公开(公告)号：US09328682B2

公开(公告)日：2016-05-03

申请号：US13121083

申请日：2009-09-21

申请人： Ruediger Hoyer ,  Stefan Franoschek ,  Stephan Eckhoff

发明人： Ruediger Hoyer ,  Stefan Franoschek ,  Stephan Eckhoff

IPC分类号： F01N3/00 ,  F01N3/10 ,  F02D41/02 ,  F01N3/08 ,  F01N9/00 ,  F01N13/00 ,  F02D41/06 ,  F02D41/14

CPC分类号： F02D41/0275 ,  F01N3/0814 ,  F01N3/0842 ,  F01N3/0871 ,  F01N9/00 ,  F01N13/009 ,  F01N13/0093 ,  F01N13/011 ,  F01N2560/025 ,  F01N2560/026 ,  F01N2560/14 ,  F02D41/064 ,  F02D41/1441 ,  F02D41/1463 ,  Y02T10/47

摘要： The present invention relates to a regulating strategy for a special catalytic converter for exhaust-gas aftertreatment. The catalytic converter concept is distinguished in that at least two nitrogen oxide storage catalytic converters are used in the exhaust section of a vehicle. The first, possibly close-coupled unit is followed by one or more nitrogen oxide storage catalytic converters, which are possibly situated in the underbody of the vehicle. The nitrogen oxide storage catalytic converters are then regenerated as a function of the exceedance of nitrogen oxide threshold vales downstream thereof.

摘要翻译： 本发明涉及排气后处理专用催化转化器的调节策略。 催化转化器的概念的区别在于，在车辆的排气段中使用至少两个氮氧化物储存催化转化器。 第一个可能紧密耦合的单元之后是一个或多个氮氧化物存储催化转化器，其可能位于车辆的底部。 然后，氮氧化物存储催化转化器作为其下游氮氧化物阈值超过的函数再生。

公开(公告)号：US08454917B2

公开(公告)日：2013-06-04

申请号：US13144238

申请日：2010-01-27

申请人： Ruediger Hoyer ,  Stephan Eckhoff ,  Thomas R. Pauly

发明人： Ruediger Hoyer ,  Stephan Eckhoff ,  Thomas R. Pauly

IPC分类号： B01D53/94 ,  B01J23/44 ,  B01J32/00 ,  F01N3/10 ,  F01N3/28

CPC分类号： B01J23/58 ,  B01D53/9422 ,  B01D2255/1021 ,  B01D2255/1023 ,  B01D2255/204 ,  B01D2255/2042 ,  B01D2255/206 ,  B01D2255/40 ,  B01D2255/9022 ,  B01D2255/908 ,  B01D2255/91 ,  B01D2258/014 ,  B01J21/10 ,  B01J23/63 ,  B01J35/04 ,  B01J37/024 ,  F01N3/0814 ,  F01N2510/06 ,  Y02A50/2325

摘要： A nitrogen oxide storage catalyst is provided, which has two catalytically active coatings on a support body. The lower coating applied directly to the support body has a nitrogen oxide storage function and includes platinum as a catalytically active component applied to a homogeneous magnesium-aluminum mixed oxide in combination with a nitrogen oxide storage material, in which a nitrogen oxide storage component is likewise present and applied to a homogeneous magnesium-aluminum mixed oxide. The second layer is notable for three-way catalytic activity, and includes palladium applied to aluminum oxide and barium oxide or strontium oxide, but no platinum.

摘要翻译： 提供了一种氮氧化物存储催化剂，其在支撑体上具有两个催化活性涂层。 直接施加到支撑体的下涂层具有氮氧化物存储功能，并且包括铂作为催化活性组分，其应用于均匀的镁 - 铝混合氧化物与氮氧化物储存材料的组合，其中氮氧化物存储组分同样 存在并应用于均匀的镁铝混合氧化物。 第二层对于三元催化活性是显着的，并且包括施加到氧化铝和氧化钡或氧化锶但不含铂的钯。

公开(公告)号：US20100300077A1

公开(公告)日：2010-12-02

申请号：US12599411

申请日：2008-04-16

申请人： Stephan Eckhoff

发明人： Stephan Eckhoff

IPC分类号： F01N3/08 ,  B01J38/06 ,  B01J38/08 ,  B01J38/10

CPC分类号： B01J35/002 ,  B01D53/9422 ,  B01D53/96 ,  B01D2255/2042 ,  B01D2255/2065 ,  B01J23/002 ,  B01J23/63 ,  B01J23/96 ,  B01J38/04 ,  B01J38/06 ,  B01J38/08 ,  B01J2523/00 ,  B01J2523/25 ,  B01J2523/3712 ,  B01J2523/828

摘要： Nitrogen oxide storage catalysts are used to remove the nitrogen oxides present in the lean exhaust gas of lean-burn engines. As a result of the stress due to high temperatures in vehicle operation, they are subject to thermal aging processes which affect both the nitrogen oxide storage components and the noble metals present as catalytically active components.The present invention provides a process with which the catalytic activity of a nitrogen oxide storage catalyst which comprises, in addition to platinum as a catalytically active component, basic compounds of strontium and/or barium on a support material comprising cerium oxide, said catalytic activity being lost owing to the thermal aging process, can be at least partly restored. The two-stage process is based on the fact that strontium and/or barium compounds formed during the thermal aging with the support material, which also comprise platinum, are recycled to the catalytically active forms by controlled treatment with specific gas mixtures.

摘要翻译： 氮氧化物储存催化剂用于去除贫燃发动机的贫废气中存在的氮氧化物。 由于车辆操作中的高温引起的应力的结果，它们受到影响作为催化活性组分存在的氮氧化物存储组分和贵金属两者的热老化过程。 本发明提供了一种氮氧化物储存催化剂的催化活性的方法，除了铂作为催化活性组分之外，还包括锶和/或钡的碱性化合物在包含氧化铈的载体材料上，所述催化活性为 由于热老化过程而损失，可以至少部分恢复。 两阶段工艺是基于以下事实：在热老化期间形成的锶和/或钡化合物与支撑材料（其也包含铂）通过用特定气体混合物的控制处理再循环至催化活性形式。