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    Process for checking the operability of an exhaust gas purification catalyst
    1.
    发明授权
    Process for checking the operability of an exhaust gas purification catalyst 有权
    用于检查废气净化催化剂的可操作性的方法

    公开(公告)号：US06739176B2

    公开(公告)日：2004-05-25

    申请号：US09809355

    申请日：2001-03-16

    申请人： Ulrich Neuhausen ,  Harald Klein ,  Egbert Lox ,  Jürgen Gieshoff ,  Thomas Kreuzer

    发明人： Ulrich Neuhausen ,  Harald Klein ,  Egbert Lox ,  Jürgen Gieshoff ,  Thomas Kreuzer

    IPC分类号： G01M1500

    CPC分类号： F01N11/002 ,  F01N11/00 ,  F01N11/005 ,  F01N2550/02 ,  F02B3/06 ,  Y02T10/47

    摘要： A process for checking the operability of an exhaust gas purification catalyst for diesel engines, which has a light-off temperature and a degree of conversion rCO for carbon monoxide (CO), by direct measurement of the carbon monoxide concentration in combination with a temperature measurement. To evaluate the remaining catalytic activity of the catalyst the difference &Dgr;T between the current catalyst exit temperature TE of the exhaust gas and the light-off temperature TCO,50%,fresh of the fresh catalyst for carbon monoxide stored as a function of the speed and load &Dgr;T=TE−TCO,50%,fresh is determined and the degree of conversion rCO for carbon monoxide is ascertained.

    摘要翻译： 通过一氧化碳浓度的直接测量与温度测量结合来检查具有一氧化碳（CO）的起燃温度和转化度rCO的用于柴油机的排气净化催化剂的可操作性的方法 。 为了评估催化剂的剩余催化活性，废气的当前催化剂出口温度TE与起燃温度TCO之间的差值ΔTT为50％，一氧化碳新鲜催化剂的新鲜作为速度存储， 确定负载，并确定一氧化碳的转化程度rCO。

    Process for preparing a catalyst
    5.
    发明授权
    Process for preparing a catalyst 有权
    催化剂的制备方法

    公开(公告)号：US06342465B1

    公开(公告)日：2002-01-29

    申请号：US09205280

    申请日：1998-12-04

    申请人： Harald Klein ,  Jürgen Leyrer ,  Rainer Domesle ,  Egbert Lox ,  Thomas Kreuzer

    发明人： Harald Klein ,  Jürgen Leyrer ,  Rainer Domesle ,  Egbert Lox ,  Thomas Kreuzer

    IPC分类号： B01J2342

    CPC分类号： B01J23/40 ,  B01J37/0248

    摘要： A process for preparing a catalyst which has a catalytically active coating of high surface area finely divided materials and catalytically active components on an inert carrier structure. A powder mixture of the finely divided materials used is impregnated with a solution of precursor compounds of the catalytically active components. By suitable combination of the finely divided materials and the precursor compounds and appropriate management of the impregnation process, a highly dispersed deposition and adsorption of the catalytically active components is ensured on the finely divided materials. Then ai aqueous coating dispersion is produced using the impregnated powder mixture and the carrier structure is coated therewith. The coating is then dried and calcined.

    摘要翻译： 一种在惰性载体结构上制备具有高表面积细碎材料和催化活性组分的催化活性涂层的催化剂的方法。 所使用的细碎材料的粉末混合物用催化活性组分的前体化合物的溶液浸渍。 通过精细分散的材料和前体化合物的合适组合以及浸渍过程的适当管理，在精细分散的材料上确保高度分散的催化活性组分的沉积和吸附。 然后使用浸渍的粉末混合物制备ai水性涂料分散体，并用其涂覆载体结构。 然后将涂层干燥并煅烧。

    Catalyst for cleaning up the exhaust gases of a diesel engine
    7.
    发明授权
    Catalyst for cleaning up the exhaust gases of a diesel engine 有权
    用于清洁柴油发动机废气的催化剂

    公开(公告)号：US06677264B1

    公开(公告)日：2004-01-13

    申请号：US09442633

    申请日：1999-11-18

    申请人： Harald Klein ,  Wolfgang Strehlau ,  Egbert Lox ,  Thomas Kreuzer ,  Wilfried Müller

