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    Apparatus and method for vehicle emissions control
    1.
    发明申请
    Apparatus and method for vehicle emissions control 失效
    车辆排放控制装置和方法

    公开(公告)号：US20020121084A1

    公开(公告)日：2002-09-05

    申请号：US09797236

    申请日：2001-03-01

    Applicant: ENGELHARD CORPORATION

    Inventor： Michel Deeba

    IPC: F01N003/00

    CPC classification number: F01N3/2046 ,  F01N3/0814 ,  F01N3/0842 ,  F01N3/0885 ,  F01N3/101 ,  F01N13/009 ,  F01N13/0093 ,  F01N2410/00 ,  F01N2570/04 ,  Y02A50/2324 ,  Y02T10/22 ,  Y02T10/24 ,  Y02T10/26

    Abstract: An apparatus and method for vehicle emissions control. More particularly, an apparatus and method for insuring that the temperature of a vehicle's exhaust gas stream entering the underfloor catalytic converter during engine operation does not exceed the temperature at which the capability of the multi-functional catalyst in the converter to absorb NOx starts to fall off. A first temperature sensor is provided in the exhaust outlet leading from the exhaust manifold of the engine and a second temperature sensor is provided in the catalytic converter. The catalytic converter contains a multi-functional catalyst such as a three-way conversion catalyst and a NOx trap as well as a NOx sensor at its outlet for sensing when NOx breakthrough is occurring. The sensors transmit their readings to a controller which transmits signals to a proportional valve located in the exhaust outlet downstream of the first temperature sensor. In response to the signals received from the controller, the proportional valve divides the exhaust gas stream received from the engine exhaust manifold into a first stream in communication with the catalytic converter and a second stream in communication with a heat exchanger. Any stream exiting the heat exchanger is then blended with the non-heat exchanged stream and the blended stream is passed into the catalytic converter. The amount of the exhaust gas stream in the first conduit will vary from that in the second conduit such that the temperature entering the catalytic converter is maintained in the range of about 300 to about 600null C. during the lean mode operation of the engine and further such that the multi-functional catalyst is periodically purged of NOx and/or SOx.

    Abstract translation: 一种用于车辆排放控制的装置和方法。 更具体地，涉及一种用于确保在发动机运转期间进入地板下催化转化器的车辆的废气流的温度不超过转化器中的多功能催化剂吸收NOx的能力开始下降的温度的装置和方法 关闭 第一温度传感器设置在从发动机的排气歧管引出的排气出口中，并且第二温度传感器设置在催化转化器中。 催化转化器包含多功能催化剂，例如三元转化催化剂和NOx捕集器，以及在其出口处的NOx传感器，用于在发生NOx突破时感测。 传感器将其读数传送到控制器，该控制器将信号发送到位于第一温度传感器下游的排气出口中的比例阀。 响应于从控制器接收的信号，比例阀将从发动机排气歧管接收的废气流分成与催化转化器连通的第一流和与热交换器连通的第二流。 然后将离开热交换器的任何物流与未热交换的流混合，并将混合的物流进入催化转化器。 第一导管中的废气流的量将与第二导管中的排气流量不同，使得在发动机的稀薄模式运行期间进入催化转化器的温度保持在约300至约600℃的范围内， 进一步使得多功能催化剂周期性地清除NOx和/或SOx。

    Enhanced NOx trap having increased durability
    3.
    发明申请
    Enhanced NOx trap having increased durability 失效
    增强的NOx捕集器具有增加的耐久性

    公开(公告)号：US20030045424A1

    公开(公告)日：2003-03-06

    申请号：US09933586

    申请日：2001-08-21

    Applicant: ENGELHARD CORPORATION

    Inventor： Michel Deeba ,  Shau-Lin F. Chen ,  John K. Hochmuth ,  Patrick L. Burk ,  Xinyi Wei

    IPC: B01D053/56 ,  B01J023/34

    CPC classification number: F01N3/0842 ,  B01D53/9431 ,  B01J23/34 ,  B01J23/6562 ,  B01J23/92 ,  B01J37/0201 ,  B01J37/0242 ,  B01J37/0248 ,  F01N3/0814 ,  F01N2250/12 ,  F01N2370/02 ,  F01N2370/22 ,  Y02C20/10 ,  Y02T10/24

    Abstract: A catalytic trap disposed in an exhaust passage of an internal combustion engine which is operated with periodic alternations between lean and stoichiometric or rich conditions, for abatement of NOx in an exhaust gas stream which is generated by the engine. The trap comprises a catalytic trap material and a refractory carrier member on which the catalytic trap material is disposed. The catalytic trap material comprises: (i) a refractory metal oxide support; (ii) a catalytic component effective for promoting the reduction of NOx under stoichiometric or rich conditions; and (iii) a NOx sorbent effective for adsorbing the NOx under lean conditions and desorbing and reducing the NOx to nitrogen under stoichiometric or rich conditions. The NOx sorbent comprises a metal oxide selected from the group consisting of one or alkali metal oxides, alkaline earth metal oxides and mixtures of one or more alkali metal oxides and alkaline earth metal oxides. The manganese component is selected from the group consisting of: (1) a manganese oxide, (2) a mixed oxide of manganese and a transition metal and/or a rare earth metal, (3) a compound of an alkali metal and a manganese oxide, (4) a compound of an alkaline earth metal and a manganese oxide and (5) mixtures of the foregoing oxides and compounds.

