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25 条记录 (耗时 0.026 秒)

    Catalyst system and use thereof
    1.
    发明授权
    Catalyst system and use thereof 有权
    催化剂体系及其用途

    公开(公告)号：US08226914B2

    公开(公告)日：2012-07-24

    申请号：US12527724

    申请日：2008-02-20

    申请人： Paul Spurk ,  Stèphanie Frantz ,  Thomas Le Tallec ,  Olivier Teysset ,  Wilfried Mueller ,  Gerald Jeske

    发明人： Paul Spurk ,  Stèphanie Frantz ,  Thomas Le Tallec ,  Olivier Teysset ,  Wilfried Mueller ,  Gerald Jeske

    IPC分类号： B01D53/62 ,  B01D53/72 ,  B01D53/94 ,  F01N3/10 ,  F01N3/24

    CPC分类号： F01N3/0253 ,  F01N3/035 ,  F01N3/101 ,  F01N3/2803 ,  F01N13/0093 ,  F01N13/0097 ,  F01N2340/02 ,  F01N2430/085 ,  F01N2510/0682 ,  F01N2610/03 ,  Y02T10/22

    摘要： Soot filters for removing soot from the exhaust gas of lean-burn engines become blocked with progressive operating duration on account of the deposition of soot, and must therefore be regenerated at regular intervals. It has been found that reliable operation of the soot filter is possible only if an active regeneration is carried out from time to time by increasing the exhaust-gas temperature to the soot ignition temperature. For this purpose, an oxidation catalytic converter is usually arranged upstream of the soot filter, and the exhaust-gas temperature is increased by means of the catalytic combustion of additionally injected fuel. Here, the oxidation catalytic converter is subjected to high temperature loading and therefore ages very quickly. It has surprisingly been found that the ageing of the oxidation catalytic converter can be slowed if said oxidation catalytic converter is split into at least two separate catalytic converters and the distance between said separate catalytic converters is 2 to 30 mm.

    摘要翻译： 由于烟灰的沉积，用于从贫燃发动机的废气中除去烟灰的烟尘过滤器随着逐渐运行的持续时间而被阻塞，因此必须以规则的间隔再生。 已经发现，仅当通过将废气温度升高到烟灰点火温度来不时地进行主动再生时，烟灰过滤器的可靠操作才是可能的。 为此，氧化催化转化器通常设置在烟尘过滤器的上游，并且通过附加喷射的燃料的催化燃烧来增加废气温度。 这里，氧化催化转化器经受高温负载，因此老化非常快。 令人惊讶地发现，如果所述氧化催化转化器被分成至少两个单独的催化转化器并且所述单独的催化转化器之间的距离为2至30mm，则氧化催化转化器的老化可以减慢。

    CATALYST SYSTEM AND USE THEREOF
    2.
    发明申请
    CATALYST SYSTEM AND USE THEREOF 有权
    催化剂体系及其用途

    公开(公告)号：US20100095658A1

    公开(公告)日：2010-04-22

    申请号：US12527724

    申请日：2008-02-20

    申请人： Paul Spurk ,  Stéphanie Frantz ,  Thomas Le Tallec ,  Olivier Teysset ,  Wilfried Mueller ,  Gerald Jeske

    发明人： Paul Spurk ,  Stéphanie Frantz ,  Thomas Le Tallec ,  Olivier Teysset ,  Wilfried Mueller ,  Gerald Jeske

    IPC分类号： F01N3/10

    CPC分类号： F01N3/0253 ,  F01N3/035 ,  F01N3/101 ,  F01N3/2803 ,  F01N13/0093 ,  F01N13/0097 ,  F01N2340/02 ,  F01N2430/085 ,  F01N2510/0682 ,  F01N2610/03 ,  Y02T10/22

