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1. 发明申请

WO1997028358A1 METHOD AND APPARATUS FOR REDUCING HARMFUL EMISSIONS FROM A DIESEL ENGINE BY POST COMBUSTION CATALYST INJECTION 审中-公开
标题翻译：通过后燃烧催化剂注射从柴油发动机减少有害排放物的方法和装置
公开(公告)号：WO1997028358A1
公开(公告)日：1997-08-07
申请号：PCT/US1997001606
申请日：1997-01-30
申请人： CLEAN DIESEL TECHNOLOGIES, INC. , PETER-HOBLYN, Jeremy, D. , VALENTINE, James, M. , SPRAGUE, Barry, N.
发明人： CLEAN DIESEL TECHNOLOGIES, INC. , PETER-HOBLYN, Jeremy, D.
IPC分类号： F01N03/28
CPC分类号： C10L1/1828 , B01D53/944 , B01D53/9495 , C10L1/10 , C10L1/1208 , C10L1/1225 , C10L1/1233 , C10L1/1241 , C10L1/1266 , C10L1/1275 , C10L1/1616 , C10L1/1814 , C10L1/188 , C10L1/1881 , C10L1/1886 , C10L1/1888 , C10L1/205 , C10L1/231 , C10L1/2437 , C10L1/2641 , C10L1/301 , C10L1/305 , C10L10/02 , F01N3/023 , F01N3/029 , F01N3/035 , F01N3/206 , F01N2430/04 , F01N2610/01 , F02D19/12 , Y02A50/2341 , Y02T10/121
摘要： Emissions of pollutants from diesel engines (10) are reduced by a regimen for catalytically treating engine exhaust and, preferably, also the combustion of the fuel. The balance point of a diesel trap (30) is reduced to permit more efficient regeneration, preferably self-regeneration, while also reducing emissions of carbon monoxide and hydrocarbons by a combination of mechanical devices and fuel additives. The regimen requires the introduction of from 0.05 to 1 ppm of a platinum group metal catalyst (based on the volume of fuel combusted) into the particulates, by introducing at least half of the platinum group metal catalyst (50) directly into the hot exhaust gases (52, 20). Preferably, the platinum group metal catalyst is employed with a combustible organic liquid to aid in either progressively loading the trap (30) with the combustible organics or to combust in the hot combustion gases to facilitate burning of the particulates on the trap (30) for more effective regeneration. The judicious selection and use of an auxiliary catalyst metal (e.g., copper), preferably adding at least half of its total to the fuel as a fuel additive, is a preferred part of the regimen to achieve the lowest trap balance point.
摘要翻译：来自柴油发动机（10）的污染物的排放通过用于催化处理发动机排气的方案减少，并且优选地还被燃料的燃烧。柴油收集器（30）的平衡点被减少以允许更有效的再生，优选自再生，同时还通过机械装置和燃料添加剂的组合减少一氧化碳和烃的排放。该方案需要将0.05至1ppm的铂族金属催化剂（基于燃烧的燃料的体积）引入颗粒中，通过将至少一半的铂族金属催化剂（50）直接引入热废气中（52,20）。优选地，将铂族金属催化剂与可燃有机液体一起使用以帮助将捕集器（30）逐渐加载到可燃的有机物上，或者在热燃烧气体中燃烧，以便于将微粒燃烧在捕集器（30）上更有效的再生。辅助催化剂金属（例如铜）的合理选择和使用，优选将其总量的至少一半添加到作为燃料添加剂的燃料中，是实现最低陷阱平衡点的方案的优选部分。

