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1. 发明授权

US07640730B2 Catalyst system for the reduction of NOx and NH3 emissions 有权
标题翻译：用于减少NOx和NH3排放的催化剂体系
公开(公告)号：US07640730B2
公开(公告)日：2010-01-05
申请号：US11684240
申请日：2007-03-09
申请人： Haren S. Gandhi , John Vito Cavataio , Robert Henry Hammerle , Yisun Cheng
发明人： Haren S. Gandhi , John Vito Cavataio , Robert Henry Hammerle , Yisun Cheng
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 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。

2. 发明授权

US07332135B2 Catalyst system for the reduction of NOx and NH3 emissions 有权
标题翻译：用于减少NOx和NH3排放的催化剂体系
公开(公告)号：US07332135B2
公开(公告)日：2008-02-19
申请号：US10065470
申请日：2002-10-22
申请人： Haren S Gandhi , John Vito Cavataio , Robert Henry Hammerle , Yisun Cheng
发明人： Haren S Gandhi , John Vito Cavataio , Robert Henry Hammerle , Yisun Cheng
IPC分类号： B01D50/00 , 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 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催化剂制剂置于贫NOx捕集器下游来增强净NOx转化率。通过这样做，NH 3 -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NH 3 -SCR催化剂组合，该系统允许减少或消除NH 3和NO x滑脱，NOx尖峰的减少，因此，在精益和丰富的运营期间改善净NOx转化率。

3. 发明授权

US5376344A Three-way catalyst for automotive emission control 失效
标题翻译：用于汽车排放控制的三元催化剂
公开(公告)号：US5376344A
公开(公告)日：1994-12-27
申请号：US649409
申请日：1991-01-28
申请人： Mohinder S. Chattha , William L. H. Watkins , Haren S. Gandhi
发明人： Mohinder S. Chattha , William L. H. Watkins , Haren S. Gandhi
IPC分类号： F01N3/28 , B01D53/94 , B01J23/44 , B01J23/56 , B01J23/63 , B01J23/89 , B01J35/04 , B01J37/02 , B01J21/06 , B01D53/46
CPC分类号： B01D53/945 , B01J23/44 , B01J37/024 , Y02T10/22
摘要： A three-way catalyst for automotive emission control having a mechanical carrier having a support comprised substantially of alumina, a catalytic compound supported on said carrier having a major constituent of palladium, and a discontinuous phase of titanium oxide on or adjacent substantially each exposed particle of the catalytic compound. A method of making a three-way catalyst for automotive emission control, comprising: impregnating with palladium a mechanical carrier having a support comprised substantially of alumina to produce a composite having 0.05-5.0% palladium; and impregnating the composite with an organo-titanium compound and decomposing such impregnated compound to form a discontinuous titanium oxide phase on or adjacent the exposed portions of said composite.
摘要翻译：一种用于汽车排放控制的三元催化剂，其具有机械载体，其具有基本上由氧化铝组成的载体，负载在所述载体上的催化化合物具有钯的主要成分，以及基本上每个暴露的催化剂。一种制备用于汽车排放控制的三元催化剂的方法，包括：用钯浸渍具有基本上由氧化铝组成的载体的机械载体，以制备具有0.05-5.0％钯的复合物; 并用有机钛化合物浸渍复合物并分解这种浸渍的化合物以在所述复合材料的暴露部分上或其附近形成不连续的氧化钛相。

4. 发明授权

US5155077A Catalyst for purification of lean-burn engine exhaust gas 失效
标题翻译：用于净化稀燃燃烧发动机废气的催化剂
公开(公告)号：US5155077A
公开(公告)日：1992-10-13
申请号：US753780
申请日：1991-09-03
申请人： Clifford Montreuil , Haren S. Gandhi , Mohinder S. Chattha
发明人： Clifford Montreuil , Haren S. Gandhi , Mohinder S. Chattha
IPC分类号： B01D53/86 , B01D53/94 , B01J29/072 , B01J29/10
CPC分类号： B01D53/945 , B01J29/072 , Y02T10/22
摘要： A dual-phase zeolite having a transition metal-containing zeolite phase and a transition metal-containing oxide phase. The catalytic material may be an intimate mixture of a phase-layered structure of a first phase constituted preferably of a copper-containing high silica zeolite and a second phase constituted of copper-containing zirconia.Methods are also disclosed for making a single-stage catalyst for removing NO.sub.x and HC at high efficiency in an oxygen-rich automotive exhaust gas, and for treating the exhaust gas with the dual-phase catalyst above.
摘要翻译：具有含过渡金属的沸石相和含过渡金属的氧化物相的双相沸石。催化材料可以是优选由含铜高硅石沸石构成的第一相的相层结构和由含铜氧化锆构成的第二相的紧密混合物。还公开了制造用于富氧汽车废气中高效除去NOx和HC的单级催化剂，以及用上述双相催化剂处理废气的方法。

