公开(公告)号：US5943858A

公开(公告)日：1999-08-31

申请号：US974259

申请日：1997-11-19

Applicant: Lothar Hofmann ,  Oliver Pfaff ,  Udo Klumpp ,  Wieland Mathes

Inventor： Lothar Hofmann ,  Oliver Pfaff ,  Udo Klumpp ,  Wieland Mathes

IPC: B01D53/86 ,  B01D53/94 ,  F01N3/20 ,  F01N3/00 ,  B29C45/20 ,  A62C5/00

CPC classification number: F01N3/2066 ,  B01D53/8631 ,  B01D53/9431 ,  F01N2610/02 ,  F01N2610/08 ,  Y02T10/24

Abstract: A premixing chamber of a nebulizing device for an exhaust gas purification system serves to mix a compressed gas such as compressed air, for example, with a reducing agent such as urea solution, for example. The premixing chamber is set up on the carburetor principle and includes a compressed gas feed having a taper and a reducing agent feed opening in the region of the taper. The premixing chamber ensures that no deposits originating from the reducing agent can settle in the region of the mixing route. The premixing chamber is provided, in particular, for an exhaust gas purification system of a vehicle fitted with a regulated diesel catalytic converter as well as for stationary diesel engines of up to about 1000 kW (mechanical power).

Abstract translation: 用于排气净化系统的雾化装置的预混合室用于例如将诸如压缩空气的压缩气体与例如尿素溶液等还原剂混合。 预混合室设置在化油器原理上，并且包括在锥形区域中具有锥形和还原剂进料口的压缩气体进料。 预混合室确保源自还原剂的沉积物不会沉淀在混合路线的区域。 特别地，预混合室用于装配有调节柴油催化转化器的车辆的排气净化系统以及高达约1000kW（机械功率）的固定式柴油发动机。

公开(公告)号：US5785937A

公开(公告)日：1998-07-28

申请号：US798517

申请日：1997-02-10

Applicant: Ronald Neufert ,  Wieland Mathes ,  Dagmar Schobert-Schaefer ,  Lothar Hofmann

Inventor： Ronald Neufert ,  Wieland Mathes ,  Dagmar Schobert-Schaefer ,  Lothar Hofmann

IPC: B01D53/30 ,  B01D53/86 ,  B01D53/94 ,  F01N3/20

CPC classification number: F01N3/208 ,  B01D53/30 ,  B01D53/8696 ,  B01D53/9431 ,  B01D53/9495 ,  F01N2560/06 ,  F01N2570/18 ,  F01N2610/02 ,  F01N2610/146 ,  F01N2900/08 ,  F01N2900/1402 ,  F01N2900/1622 ,  Y02T10/24

Abstract: A method is provided in which the reducing agent, during the starting phase of the internal-combustion engine and during operation with decreasing and, if appropriate, virtually constant exhaust gas temperature, is fed superstoichiometrically in relation to the nitrogen oxide concentration, while taking into account the temperature-dependent storage capacity of a denitration catalytic converter for the reducing agent. The reducing agent is otherwise fed substoichiometrically. In this manner, the catalytic converter is kept at all times at a preferred charge level, so that on one hand it is possible to provide sufficient stored reducing agent for the catalytic conversion and on the other hand it is possible to still have a reducing agent buffer available which avoids slip of the reducing agent. The invention can be used in all internal-combustion engines operated with air excess, such as diesel engines and lean-burn engines.

Abstract translation: 提供了一种方法，其中在内燃机的起动阶段和在运行期间还原剂在减少并且如果适当的情况下基本上恒定的排气温度被加入到超氧化物计量相对于氮氧化物浓度的同时， 考虑了用于还原剂的脱硝催化转化器的温度依赖性储存容量。 还原剂另外以化学计量方式进料。 以这种方式，催化转化器始终保持在优选的装料水平，因此一方面可以提供足够的储存的用于催化转化的还原剂，另一方面可以还有还原剂 缓冲剂可以避免还原剂的滑脱。 本发明可以用于所有使用空气过剩的内燃机，例如柴油发动机和稀燃燃烧发动机。

