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    CATALYST FOR REDUCING NITROGEN-CONTAINING POLLUTANTS FROM THE EXHAUST GASES OF DIESEL ENGINES
    3.
    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。

    Particle Filter Provided with Catalytic Coating
    6.
    发明申请
    Particle Filter Provided with Catalytic Coating 审中-公开
    带有催化涂层的颗粒过滤器

    公开(公告)号：US20080026141A1

    公开(公告)日：2008-01-31

    申请号：US11628657

    申请日：2005-06-04

    申请人： Marcus Pfeifer ,  Rainer Domesle ,  Nicola Soeger ,  Christian Kuehn ,  Roger Staab ,  Thomas Kreuzer

    发明人： Marcus Pfeifer ,  Rainer Domesle ,  Nicola Soeger ,  Christian Kuehn ,  Roger Staab ,  Thomas Kreuzer

    IPC分类号： B01D53/94 ,  B01J35/00 ,  B01J37/02 ,  B05D1/12 ,  F01N3/28

    CPC分类号： B01D53/944

    摘要： The invention relates to particle filters having an open pore structure for separating particles from fluids, which, for modification of their properties or for treatment of the fluid to be filtered, are provided with additional metal oxides or mixed metal oxides and optionally with further catalytically active components. In particular, the invention relates to particle filters treated with a catalytically active material, which is used for the treatment of the waste gases from combustion processes, in particular for the treatment of the exhaust gases of internal combustion engines. By impregnation of the filter bodies in a solution of a metal oxide sol or a mixed metal oxide sol, the preformed sol particles are deposited on the pore surfaces. Consequently, catalytic activations of the filter with good temperature stability in combination with a moderate increase in the exhaust gas back-pressure are possible.

    摘要翻译： 本发明涉及具有用于从流体中分离颗粒的开孔结构的颗粒过滤器，为了改变其性能或处理待过滤的流体，提供另外的金属氧化物或混合金属氧化物，并且任选具有进一步的催化活性 组件。 特别地，本发明涉及用催化活性材料处理的颗粒过滤器，其用于处理来自燃烧过程的废气，特别是用于处理内燃机的废气。 通过在金属氧化物溶胶或混合金属氧化物溶胶的溶液中浸渍过滤体，预先形成的溶胶颗粒沉积在孔表面上。 因此，具有良好的温度稳定性的过滤器的催化活化与废气背压的适度增加相结合是可能的。