5. 发明授权

US4916898A Method for treatment of exhaust gases 失效
标题翻译：废气处理方法
公开(公告)号：US4916898A
公开(公告)日：1990-04-17
申请号：US715691
申请日：1985-03-25
申请人： Haren S. Gandhi , Joseph T. Kummer
发明人： Haren S. Gandhi , Joseph T. Kummer
IPC分类号： F01N3/20 , F01N3/30 , F02B1/04
CPC分类号： F01N3/20 , F01N3/30 , F02B1/04 , Y02T10/20
摘要： This specification teaches a method for treatment of exhaust gases which if left untreated can generate, upon full oxidation, temperatures in a range of from about 1600.degree. F. to about 2700.degree. F. over an oxidizing catalyst. The method has the following steps. An internal combustion engine (10) is operated under conditions in which there is insufficient oxygen to oxide all the hydrocarbon present in the fuel. The exhaust gases so-developed are passed into an exhaust manifold (12) and then through an exhaust pipe (14) to an oxidation catalyst (16) whose primary oxidation catalyst is palladium. An air pump (20) generates a supply of oxygen which can supply up to about 80% of the oxygen required to combust fully all of the hydrocarbons and carbon monoxide contained in the exhaust gases when the internal combustion engine is operating in a wide-open throttle condition. A portion of the generated oxygen supply is directed by means of an air line (24) into the exhaust manifold where the oxygen oxidizes any of the hydrocarbons and oxidizes a portion of the carbon monoxide. A remaining portion of the generated oxygen supply is directed by an air line (26) into the exhaust gases in the exhaust pipe just prior to passing over the oxidation catalyst. When the internal combustion engine is operated at wide-open throttle conditions, all but a small amount of the carbon monoxide in the exhaust gases is fully oxidized and all of the oxides of nitrogen are reduced to nitrogen at a time when the internal combustion engine is producing a very large amount of oxides of nitrogen.
摘要翻译：该说明书教导了一种处理废气的方法，如果不经处理，则在氧化催化剂上完全氧化后可产生约1600°F至约2700°F范围内的温度。该方法具有以下步骤。内燃机（10）在氧气不足以氧化存在于燃料中的所有烃的条件下运行。如此显影的废气通入排气歧管（12），然后通过排气管（14）进入氧化催化剂（16），其主要氧化催化剂是钯。空气泵（20）产生氧气供应，当内燃机工作在大开口时，可以提供高达燃烧废气中所含的所有烃和一氧化碳所需氧气的约80％节气门条件。产生的氧气供应的一部分通过空气管线（24）引导到排气歧管中，其中氧氧化任何烃并氧化一部分一氧化碳。所产生的氧供应的剩余部分恰好在通过氧化催化剂之前由空气管线（26）引导到排气管中的废气中。当内燃机在宽开启节气门条件下操作时，除了少量的一氧化碳之外，废气中的一氧化碳完全被氧化，并且在内燃机是产生非常大量的氮氧化物。

6. 发明授权

US4508691A Method for treating exhaust gases with an improved catalyst composition 失效
标题翻译：用改进的催化剂组合物处理废气的方法
公开(公告)号：US4508691A
公开(公告)日：1985-04-02
申请号：US408546
申请日：1982-08-16
申请人： Karen M. Adams , Haren S. Gandhi
发明人： Karen M. Adams , Haren S. Gandhi
IPC分类号： B01D53/94 , B01J23/652 , B01D53/36
CPC分类号： B01D53/945 , B01J23/6527 , Y02T10/22
摘要： There is disclosed a method of using an exhaust gas catalyst for treatment of exhaust gases developed by burning a hydrocarbon fuel or a fuel containing hydrocarbon and alcohol blends in an internal combustion engine. These exhaust gases contain varying amounts of unburned hydrocarbons, carbon monoxide and oxides of nitrogen depending upon the operating conditions of an internal combustion engine. This specification teaches a method of using an improved catalyst composition in which a support medium is provided for supporting the catalyst system. This support medium has deposited thereon palladium and finely divided tungsten. Tungsten is present on the support media in a quantity such that tungsten is available to substantially all of the palladium on the support medium. In this manner, the palladium/tungsten combination is effective in the catalytic oxidation of unburned hydrocarbons and carbon monoxide and the catalytic reduction of oxides of nitrogen without production of significant amounts of ammonia when the internal combustion engine is operating under fuel rich conditions.
摘要翻译：公开了一种使用废气催化剂来处理通过在内燃机中燃烧烃燃料或含有烃和醇共混物的燃料而产生的废气的方法。这些废气根据内燃机的运行条件，含有不同量的未燃碳氢化合物，一氧化碳和氮氧化物。本说明书教导了使用改进的催化剂组合物的方法，其中提供支撑介质以支撑催化剂体系。该载体介质上沉积有钯和细分散的钨。钨在载体介质上的存在量使得钨可用于载体介质上的基本上所有的钯。以这种方式，当内燃机在富燃料条件下运行时，钯/钨组合对未燃烧的烃和一氧化碳的催化氧化和氮氧化物的催化还原是有效的，而不产生大量的氨。