    Abstract translation: 设置在内燃机的排气通道中的催化捕集器，其在稀薄和化学计量或富含条件之间的周期性变化下操作，以减少由发动机产生的废气流中的NOx。 捕集器包括催化捕集材料和其上设置有催化捕集材料的耐火载体构件。 催化捕集材料包括：（i）难熔金属氧化物载体; （ii）在化学计量或富含条件下有效促进NOx还原的催化组分; 和（iii）有效地在稀薄条件下吸附NOx的NOx吸附剂，并且在化学计量或富含条件下将NOx解吸并还原成氮。 NOx吸附剂包括选自一种或碱金属氧化物，碱土金属氧化物和一种或多种碱金属氧化物和碱土金属氧化物的混合物的金属氧化物。 锰成分选自：（1）锰氧化物，（2）锰与过渡金属和/或稀土金属的混合氧化物，（3）碱金属和锰的化合物 氧化物，（4）碱土金属和氧化锰的化合物和（5）上述氧化物和化合物的混合物。

    Layered catalyst composite
    5.
    发明申请
    Layered catalyst composite 有权
    层状催化剂复合材料

    公开(公告)号：US20030100447A1

    公开(公告)日：2003-05-29

    申请号：US10003663

    申请日：2001-10-26

    Applicant: ENGELHARD CORPORATION

    Inventor： Michel Deeba ,  John J. Steger ,  Harold N. Rabinowitz ,  John S. Foong

    IPC: B01D053/94 ,  B01J023/40

    CPC classification number: B01D53/945 ,  B01D53/865 ,  B01D2255/1021 ,  B01D2255/1023 ,  B01D2255/1025 ,  B01D2255/902 ,  B01D2255/9025 ,  B01D2255/908 ,  B01D2255/9207 ,  B01J23/63 ,  B01J37/0244 ,  Y02T10/22

    Abstract: The present invention relates to a layered catalyst composite of the type generally referred to as a three-way conversion catalyst having the capability of simultaneously catalyzing the oxidation of hydrocarbons and carbon monoxide and the reduction of nitrogen oxides. The structure of the layered catalyst composite of the present invention is designed wherein there are three layers in conjunction with a carrier: a first layer deposited on the carrier and comprising a high surface area refractory metal oxide; a second layer deposited on the first layer and comprising palladium and/or platinum deposited on a high surface area refractory metal oxide, and having substantially no oxygen storage components; and a third layer deposited on the second layer and comprising platinum and/or rhodium as well as an oxygen storage component, deposited on a high surface area refractory metal oxide.

    Abstract translation: 本发明涉及一种具有同时催化烃和一氧化碳的氧化和还原氮氧化物的能力的通常称为三元转化催化剂的层状催化剂复合物。 设计本发明的层状催化剂复合材料的结构，其中有三层结合载体：沉积在载体上并包含高表面积难熔金属氧化物的第一层; 沉积在第一层上并包含沉积在高表面积难熔金属氧化物上的钯和/或铂，并且基本上没有储氧组分的第二层; 以及沉积在第二层上并且包含铂和/或铑以及沉积在高表面积难熔金属氧化物上的储氧组分的第三层。

    Close coupled catalyst with a SOx trap and methods of making and using the same
    6.
    发明申请
    Close coupled catalyst with a SOx trap and methods of making and using the same 审中-公开
    具有SOx阱的密闭耦合催化剂及其制备和使用方法

    公开(公告)号：US20030039597A1

    公开(公告)日：2003-02-27

    申请号：US09938448

    申请日：2001-08-24

    Applicant: ENGELHARD CORPORATION

    Inventor： Michel Deeba ,  John K. Hochmuth ,  Uwe Dahle ,  Stefan Brandt

    IPC: B01D053/50 ,  B01D053/56 ,  B01D053/94

    CPC classification number: B01D53/9422 ,  B01D53/949 ,  B01D2255/1021 ,  B01D2255/1023 ,  B01D2255/1025 ,  B01D2255/2042 ,  B01D2255/2045 ,  B01D2255/2047 ,  B01D2255/2063 ,  F01N3/0814 ,  F01N3/0842 ,  F01N3/085 ,  F01N3/2006 ,  F01N13/009 ,  F01N2570/04 ,  F01N2570/14 ,  Y02A50/2344 ,  Y02T10/26

    Abstract: The present invention relates to an article comprising a catalyst composition and a method useful for the removal of NOx and SOx contaminants from a gaseous stream, especially gaseous streams containing sulfur oxide contaminants. More specifically, the present invention is concerned with catalysts of the type generally referred to as nullclose coupled catalystsnull which are designed to reduce pollutants in engine exhaust emissions during engine cold start conditions. The article comprises a lean burn gasoline engine having an exhaust outlet, an upstream section having a close coupled catalyst composite in communication with the exhaust outlet, and a downstream section. The upstream close coupled catalyst composite comprises a first support; a first platinum group component; and a SOx sorbent component selected from the group consisting of oxides and mixed oxides of barium, lanthanum, magnesium, manganese, neodymium, praseodymium, and strontium. The downstream section comprises a second support; a second platinum group component; and a NOx sorbent component. The upstream section has substantially no components adversely affecting three-way conversion under operating conditions.

    Abstract translation: 本发明涉及包含催化剂组合物和可用于从气流，特别是含有硫氧化物污染物的气态物流中除去NOx和SO x污染物的方法的制品。 更具体地，本发明涉及通常称为“紧密耦合的催化剂”的催化剂，其被设计为在发动机冷起动条件期间减少发动机废气排放物中的污染物。 该制品包括具有排气出口的稀燃汽油发动机，具有与排气出口连通的紧密耦合的催化剂复合材料的上游部分和下游部分。 上游紧耦合催化剂复合材料包括第一载体; 第一铂族组分; 和选自钡，镧，镁，锰，钕，镨和锶的氧化物和混合氧化物的SOx吸附剂组分。 下游部分包括第二支撑件; 第二铂族组分; 和NOx吸附剂组分。 上游部分基本上没有在操作条件下不利地影响三路转换的部件。

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