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公开(公告)号：US5279997A
公开(公告)日：1994-01-18
申请号：US772298
申请日：1991-10-07
CPC分类号： B01J29/46 , B01D53/8625 , B01D53/9418 , B01D2251/21 , B01D2255/1023 , B01D2255/2063 , B01D2255/20761 , B01D2255/504 , B01D2255/912
摘要： A catalyst system for the selective reduction of gaseous NO.sub.x in the presence of excess oxygen, having a copper-containing ZSM5 zeolite to which a NO.sub.x -containing gas is exposed, and means for introducing a metered volume of finely dispersed, water soluble, oxygen-containing organic compound (alcohol, aldehyde, ketone, ether) into the NO.sub.x -containing gas prior to exposure to the Cu-ZSM5 zeolite.Also, a method of treating automotive exhaust gas emissions, having an excess of oxygen, by the steps of: (a) introducing a water soluble, oxygenated organic compound (steam/oxygenate mixture) into the exhaust gas emissions as a reductant and at a location closely adjacent the source of the exhaust gas generation (in an appropriate amount with respect to the NO.sub.x); (b) substantially immediately exposing the reductant/emission mixture to a transition metal-exchanged high silica ZSM5 zeolite (SiO.sub.2 /Al.sub.2 O.sub.3 of between 10-50) catalyst at a space velocity in the range of 20-80 K hr.sup.-1 ; and (c) sequentially exposing the effluent of such zeolite catalyst to an oxidation catalyst.
摘要翻译： 一种用于在存在过量氧的情况下选择性还原气态NOx的催化剂体系，其具有含有含NO x气体的含铜ZSM5沸石，以及用于引入计量体积的细分散，水溶性， 含有有机化合物（醇，醛，酮，醚）在暴露于Cu-ZSM5沸石之前进入含NO x的气体。 另外，通过以下步骤处理具有过量氧气的汽车废气排放的方法：（a）将水溶性的含氧有机化合物（蒸汽/含氧化合物）引入作为还原剂的废气排放中， 紧邻废气产生源（相对于NOx的适当量）的位置; （b）基本上立即将还原剂/排放混合物以20-80Khr -1的空间速度暴露于过渡金属交换的高二氧化硅ZSM5沸石（10-50）之间的SiO 2 / Al 2 O 3）催化剂; 和（c）将这种沸石催化剂的流出物依次暴露于氧化催化剂。
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公开(公告)号：US5149511A
公开(公告)日：1992-09-22
申请号：US772297
申请日：1991-10-07
CPC分类号： B01J29/46 , B01D53/9418 , B01D53/944 , B01D53/9459 , B01D2251/208 , B01D2251/21 , B01D2255/1021 , B01D2255/1023 , B01D2255/20761 , B01D2255/504 , B01D2258/012
摘要： A catalyst system for the selective reduction of gaseous NO.sub.x in the presence of excess oxygen, having a copper-containing ZSM5 zeolite to which a NO.sub.x -containing gas is exposed, and means for introducing a metered volume of comminuted water-soluble, oxygen-containing organic compound (alcohol, aldehyde, ketone, ether) into the NO.sub.x -containing gas prior to exposure to the Cu-ZSM5 zeolite.Also, a method of treating automotive exhaust gas emissions, having an excess of oxygen, by the steps of: (a) introducing a water-soluble, oxygenated organic compound (steam/oxygenate mixture) into the exhaust gas emissions as a reductant and at a location closely adjacent the source of the exhaust gas generation (in an appropriate amount with respect to the NO.sub.x); (b) substantially immediately exposing the reductant/emission mixture to a transition metal-exchanged high silica ZSM5 zeolite (SiO.sub.2 /Al.sub.2 O.sub.3 of between 10-50) catalyst at a space velocity in the range of 20-80 K hr.sup.-1 ; and (c) sequentially exposing the effluent of such zeolite catalyst to an oxidation catalyst.
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公开(公告)号：US4233189A
公开(公告)日：1980-11-11
申请号：US19816
申请日：1979-03-12
CPC分类号： B01D53/945 , B01J23/464 , B01J37/024 , Y02T10/22
摘要： A catalyst system and method of making the same is taught for treating exhaust gases from an internal combustion engine. A catalyst system includes a substrate and a washcoat on the substrate. The washcoat is formed of zirconia. A catalyst is placed on the washcoat consisting of rhodium metal or rhodium metal with another catalyst metal. By using zirconia as a washcoat, the rhodium is not dissolved into the washcoat during periods when the catalyst system is subjected to high temperature oxidizing conditions, as is the case when a gamma alumina washcoat is used.