2. 发明申请

WO1997036676A1 METHOD AND APPARATUS FOR REDUCING HARMFUL EMISSIONS FROM A DIESEL ENGINE BY UREA INJECTION SCR 审中-公开
标题翻译：用于通过尿素注射SCR减少柴油发动机的有害排放的方法和装置
公开(公告)号：WO1997036676A1
公开(公告)日：1997-10-09
申请号：PCT/US1997005468
申请日：1997-04-02
申请人： CLEAN DIESEL TECHNOLOGIES, INC. , PETER-HOBLYN, Jeremy, D. , VALENTINE, James, M. , SPRAGUE, Barry, N.
发明人： CLEAN DIESEL TECHNOLOGIES, INC.
IPC分类号： B01J08/00
CPC分类号： C01C1/086 , B01D53/9431 , B01D53/9495 , B01D2251/2067 , F01N3/2066 , F01N2240/25 , F01N2240/40 , F01N2610/02 , F01N2610/08 , F01N2610/10 , F02B37/00 , Y02T10/144 , Y02T10/24
摘要： Emission of NOx from diesel engines is reduced by hydrolyzing or otherwise gasifying urea on an as-needed basis. Preferably, an aqueous urea solution is introduced into a catalyzed chamber (60) maintained at least partially in contact with the exhaust system (12). The heat of the exhaust gases is utilized to gasify the urea. The gaseous breakdown products of the urea are then introduced into the exhaust gases upstream of an SCR catalyst. In one form of the invention, an oxidation catalyst (22) is provided down stream of the SCR catalyst (20) for the purpose of eliminating any ammonia which might otherwise pass through the system and provide an objectionable odor.
摘要翻译：通过根据需要水解或气化尿素来减少来自柴油发动机的NOx的排放。优选地，将尿素水溶液引入保持至少部分地与排气系统（12）接触的催化室（60）中。排气的热量用于气化尿素。然后将尿素的气态分解产物引入SCR催化剂上游的排气中。在本发明的一种形式中，在SCR催化剂（20）的下游设置氧化催化剂（22），以消除否则可能通过该系统并提供令人不快的气味的任何氨。

3. 发明申请

WO1997009523A1 METHODS FOR IMPROVING THE OPERATION OF A CATALYZED ENGINE 审中-公开
标题翻译：改进催化发动机运行的方法
公开(公告)号：WO1997009523A1
公开(公告)日：1997-03-13
申请号：PCT/US1996014079
申请日：1996-08-29
申请人： CLEAN DIESEL TECHNOLOGIES, INC. , VALENTINE, James, M. , PETER-HOBLYN, Jeremy, D. , SPRAGUE, Barry, N.
发明人： CLEAN DIESEL TECHNOLOGIES, INC.
IPC分类号： F02B51/02
CPC分类号： F02B77/02 , F02B3/06 , F02B51/02 , F05C2201/0427 , Y02T10/126
摘要： The activity of catalytic engines is maintained over time, preferably while reducing emissions of pollutants. Platinum group catalysts deposit on the internal surfaces of the cylinder which make up the combustion chamber. In one embodiment, wherein the engines are equipped with particulate traps, through the use of mechanical modifications such as exhaust gas recirculation and engine timing modification, it is possible to reduce the emissions of NOx by significant amounts. In another embodiment, a multi-metal catalyst composition, comprising a combination of a platinum metal catalyst composition and at least one auxiliary catalyst metal, is added to the cylinder (as part of the fuel, separate injection, lubricating oil, or the combustion air) prior to combustion to provide catalyst metal to the cylinder and the exhaust system including a diesel trap to lower the balance point of the particulate trap (the temperature at which the rate of trap loading equals the rate of regeneration), while achieving the advantages of catalyst activity maintenance and preferably also lowering the emissions of carbon monoxide and unburned hydrocarbons.
摘要翻译：催化发动机的活性在一段时间内得到保持，最好在减少污染物排放的同时。铂族催化剂沉积在构成燃烧室的气缸的内表面上。在一个实施例中，其中发动机配备有颗粒捕集器，通过使用诸如废气再循环和发动机正时修改的机械修改，可以显着量地减少NOx的排放。在另一个实施方案中，将包含铂金属催化剂组合物和至少一种辅助催化剂金属的组合的多金属催化剂组合物加入到气缸中（作为燃料的一部分，分离的注入，润滑油或燃烧空气），以提供催化剂金属到气缸和排气系统，其包括柴油收集器以降低颗粒捕集器的平衡点（捕集装载速率等于再生速率的温度），同时实现以下优点：催化剂活性维持，并优选还降低一氧化碳和未燃碳氢化合物的排放。

