公开(公告)号：US20180296979A1

公开(公告)日：2018-10-18

申请号：US16014979

申请日：2018-06-21

申请人： CATALER CORPORATION

发明人： Makoto TSUJI ,  Hiroto IMAI ,  Shintaro KOBAYASHI

IPC分类号： B01D53/94 ,  B01J29/76 ,  B01J35/04 ,  F01N3/035 ,  F01N3/20 ,  F01N3/08

CPC分类号： B01D53/9418 ,  B01D53/9436 ,  B01D2251/2067 ,  B01D2255/20738 ,  B01D2255/20761 ,  B01D2255/502 ,  B01D2255/808 ,  B01D2255/9032 ,  B01D2255/911 ,  B01D2255/9155 ,  B01D2257/406 ,  B01D2258/012 ,  B01J21/04 ,  B01J23/72 ,  B01J29/7615 ,  B01J29/763 ,  B01J29/85 ,  B01J35/0006 ,  B01J35/04 ,  B01J37/0244 ,  B01J37/0246 ,  B01J37/0248 ,  F01N3/035 ,  F01N3/0821 ,  F01N3/103 ,  F01N3/2066 ,  F01N2370/04 ,  F01N2570/18 ,  F01N2610/02

摘要： An exhaust gas purification material according to the present invention is provided with a particulate filter 10 that traps particulate matter in exhaust gas and contains an SCR catalyst for adsorbing ammonia and reducing NOx in the exhaust gas. A maximum allowable adsorption amount of ammonia adsorbable by the filter 10 differs between an upstream portion 10a of the filter 10 including an exhaust gas inlet-side end 10c, and a downstream portion 10b of the filter 10 including an exhaust gas outlet-side end 10d. The SCR catalyst contained in the upstream portion 10a and the SCR catalyst contained in the downstream portion 10b are qualitatively different. A ratio (B/A) of a maximum allowable adsorption amount of ammonia A in the upstream portion 10a and a maximum allowable adsorption amount of ammonia B in the downstream portion 10b satisfies the relationship 1.1≤(B/A)≤2.

公开(公告)号：US09884293B2

公开(公告)日：2018-02-06

申请号：US15098633

申请日：2016-04-14

申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA

发明人： Kazuhiro Itoh ,  Hiromasa Nishioka ,  Yoshihisa Tsukamoto ,  Hiroshi Ohtsuki ,  Yasumasa Notake

IPC分类号： B01D53/94 ,  F01N3/20 ,  B01J37/02 ,  B01J23/00 ,  B01J23/34 ,  B01J29/072 ,  F01N3/10 ,  F01N9/00

CPC分类号： B01D53/9495 ,  B01D53/9418 ,  B01D2251/2067 ,  B01D2255/20738 ,  B01D2255/20761 ,  B01D2255/50 ,  B01D2255/9022 ,  B01D2255/911 ,  B01D2258/012 ,  B01J23/002 ,  B01J23/34 ,  B01J29/072 ,  B01J37/0244 ,  B01J37/0246 ,  B01J2229/186 ,  B01J2523/00 ,  F01N3/103 ,  F01N3/2066 ,  F01N3/208 ,  F01N9/00 ,  F01N2510/06 ,  F01N2900/1411 ,  F01N2900/1602 ,  F01N2900/1818 ,  Y02T10/24 ,  Y02T10/47 ,  B01J2523/3712 ,  B01J2523/43 ,  B01J2523/72

摘要： An object is to provide technology that enables an NOx catalyst to exercise its NOx reduction capability satisfactorily at any flow speed of the exhaust gas flowing into the NOx catalyst. An exhaust gas purification apparatus for an internal combustion engine includes a selective catalytic reduction NOx catalyst including at least a first catalyst layer having capability of reducing NOx and a second catalyst layer having oxidation capability and arranged closer to a catalyst substrate than the first catalyst layer. The apparatus has a supply valve for adding a specific addition quantity of reducing agent for reducing NOx to inflowing exhaust gas flowing into the selective catalytic reduction NOx catalyst. The apparatus further has a controller that is configured to control addition of the reducing agent by the supply valve based on the flow speed of the inflowing exhaust gas in such a way that the concentration of the reducing agent in a reducing agent atmosphere formed in the inflowing exhaust gas in a reducing agent addition period becomes equal to a specific concentration that is determined based on the flow speed of the inflowing exhaust gas and at which the reducing agent is assumed not to reach the second catalyst layer, when the temperature of the selective catalytic reduction NOx catalyst exceeds a specific temperature at which reduction of NOx by the first catalyst layer is carried out.