公开(公告)号：US07507684B2

公开(公告)日：2009-03-24

申请号：US11647889

申请日：2006-12-29

Applicant: Lothar Hofmann ,  Jörg Münch ,  Ralf Dotzel

Inventor： Lothar Hofmann ,  Jörg Münch ,  Ralf Dotzel

IPC: B01J29/06

CPC classification number: B01D53/9418 ,  B01D2251/2067 ,  B01D2255/2065 ,  B01D2255/20738 ,  B01D2255/20761 ,  B01D2255/2092 ,  B01D2255/50 ,  B01D2258/012 ,  B01J29/46 ,  B01J29/7615 ,  B01J35/04 ,  B01J37/0009 ,  B01J2229/186 ,  B01J2229/42

Abstract: The invention relates to an extruded solid catalyst body for breaking down nitrogen oxides in the presence of a reducing agent as well as to a process for manufacture of said body. The solid catalyst body has an active material that contains 60 to 87% by weight of an ion-exchanged zeolite containing at least one metal from the group containing Cu, Hf, La, Au, In, V, lanthanoids and transition metals of group VIII of the periodic system, more than 10 to 37% by weight of aluminum oxide and 2 to 10% by weight of inorganic fibers. The solid catalyst body, the active material of which contains a zeolite can be manufactured by extrusion and has a high degree of mechanical stability at a high catalytic activity.

Abstract translation: 本发明涉及用于在还原剂存在下分解氮氧化物的挤出固体催化剂体以及制造所述体的方法。 固体催化剂体具有含有60〜87重量％的含有Cu，Hf，La，Au，In，V，镧系元素和VIII族过渡金属的至少一种金属的离子交换沸石的活性物质 的超过10至37重量％的氧化铝和2至10重量％的无机纤维。 其活性物质含有沸石的固体催化剂体可以通过挤出制造，并且在高催化活性下具有高度的机械稳定性。

公开(公告)号：US06475453B1

公开(公告)日：2002-11-05

申请号：US09133004

申请日：1998-08-12

Applicant: Wieland Mathes ,  Lothar Hofmann ,  Frank Witzel

Inventor： Wieland Mathes ,  Lothar Hofmann ,  Frank Witzel

IPC: B01J2104

CPC classification number: F01N3/2066 ,  B01D53/9431 ,  B01D53/9477 ,  B01J35/04 ,  F01N13/0097 ,  F01N2330/06 ,  F01N2610/02 ,  Y02T10/24

Abstract: A configuration for decomposing nitrogen oxides in a gas stream includes a plurality of catalytic converters disposed one after the other through which the gas stream can flow. Each of the catalytic converters has a honeycomb structure with many parallel cells through which the gas stream can flow. Each of the catalytic converters also has a predetermined cell density and a predetermined average level of activity defined as a proportion by weight of the catalytically active agent. The predetermined cell density of a second catalytic converter through which the gas stream flows after a first catalytic converter is lower than the predetermined cell density of the first catalytic converter. The predetermined average level of activity of the second catalytic converter is also higher than the predetermined average level of activity of the first catalytic converter. The configuration is preferably used in conjunction with an exhaust gas from a combustion drive unit.

Abstract translation: 用于分解气流中的氮氧化物的构造包括多个催化转化器，其一个接一个地设置，气流可以流过。 每个催化转化器具有蜂窝结构，其具有许多平行的气室，气流可以流过该蜂窝结构。 每个催化转化器还具有预定的细胞密度和预定的平均活性水平，定义为催化活性剂的重量比例。 气体流在第一催化转化器之后流过的第二催化转化器的预定电池密度低于第一催化转化器的预定电池密度。 第二催化转化器的预定平均活性水平也高于第一催化转化器的预定平均活性水平。 该结构优选与来自燃烧驱动单元的废气结合使用。

公开(公告)号：US06471927B2

公开(公告)日：2002-10-29

申请号：US09776952

申请日：2001-02-05

Applicant: Lothar Hofmann ,  Klaus Rusch

Inventor： Lothar Hofmann ,  Klaus Rusch

IPC: B01D5354

CPC classification number: C01C1/086 ,  B01D53/8625 ,  B01D53/90 ,  B01J19/126 ,  B01J2219/1218 ,  B01J2219/32466 ,  C01C1/08

Abstract: A microwave hydrolysis reactor for converting urea into ammonia has one or more reaction chambers into which a urea solution is fed via a feed device and a discharge device for discharging an ammonia-water mixture. A catalytic converter is arranged in the reaction chamber. A microwave-transmitting device allows irradiating so that energy is fed to the urea solution in the reaction chamber.