摘要翻译： 教导了一种用于处理来自内燃机的废气的催化剂体系及其制备方法。 催化剂体系包括在基材上的基材和修补基面涂层。 修补基面涂层由氧化锆形成。 将催化剂置于由铑金属或铑金属与另一种催化剂金属组成的修补基面涂层上。 通过使用氧化锆作为修补基面涂层，在催化剂体系经受高温氧化条件的时段期间，铑不会溶解到修补基面涂层中，如使用γ-氧化铝修补基面涂层的情况。
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公开(公告)号：US4233188A
公开(公告)日：1980-11-11
申请号：US64317
申请日：1979-08-06
申请人： Haren S. Gandhi , Mordecai Shelef
发明人： Haren S. Gandhi , Mordecai Shelef
IPC分类号： B01D53/94 , B01J23/652 , B01J23/89 , B01J37/04 , B01J23/44 , B01J23/46 , B01J23/64 , B01J23/74
CPC分类号： B01D53/945 , B01J23/652 , B01J23/892 , B01J37/04 , Y02T10/22
摘要： This invention is directed to an equilibrium catalyst for treating oxides of nitrogen, carbon monoxide and unburned hydrocarbons found in an exhaust gas stream from an internal combustion engine. The catalyst includes a substrate, a selective three-way equilibrium catalyst, an oxygen storage material component for maintaining the activity of the equilibrium catalyst during momentary excursions of the exhaust gas stream into oxygen rich conditions, an active metal component for a water gas and steam reforming process which maintains the overall activity of the equilibrium catalyst when treating an exhaust gas stream deficient in oxygen, and a component for oxidation of hydrocarbons and carbon monoxides when the exhaust gas stream is developed from the burning of air mixtures of about stoichiometric proportions.
摘要翻译： 本发明涉及用于处理来自内燃机的废气流中发现的氮，一氧化碳和未燃碳氢化合物的平衡催化剂。 催化剂包括底物，选择性三元平衡催化剂，用于在废气流瞬间偏移到富氧条件下保持平衡催化剂活性的储氧材料组分，水气和蒸汽的活性金属组分 当废气流从大约化学计量比的空气混合物燃烧而展开时，在处理缺氧的废气流时维持平衡催化剂的整体活性的重整方法和用于氧化烃和一氧化碳的组分。
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公开(公告)号：US4062808A
公开(公告)日：1977-12-13
申请号：US719048
申请日：1976-08-30
CPC分类号： B01J23/36 , B01D53/9418 , Y10S502/50
摘要： This disclosure teaches a stabilized rhenium catalyst in which the rhenium does not volatilize away from a catalyst substrate when oxidized to its higher valence state. The rhenium is protected by having sufficient refractory oxide available on the catalyst substrate to trap any higher oxide of rhenium developed when the rhenium is oxidized.
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公开(公告)号：US5210062A
公开(公告)日：1993-05-11
申请号：US750174
申请日：1991-08-26
CPC分类号： B01D53/945 , B01J35/04 , B01J37/0219 , Y02T10/22
摘要： This invention is directed to a method of providing a channeled substrate with a porous washcoat used as a supporting structure for a catalyst. The substrate is coated with a reactive mixture made of components comprising aluminum alkoxide, water, and acid or the alkoxide in an alcohol. The aluminum alkoxide contains hydrolyzable alkoxy groups and has the chemical formula: Al(OR).sub.3, where R is an alkyl or branched alkyl group of 3 to 6 carbon atoms. The method also includes drying and calcining the coating to form a .gamma.-alumina washcoat.