7. 发明授权

US4233189A Catalyst of rhodium on zirconia 失效
标题翻译：铑在氧化锆上的催化剂
公开(公告)号：US4233189A
公开(公告)日：1980-11-11
申请号：US19816
申请日：1979-03-12
申请人： Haren S. Gandhi , Joseph T. Kummer , Mordecai Shelef , Henryk K. Stepien , Hsien C. Yao
发明人： Haren S. Gandhi , Joseph T. Kummer , Mordecai Shelef , Henryk K. Stepien , Hsien C. Yao
IPC分类号： B01D53/94 , B01J23/46 , B01J37/02 , B01J21/06
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。

8. 发明申请

US20110005200A1 Catalyst System for the Reduction of NOx and NH3 Emissions 审中-公开
标题翻译：用于减少NOx和NH3排放的催化剂体系
公开(公告)号：US20110005200A1
公开(公告)日：2011-01-13
申请号：US12877901
申请日：2010-09-08
申请人： Haren S. GANDHI , John Vito CAVATAIO , Robert Henry HAMMERLE , Yisun CHENG
发明人： Haren S. GANDHI , John Vito CAVATAIO , Robert Henry HAMMERLE , Yisun CHENG
IPC分类号： F01N3/00 , B01D53/94 , B01D53/56
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。

9. 发明申请

US20100209326A1 PEROVSKITE CATALYST SYSTEM FOR LEAN BURN ENGINES 审中-公开
标题翻译：用于LEAN BURN发动机的PEROVSKITE催化剂系统
公开(公告)号：US20100209326A1
公开(公告)日：2010-08-19
申请号：US12771903
申请日：2010-04-30
申请人： Haren S. Gandhi , Jun (John) Li , Ronald Gene Hurley
发明人： Haren S. Gandhi , Jun (John) Li , Ronald Gene Hurley
IPC分类号： B01D53/56 , C01F17/00
CPC分类号： C01G55/002 , B01D53/9418 , B01D53/945 , B01D2255/1021 , B01D2255/1025 , B01D2255/2022 , B01D2255/2042 , B01D2255/2047 , B01D2255/20738 , B01D2255/20746 , B01D2255/20761 , B01D2255/402 , B01J23/002 , B01J23/63 , B01J23/8946 , B01J37/03 , B01J2523/00 , C01G49/009 , C01G51/006 , C01G51/68 , C01P2002/34 , C01P2002/52 , C01P2002/77 , C01P2006/12 , Y02T10/22 , Y02T10/24 , B01J2523/25 , B01J2523/3706 , B01J2523/822 , B01J2523/845 , B01J2523/828 , B01J2523/842
摘要： A catalyst system for use with an internal combustion engine to provide emissions reductions under lean and stoichiometric operating conditions. The catalyst system comprises a first catalyst comprised of a newly developed Perovskite-based formulation having an ABO3 crystal structure designed to bring the precious metal and NOx trapping elements close together. The first catalyst acts primarily to maximize the reduction of emissions under lean operating conditions. The catalyst system also comprises a second catalyst comprised of precious metals which acts primarily to maximize the reduction of emissions under stoichiometric conditions.
摘要翻译：一种与内燃机一起使用以在精益和化学计量运行条件下提供减排的催化剂系统。该催化剂体系包括由新开发的基于钙钛矿的制剂组成的第一催化剂，其具有设计成使贵金属和NOx捕获元素靠近在一起的ABO 3晶体结构。第一种催化剂主要用于在精益运行条件下最大限度地减少排放。催化剂体系还包括由贵金属组成的第二催化剂，其主要用于在化学计量条件下最大限度地减少排放。

10. 发明申请

US20090149318A1 Catalyst System for the Reduction of NOx and NH3 Emissions 有权
标题翻译：用于减少NOx和NH3排放的催化剂体系
公开(公告)号：US20090149318A1
公开(公告)日：2009-06-11
申请号：US12325787
申请日：2008-12-01
申请人： Haren S. GANDHI , John Vito CAVATAIO , Robert Henry HAMMERLE , Yisun CHENG
发明人： Haren S. GANDHI , John Vito CAVATAIO , Robert Henry HAMMERLE , Yisun CHENG
IPC分类号： B01J29/064
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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