公开(公告)号：US09878287B2

公开(公告)日：2018-01-30

申请号：US15183834

申请日：2016-06-16

申请人： Johnson Matthey Public Limited Company

发明人： Jing Lu ,  Joseph Fedeyko ,  Hai-Ying Chen

IPC分类号： B01D53/58 ,  B01D53/94 ,  B01J23/42 ,  B01J23/54 ,  B01J23/70 ,  B01J29/00 ,  F01N3/20 ,  B01J29/76 ,  F01N3/28 ,  B01J21/04 ,  B01J29/70 ,  B01J29/80 ,  B01J37/02 ,  B01J29/068 ,  B01J29/072 ,  B01J29/076 ,  B01J29/44 ,  B01J35/04

CPC分类号： B01D53/9418 ,  B01D53/9431 ,  B01D2251/2062 ,  B01D2255/1021 ,  B01D2255/20738 ,  B01D2255/20761 ,  B01D2255/2092 ,  B01D2255/50 ,  B01D2255/9022 ,  B01D2255/911 ,  B01D2257/404 ,  B01D2257/406 ,  B01J21/04 ,  B01J23/42 ,  B01J29/068 ,  B01J29/072 ,  B01J29/076 ,  B01J29/44 ,  B01J29/70 ,  B01J29/763 ,  B01J29/80 ,  B01J35/04 ,  B01J37/0244 ,  B01J37/0246 ,  B01J2229/18 ,  B01J2229/36 ,  F01N3/2066 ,  F01N3/2828 ,  F01N2330/06 ,  F01N2370/04 ,  F01N2510/068 ,  F01N2570/14 ,  F01N2570/18 ,  Y02A50/2344 ,  Y02C20/10 ,  Y02T10/24

摘要： Catalysts having a blend of platinum on a support with low ammonia storage with a Cu-SCR catalyst or an Fe-SCR catalyst are disclosed. The catalysts can also contain one or two additional SCR catalysts. The catalysts can be present in one of various configurations. Catalytic articles containing these catalysts are disclosed. The catalytic articles are useful for selective catalytic reduction (SCR) of NOx in exhaust gases and in reducing the amount of ammonia slip. Methods for producing such articles are described. Methods of using the catalytic articles in an SCR process, where the amount of ammonia slip is reduced, are also described.

公开(公告)号：US20170321582A1

公开(公告)日：2017-11-09

申请号：US15520289

申请日：2015-09-30

申请人： Bosch Corporation

发明人： Eiji Nakao ,  Fumiyasu Kurogi ,  Akira Kunishima ,  Atsushi Kikuchi ,  Hiroyuki Watanabe ,  Syogo Tashiro ,  Wataru Domon

IPC分类号： F01N3/20 ,  B01D53/90

CPC分类号： F01N3/208 ,  B01D53/90 ,  B01D53/9431 ,  B01D2251/2067 ,  B01D2255/911 ,  B01D2258/012 ,  F01N2560/06 ,  F01N2610/02 ,  F01N2610/10 ,  F01N2610/146 ,  F01N2900/1806

摘要： An amount of electric power consumption by a battery is reduced, and deterioration of a coil is suppressed by efficiently heating an injector and melting urea crystals at an early stage.A control device for a reducing agent injection device fills the device with a reducing agent at a start-up of an internal combustion engine and executes control for injecting the reducing agent into an exhaust passage of the internal combustion engine by the injector. The control device includes an energization control section that executes energization control in which, after an exhaust temperature of the internal combustion engine becomes equal to or higher than a specified threshold value, a temperature of the injector is increased by energizing the coil of the injector for a specified time and melting of the crystals of the reducing agent precipitated in the injector is promoted.

公开(公告)号：US20170122175A1

公开(公告)日：2017-05-04

申请号：US15407819

申请日：2017-01-17

申请人： Cummins Inc.