4. 发明申请

WO1997004045A1 METHODS FOR REDUCING HARMFUL EMISSIONS FROM A DIESEL ENGINE 审中-公开
标题翻译：减少柴油发动机有害排放的方法
公开(公告)号：WO1997004045A1
公开(公告)日：1997-02-06
申请号：PCT/US1996011908
申请日：1996-07-18
申请人： CLEAN DIESEL TECHNOLOGIES, INC. , PETER-HOBLYN, Jeremy, D. , VALENTINE, James, M. , SPRAGUE, Barry, N. , EPPERLY, W., Robert
发明人： CLEAN DIESEL TECHNOLOGIES, INC.
IPC分类号： C10L01/30
CPC分类号： F01N3/029 , C10L1/10 , C10L1/1208 , C10L1/1225 , C10L1/1233 , C10L1/1241 , C10L1/125 , C10L1/1266 , C10L1/1275 , C10L1/14 , C10L1/1608 , C10L1/1616 , C10L1/1691 , C10L1/1814 , C10L1/1824 , C10L1/1828 , C10L1/1852 , C10L1/1855 , C10L1/1857 , C10L1/188 , C10L1/1881 , C10L1/1883 , C10L1/1886 , C10L1/1888 , C10L1/191 , C10L1/198 , C10L1/1985 , C10L1/2222 , C10L1/2225 , C10L1/224 , C10L1/23 , C10L1/231 , C10L1/232 , C10L1/238 , C10L1/2437 , C10L1/26 , C10L1/2608 , C10L1/301 , C10L1/305 , C10L10/02 , C10L10/06 , F01N3/023 , F01N3/035 , F01N2430/04 , F02D41/0065 , F05C2201/0427
摘要： Emissions of pollutants from diesel engines are reduced by a combination of mechanical devices and fuel additives. In one series of embodiments, diesel emissions of NOx and particulates are reduced, simultaneously with gaseous hydrocarbons and carbon monoxide, by the combined use of exhaust gas recirculation or engine timing modification, with a particulate trap and a platinum group metal catalyst composition. In another embodiment, a multi-metal catalyst composition, comprising a combination of a platinum metal catalyst composition and at least one auxiliary catalyst metal composition, especially cerium or copper, is employed to provide catalyst metal to the exhaust system including a diesel trap to lower the balance point of the particulate trap (the temperature at which the rate of trap loading equals the rate of regeneration) while also lowering the emissions of carbon monoxide and unburned hydrocarbons. Data for platinum, copper and cerium catalysts establishes effective amounts. Tests also show selective maintenance of low oxidation of SO2 to SO3.
摘要翻译：通过机械装置和燃料添加剂的组合来减少来自柴油发动机的污染物的排放。在一系列实施例中，通过与颗粒捕集器和铂族金属催化剂组合物的组合使用废气再循环或发动机正时修改，与气态烃和一氧化碳同时地减少了NOx和颗粒的柴油排放。在另一个实施方案中，使用包含铂金属催化剂组合物和至少一种辅助催化剂金属组合物，特别是铈或铜的组合的多金属催化剂组合物，以向排气系统提供催化剂金属，所述催化剂金属包括柴油收集器以降低颗粒捕集器的平衡点（捕集装载速率等于再生速率的温度）同时也降低了一氧化碳和未燃碳氢化合物的排放。铂，铜和铈催化剂的数据建立有效量。测试还显示选择性维持SO2的低氧化为SO3。