    摘要： Soot filters for removing soot from the exhaust gas of lean-burn engines become blocked with progressive operating duration on account of the deposition of soot, and must therefore be regenerated at regular intervals. It has been found that reliable operation of the soot filter is possible only if an active regeneration is carried out from time to time by increasing the exhaust-gas temperature to the soot ignition temperature. For this purpose, an oxidation catalytic converter is usually arranged upstream of the soot filter, and the exhaust-gas temperature is increased by means of the catalytic combustion of additionally injected fuel. Here, the oxidation catalytic converter is subjected to high temperature loading and therefore ages very quickly. It has surprisingly been found that the ageing of the oxidation catalytic converter can be slowed if said oxidation catalytic converter is split into at least two separate catalytic converters and the distance between said separate catalytic converters is 2 to 30 mm.

    摘要翻译： 由于烟灰的沉积，用于从贫燃发动机的废气中除去烟灰的烟尘过滤器随着逐渐运行的持续时间而被阻塞，因此必须以规则的间隔再生。 已经发现，仅当通过将废气温度升高到烟灰点火温度来不时地进行主动再生时，烟灰过滤器的可靠操作才是可能的。 为此，氧化催化转化器通常设置在烟尘过滤器的上游，并且通过附加喷射的燃料的催化燃烧来增加废气温度。 这里，氧化催化转化器经受高温负载，因此老化非常快。 令人惊讶地发现，如果所述氧化催化转化器被分成至少两个单独的催化转化器并且所述单独的催化转化器之间的距离为2至30mm，则氧化催化转化器的老化可以减慢。

    Exhaust gas treatment units for internal combustion engines and processes for operating them
    9.
    发明授权
    Exhaust gas treatment units for internal combustion engines and processes for operating them 有权
    用于内燃机的废气处理装置及其操作过程

    公开(公告)号：US06725647B2

    公开(公告)日：2004-04-27

    申请号：US10058685

    申请日：2002-01-28

    申请人： Marcus Pfeifer ,  Barry Van Setten ,  Jurgen Gieshoff ,  Paul Spurk ,  Egbert Lox ,  Thomas Kreuzer

    发明人： Marcus Pfeifer ,  Barry Van Setten ,  Jurgen Gieshoff ,  Paul Spurk ,  Egbert Lox ,  Thomas Kreuzer

    IPC分类号： F01N300

    CPC分类号： F01N3/0842 ,  B01D53/9418 ,  B01D53/944 ,  B01D53/945 ,  B01D53/9477 ,  B01D2255/1021 ,  B01D2255/911 ,  F01N3/0814 ,  F01N3/20 ,  F01N13/009 ,  F01N13/0097 ,  Y02T10/22 ,  Y02T10/24

    摘要： The present invention provides an exhaust gas treatment unit for an internal combustion engine. A first catalyst unit produces ammonia from corresponding constituents in a rich exhaust gas composition. A second catalyst unit that is located downstream of the first catalyst unit temporarily stores the ammonia produced by the first catalyst unit in the presence of a rich exhaust gas composition. In the presence of a lean exhaust gas composition, the nitrogen oxides present in the exhaust gas are subjected to a reduction reaction using the temporarily stored ammonia as reducing agent. The exhaust gas treatment unit also contains a third catalyst unit that is located between the other two catalyst units, and oxidizes the nitrogen oxides present in the exhaust gas at lean exhaust gas conditions to a such an extent that 25 to 75 vol. % of the nitrogen oxides entering the second catalyst unit consist of nitrogen dioxide.

    摘要翻译： 本发明提供一种用于内燃机的废气处理单元。 第一催化剂单元从富排气组合物中的相应组分产生氨。 位于第一催化剂单元下游的第二催化剂单元在富排气组合物的存在下临时存储由第一催化剂单元产生的氨。 在贫废气组合物的存在下，使用临时储存的氨作为还原剂对废气中存在的氮氧化物进行还原反应。 排气处理单元还含有位于其他两个催化剂单元之间的第三催化剂单元，并且将贫排气条件下的排气中存在的氮氧化物氧化至25〜75体积％ 进入第二催化剂单元的氮氧化物的％由二氧化氮组成。