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    Structured SCR catalyst for the reduction of nitrogen oxides in the exhaust gas from lean-burn engines using ammonia as reducing agent
    2.
    发明授权
    Structured SCR catalyst for the reduction of nitrogen oxides in the exhaust gas from lean-burn engines using ammonia as reducing agent 有权
    用于使用氨作为还原剂从贫燃发动机的废气中还原氮氧化物的结构化SCR催化剂

    公开(公告)号：US08568678B2

    公开(公告)日：2013-10-29

    申请号：US12307696

    申请日：2007-06-06

    申请人： Nicola Soeger ,  Lothar Mussmann ,  Ralf Sesselmann ,  Katja Adelmann ,  Wolfgang Schneider

    发明人： Nicola Soeger ,  Lothar Mussmann ,  Ralf Sesselmann ,  Katja Adelmann ,  Wolfgang Schneider

    IPC分类号： B01D53/56 ,  C01B33/36 ,  B01D47/00 ,  B01J8/02 ,  B01J29/04 ,  B01J21/00 ,  B01J21/18

    CPC分类号： F01N3/2066 ,  B01D53/9418 ,  B01D2251/2062 ,  B01D2255/102 ,  B01D2255/20707 ,  B01D2255/20723 ,  B01D2255/20738 ,  B01D2255/20761 ,  B01D2255/20776 ,  B01D2255/50 ,  B01D2255/911 ,  B01D2255/9202 ,  B01J29/072 ,  B01J35/0006 ,  B01J37/0246 ,  F01N2370/04 ,  F01N2610/02 ,  Y02A50/2325 ,  Y02T10/24

    摘要： The reductive removal of nitrogen oxides from the exhaust gas from internal combustion engines operated predominantly under lean conditionstakes place in a selective catalytic reduction (SCR) of the nitrogen oxides by means of ammonia or a compound which can be decomposed into ammonia as reducing agent. Conventional SCR catalysts typically have a relatively narrow working temperature window, usually 350° C. to 520° C., in which good nitrogen oxide conversions can be achieved with sufficient selectivity. SCR catalyst formulations whose working window is in the temperature range from 150° C. to 350° C. generally not be used at higher temperatures since they oxidize the ammonia required as reducing 18 agent to nitrogen oxides at above 350° C. To cover the entire exhaust gas temperature range typical of vehicles having been operating internal combustion enginesextending from 200° C. to 600° C., it has therefore mostly been necessary to use complicated exhaust gas systemscontaining a plurality of catalysts having different working temperature ranges. Disclosed is a structured SCR catalyst whose working range extends over a significantly broader temperature window and by means of which complicated exhaust gas units can be considerably simplified, with a saving of components.

    摘要翻译： 来自主要在贫态条件下运行的内燃机废气中的氮氧化物的还原去除通过氨或可分解成氨作为还原剂的化合物置于氮氧化物的选择性催化还原（SCR）中。 常规SCR催化剂通常具有相对窄的工作温度窗口，通常为350℃至520℃，其中可以以足够的选择性实现良好的氮氧化物转化。 工作窗口在150°C至350°C温度范围内的SCR催化剂配方通常不会在较高温度下使用，因为它们会将需要的氨氧化为在高于350°C的氮氧化物所需的氨。 已经运行内燃机的车辆的典型的整个排气温度范围从200℃升高到600℃，因此大多需要使用包含具有不同工作温度范围的多个催化剂的复杂的废气系统。 公开了一种结构化SCR催化剂，其工作范围在明显更宽的温度窗口上延伸，并且借助于这些SCR催化剂可以显着简化复杂的废气单元，同时节省了部件。

    STRUCTURED SCR CATALYST FOR THE REDUCTION OF NITROGEN OXIDES IN THE EXHAUST GAS FROM LEAN-BURN ENGINES USING AMMONIA AS REDUCING AGENT
    3.
    发明申请
    STRUCTURED SCR CATALYST FOR THE REDUCTION OF NITROGEN OXIDES IN THE EXHAUST GAS FROM LEAN-BURN ENGINES USING AMMONIA AS REDUCING AGENT 有权
    结构化的SCR催化剂，用于减少来自使用氨基甲酸酯作为还原剂的精馏燃烧器的排气中的氮氧化物

    公开(公告)号：US20100209327A1

    公开(公告)日：2010-08-19

    申请号：US12307696

    申请日：2007-06-06

    申请人： Nicola Soeger ,  Lothar Mussmann ,  Ralf Sesselmann ,  Katja Adelmann ,  Wolfgang Schneider

    发明人： Nicola Soeger ,  Lothar Mussmann ,  Ralf Sesselmann ,  Katja Adelmann ,  Wolfgang Schneider

    IPC分类号： B01D53/56 ,  B01J29/072 ,  B01D53/94

    CPC分类号： F01N3/2066 ,  B01D53/9418 ,  B01D2251/2062 ,  B01D2255/102 ,  B01D2255/20707 ,  B01D2255/20723 ,  B01D2255/20738 ,  B01D2255/20761 ,  B01D2255/20776 ,  B01D2255/50 ,  B01D2255/911 ,  B01D2255/9202 ,  B01J29/072 ,  B01J35/0006 ,  B01J37/0246 ,  F01N2370/04 ,  F01N2610/02 ,  Y02A50/2325 ,  Y02T10/24