发明人： Ashko Kumar ,  Krishna Kamasamudram ,  Jinyong Luo

IPC分类号： F01N3/28 ,  B01J35/04 ,  B01J35/00 ,  B01J29/076 ,  F01N3/10 ,  B01J23/22 ,  F01N3/035 ,  F01N13/00 ,  F01N3/20 ,  B01D53/94 ,  B01J29/072

CPC分类号： F01N3/2803 ,  B01D53/9418 ,  B01D53/9477 ,  B01D2255/20723 ,  B01D2255/20738 ,  B01D2255/20761 ,  B01D2255/50 ,  B01D2255/9032 ,  B01D2255/904 ,  B01D2255/911 ,  B01D2255/9155 ,  B01D2258/012 ,  B01J23/22 ,  B01J29/072 ,  B01J29/076 ,  B01J35/0006 ,  F01N3/035 ,  F01N3/106 ,  F01N3/2066 ,  F01N13/009 ,  F01N13/0097 ,  F01N2370/04 ,  F01N2510/063 ,  F01N2510/0682 ,  F01N2610/02 ,  Y02T10/24

摘要： Unique SCR catalyst including multiple washcoat formulations with differing performance characteristics are disclosed. One exemplary embodiment is an apparatus including a catalyst substrate defining a plurality of flow channels leading from an inlet to an outlet, a first washcoat composition distributed over a first portion of the flow channels, and a second washcoat composition distributed over a second portion of the flow channels. The first washcoat composition has a lower ammonia storage density than the second washcoat composition.

公开(公告)号：US20160312678A1

公开(公告)日：2016-10-27

申请号：US15136427

申请日：2016-04-22

申请人： Cummins Inc.

发明人： Rohan A. Siddhanthi ,  Bryon D. Staebler ,  Krishna Kamasamudram

IPC分类号： F01N3/20 ,  B01D53/96 ,  B01D53/94 ,  F01N13/00 ,  F01N3/035

CPC分类号： F01N3/2066 ,  B01D53/9418 ,  B01D53/9431 ,  B01D53/9477 ,  B01D2251/2062 ,  B01D2255/20723 ,  B01D2255/20738 ,  B01D2255/20761 ,  B01D2255/50 ,  B01D2255/904 ,  B01D2255/911 ,  B01D2257/404 ,  B01D2258/012 ,  F01N3/021 ,  F01N13/0093 ,  F01N2240/40 ,  F01N2510/063 ,  F01N2610/02 ,  Y02C20/10 ,  Y02T10/24

摘要： An exhaust aftertreatment system configured to reduce nitrous oxide (N2O) formation includes a first selective catalytic reduction (SCR) catalyst. The first SCR catalyst is configured for low N2O formation and low ammonia (NH3) storage capacity. A second SCR catalyst is positioned downstream of the first SCR catalyst. The second SCR catalyst is configured for high NH3 storage capacity.

摘要翻译： 构造成减少一氧化二氮（N2O）形成的排气后处理系统包括第一选择性催化还原（SCR）催化剂。 第一个SCR催化剂配置为低N2O形成和低氨（NH3）储存能力。 第二SCR催化剂位于第一SCR催化剂的下游。 第二SCR催化剂被配置为具有高的NH 3储存能力。

公开(公告)号：US09267408B2

公开(公告)日：2016-02-23

申请号：US13853527

申请日：2013-03-29

申请人： MAN Truck & Bus AG

发明人： Andreas Doering

IPC分类号： F01N3/00 ,  F01N3/08 ,  F01N3/20 ,  F01N3/023 ,  F01N13/00 ,  F02D41/02 ,  F02D41/38 ,  F02D41/40 ,  B01D53/94

CPC分类号： F01N3/08 ,  B01D53/9418 ,  B01D53/944 ,  B01D53/9477 ,  B01D2251/2062 ,  B01D2255/20723 ,  B01D2255/50 ,  B01D2255/911 ,  B01D2255/9155 ,  B01D2258/012 ,  F01N3/0231 ,  F01N3/208 ,  F01N13/009 ,  F02D41/0275 ,  F02D41/029 ,  F02D41/3836 ,  F02D41/401 ,  Y02T10/24 ,  Y02T10/44

摘要： A method for an exhaust-gas aftertreatment system which is operated on an internal combustion engine operated with an excess of air, in which exhaust-gas aftertreatment system soot particles are separated out of exhaust gas by a particle filter and the particle filter is regenerated with the aid of NO2 formed on an NO oxidation catalytic converter mounted upstream of the particle filter. A reduction of the nitrogen oxides is realized by a reducing agent which splits to form ammonia being metered into the exhaust-gas flow upstream of the particle filter and the particle filter is laden with a catalytically active material for the selective catalytic reduction of nitrogen oxides. The NH3 to NOx ratio (feed ratio α) is varied in phases by changing the nitrogen oxide untreated emissions and/or the supplied amount of reducing agent, in such a way that the feed ratio α alternates in phases between values of greater than one and values of less than one.

