-
1.发明授权公开(公告)号：US06941742B1
公开(公告)日：2005-09-13
申请号：US09568365
申请日：2000-05-10
申请人： Ronald Neufert , Frank Witzel , Stefan Fischer , Günther Pajonk
发明人： Ronald Neufert , Frank Witzel , Stefan Fischer , Günther Pajonk
CPC分类号： F01N3/00 , B01D53/8609 , B01D53/94 , B01D53/9431 , B01D2251/2062 , F01N3/02 , F01N3/2066 , F01N2610/02 , Y02T10/24
摘要： To reduce the number of particles in an exhaust gas (A), in particular in the exhaust gas (A) from an internal-combustion engine, sulfur dioxide SO2 which is contained in the exhaust gas (A) is at least partially catalytically oxidized, in the presence of ammonia NH3 in a catalytic converter system having a catalytic activity which increases in the direction of flow, to form sulfur trioxide SO3. The simultaneous presence of sulfur trioxide SO3 and ammonia NH3 in the exhaust-gas stream which is brought about in this way results in an agglomeration of the small and very small particles and reduction in the number thereof.
摘要翻译： 为了减少废气（A）中的颗粒的数量，特别是在来自内燃机的废气（A）中），排气（A）中所含的二氧化硫SO 2 ）在具有在流动方向上增加的催化活性的催化转化器体系中在氨NH 3存在下至少部分催化氧化以形成三氧化硫SO 3， SUB>。 在这种方式引起的废气流中同时存在三氧化硫SO 3 3和氨NH 3，导致小的和非常小的颗粒的聚集 并减少其数量。
-
公开(公告)号：US06576585B2
公开(公告)日：2003-06-10
申请号：US09822038
申请日：2001-03-29
申请人： Stefan Fischer , Ronald Neufert , Günther Pajonk , Frank Witzel
发明人： Stefan Fischer , Ronald Neufert , Günther Pajonk , Frank Witzel
IPC分类号： B01J2108
CPC分类号： B01D53/9418 , B01D2255/20715 , B01D2255/20723 , B01D2255/20776 , B01D2255/2092 , B01D2255/30 , B01J23/22 , B01J23/30 , B01J37/08
摘要： A process for producing a catalyst body includes providing titanium dioxide, tungsten trioxide, vanadium pentoxide, aluminum oxide, and/or silicon oxide for the catalyst body. A kneadable and/or shapable compound is processed to form a shaped body by extrusion or by coating of a support body. The shaped body is dried and is calcined to form an active compound. The calcined shaped body is artificially aged by a final heat treatment at a temperature higher than the calcination temperature to produce a catalyst body having a high resistance to deactivation at high temperatures. The starting materials include from 65 to 95% by weight of titanium dioxide, 2 to 30% by weight of tungsten trioxide, 0 to 2% by weight of vanadium pentoxide, preferably, less than 1.5%, 0.1 to 10% by weight of aluminum oxide, and 0.1 to 10% by weight of silicon dioxide. The final heat treatment is done is at 660 to 700° C., drying is at 20 to 100° C. prior to calcination, and calcination is at 400° C. to less than 700° C.
摘要翻译： 制备催化剂体的方法包括为催化剂体提供二氧化钛，三氧化钨，五氧化二钒，氧化铝和/或氧化硅。 通过挤出或涂覆支撑体来加工可捏合和/或可成形的化合物以形成成形体。 将成形体干燥并煅烧以形成活性化合物。 煅烧成形体通过在高于煅烧温度的温度下进行最终热处理而被人工老化，以产生在高温下具有高抗失活性的催化剂体。 原料包括65至95重量％的二氧化钛，2至30重量％的三氧化钨，0至2重量％的五氧化二钒，优选小于1.5重量％，0.1至10重量％的铝 氧化物和0.1〜10重量％的二氧化硅。 进行最终的热处理是在660-700℃，在煅烧之前干燥20-100℃，煅烧温度在400℃至小于700℃。
-
公开(公告)号：US06641785B1
公开(公告)日：2003-11-04
申请号：US09640151
申请日：2000-08-16
申请人： Ronald Neufert , Frank Witzel
发明人： Ronald Neufert , Frank Witzel
IPC分类号： B01D5356
CPC分类号： B01D53/9445 , B01D53/944 , B01J23/30 , B01J23/6527 , Y02A50/2324 , Y02T10/22
摘要： The invention relates to a catalytic converter and a method for cleaning the exhaust gas from an internal combustion engine which is operated with excess air. The catalytic converter has an active material made from the oxides TiO2, V2O5, CaO and SiO2, as well as WO3 and/or MoO3. An active material of this type has the property of using the SCR method to reduce to equal extents the levels of nitrogen oxides and hydrocarbons. The CO oxidation activity of a material of this type can be increased by metering in elements selected from the group consisting of Pt, Pd, Rh, Ru and Ir in any desired inorganic form.
摘要翻译： 本发明涉及一种用于从内燃机中清除废气的催化转化器和方法，所述内燃机用过量的空气操作。 催化转化器具有由氧化物TiO 2，V 2 O 5，CaO和SiO 2以及WO 3和/或MoO 3制成的活性材料。 这种类型的活性材料具有使用SCR方法将氮氧化物和碳氢化合物的含量降低到相同程度的性质。 可以通过以任何所需无机形式计量选自Pt，Pd，Rh，Ru和Ir的元素来提高这种材料的CO氧化活性。
-
公开(公告)号：US06596661B2
公开(公告)日：2003-07-22
申请号：US09761811
申请日：2001-01-16
申请人： Ronald Neufert
发明人： Ronald Neufert
IPC分类号： B01J3858
摘要： A process for regenerating a catalyst, in particular a plate-type or honeycomb catalyst, which has been at least partially deactivated by catalyst poisons, is described. The catalyst is treated with a gaseous reducing agent and with a polyfunctional complex-forming agent, so that the catalyst poisons are removed.
