abstract: Ag/Al2O3 materials may be packaged in a suitable flow-through reactor, close coupled to the exhaust manifold of a diesel engine, and upstream of other exhaust gas treatment devices, such as a diesel oxidation catalyst and a selective reduction catalyst for NOx. The silver/alumina catalyst material uses hydrogen in a cold-start engine exhaust and serves to oxidize NO to NO2 in the relatively low temperature, hydrocarbon-containing, exhaust during a short period following the engine cold start, and to temporarily store NOx during the start-up period. After the exhaust has heated downstream catalytic devices, the silver yields its nitrogen oxides for conversion to nitrogen by the then-operating devices before NOx is discharged to the atmosphere.

    Abstract translation: Ag / Al2O3材料可以包装在合适的流通反应器中，紧密耦合到柴油发动机的排气歧管，以及其它废气处理装置（例如柴油氧化催化剂和用于NOx的选择性还原催化剂）的上游。 银/氧化铝催化剂材料在冷启动发动机排气中使用氢气，并且用于在发动机冷起动之后的短时间内在相对低温的含烃废气中将NO氧化为NO 2，并在 启动期。 在排气已经加热下游催化装置之后，在NOx排放到大气中之前，银产生其氮氧化物以便通过操作装置转化为氮气。

    SILVER PROMOTED CLOSE-COUPLED NOx ABSORBER
    3.
    发明申请
    SILVER PROMOTED CLOSE-COUPLED NOx ABSORBER 有权
    SILVER PROMOTED紧密耦合的NOx吸收器

    公开(公告)号：US20130294990A1

    公开(公告)日：2013-11-07

    申请号：US13664749

    申请日：2012-10-31

    Applicant: GM Global Technology Operations LLC

    Inventor： CALVIN K. KOCH ,  GONGSHIN QI ,  STEVEN J. SCHMIEG ,  WEI LI

    IPC: B01D53/94

    CPC classification number: B01D53/9477 ,  B01D53/9431 ,  B01D53/944 ,  B01D2255/1021 ,  B01D2255/104 ,  B01D2255/2092 ,  B01D2255/91 ,  B01D2258/012 ,  F01N3/035 ,  F01N3/0814 ,  F01N3/2066 ,  Y02A50/2325

    Abstract: Ag/Al2O3 materials may be packaged in a suitable flow-through reactor, in combination with another material selected as a passive NOx adsorber material (PNA), both the silver material and the adsorber material being close coupled to the exhaust manifold of a diesel engine, and upstream of other catalytic devices, such as a diesel oxidation catalyst and a selective reduction catalyst for NOx. The silver catalyst material uses hydrogen in a cold-start engine exhaust and serves to oxidize NO to NO2 in the relatively low temperature, hydrocarbon-containing, exhaust during a short period following the engine cold start, and to temporarily store NOx during the start-up period. After the flowing exhaust gas stream has heated the PNA and the downstream catalytic devices, the silver yields its nitrogen oxides for conversion to nitrogen by the then-operating devices before NOx is discharged to the atmosphere.

    Abstract translation: Ag / Al 2 O 3材料可以包装在合适的流通反应器中，与被选择为无源NO x吸附剂材料（PNA）的另一种材料组合，银材料和吸附剂材料都紧密耦合到柴油发动机的排气歧管 ，以及其它催化装置的上游，例如柴油氧化催化剂和用于NOx的选择性还原催化剂。 银催化剂材料在冷启动发动机排气中使用氢气，并且用于在发动机冷起动之后的短时间内在相对低温的含烃废气中将NO氧化为NO 2，并且在起动期间临时储存NOx， 上升期 在流动的废气流已经加热PNA和下游催化装置之后，在NOx排放到大气中之前，银产生其氮氧化物以便通过操作装置转化为氮气。

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