摘要翻译： 一种废气后处理系统的方法，该排气后处理系统在用过量的空气操作的内燃机上运行，​​其中废气后处理系统烟灰颗粒通过颗粒过滤器从排气中分离出来，并且颗粒过滤器用 在安装在颗粒过滤器上游的NO氧化催化转化器上形成的NO 2的帮助。 氮氧化物的还原通过分解成形成氨的还原剂来实现，该还原剂被计量到在颗粒过滤器上游的排气流中，并且颗粒过滤器装载有用于氮氧化物的选择性催化还原的催化活性材料。 通过改变氮氧化物未经处理的排放物和/或还原剂的供给量，NH 3与NO x比（进料比α）的相位变化，使得进料比α在大于1的值之间相位交替， 值小于1。

公开(公告)号：US20160038878A1

公开(公告)日：2016-02-11

申请号：US14813646

申请日：2015-07-30

申请人： JOHNSON MATTHEY PUBLIC LIMITED COMPANY

发明人： Olivier SONNTAG ,  Tim GENSCHOW ,  Andrew NEWMAN ,  Isabel Zoe TINGAY ,  Gudmund SMEDLER

IPC分类号： B01D53/94 ,  F02B37/00 ,  F01N3/20 ,  F01N3/08 ,  B01J29/80 ,  B01J29/072

CPC分类号： B01D53/9431 ,  B01D53/9418 ,  B01D53/9422 ,  B01D53/9436 ,  B01D53/9472 ,  B01D53/9477 ,  B01D53/9481 ,  B01D2255/20738 ,  B01D2255/20761 ,  B01D2255/50 ,  B01D2255/502 ,  B01D2255/904 ,  B01D2255/911 ,  B01D2255/9155 ,  B01D2258/012 ,  B01J29/072 ,  B01J29/46 ,  B01J29/7615 ,  B01J29/763 ,  B01J29/80 ,  B01J35/0006 ,  B01J35/04 ,  F01N3/035 ,  F01N3/0814 ,  F01N3/0821 ,  F01N3/0842 ,  F01N3/106 ,  F01N3/2066 ,  F01N13/0093 ,  F01N2510/0682 ,  F01N2510/0684 ,  F01N2570/14 ,  F02B37/00 ,  Y02T10/24

摘要： Provided is a system for treating an exhaust gas comprising a first SCR catalyst zone comprising an iron loaded medium- or large-pore molecular sieve having a first ammonia storage capacity; and a second SCR catalyst zone comprising a copper loaded small-pore molecular sieve having a second ammonia storage capacity, wherein the first SCR catalyst zone is disposed upstream of the second SCR catalyst zone with respect to normal exhaust gas flow through the system and wherein the second ammonia storage capacity is greater than the first ammonia storage capacity. Also provided is a method for using the system to treat exhaust gas.

摘要翻译： 本发明提供一种处理废气的系统，其包括第一SCR催化剂区域，该第一SCR催化剂区域包括具有第一氨储存能力的载有铁的中孔或大孔分子筛; 以及第二SCR催化剂区，其包含具有第二氨储存能力的铜负载小孔分子筛，其中所述第一SCR催化剂区相对于通过所述系统的正常废气流布置在所述第二SCR催化剂区的上游，并且其中 第二氨储存能力大于第一氨储存能力。 还提供了一种使用该系统来处理废气的方法。

公开(公告)号：US09255510B2

公开(公告)日：2016-02-09

申请号：US12400156

申请日：2009-03-09

申请人： Charles E. Solbrig ,  Ognyan N. Yanakiev

发明人： Charles E. Solbrig ,  Ognyan N. Yanakiev

IPC分类号： F01N3/00 ,  F01N3/20 ,  B01D53/90 ,  B01D53/94 ,  F02D41/02 ,  F02D41/14

CPC分类号： F01N3/208 ,  B01D53/90 ,  B01D53/9418 ,  B01D53/944 ,  B01D53/9477 ,  B01D53/9495 ,  B01D2251/2067 ,  B01D2255/911 ,  F01N2570/18 ,  F01N2610/02 ,  F01N2900/0404 ,  F01N2900/0408 ,  F01N2900/1402 ,  F01N2900/1616 ,  F01N2900/1622 ,  F02D41/0235 ,  F02D41/1462 ,  F02D41/1463 ,  F02D2041/1469 ,  Y02T10/24