Abstract translation: 用于将尿素转化成氨的微波水解反应器具有一个或多个反应室，尿素溶液经由进​​料装置和用于排出氨 - 水混合物的排出装置供入尿素溶液。 催化转化器布置在反应室中。 微波发射装置允许照射，使得能量被供给到反应室中的尿素溶液。

公开(公告)号：US06470676B2

公开(公告)日：2002-10-29

申请号：US09909388

申请日：2001-07-19

Applicant: Winfried Dölling ,  Lothar Hofmann

Inventor： Winfried Dölling ,  Lothar Hofmann

IPC: F01N300

CPC classification number: F01N3/2066 ,  F01N2570/14 ,  F01N2570/18 ,  F01N2610/02 ,  Y02A50/2344 ,  Y02T10/24

Abstract: A method is provided for the catalytic conversion of nitrogen oxides contained in the exhaust gas of an internal combustion engine. A reducing agent is added in a controlled manner upstream of a denitrification catalyst, as seen in exhaust gas flow direction, and in dependence on a nitrogen oxide concentration. The reducing agent is added in a superstoichiometric amount in relation to the nitrogen oxide content if an operating parameter and/or a value derived from the operating parameter falls below or exceeds a threshold value. The addition of the reducing agent is then terminated or continued in a substoichiometric manner. The invention provides a measure for obtaining an extremely high average nitrogen oxide conversion, especially under varying operating conditions of the internal combustion engine.

Abstract translation: 提供了用于催化转化内燃机排气中所含的氮氧化物的方法。 在脱氮催化剂的上游以可控的方式添加还原剂，如在废气流动方向上所看到的，并且依赖于氮氧化物浓度。 如果操作参数和/或从操作参数导出的值低于或超过阈值，则相对于氮氧化物含量以超化学计量的量加入还原剂。 然后以亚化学计量方式终止或继续加入还原剂。 本发明提供了获得极高平均氮氧化物转化率的措施，特别是在内燃机的变化的操作条件下。

公开(公告)号：US06444177B1

公开(公告)日：2002-09-03

申请号：US08995646

申请日：1997-12-29

Applicant: Raimund Müller ,  Lothar Hofmann ,  Kurt Schardt ,  Wieland Mathes

Inventor： Raimund Müller ,  Lothar Hofmann ,  Kurt Schardt ,  Wieland Mathes

IPC: B01D5386

CPC classification number: F01N3/2066 ,  B01D53/8631 ,  B01D53/8656 ,  B01D53/885 ,  B01F3/04049 ,  B01F5/0065 ,  B01F5/045 ,  B01F2005/0091 ,  F01N13/0097 ,  F01N13/017 ,  F01N2240/20 ,  F01N2240/40 ,  F01N2470/22 ,  F01N2610/02 ,  Y02T10/24

Abstract: Exhaust gas to be cleaned is introduced into a conversion and mixing duct and the exhaust gas flows through the duct along a predetermined longitudinal direction. A reducing agent, such as aqueous urea solution, is injected into the exhaust gas stream in the conversion and mixing duct. The exhaust gas stream is then deflected into a reaction duct which extends parallel to or coaxially around the conversion and mixing duct. The exhaust gas then flows in the opposite direction through the reaction duct. A reduction catalyst is disposed in the reaction duct, where the reducible components of the exhaust gas are reduced. The exhaust gas cleaned in this manner is then discharged from the reaction duct.

Abstract translation: 要清洁的废气被引入转化和混合管道中，排气沿预定的纵向方向流过管道。 还原剂，例如尿素水溶液，被注入到转化和混合管道中的废气流中。 废气流然后被偏转到与转换和混合管道平行或同轴延伸的反应管道中。 废气然后沿相反方向流过反应管。 还原催化剂设置在反应管道中，其中废气的可还原组分被还原。 以这种方式清洁的废气然后从反应管排出。

公开(公告)号：US06209313B1

公开(公告)日：2001-04-03

申请号：US09188723

申请日：1998-11-09

Applicant: Gerhard Wissler ,  Günther Pajonk ,  Lothar Hofmann ,  Manfred Weigl

Inventor： Gerhard Wissler ,  Günther Pajonk ,  Lothar Hofmann ,  Manfred Weigl

IPC: F01N300

CPC classification number: F01N3/2066 ,  F01N2430/00 ,  F01N2610/02 ,  F02D21/08 ,  F02D31/008 ,  F02D41/0235 ,  F02D41/40 ,  F02D2250/36 ,  Y02T10/24 ,  Y02T10/44

