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    Catalyst for cleaning up the exhaust gases of a diesel engine
    1.
    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 the operation of a nitrogen oxides storage catalyst
    2.
    发明授权
    Process for the operation of a nitrogen oxides storage catalyst 有权
    氮氧化物储存催化剂的操作方法

    公开(公告)号：US06171565B2

    公开(公告)日：2001-01-09

    申请号：US09227589

    申请日：1999-01-08

    申请人： J{umlaut over (u)}rgen Höhne ,  Wolfgang Strehlau ,  Egbert Lox ,  Thomas Kreuzer

    发明人： J{umlaut over (u)}rgen Höhne ,  Wolfgang Strehlau ,  Egbert Lox ,  Thomas Kreuzer

    IPC分类号： B01D5356

    CPC分类号： B01D53/9445 ,  B01D53/9495 ,  B01D2255/91 ,  F01N3/0842 ,  F01N3/085 ,  F01N9/005 ,  F01N11/00 ,  F01N11/007 ,  F01N2550/03 ,  F01N2570/04 ,  F01N2570/16 ,  F01N2900/0422 ,  F02D41/0275 ,  F02D41/028 ,  F02D2200/0806 ,  F02D2200/0808 ,  Y02A50/2341 ,  Y02T10/22 ,  Y02T10/24 ,  Y02T10/47

    摘要： A process of operating a nitrogen oxides storage catalyst of an exhaust gas treatment system is described. The process relates to the cycling of the normalized air/fuel ratio &lgr;-value of the exhaust gas exiting the engine, in which a lambda value greater than 1 represents oxygen-rich, lean burn conditions in which a sorption phase for the sorption of nitrogen oxides takes place; and in which a lambda value less than 1 represents oxygen-poor, rich burn conditions in which a desorption and conversion phase for the desorption and conversion of nitrogen oxides takes place. The &lgr;-value of the exhaust gas downstream from the storage catalyst is monitored during the desorption and conversion phase to determine the end of the desorption and conversion phase based on the &lgr;-value falling below a predetermined threshold value. Advantages of the process described include the ability to distinguish permanent from temporary damage to the nitrogen oxides storage catalyst, the ability to compensate for the slow deterioration in storage capacity, and the ability to determine when the storage capacity of the catalyst falls below a certain minimum capacity after which the storage catalyst must be either replaced or thermally treated while still installed in the exhaust gas treatment system.

    摘要翻译： 描述了操作废气处理系统的氮氧化物存储催化剂的方法。 该过程涉及离开发动机的废气的归一化空气/燃料比率lambd值的循环，其中大于1的λ值表示富氧的稀燃条件，其中用于吸附氮的吸附相 氧化物发生; 并且其中小于1的λ值表示氧贫，富氧燃烧条件，其中发生用于解吸和转化氮氧化物的解吸和转化相。 在解吸和转化阶段期间监测从储存催化剂下游排出的废气的羔羊值，以基于羔羊值低于预定阈值确定解吸和转化阶段的结束。 所述方法的优点包括将永久物与临时损伤区分为氮氧化物储存催化剂的能力，补偿储存容量缓慢劣化的能力以及确定催化剂的储存容量何时低于某一最低值的能力 容量之后，储存催化剂必须被替换或热处理，同时仍然安装在废气处理系统中。

    Storage material for sulfur oxides
    4.
    发明授权
    Storage material for sulfur oxides 有权
    硫氧化物的储存材料

    公开(公告)号：US06338831B1

    公开(公告)日：2002-01-15

    申请号：US09276903

    申请日：1999-03-26

    申请人： Wolfgang Strehlau ,  Ulrich Göbel ,  Rainer Domesle ,  Egbert Lox ,  Thomas Kreuzer

    发明人： Wolfgang Strehlau ,  Ulrich Göbel ,  Rainer Domesle ,  Egbert Lox ,  Thomas Kreuzer

    IPC分类号： B01D5350

    CPC分类号： B01J20/08 ,  B01D53/508 ,  B01D53/94 ,  B01J20/041 ,  B01J20/28042 ,  B01J20/28057 ,  B01J20/3078 ,  B01J20/3204 ,  B01J20/3236

    摘要： A sulfur oxide storage material contains a magnesium-aluminum spinel (MgO.Al2O3) and can be used as a so-called “sulfur trap” to remove sulfur oxides from oxygen-containing exhaust gases of industrial processes. In particular, it can be used for the catalytic purification of exhaust gas from internal-combustion engines to remove the sulfur oxides from the exhaust gas in order to protect the exhaust gas catalysts from sulfur poisoning. The material displays a molar ratio of magnesium oxide to aluminum oxide in the range of over 1.1:1, and the magnesium oxide present in stoichiometric excess is homogeneously distributed in a highly disperse form in the storage material.

