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。

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。

公开(公告)号：US06534439B2

公开(公告)日：2003-03-18

申请号：US09345787

申请日：1999-07-01

申请人： Hans van den Tillaart ,  Jürgen Leyrer ,  Wolfgang Strehlau ,  Egbert Lox ,  Thomas Kreuzer ,  Carsten Plog ,  Renato Andorf ,  Norbert Markert ,  Thomas Stengel

发明人： Hans van den Tillaart ,  Jürgen Leyrer ,  Wolfgang Strehlau ,  Egbert Lox ,  Thomas Kreuzer ,  Carsten Plog ,  Renato Andorf ,  Norbert Markert ,  Thomas Stengel

IPC分类号： B01J2340

CPC分类号： B01D53/9418 ,  B01D2255/1028 ,  B01D2255/504 ,  B01J23/468 ,  B01J35/006 ,  Y02T10/24

摘要： A catalyst for reducing nitrogen oxides in oxidizing and reducing atmospheres which contains iridium on a support material. Silicon dioxide or a dealuminized zeolite in the acid H form with a modulus of more than 20, preferably more than 100, or mixtures thereof are used as support materials. Iridium is deposited on the external surfaces of these support materials with average particle sizes between 10 and 30 nm. The catalyst is particularly suitable for treating exhaust gases from lean-burn gasoline engines or from diesel engines.

摘要翻译： 用于在氧化还原气氛中还原氮氧化物的催化剂，其在载体材料上含有铱。 酸性H形式的二氧化硅或脱铝沸石的模量大于20，优选大于100，或其混合物用作支撑材料。 铱沉积在这些载体材料的外表面上，平均粒径在10和30nm之间。 该催化剂特别适用于处理来自稀燃汽油发动机或柴油发动机的废气。

公开(公告)号：US06713031B2

公开(公告)日：2004-03-30

申请号：US09851417

申请日：2001-05-09

申请人： Michael Harris ,  Jürgen Leyrer ,  Yvonne Demel ,  Egbert Lox ,  Thomas Kreuzer

发明人： Michael Harris ,  Jürgen Leyrer ,  Yvonne Demel ,  Egbert Lox ,  Thomas Kreuzer

IPC分类号： B01J800

CPC分类号： F01N3/2066 ,  B01D53/9431 ,  B01J21/063 ,  B01J21/066 ,  B01J23/20 ,  B01J23/30 ,  F01N3/2803 ,  F01N2240/40 ,  F01N2510/06 ,  F01N2610/02 ,  Y02A50/2325 ,  Y02T10/24

摘要： A structured catalyst for selective reduction of nitrogen oxides with ammonia using an ammonia-supplying compound. The catalyst is preferably used for exhaust gas treatment of diesel vehicles powered by diesel motors. The catalyst is characterized by the fact that it contains a reduction catalyst for selective reduction of nitrogen oxides with ammonia and a hydrolysis catalyst for the hydrolysis of urea, where the hydrolysis catalyst is applied in the form of a coating onto the reduction catalyst. By this arrangement of the two catalytic functions in one catalyst the exhaust gas system can be made very compactly and space saving. Moreover, advantageous synergistic effects result from the direct contact of the hydrolysis catalyst and the reduction catalyst.

摘要翻译： 使用氨供应化合物用氨选择性还原氮氧化物的结构化催化剂。 该催化剂优选用于由柴油发动机驱动的柴油车辆的废气处理。 催化剂的特征在于它含有用氨选择性还原氮氧化物的还原催化剂和用于水解尿素的水解催化剂，其中水解催化剂以涂层的形式施加到还原催化剂上。 通过在一个催化剂中这两种催化功能的排列，可以使废气系统非常紧凑和节省空间。 此外，由于水解催化剂和还原催化剂的直接接触，有利的协同效应。