EXHAUST AFTERTREATMENT SYSTEM FOR COMPRESSION-IGNITION ENGINES
    4.
    发明申请
    EXHAUST AFTERTREATMENT SYSTEM FOR COMPRESSION-IGNITION ENGINES 审中-公开
    用于压缩点火发动机的排气后处理系统

    公开(公告)号:US20130019589A1

    公开(公告)日:2013-01-24

    申请号:US13185531

    申请日:2011-07-19

    IPC分类号: F01N3/035

    摘要: An internal combustion engine configured to operate in a compression-ignition combustion mode includes an exhaust aftertreatment system. The exhaust aftertreatment system includes a catalyst device fluidly coupled upstream of an ammonia-selective catalytic reduction device. The, catalyst device includes first, second, and third elements fluidly coupled in series. The first element includes a three-way catalytic element, the second element includes a NOx adsorber, and the third element includes an oxidation catalytic element.

    摘要翻译: 构造成以压缩点火燃烧模式工作的内燃机包括排气后处理系统。 排气后处理系统包括在氨选择性催化还原装置的上游流体耦合的催化剂装置。 催化剂装置包括串联流体耦合的第一,第二和第三元件。 第一元件包括三元催化元件,第二元件包括NOx吸附器,第三元件包括氧化催化元件。

    LOW TEMPERATURE OXIDATION OF AMMONIA IN NITRIC ACID PRODUCTION
    9.
    发明申请
    LOW TEMPERATURE OXIDATION OF AMMONIA IN NITRIC ACID PRODUCTION 审中-公开
    硝酸在硝酸生产中的低温氧化

    公开(公告)号:US20120183467A1

    公开(公告)日:2012-07-19

    申请号:US13006460

    申请日:2011-01-14

    IPC分类号: C01B21/38

    摘要: Ammonia in a gas stream comprising oxygen and nitrogen may be effectively completely oxidized to a mixture of NO and NO2 for further processing to nitric acid. The gas stream is flowed over fine particles of La1-xSrxCoO3 and/or La1-xSrxMnO3, and/or La1-xSrxFeO3 where x=about 0.1, 0.2, or 0.3. The particles are supported as catalyst layers on gas stream-contacting surfaces of a flow-through catalyzed oxidation reactor. These relatively inexpensive perovskite-type materials may be used to promote oxidation of ammonia at temperatures below about 450° C. to about 500° C. to selectively produce a mixture of NO and NO2. This mixture is suitable for further oxidation to NO2 for adsorption into water to make nitric acid.

    摘要翻译: 包含氧和氮的气流中的氨可以有效地完全氧化成NO和NO 2的混合物,以进一步加工成硝酸。 气流在La1-xSrxCoO3和/或La1-xSrxMnO3和/或La1-xSrxFeO3的细颗粒上流动,其中x =约0.1,0.2或0.3。 颗粒在流通催化的氧化反应器的气流接触表面上作为催化剂层被支撑。 这些相对便宜的钙钛矿型材料可用于在低于约450℃至约500℃的温度下促进氨的氧化,以选择性地产生NO和NO 2的混合物。 该混合物适于进一步氧化成NO2以吸附到水中以制备硝酸。

    METHOD AND APPARATUS FOR AMMONIA FORMATION IN A CATALYTIC CONVERTER
    10.
    发明申请
    METHOD AND APPARATUS FOR AMMONIA FORMATION IN A CATALYTIC CONVERTER 有权
    在催化转化器中形成氨的方法和装置

    公开(公告)号:US20100293930A1

    公开(公告)日:2010-11-25

    申请号:US12624709

    申请日:2009-11-24

    IPC分类号: F01N3/10

    摘要: An exhaust gas aftertreatment system for treating an engine-out exhaust gas feedstream of a spark-ignition direct-injection engine includes a multi-stage catalytic converter comprising a converter inlet, a converter outlet, and a substrate having a first end associated with the converter inlet and a second end associated with the converter outlet. The substrate further includes a multiplicity of flow passages between the first and second ends of the substrate, a first surface location corresponding to the first end of the substrate, and a second surface location corresponding to the second end of the substrate. A first washcoat stage is applied to the substrate at the first surface location corresponding to the first end of the substrate. A second washcoat stage is applied to the substrate at the second surface location corresponding to the second end of the substrate. The first and second washcoat stages include washcoats formulated to generate hydrogen and ammonia from the engine-out exhaust gas feedstream. An ammonia-selective catalytic reduction device is downstream of the first and second washcoat stages.

    摘要翻译: 一种用于处理火花点火直喷式发动机的发动机排气进料流的废气后处理系统包括多级催化转化器,其包括转化器入口,转换器出口和具有与转换器相关联的第一端的基板 入口和与转换器出口相关联的第二端。 衬底还包括在衬底的第一和第二端之间的多个流动通道,对应于衬底的第一端的第一表面位置和对应于衬底的第二端的第二表面位置。 在对应于衬底的第一端的第一表面位置处,将第一洗涂阶段施加到衬底。 在对应于衬底的第二端的第二表面位置处,将第二洗涂层阶段施加到衬底。 第一和第二洗涂阶段包括配制成从发动机排出的废气进料流产生氢气和氨的洗涂层。 氨选择性催化还原装置在第一和第二洗涂阶段的下游。