Abstract: Excessive NOx emission in a diesel internal combustion engine with SCR exhaust gas treatment is detected by a control unit. The excessive NOx emission value is determined from the catalytic-converter efficiency calculated for the metering of the reducing agent. In response, measures are taken, such as delayed start of the fuel injection, deactivation of a coasting cutoff, reducing an exhaust gas recirculation rate and/or increasing the idling speed. As a result, the NOx content in the untreated exhaust gas drops, the catalytic-converter temperature increases more quickly after a cold start, and the NOx emission is reduced.

Abstract translation: 具有SCR排气处理的柴油内燃机中的NOx排放过多由控制单元检测。 根据对还原剂的计量计算的催化转化器效率来确定过量的NOx排放值。 作为响应，采取措施，例如延迟启动燃料喷射，停止滑行切断，降低废气再循环速率和/或增加怠速。 结果，未处理废气中的NOx含量下降，催化转化器温度在冷启动后升高得更快，NOx排放减少。

公开(公告)号：US20070259770A1

公开(公告)日：2007-11-08

申请号：US11647889

申请日：2006-12-29

Applicant: Lothar Hofmann ,  Jorg Munch ,  Ralf Dotzel

Inventor： Lothar Hofmann ,  Jorg Munch ,  Ralf Dotzel

IPC: B01J29/04

CPC classification number: B01D53/9418 ,  B01D2251/2067 ,  B01D2255/2065 ,  B01D2255/20738 ,  B01D2255/20761 ,  B01D2255/2092 ,  B01D2255/50 ,  B01D2258/012 ,  B01J29/46 ,  B01J29/7615 ,  B01J35/04 ,  B01J37/0009 ,  B01J2229/186 ,  B01J2229/42

Abstract: The invention relates to an extruded solid catalyst body for breaking down nitrogen oxides in the presence of a reducing agent as well as to a process for manufacture of said body. The solid catalyst body has an active material that contains 60 to 87% by weight of an ion-exchanged zeolite containing at least one metal from the group containing Cu, Hf, La, Au, In, V, lanthanoids and transition metals of group VIII of the periodic system, more than 10 to 37% by weight of aluminum oxide and 2 to 10% by weight of inorganic fibers. The solid catalyst body, the active material of which contains a zeolite can be manufactured by extrusion and has a high degree of mechanical stability at a high catalytic activity.

Abstract translation: 本发明涉及用于在还原剂存在下分解氮氧化物的挤出固体催化剂体以及制造所述体的方法。 固体催化剂体具有含有60〜87重量％的含有Cu，Hf，La，Au，In，V，镧系元素和VIII族过渡金属的至少一种金属的离子交换沸石的活性物质 的超过10至37重量％的氧化铝和2至10重量％的无机纤维。 其活性物质含有沸石的固体催化剂体可以通过挤出制造，并且在高催化活性下具有高度的机械稳定性。

公开(公告)号：US06737033B1

公开(公告)日：2004-05-18

申请号：US09677356

申请日：2000-10-02

Applicant: Lothar Hofmann ,  Wieland Mathes

Inventor： Lothar Hofmann ,  Wieland Mathes

IPC: B01D5356

CPC classification number: F01N3/208 ,  B01D53/90 ,  B01D53/9454 ,  F01N2560/026 ,  F01N2610/02 ,  F01N2610/146 ,  F01N2900/08 ,  F01N2900/14 ,  Y02T10/22 ,  Y02T10/24

Abstract: The method and the device are configured for the catalytic removal of a pollutant contained in an exhaust gas of a combustion system using a reagent. A temporal mean, or time average, is formed for the concentration of the pollutant in the exhaust gas. The catalytic converter is laid out for complete conversion if the reagent is introduced stoichiometrically. Here, the reagent is introduced in substoichiometric proportions with respect to the time average of the pollutant content.

Abstract translation: 该方法和装置被配置用于使用试剂催化除去包含在燃烧系统的废气中的污染物。 为排气中污染物的浓度形成时间平均值或时间平均值。 如果试剂以化学计量的方式引入，则催化转化器布置成完全转化。 这里，相对于污染物含量的时间平均值，以化学计量比例引入试剂。