    摘要： The reductive removal of nitrogen oxides from the exhaust gas from internal combustion engines operated predominantly under lean conditions takes place in a selective catalytic reduction (SCR) of the nitrogen oxides by means of ammonia or a compound which can be decomposed into ammonia as reducing agent. Conventional SCR catalysts typically have a relatively narrow working temperature window, usually 350° C. to 520° C., in which good nitrogen oxide conversions can be achieved with sufficient selectivity. SCR catalyst formulations whose working window is in the temperature range from 150° C. to 350° C. generally not be used at higher temperatures since they oxidize the ammonia required as reducing 18 agent to nitrogen oxides at above 350° C. To cover the entire exhaust gas temperature range typical of vehicles having been operating internal combustion engines extending from 200° C. to 600° C., it has therefore mostly been necessary to use complicated exhaust gas systems containing a plurality of catalysts having different working temperature ranges. Disclosed is a structured SCR catalyst whose working range extends over a significantly broader temperature window and by means of which complicated exhaust gas units can be considerably simplified, with a saving of components.

    摘要翻译： 来自主要在贫条件下运行的内燃机的废气中的氮氧化物的还原除去通过氨或可分解成氨作为还原剂的化合物在氮氧化物的选择性催化还原（SCR）中进行。 常规SCR催化剂通常具有相对窄的工作温度窗口，通常为350℃至520℃，其中可以以足够的选择性实现良好的氮氧化物转化。 工作窗口在150°C至350°C温度范围内的SCR催化剂配方通常不会在较高温度下使用，因为它们会将需要的氨氧化为在高于350°C的氮氧化物所需的氨。 已经运行内燃机的车辆的典型的整个排气温度范围从200℃延伸到600℃，因此大多需要使用包含具有不同工作温度范围的多个催化剂的复杂的废气系统。 公开了一种结构化SCR催化剂，其工作范围在明显更宽的温度窗口上延伸，并且借助于这些SCR催化剂可以显着简化复杂的废气单元，同时节省了部件。

    CATALYST FOR REDUCING NITROGEN-CONTAINING POLLUTANTS FROM THE EXHAUST GASES OF DIESEL ENGINES
    5.
    发明申请
    CATALYST FOR REDUCING NITROGEN-CONTAINING POLLUTANTS FROM THE EXHAUST GASES OF DIESEL ENGINES 审中-公开
    用于从柴油发动机排气中降低含氮污染物的催化剂

    公开(公告)号：US20100166628A1

    公开(公告)日：2010-07-01

    申请号：US12301752

    申请日：2007-02-15

    申请人： Nicola Soeger ,  Wolfgang Schneider ,  Yvonne Demel ,  Lothar Mussmann ,  Ralf Sesselmann ,  Thomas Kreuzer

    发明人： Nicola Soeger ,  Wolfgang Schneider ,  Yvonne Demel ,  Lothar Mussmann ,  Ralf Sesselmann ,  Thomas Kreuzer

    IPC分类号： B01D53/54 ,  B01J29/88 ,  B01J29/072 ,  B01D50/00

    CPC分类号： B01D53/9418 ,  B01D53/945 ,  B01D2255/102 ,  B01D2255/20723 ,  B01D2255/20738 ,  B01D2255/20761 ,  B01D2255/20769 ,  B01D2255/20776 ,  B01D2255/50 ,  B01D2255/9022 ,  B01D2258/012 ,  B01J23/42 ,  B01J29/072 ,  B01J35/0006 ,  B01J35/04 ,  B01J37/0244 ,  Y02T10/22 ,  Y02T10/24

    摘要： In exhaust gas purification units for decreasing nitrogen oxides in lean-burn exhaust gas of internal combustion engines by selective catalytic reduction by means of ammonia, introduction of excess ammonia leads to undesirable emissions of unused ammonia. These emissions can be decreased by means of ammonia barrier catalysts. In the ideal case, ammonia is oxidized to nitrogen and water by these catalysts. These require additional space in the exhaust gas purification unit which may have to be taken away from the space provided for the SCR main catalyst. In addition, the use of such ammonia barrier catalysts can result in overoxidation of the ammonia to nitrogen oxides.To overcome these disadvantages, a catalyst containing two superposed layers is proposed for the removal of nitrogen-containing pollutant gases from diesel exhaust gas. The lower layer contains an oxidation catalyst and the upper layer can store at least 20 milliliters of ammonia per gram of catalyst material. This catalyst displays reduced ammonia breakthrough at good SCR conversions in the low-temperature range. It can be used as SCR catalyst having reduced ammonia breakthrough or as ammonia barrier catalyst.

    摘要翻译： 在用于通过氨的选择性催化还原来减少内燃机的贫燃废气中的氮氧化物的废气净化单元中，引入过量的氨会导致不期望的未使用的氨的排放。 这些排放物可以通过氨阻隔催化剂降低。 在理想情况下，这些催化剂将氨氧化成氮和水。 这些在废气净化单元中需要额外的空间，其可能必须从为SCR主催化剂提供的空间中取走。 此外，使用这种氨阻挡催化剂可导致氨对氮氧化物的过氧化。 为了克服这些缺点，提出了一种含有两个重叠层的催化剂，用于从柴油机废气中去除含氮污染物。 下层含有氧化催化剂，上层可以存储至少20毫升氨/克催化剂材料。 该催化剂在低温范围内以良好的SCR转化率显示出降低的氨渗透。 它可以用作具有减少的氨穿透或作为氨阻挡催化剂的SCR催化剂。