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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：US4006102A
公开(公告)日：1977-02-01
申请号：US607658
申请日：1975-08-25
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.
摘要翻译： 本公开教导了稳定的铼催化剂，其中当氧化成其较高价态时，铼不会从催化剂底物挥发。 通过在催化剂衬底上具有足够的难熔氧化物来保护铼，以捕获当铼被氧化时所产生的铼的任何更高的氧化物。
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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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7.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：US08240132B2
公开(公告)日：2012-08-14
申请号：US11684246
申请日：2007-03-09
IPC分类号： F01N3/00
CPC分类号： F01N3/0814 , B01D53/8631 , F01N3/0842 , F01N3/108 , F01N13/0097 , F01N2240/25 , F01N2510/06 , Y02C20/10 , Y02T10/22 , Y02T10/24
摘要： This catalyst system simultaneously removes ammonia and enhances net NO, conversion by placing an NH3-SCR catalyst formulation downstream of a lean NOx trap. By doing so, the NH3-SCR catalyst adsorbs the ammonia from the upstream lean NOx trap generated during the rich pulses. The stored ammonia then reacts with the NOx emitted from the upstream lean NOx trap—enhancing the net NOx conversion rate significantly, while depleting the stored ammonia. By combining the lean NOx trap with the NH3-SCR catalyst, the system allows for the reduction or elimination of NH3 and NOx slip, reduction in NOx spikes and thus an improved net NOx conversion during lean and rich operation.
摘要翻译： 该催化剂体系同时去除氨并通过将NH 3 -SCR催化剂配制物放置在贫NOx捕集器下游来增强净NO，转化率。 通过这样做，NH3-SCR催化剂从富脉冲期间产生的上游贫NOx捕集器中吸附氨。 然后，储存的氨与从上游的贫NOx捕集器发射的NOx反应 - 显着提高净NOx转化率，同时消耗储存的氨。 通过将贫NOx捕集器与NH3-SCR催化剂结合，该系统允许减少或消除NH3和NOx滑脱，减少NOx尖峰，从而在精益和丰富的运行期间改善净NOx转化率。
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公开(公告)号：US20100209321A1
公开(公告)日：2010-08-19
申请号：US12706558
申请日：2010-02-16
IPC分类号： B01D53/94
CPC分类号： F01N3/0814 , B01D53/8631 , F01N3/0842 , F01N3/108 , F01N13/0097 , F01N2240/25 , F01N2510/06 , Y02C20/10 , Y02T10/22 , Y02T10/24
摘要： This catalyst system simultaneously removes ammonia and enhances net NOx conversion by placing an NH3—SCR catalyst formulation downstream of a lean NOx trap. By doing so, the NH3—SCR catalyst adsorbs the ammonia from the upstream lean NOx trap generated during the rich pulses. The stored ammonia then reacts with the NOx emitted from the upstream lean NOx trap-enhancing the net NOx conversion rate significantly, while depleting the stored ammonia. By combining the lean NOx trap with the NH3—SCR catalyst, the system allows for the reduction or elimination of NH3 and NOx slip, reduction in NOx spikes and thus an improved net NOx conversion during lean and rich operation.
摘要翻译： 该催化剂体系同时除去氨并通过将NH 3 -SCR催化剂配制物放置在贫NOx捕集器下游来增强净NOx转化率。 通过这样做，NH3-SCR催化剂从富脉冲期间产生的上游贫NOx捕集器中吸附氨。 然后，储存的氨与从上游的贫NOx捕集器发射的NOx反应 - 显着提高净NOx转化率，同时消耗储存的氨。 通过将贫NOx捕集器与NH3-SCR催化剂结合，该系统允许减少或消除NH3和NOx滑脱，减少NOx尖峰，从而在精益和丰富的运行期间改善净NOx转化率。
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公开(公告)号：US5081092A
公开(公告)日：1992-01-14
申请号：US461965
申请日：1990-01-08
CPC分类号： B01D53/944 , B01J37/0219
摘要： Sacrificial use of amino polymers to modify the crystal structure of platinum derived from chlorine compounds in a method to oxidize hydrocarbons, comprising: (a) preparing a polymer modifier by controllably reacting amine with epoxy resin to form a soluble adduct and adding to the adduct a solvent to form a homogeneous amino polymer solution; (b) coating a granular support material with platinum/chlorine compounds; and (c) mixing the coated support material with the polymer solution and heating the mixture to evaporate the solvent and to decompose and eliminate the polymer, leaving the coated granules with platinum in a morphologically changed condition devoid of amino polymer but having enhanced catalytic effectiveness for promoting oxidation of hydrocarbons. The amine is of a primary or secondary amine, preferably the hydroxyethyl group. The epoxy is a soluble resin comprising two or more epoxide groups per molecule, i.e., dihydric phenol or dihydric alcohol. The polymer modifier is preferably a soluble amino polymer having a molecular weight of 500-50,000 and advantageously is 50% or more by weight of the solution.
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