    摘要翻译： 硫氧化物储存材料含有镁 - 铝尖晶石（MgO·Al 2 O 3），并且可以用作所谓的“硫阱”，以从工业过程的含氧废气中除去硫氧化物。 特别地，其可以用于从内燃机排出的废气的催化净化，以从废气中除去硫氧化物，以保护废气催化剂免受硫中毒。 该材料显示氧化铝与氧化铝的摩尔比在1.1:1以上，以化学计量过量存在的氧化镁以高分散形式均匀地分布在储存材料中。

    Process for reducing the nitrogen oxides content of exhaust gas from an internal combustion engine
    7.
    发明授权
    Process for reducing the nitrogen oxides content of exhaust gas from an internal combustion engine 失效
    降低来自内燃机的废气的氮氧化物含量的方法

    公开(公告)号：US06238525B1

    公开(公告)日：2001-05-29

    申请号：US09299630

    申请日：1999-04-27

    申请人： Egbert Lox ,  Jürgen Gieshoff ,  Wolfgang Strehlau ,  Thomas Kreuzer

    发明人： Egbert Lox ,  Jürgen Gieshoff ,  Wolfgang Strehlau ,  Thomas Kreuzer

    IPC分类号： C01B2100

    CPC分类号： F01N3/0842 ,  B01D53/32 ,  B01D53/92 ,  B01D53/9431 ,  F01N3/0807 ,  F01N3/0892 ,  F01N2240/28 ,  F02B1/04

    摘要： A process for reducing the nitrogen oxides content of the exhaust gas from an internal combustion engine includes treating the exhaust gas in an electric gas discharge such that at least one of nitrogen dioxide or nitric acid are formed from nitrogen oxides in the exhaust gas; storing the nitrogen dioxides and/or the nitric acid in the form of nitrates on a nitrogen oxides storage material during phases when the engine operates with a greater than a stoichiometric air/fuel ratio (i.e., the storage phase); decomposing the nitrates to give nitrogen oxides during brief phases when the engine operates with a less than the stoichiometric air/fuel ratio (i.e., the desorption phase); and reducing the nitrogen oxides which are released from the storage material to nitrogen. The nitrogen oxides storage material may be located in an electric gas discharge zone, and the exhaust gas may be passed through the discharge and then over the storage material.

    摘要翻译： 用于降低来自内燃机的废气的氮氧化物含量的方法包括以排气中的氮氧化物形成至少一种二氧化氮或硝酸的电气放电来处理排气， 当发动机以大于化学计量的空气/燃料比（即储存阶段）运转时，在氮氧化物储存材料中将氮氧化物和/或硝酸以硝酸盐的形式储存在相中。 当发动机以小于化学计量的空气/燃料比（即，解吸阶段）运行时，在短时间内分解硝酸盐以产生氮氧化物; 并将从储存材料释放的氮氧化物还原成氮气。 氮氧化物存储材料可以位于电气放电区域中，并且排气可以通过排出物，然后通过存储材料。

    Catalyst system for the treatment of exhaust gases from diesel engines
    8.
    发明授权
    Catalyst system for the treatment of exhaust gases from diesel engines 有权
    用于处理柴油发动机废气的催化剂系统

    公开(公告)号：US06220022B1

    公开(公告)日：2001-04-24

    申请号：US09180112

    申请日：1999-08-04

    申请人： Wilfried Müller ,  Jürgen Leyrer ,  Rainer Domesle ,  Klaus Ostgathe ,  Egbert Lox ,  Thomas Kreuzer

    发明人： Wilfried Müller ,  Jürgen Leyrer ,  Rainer Domesle ,  Klaus Ostgathe ,  Egbert Lox ,  Thomas Kreuzer

    IPC分类号： F01N310

    CPC分类号： B01D53/9454 ,  Y02T10/22

    摘要： A catalyst system for the treatment of exhaust gases from a diesel engine includes a first and a second catalyst reducing catalyst arranged in series in an exhaust gas treatment system. The first catalyst is located near the engine in a region of the exhaust gas treatment system in which the exhaust gas temperature reaches temperatures of more than 200° C. under full engine load. The second catalyst is located further from the engine in a region of the exhaust gas treatment system in which the exhaust gas temperature reaches a maximum of 500° C. under full engine load. The maximum nitrogen oxides reduction in the first catalyst takes place at a lower temperature than the maximum nitrogen oxides reduction in the second catalyst.

    摘要翻译： 用于处理来自柴油发动机的废气的催化剂系统包括在废气处理系统中串联布置的第一和第二催化剂还原催化剂。 第一催化剂位于排气处理系统的区域内的发动机附近，其中在全发动机负荷下，废气温度达到超过200℃的温度。 第二催化剂在排气处理系统的一个区域内比发动机更远，其中在全发动机负荷下废气温度达到最大值500℃。 第一催化剂中的最大氮氧化物还原在比第二催化剂中的最大氮氧化物还原更低的温度下进行。

    Process for checking the operability of an exhaust gas purification catalyst
    9.
    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。