摘要翻译： 本发明涉及提供一种用于催化剂的支撑结构的多孔修补基面涂层的通道衬底的方法。 用由烷醇铝，水和酸或醇中的醇盐组成的反应性混合物涂覆基材。 烷氧基铝含有可水解的烷氧基并具有化学式：Al（OR）3，其中R是3至6个碳原子的烷基或支链烷基。 该方法还包括干燥和煅烧涂层以形成γ-氧化铝修补基面涂层。
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公开(公告)号：US4179413A
公开(公告)日：1979-12-18
申请号：US015573
申请日：1979-02-26
CPC分类号： B01J23/464 , B01J37/14
摘要： The specification teaches a method of enriching a catalyst system in which both platinum and rhodium are present. The enrichment increases the amount of rhodium which is actively available for use as a catalyst. The enrichment is brought about by thermally aging the catalyst system in an oxidizing atmosphere by heating it to a temperature in a range from 650.degree. C. to 875.degree. C. for a period of at least two hours. A thermal aging at a temperature of about 800.degree. C. for a period of 4 to 8 hours is preferred.
摘要翻译： 本说明书提出了一种富含其中存在铂和铑的催化剂体系的方法。 富集增加了可用作催化剂的铑的量。 通过将催化剂体系在650℃〜875℃的温度加热至少2小时的时间，在氧化气氛中使催化剂体系热老化而产生富集。 优选在约800℃的温度下进行4至8小时的热老化。
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公开(公告)号：US4172047A
公开(公告)日：1979-10-23
申请号：US943591
申请日：1978-09-18
CPC分类号： B01J23/464 , B01D53/9413 , B01J37/024
摘要： A catalyst system is taught for treating exhaust gases from an internal combustion engine. The catalyst system includes a substrate and a wash coat on the substrate. The wash coat is formed substantially of alpha phase alumina. A catalyst is placed on the wash coat consisting of rhodium metal or rhodium metal with another catalyst metal. By using alpha phase alumina as the wash coat, the rhodium is not dissolved into the wash coat during periods when the catalyst system is subjected to high temperature oxidizing conditions.
摘要翻译： （PG，1）催化剂系统被教导用于处理来自内燃机的废气。 催化剂体系包括基材和基材上的洗涤涂层。 洗涤涂层基本上由α相氧化铝形成。 将催化剂置于由铑金属或铑金属与另一种催化剂金属组成的洗涤涂层上。 通过使用α相氧化铝作为洗涤涂层，在催化剂体系经受高温氧化条件的时段期间，铑不溶解到洗涤涂层中。
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9.发明授权Ruthenium catalyst system and method of stabilizing a ruthenium catalyst system 失效钌催化剂体系和稳定化催化剂体系的方法
公开(公告)号：US4152299A
公开(公告)日：1979-05-01
申请号：US895195
申请日：1978-04-10
申请人： Haren S. Gandhi , Mordecai Shelef
发明人： Haren S. Gandhi , Mordecai Shelef
CPC分类号： B01J33/00 , B01D53/945 , B01J23/462 , B01J23/894 , B01D2255/1026 , B01D2255/2063 , B01D2255/20753 , B01D2255/402 , Y02T10/22 , Y10S502/525
摘要： Under oxidizing conditions, a ruthenium catalyst system which is not protected will lose ruthenium by volatilization. A method is taught in this specification for stabilizing a ruthenium catalyst system against such volatilization under oxidizing conditions. The method is carried out by applying to a catalyst substrate a ruthenium catalyst system in which the catalytic material under oxidizing conditions is of the type La.sup.+3 Ni.sub.x.sup.+3 Ru.sub.1-x.sup.+3 O.sub.3 wherein x is in the range from 0.1 to 0.9.
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公开(公告)号：US6117581A
公开(公告)日：2000-09-12
申请号：US268126
申请日：1999-03-15
申请人： Mordecai Shelef
发明人： Mordecai Shelef
CPC分类号： H01M4/925 , H01M4/92 , H01M8/1004 , H01M8/1007
摘要： A polymer-electrolyte-membrane fuel cell assembly comprising an ionomeric, conducting polymer membrane, an anode on a first face of the polymer membrane, a cathode on a second face of the polymer membrane, at least one of the anode and the cathode each comprising catalyst support material comprising conductive zeolite particulate material, and noble metal catalysts supported on the catalyst support material.
摘要翻译： 一种聚合物 - 电解质膜燃料电池组件，包括离聚物导电聚合物膜，聚合物膜的第一面上的阳极，聚合物膜的第二面上的阴极，阳极和阴极中的至少一个包括 包含导电沸石颗粒材料的催化剂载体材料和负载在催化剂载体材料上的贵金属催化剂。
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