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    Catalyst system for the reduction of NOx and NH3 emissions
    4.
    发明授权
    Catalyst system for the reduction of NOx and NH3 emissions 有权
    用于减少NOx和NH3排放的催化剂体系

    公开(公告)号：US07640730B2

    公开(公告)日：2010-01-05

    申请号：US11684240

    申请日：2007-03-09

    申请人： Haren S. Gandhi ,  John Vito Cavataio ,  Robert Henry Hammerle ,  Yisun Cheng

    发明人： Haren S. Gandhi ,  John Vito Cavataio ,  Robert Henry Hammerle ,  Yisun Cheng

    IPC分类号： F01N3/00

    CPC分类号： F01N3/0814 ,  B01D53/8631 ,  F01N3/0842 ,  F01N3/108 ,  F01N13/0097 ,  F01N2240/25 ,  F01N2510/06 ,  Y02C20/10 ,  Y02T10/22 ,  Y02T10/24

    摘要： This catalyst system simultaneously removes ammonia and enhances net NOx conversion by placing an NH3—SCR catalyst formulation downstream of a lean NOx trap. By doing so, the NH3—SCR catalyst adsorbs the ammonia from the upstream lean NOx trap generated during the rich pulses. The stored ammonia then reacts with the NOx emitted from the upstream lean NOx trap—enhancing the net NOx conversion rate significantly, while depleting the stored ammonia. By combining the lean NOx trap with the NH3—SCR catalyst, the system allows for the reduction or elimination of NH3 and NOx slip, reduction in NOx spikes and thus an improved net NOx conversion during lean and rich operation.

    摘要翻译： 该催化剂体系同时除去氨并通过将NH 3 -SCR催化剂配制物放置在贫NOx捕集器下游来增强净NOx转化率。 通过这样做，NH3-SCR催化剂从富脉冲期间产生的上游贫NOx捕集器中吸附氨。 然后，储存的氨与从上游的贫NOx捕集器发射的NOx反应 - 显着提高净NOx转化率，同时消耗储存的氨。 通过将贫NOx捕集器与NH3-SCR催化剂结合，该系统允许减少或消除NH3和NOx滑脱，减少NOx尖峰，从而在精益和丰富的运行期间改善净NOx转化率。

    Catalyst system for the reduction of NOx and NH3 emissions
    5.
    发明授权
    Catalyst system for the reduction of NOx and NH3 emissions 有权
    用于减少NOx和NH3排放的催化剂体系

    公开(公告)号：US07332135B2

    公开(公告)日：2008-02-19

    申请号：US10065470

    申请日：2002-10-22

    申请人： Haren S Gandhi ,  John Vito Cavataio ,  Robert Henry Hammerle ,  Yisun Cheng

    发明人： Haren S Gandhi ,  John Vito Cavataio ,  Robert Henry Hammerle ,  Yisun Cheng

    IPC分类号： B01D50/00 ,  F01N3/00

    CPC分类号： F01N3/0814 ,  B01D53/8631 ,  F01N3/0842 ,  F01N3/108 ,  F01N13/0097 ,  F01N2240/25 ,  F01N2510/06 ,  Y02C20/10 ,  Y02T10/22 ,  Y02T10/24

    摘要： This catalyst system simultaneously removes ammonia and enhances net NOx conversion by placing an NH3-SCR catalyst formulation downstream of a lean NOx trap. By doing so, the NH3-SCR catalyst adsorbs the ammonia from the upstream lean NOx trap generated during the rich pulses. The stored ammonia then reacts with the NOx emitted from the upstream lean NOx trap—enhancing the net NOx conversion rate significantly, while depleting the stored ammonia. By combining the lean NOx trap with the NH3-SCR catalyst, the system allows for the reduction or elimination of NH3 and NOx slip, reduction in NOx spikes and thus an improved net NOx conversion during lean and rich operation.

    摘要翻译： 该催化剂体系同时除去氨并通过将NH 3 -SCR催化剂制剂置于贫NOx捕集器下游来增强净NOx转化率。 通过这样做，NH 3 -SCR催化剂从富脉冲期间产生的上游贫NOx捕集器中吸附氨。 然后，储存的氨与从上游的贫NOx捕集器发射的NOx反应 - 显着提高净NOx转化率，同时消耗储存的氨。 通过将贫NOx捕集器与NH 3 -SCR催化剂组合，该系统允许减少或消除NH 3和NO x滑脱，NOx尖峰的减少，因此， 在精益和丰富的运营期间改善净NOx转化率。