5. 发明申请

WO1998028070A1 METHOD AND APPARATUS FOR REDUCING HARMFUL EMISSIONS FROM A LEAN-BURN ENGINE BY UREA INJECTION SCR 审中-公开
标题翻译：用于通过尿素注射SCR将降低发动机的有害排放物减少的方法和装置
公开(公告)号：WO1998028070A1
公开(公告)日：1998-07-02
申请号：PCT/US1997023796
申请日：1997-12-22
申请人： CLEAN DIESEL TECHNOLOGIES, INC. , PETER-HOBLYN, Jeremy, D. , BALLES, Eric , HOFMANN, John, E.
发明人： CLEAN DIESEL TECHNOLOGIES, INC.
IPC分类号： B01J08/00
CPC分类号： F01N3/2066 , B01D53/9431 , B01D53/9495 , B01D2251/2067 , B01F3/04049 , B01F5/0065 , B01F5/061 , F01N2240/40 , F01N2610/02 , F01N2610/10 , F01N2610/1453 , Y02T10/24
摘要： Emission of NOx from lean-burn (e.g. diesel) engines is reduced by rapidly vaporizing urea or equivalent upon injection into exhaust gases on an as-needed basis. Preferably, a heated and pressurized aqueous urea solution (at least partially hydrolyzed) is injected into the exhaust gases such that, with the rapid release of energy, the solution is rapidly converted from liquid to gaseous form. The gaseous breakdown products of the urea are then introduced with the exhaust gases into an SCR catalyst (30). Injectors (60) of the pintle type are preferred. Preferably a plurality of injectors (50) are operated to inject the solution and are positioned in radial, skewed or longitudinally-spaced orientation on the exhaust pipe (20). The heat can be supplied by heat exchange with the exhaust and/or by an auxillary means (56).
摘要翻译：根据需要，通过在将废气注入废气中迅速汽化尿素或等效物来减少来自贫燃（例如柴油）发动机的NOx的排放。优选地，将加热和加压的尿素水溶液（至少部分水解）注入废气中，使得随着能量的快速释放，溶液迅速地从液体转变成气态。然后将尿素的气态分解产物与废气一起引入SCR催化剂（30）。枢轴类型的注射器（60）是优选的。优选地，操作多个喷射器（50）以注射溶液并且在排气管（20）上以径向，倾斜或纵向间隔的方向定位。可以通过与废气和/或辅助装置（56）的热交换来提供热量。

6. 发明申请

WO1998022209A1 SELECTIVE CATALYTIC NOx REDUCTION UTILIZING UREA WITHOUT CATALYST FOULING 审中-公开
标题翻译：选择性催化氧化还原使用不含催化剂的尿素
公开(公告)号：WO1998022209A1
公开(公告)日：1998-05-28
申请号：PCT/US1997021107
申请日：1997-11-20
申请人： CLEAN DIESEL TECHNOLOGIES, INC. , PETER-HOBLYN, Jeremy, D.
发明人： CLEAN DIESEL TECHNOLOGIES, INC.
IPC分类号： B01J08/00
CPC分类号： F01N3/2066 , B01D53/8631 , F01N2610/02 , Y02T10/24
摘要： Urea is used to reduce NOx in an SCR process with no risk of catalyst fouling. The urea is introduced from tank (128), through line (132) into the combustion gases as an aqueous urea solution at a location in the exhaust manifold/passage (120) where the combustion gases exhibit a temperature of from 250 DEG to 1200 DEG F. Following the introduction of the aqueous solution of urea, the combustion gases in the exhaust manifold/passage (120) are directed through a foraminous structure (124) that traps any water or urea that have not been gasified. Then, the combustion gases are directed through an NOx-reducing catalyst structure (126).
摘要翻译：尿素用于在SCR过程中还原NOx，没有催化剂污染的风险。尿素通过管线（132）从罐128引入作为尿素水溶液的燃烧气体，在排气歧管/通道（120）中的燃烧气体的温度为250-1200℃。在引入尿素水溶液之后，排气歧管/通道（120）中的燃烧气体被引导通过多孔结构（124），其捕获未被气化的任何水或尿素。然后，燃烧气体被引导通过NOx还原催化剂结构（126）。

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