摘要： A control system includes an upstream nitrogen oxide (NOx) control module that increases an upstream NOx level based on an initial upstream NOx level in an exhaust system, and an ammonia (NH3) storage condition detection module that detects a NH3 storage condition based on a difference in a downstream NOx level before and after the upstream NOx level is increased. A method includes increasing an upstream NOx level based on an initial upstream NOx level in an exhaust system, and detecting an NH3 storage condition based on a difference in a downstream NOx level before and after the upstream NOx level is increased.

摘要翻译： 控制系统包括：上游氮氧化物（NOx）控制模块，其基于排气系统中的初始上游NOx水平增加上游NOx水平;以及氨（NH 3）保存条件检测模块，其基于 在上游NOx水平之前和之后的下游NOx水平的差异增加。 一种方法包括基于排气系统中的初始上游NOx水平来增加上游NOx水平，并且基于在上游NOx水平增加之前的下游NOx水平的差异来检测NH 3储存条件。

公开(公告)号：US09017626B2

公开(公告)日：2015-04-28

申请号：US14208817

申请日：2014-03-13

申请人： BASF Corporation

发明人： Weiyong Tang ,  Jaya L. Mohanan

IPC分类号： B01D53/94 ,  F01N3/10 ,  F01N3/24 ,  B01J21/06 ,  B01J23/22 ,  B01J23/30 ,  B01J23/00 ,  B01J23/745 ,  B01J29/06 ,  B01J29/072 ,  B01J29/70 ,  B01J29/76 ,  F01N3/20

CPC分类号： B01D53/9431 ,  B01D53/9404 ,  B01D53/9418 ,  B01D2255/2047 ,  B01D2255/2065 ,  B01D2255/20707 ,  B01D2255/20715 ,  B01D2255/20723 ,  B01D2255/20738 ,  B01D2255/20761 ,  B01D2255/20776 ,  B01D2255/2092 ,  B01D2255/40 ,  B01D2255/50 ,  B01D2255/9022 ,  B01D2255/9032 ,  B01D2255/911 ,  B01J21/04 ,  B01J21/063 ,  B01J21/066 ,  B01J23/02 ,  B01J23/10 ,  B01J23/22 ,  B01J23/30 ,  B01J23/72 ,  B01J23/745 ,  B01J29/061 ,  B01J29/072 ,  B01J29/7015 ,  B01J29/72 ,  B01J29/763 ,  B01J35/0006 ,  B01J37/0036 ,  B01J37/0244 ,  F01N3/10 ,  F01N3/2066 ,  F01N2510/0682 ,  F01N2510/0684 ,  F01N2570/18 ,  Y02C20/10 ,  Y02T10/24 ,  Y10S502/52712 ,  Y10S502/52713

摘要： Described are SCR catalyst systems comprising a first SCR catalyst composition and a second SCR catalyst composition arranged in the system, the first SCR catalyst composition promoting higher N2 formation and lower N2O formation than the second SCR catalyst composition, and the second SCR catalyst composition having a different composition than the first SCR catalyst composition, the second SCR catalyst composition promoting lower N2 formation and higher N2O formation than the first SCR catalyst composition. The SCR catalyst systems are useful in methods and systems to catalyze the reduction of nitrogen oxides in the presence of a reductant.

摘要翻译： 描述了包括第一SCR催化剂组合物和布置在该体系中的第二SCR催化剂组合物的SCR催化剂体系，所述第一SCR催化剂组合物促进比第二SCR催化剂组合物更高的N 2形成和较低的N 2 O生成，并且所述第二SCR催化剂组合物具有 与第一SCR催化剂组合物不同的组成，第二SCR催化剂组合物促进比第一SCR催化剂组合物更低的N 2形成和更高的N 2 O形成。 SCR催化剂体系可用于在还原剂存在下催化还原氮氧化物的方法和系统。