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29 条记录 (耗时 0.021 秒)

    Lean NOx trap/conversion catalyst
    25.
    发明授权
    Lean NOx trap/conversion catalyst 失效
    精益NOx捕集/转化催化剂

    公开(公告)号：US06756338B2

    公开(公告)日：2004-06-29

    申请号：US09956424

    申请日：2001-09-19

    申请人： Kwangmo Koo ,  Paul Joseph Andersen

    发明人： Kwangmo Koo ,  Paul Joseph Andersen

    IPC分类号： B01J2300

    CPC分类号： B01J23/78 ,  B01D53/9422 ,  B01D53/944 ,  B01D53/945 ,  B01D2255/1021 ,  B01D2255/2022 ,  B01D2255/20746 ,  B01D2255/91 ,  Y02T10/22

    摘要： A process and composition for converting nitrogen oxides present in exhaust gases produced by an internal combustion engine utilize cobalt and at least one alkali metal or alkaline earth metal as a component of an adsorbent. The process involves contacting the exhaust gas with an adsorbent which adsorbs the nitrogen oxides in lean-burn conditions and recurrently reducing the oxygen concentration of the exhaust gas. During such periods of reduced oxygen concentration, the nitrogen oxides are then desorbed and reduced to nitrogen, thereby reducing the concentration of the nitrogen oxides in the exhaust gas. The composition of the adsorbent comprises an oxide support and at least two components loaded on the support and containing cobalt and at least one alkali metal or alkaline earth metal. The composition demonstrates improved activity at higher temperatures and improved thermal stability.

    摘要翻译： 用于转化由内燃机产生的废气中存在的氮氧化物的方法和组合物使用钴和至少一种碱金属或碱土金属作为吸附剂的组分。 该方法包括使废气与在贫燃条件下吸附氮氧化物的吸附剂接触并且循环地降低废气的氧浓度。 在氧浓度降低的时期，氮氧化物然后解吸并还原成氮气，从而降低排气中氮氧化物的浓度。 吸附剂的组成包括氧化物载体和负载在载体上并含有钴和至少一种碱金属或碱土金属的至少两种组分。 该组合物显示出在较高温度下改善的活性和改善的热稳定性。

    Three-way conversion catalysts and methods for the preparation therefor
    26.
    发明授权
    Three-way conversion catalysts and methods for the preparation therefor 有权
    三元转化催化剂及其制备方法

    公开(公告)号：US06625976B1

    公开(公告)日：2003-09-30

    申请号：US09214944

    申请日：1999-02-08

    申请人： Paul Joseph Andersen ,  Christopher John Bennett ,  Barry John Cooper ,  Phillip Shady

    发明人： Paul Joseph Andersen ,  Christopher John Bennett ,  Barry John Cooper ,  Phillip Shady

    IPC分类号： F01N310

    CPC分类号： B01D53/945 ,  B01J23/8946 ,  B01J37/024 ,  Y02T10/22

    摘要： A platinum group metal three-way conversion catalyst composition containing a high temperature catalytic component and a low temperature catalytic component has each catalytic component present as separate distinct particles in the same washcoat layer. The catalyst composition is prepared from a washcoat slurry containing a high temperature catalyst support material, and a low temperature catalyst support material, each support material being of sufficiently large particle size so as to prevent each support material forming a solution or a sol with the liquid medium of the slurry. The platinum group metal or metals can be impregnated into each support material either after formation of the washcoat on a non-porous refractory, metallic or palletized substrate or before forming the washcoat slurry.

    摘要翻译： 含有高温催化剂组分和低温催化组分的铂族金属三元转化催化剂组合物在相同的修补基面涂层中具有各自独立的不同颗粒的催化组分。 催化剂组合物由含有高温催化剂载体材料和低温催化剂载体材料的修补基面涂料浆料制备，每种载体材料具有足够大的粒径，以防止每种载体材料与液体形成溶液或溶胶 浆液介质。 在无孔耐火材料，金属或码垛基板上形成修补基面涂层之后，或在形成修补基面涂层浆料之前，可将铂族金属或金属浸渍到每种载体材料中。

    LEAN NOx TRAP/CONVERSION CATALYST
    28.
    发明申请
    LEAN NOx TRAP/CONVERSION CATALYST 审中-公开
    LEAN NOx捕获/转化催化剂

    公开(公告)号：US20100178224A1

    公开(公告)日：2010-07-15

    申请号：US12728827

    申请日：2010-03-22

    申请人： Kwangmo Koo ,  Paul Joseph Andersen

    发明人： Kwangmo Koo ,  Paul Joseph Andersen

    IPC分类号： B01D53/56 ,  B01J20/04 ,  B01D53/94

    CPC分类号： B01J23/78 ,  B01D53/9422 ,  B01D53/944 ,  B01D53/945 ,  B01D2255/1021 ,  B01D2255/2022 ,  B01D2255/20746 ,  B01D2255/91 ,  Y02T10/22

    摘要： A process and composition for converting nitrogen oxides present in exhaust gases produced by an internal combustion engine utilize cobalt and at least one alkali metal or alkaline earth metal as a component of an adsorbent. The process involves contacting the exhaust gas with an adsorbent which adsorbs the nitrogen oxides in lean-burn conditions and recurrently reducing the oxygen concentration of the exhaust gas. During such periods of reduced oxygen concentration, the nitrogen oxides are then desorbed and reduced to nitrogen, thereby reducing the concentration of the nitrogen oxides in the exhaust gas. The composition of the adsorbent comprises an oxide support and at least two components loaded on the support and containing cobalt and at least one alkali metal or alkaline earth metal. The composition demonstrates improved activity at higher temperatures and improved thermal stability.

    摘要翻译： 用于转化由内燃机产生的废气中存在的氮氧化物的方法和组合物使用钴和至少一种碱金属或碱土金属作为吸附剂的组分。 该方法包括使废气与在贫燃条件下吸附氮氧化物的吸附剂接触并且循环地降低废气的氧浓度。 在氧浓度降低的时期，氮氧化物然后解吸并还原成氮气，从而降低排气中氮氧化物的浓度。 吸附剂的组成包括氧化物载体和负载在载体上并含有钴和至少一种碱金属或碱土金属的至少两种组分。 该组合物显示出在较高温度下改善的活性和改善的热稳定性。

    Exhaust gas catalyst comprising rhodium, zirconia and rare earth oxide
    29.
    发明授权
    Exhaust gas catalyst comprising rhodium, zirconia and rare earth oxide 有权
    包含铑，氧化锆和稀土氧化物的废气催化剂

    公开(公告)号：US06692712B1

    公开(公告)日：2004-02-17

    申请号：US09720151

    申请日：2001-02-26

    申请人： Paul Joseph Andersen

    发明人： Paul Joseph Andersen

    IPC分类号： B01D5356

    CPC分类号： B01D53/945 ,  B01J23/63 ,  Y02A50/2324 ,  Y02T10/22

    摘要： A catalyst comprising rhodium on a support, the support comprising 52-95% zirconia and 5-48% rare earth oxide, based on the total weight of (a) and (b), the concentration of the rhodium on the support being 0.035-0.35% based on the total weight of the rhodium and the support, and the catalyst containing 1.2-4.0 g per in3 (g per 16.4 cm3) in total of (a) and (b).

    摘要翻译： 在载体上包含铑的催化剂，所述载体包含52-95％的氧化锆和5-48％的稀土氧化物，基于（a）和（b）的总重量，载体上的铑的浓度为0.035〜 相对于铑和载体的总重量为0.35％，并且催化剂含有（a）和（b）总计为1.2-4.0g / in 3（g / 16.4cm 3）。