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    Control system for mobile NOx SCR applications
    1.
    发明申请
    Control system for mobile NOx SCR applications 失效
    移动式NOx SCR控制系统

    公开(公告)号：US20040128982A1

    公开(公告)日：2004-07-08

    申请号：US10740119

    申请日：2003-12-17

    Applicant: Engelhard Corporation

    Inventor： Joseph A. Patchett ,  Rudolfus Petrus Verbeek ,  Karl Richard Grimston ,  Gary Wayne Rice ,  John Lawrence Calabrese ,  Mathus Van Genderen

    IPC: F01N003/00

    CPC classification number: F01N3/208 ,  B01D53/90 ,  B01D53/9431 ,  B01D53/9495 ,  F01N3/103 ,  F01N5/02 ,  F01N9/005 ,  F01N13/009 ,  F01N2570/18 ,  F01N2610/02 ,  F01N2610/08 ,  F01N2610/12 ,  F01N2900/0404 ,  F01N2900/14 ,  F01N2900/1402 ,  F01N2900/1622 ,  F01N2900/1808 ,  Y02A50/2325 ,  Y02T10/24 ,  Y02T10/47

    Abstract: A diesel powered vehicle is provided with an SCR system which uses an external reducing reagent to convert NOx emissions in a manner which accounts for the effects of NOx transient emissions on the reducing catalyst. Actual NOx emissions produced by the engine are filtered using a variable NOx time constant in turn correlated to the reductant/NOx storage capacity of the reducing catalyst at its current temperature to account for changes in the SCR system attributed to NOx transient emissions. Catalyst temperature is filtered using a variable catalyst time, constant corresponding to current space velocity of the exhaust gas to account for changes in the catalyst temperature attributed to NOx transient emissions. The reductant is metered on the basis of the filtered, corrected NOx concentration applied at a NSR ratio based, in turn, on the filtered, corrected reducing catalyst temperature.

    Abstract translation: 柴油动力车辆设置有SCR系统，其使用外部还原剂来以考虑NOx瞬态排放对还原催化剂的影响的方式转换NOx排放。 由发动机产生的实际NOx排放物使用可变的NOx时间常数进行过滤，这又与还原催化剂在其当前温度下的还原剂/ NOx存储容量相关，以考虑归因于NOx瞬态排放的SCR系统的变化。 使用可变催化剂时间（对应于废气的当前空间速度的常数）来说明催化剂温度，以解释归因于NOx瞬态排放的催化剂温度的变化。 基于经过过滤校正的还原催化剂温度的以NSR比施加的经过滤的经校正的NOx浓度，计量还原剂。

    Vehicular atmosphere cleansing system
    2.
    发明申请
    Vehicular atmosphere cleansing system 有权
    车载气体清洁系统

    公开(公告)号：US20040020359A1

    公开(公告)日：2004-02-05

    申请号：US10615811

    申请日：2003-07-08

    Applicant: ENGELHARD CORPORATION

    Inventor： Gerald S. Koermer ,  Jeffrey B. Hoke ,  Ronald M. Heck ,  Terence C. Poles ,  Edward T. Wolynic

    IPC: B01D053/06

    CPC classification number: B01D53/06 ,  B01D53/885 ,  B01D2257/106 ,  Y10S165/919

    Abstract: A vehicular atmosphere cleansing system utilizes a regenerative wheel having flow channels extending through the wheel coated with an adsorbant. An atmosphere stream passes through a first position dependent portion of the wheel where VOC's including HC's are adsorbed while a heated atmosphere stream passes through a second position dependent regenerative portion of the wheel whereat VOC's are desorbed. The adsorbant is activated carbon having particles of micropore size adhered to the substrate by a silicone binder producing high adsorption efficiencies while withstanding relatively high regenerative heat temperatures resulting from exhaust gas sensible heat. A hydrocarbon senses HC in the desorbed heated atmosphere stream to rotatively and sequentially index pie shaped, segmented portions of the wheel into the wheel's regenerative region while also functioning as the main component of an OBD device for the system.

    Abstract translation: 车辆气氛清洁系统利用具有延伸穿过涂覆有吸附剂的车轮的流动通道的再生轮。 大气流通过车轮的第一位置相关部分，其中包含HC的VOC被吸附，而加热的气流通过轮的第二位置依赖再生部分，VOC被解吸。 吸附剂是具有微孔尺寸的颗粒的活性炭，其通过具有高吸附效率的硅氧烷粘合剂附着到基材上，同时承受由废气显热导致的相对较高的再生热温度。 碳氢化合物感测解吸的加热气氛物流中的HC，以便将轮胎的饼形分段部分旋转并顺序地指向轮的再生区域，同时还用作系统的OBD装置的主要部件。

    Multi-zone catalytic converter
    3.
    发明申请
    Multi-zone catalytic converter 审中-公开
    多区催化转化器

    公开(公告)号：US20040001781A1

    公开(公告)日：2004-01-01

    申请号：US10183863

    申请日：2002-06-27

    Applicant: ENGELHARD CORPORATION

    Inventor： Sanath V. Kumar ,  Harold N. Rabinowitz ,  John J. Steger

    IPC: B01D053/34

    CPC classification number: F01N3/0842 ,  B01D53/945 ,  B01J23/44 ,  B01J35/04 ,  F01N3/0814 ,  F01N3/28 ,  F01N13/0097 ,  F01N2570/16 ,  Y02T10/22

    Abstract: Provided is an exhaust article (catalyst) coated on a single substrate, such as a monolithic honeycomb having a plurality of channels along the axial length of the catalyst. Different washcoat compositions are deposited along the length the channel walls of the substrate beginning from either the inlet or outlet axial end of the substrate to form inlet and outlet catalyst layers, respectively. In the coating process, the channel walls are coated with catalyst washcoat compositions to lengths that are less than the substrates' axial length. The architecture of the resulting catalyst layers defines a plurality of zones along the length of the substrate. The properties of each zone of the catalyst can be optimized to address specific catalyst functions by manipulation of both the coating lengths and the catalyst washcoat compositions.