    发明人： Harald Klein ,  Wolfgang Strehlau ,  Egbert Lox ,  Thomas Kreuzer ,  Wilfried Müller

    IPC分类号： B01J2116

    CPC分类号： B01D53/945 ,  B01J23/58 ,  B01J23/63 ,  B01J29/068 ,  B01J37/0244 ,  B01J37/0246 ,  F02B3/06 ,  Y02T10/22

    摘要： A catalyst for purifying exhaust gases of a diesel engine. The catalyst contains two functional layers superimposed on an inert supporting body, whereby the first layer, which is situated directly on the supporting body, has a nitrogen oxide storage function and the second layer, which is in direct contact with the exhaust gas, has a catalytic function. The second functional layer additionally has a hydrocarbon-storage function and its catalytic function is provided by catalytically active noble metals of the platinum group which are deposited in highly dispersed form on finely divided, acidic carrier materials. Nitrogen oxides in the oxygen-rich exhaust gas of a diesel engine can be converted with optimal utilization of the reductive constituents contained in the exhaust gas. For this purpose, no reducing agents going beyond the reductive components (carbon monoxide and hydrocarbons) which are contained as a consequence of incomplete combustion need to be added to the exhaust gas. Nevertheless, rates of conversion in respect of the nitrogen oxides are obtained, averaged over practical driving cycles, which lie distinctly above the rates of conversion of conventional reduction catalysts.

    摘要翻译： 一种用于净化柴油发动机废气的催化剂。 催化剂含有叠置在惰性支撑体上的两个功能层，由此直接位于支撑体上的第一层具有氮氧化物存储功能，与废气直接接触的第二层具有 催化功能。 第二功能层另外具有烃储存功能，其催化功能由铂组的催化活性贵金属提供，其以高度分散形式沉积在细分的酸性载体材料上。 柴油发动机的富氧废气中的氮氧化物可以通过废气中所含的还原成分的最佳利用来转化。 为此，不需要在排气中加入超过由于不完全燃烧而含有的还原成分（一氧化碳和碳氢化合物）的还原剂。 然而，获得了关于氮氧化物的转化率，在实际的驱动循环中是平均的，其明显高于常规还原催化剂的转化速率。

    Process for regenerating the catalytic activity of a catalyst that is located in the exhaust gas line of a diesel engine and that has at least one oxidizing function
    10.
    发明授权
    Process for regenerating the catalytic activity of a catalyst that is located in the exhaust gas line of a diesel engine and that has at least one oxidizing function 有权
    再生催化剂的催化活性的方法，所述催化剂位于柴油发动机的排气管线中并具有至少一种氧化功能

    公开(公告)号：US06691509B2

    公开(公告)日：2004-02-17

    申请号：US10056813

    申请日：2002-01-24

    申请人： Michael Hoffman ,  Harald Klein ,  Thomas Kreuzer

    发明人： Michael Hoffman ,  Harald Klein ,  Thomas Kreuzer

    IPC分类号： F01N300

    CPC分类号： F02D41/024 ,  F02B3/06 ,  F02D41/027 ,  F02D41/1446 ,  F02D41/405 ,  Y02T10/26 ,  Y02T10/44

    摘要： The present invention provides a process for regenerating the catalytic activity of catalysts that have oxidizing functions. A catalyst that is located in the exhaust gas line of a diesel engine that preferably contains a catalytically active coating on a honeycomb carrier that does not have a filter function and that has at least one oxidizing function is regenerated. As a result of time-restricted increases in the exhaust gas temperature upstream of the catalyst to a value greater than 450° C., the combustion of soot particles and hydrocarbons deposited on the catalyst is initiated, and thus, the catalytic activity of the catalyst is at least partly regenerated.

    摘要翻译： 本发明提供了具有氧化功能的催化剂的催化活性再生方法。 催化剂位于柴油发动机的排气管线中，优选在蜂窝状载体上含有不具有过滤功能并具有至少一种氧化功能的催化活性涂层。 作为催化剂上游排气温度上升到大于450℃的时间限制的结果，引发了沉积在催化剂上的烟灰颗粒和烃的燃烧，因此催化剂的催化活性 至少部分再生。