    Abstract translation: 提供了涂覆在单个基板上的排气制品（催化剂），例如沿着催化剂的轴向长度具有多个通道的整体式蜂窝体。 不同的修补基面涂层组合物沿着衬底的通道壁的长度沉积，从衬底的入口或出口轴向端开始分别形成入口和出口催化剂层。 在涂覆过程中，通道壁涂覆有催化剂修补基面涂层组合物，其长度小于基材的轴向长度。 所得到的催化剂层的结构限定了沿衬底长度的多个区域。 催化剂的每个区域的性质可以通过操纵涂层长度和催化剂修补基面涂料组合物来优化以满足具体的催化剂功能。

    SOx trap for enhancing NOx trap performance and methods of making and using the same
    5.
    发明申请
    SOx trap for enhancing NOx trap performance and methods of making and using the same 审中-公开
    用于提高NOx捕集阱性能的SOx捕集阱及其制造和使用方法

    公开(公告)号：US20030175192A1

    公开(公告)日：2003-09-18

    申请号：US10357773

    申请日：2003-02-04

    Applicant: ENGELHARD CORPORATION

    Inventor： Zhicheng Hu ,  Patrick L. Burk ,  Shau-Lin F. Chen

    IPC: B01D053/60

    CPC classification number: B01D53/94 ,  B01D53/86 ,  B01D53/8637 ,  B01D2257/302 ,  B01D2257/404

    Abstract: The present invention relates to a method and a catalyst composite useful for reducing contaminants in exhaust gas streams containing sulfur oxide contaminants. The method for removing NOx and SOx contaminants from a gaseous stream comprises providing a catalyst composite having a downstream section and an upstream section. The downstream section comprises a first support, a first platinum component, and a NOx sorbent component. The upstream section comprises a second support, a second platinum component, and a SOx sorbent component selected from the group consisting of oxides of Mg, Sr, and Ba. In a sorbing period, a lean gaseous stream comprising NOx and SOx is passed through the upstream section to sorb at least some of the SOx contaminants. The downstream section sorbs and abates the NOx in the gaseous stream. In a SOx desorbing period, the temperature of the gaseous stream is raised to within a desorbing temperature range to thereby desorb and abate at least some of the SOx contaminants in the upstream section. The desorbing temperature range is sufficiently high such that the SOx contaminants are substantially not sorbed in the downstream section. In a NOx desorbing period, the exhaust gas is converted from a lean stream to a rich stream to desorb and reduce at least some of the NOx contaminants from the downstream section.

    Abstract translation: 本发明涉及一种可用于减少含有硫氧化物污染物的废气流中污染物的方法和催化剂复合物。 从气流中除去NOx和SOx污染物的方法包括提供具有下游部分和上游部分的催化剂复合材料。 下游部分包括第一支撑件，第一铂元件和NOx吸附剂部件。 上游部分包括选自Mg，Sr和Ba的氧化物的第二载体，第二铂组分和SO x吸附剂组分。 在吸附期间，包含NOx和SO x的贫气流通过上游段以吸附至少一些SOx污染物。 下游部分吸附并减轻气流中的NOx。 在SOx解吸时期，气流的温度升高到解吸温度范围内，从而解吸和消除上游段中至少一些SOx污染物。 解吸温度范围足够高，使得SOx污染物在下游段基本上不被吸附。 在NOx解吸期间，废气从贫流转化为富流，以解吸并从下游段减少至少一些NOx污染物。

    Hydrogen sulfide-suppressing catalyst compositions
    6.
    发明申请
    Hydrogen sulfide-suppressing catalyst compositions 有权
    硫化氢抑制催化剂组合物

    公开(公告)号：US20030158037A1

    公开(公告)日：2003-08-21

    申请号：US10079450

    申请日：2002-02-20

    Applicant: ENGELHARD CORPORATION

    Inventor： John S. Foong ,  Harold N. Rabinowitz

    IPC: B01J023/58 ,  B01J023/02 ,  B01J023/06

    CPC classification number: B01D53/945 ,  B01J23/58 ,  B01J23/63 ,  B01J37/0244 ,  B01J37/0248 ,  F01N3/2803 ,  Y02T10/22

    Abstract: Hydrogen sulfide formation is suppressed by a three-way conversion catalyst having an underlayer and a topcoat overlying the under layer. The under layer is prepared by dispersing a Group IIa metal oxide such as an oxide of magnesium, calcium, barium or strontium on a carrier such as a refractory metal oxide monolith. A topcoat overlying the undercoat is comprised of a three-way conversion catalyst material such as a platinum-group metal catalytic component, e.g., platinum, palladium, rhodium or mixtures thereof.

    Abstract translation: 通过具有覆盖在下层上的底层和顶涂层的三元转化催化剂抑制硫化氢形成。 通过将诸如镁，钙，钡或锶的氧化物的IIa族金属氧化物分散在诸如难熔金属氧化物整料的载体上来制备底层。 覆盖底涂层的面漆由三元转化催化剂材料如铂族金属催化组分如铂，钯，铑或其混合物组成。

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