摘要翻译： 描述了通过催化剂毒素至少部分失活的催化剂，特别是板式或蜂窝状催化剂的再生方法。 催化剂用气态还原剂和多官能络合物形成剂处理，从而除去催化剂毒物。
-
公开(公告)号：US06216755B1
公开(公告)日：2001-04-17
申请号：US09364897
申请日：1999-08-02
申请人： Ronald Neufert
发明人： Ronald Neufert
IPC分类号： B65B104
CPC分类号： B60K15/04 , B60K15/03 , B60K2015/03348 , B67D7/42 , B67D7/428 , F01N2610/1406 , F01N2610/1413 , F01N2610/1466 , Y10T137/469
摘要： A device for simultaneously filling a container serving as a fuel tank and a container serving as a reducing-agent container with a single pump nozzle is used for environmentally friendly internal combustion engines with exhaust-gas purification systems requiring both tanks which are to be refilled repeatedly. Filler necks of the containers as well as outlet pipes disposed in the pump nozzle and assigned to the filler necks, are combined. A method for filling the containers is also provided.
摘要翻译： 用于同时填充用作燃料箱的容器的装置和用作具有单个泵喷嘴的还原剂容器的容器用于具有废气净化系统的环境友好的内燃机，其需要要重复填充的两个罐 。 容器的填充颈部以及设置在泵喷嘴中并分配给填充颈部的出口管被组合。 还提供了一种用于填充容器的方法。
-
6.发明授权Method and device for introducing liquid into an exhaust-gas purification system 失效将液体引入废气净化系统的方法和装置
公开(公告)号：US5884475A
公开(公告)日：1999-03-23
申请号：US816365
申请日：1997-03-13
申请人： Lothar Hofmann , Ronald Neufert , Wieland Mathes
发明人： Lothar Hofmann , Ronald Neufert , Wieland Mathes
CPC分类号： F01N3/2066 , B01D53/9431 , B01D53/9495 , F23J15/003 , F01N2240/02 , F01N2240/16 , F01N2610/02 , F01N2610/08 , F01N2610/10 , F01N2610/1406 , F01N2610/1486 , F01N2610/1493 , Y02T10/24
摘要： Nitrogen oxides emitted by an internal-combustion engine operated with excess air are normally converted by the method of selective catalytic reduction by bringing the nitrogen oxides, together with ammonia, into contact with a selective catalyst. Due to the dangers associated with the use of ammonia, in a motor vehicle ammonia should only be carried in the form of a substance which liberates ammonia, generally an aqueous urea solution. A method and a device for introducing liquid into an exhaust-gas purification system according to the invention avoids frost damage to sections of the system during shutdown times and permits operation of the system at temperatures below the freezing point of the reducing agent solution being used. The method and device include a (thermally insulated) reservoir for the reducing agent liquid and a liquid supply line which is connected thereto and terminates in an outlet opening for the liquid. The reservoir and the liquid supply line can be heated. Furthermore, a heater is provided for liquefying a starting volume which is small as compared with the volume of the reservoir. The liquid supply line may also have a back-flush valve to which a gas that is under pressure can be applied. The supply line can consequently be blown free.
摘要翻译： 由过量空气运行的内燃机排放的氮氧化物通常通过使氮氧化物与氨与选择性催化剂接触而通过选择性催化还原的方法转化。 由于与使用氨有关的危险，在机动车辆中，氨只应以释放氨（通常为尿素水溶液）的物质的形式运载。 根据本发明的用于将液体引入排气净化系统的方法和装置避免了在关闭时间期间对系统的部分的霜冻损坏，并且允许系统在低于所使用的还原剂溶液的凝固点的温度下操作。 该方法和装置包括用于还原剂液体的（隔热）储存器和连接到其上的终止于液体出口的液体供应管线。 储存器和液体供应管线可以被加热。 此外，提供了一种用于液化与储存器的体积相比小的起始体积的加热器。 液体供应管线还可以具有可以施加压力下的气体的后冲洗阀。 因此，供应线可以自由吹制。
-
公开(公告)号：US06488903B2
公开(公告)日：2002-12-03
申请号：US09725340
申请日：2000-11-29
IPC分类号： C01G3000
CPC分类号： B01D53/945 , B01D53/90 , F01N3/206 , Y02T10/22
摘要： A method for cleaning diesel engine exhaust gas is described. The exhaust gas is passed over a catalytic converter with an active material which contains (% by weight) 70-95% TiO2, 2-10% WO3 and/or MoO3, 0.1-5% V2O5, 0.1-8% CaO, 0.1-8% Al2O3, 0.1-5% B2O3 and 0.1-10% SiO2. A reducing agent for a reduction of nitrogen oxides is metered into the exhaust-gas stream upstream of the catalytic converter.
摘要翻译： 描述了一种用于清洁柴油发动机废气的方法。 废气通过含有（重量％）70-95％TiO 2，2-10％WO 3和/或MoO 3，0.1-5％V 2 O 5，0.1-8％CaO，0.1- 8％Al2O3，0.1-5％B2O3和0.1-10％SiO2。 将用于还原氮氧化物的还原剂计量到催化转化器上游的排气流中。
-
8.发明授权Catalyst for reducing the nitrogen oxide concentration in a flowing medium and method for producing the catalyst 失效用于降低流动介质中的氮氧化物浓度的催化剂及其制造方法
公开(公告)号：US6054408A
公开(公告)日：2000-04-25
申请号：US764712
申请日：1996-12-02
CPC分类号： B01D53/8628 , B01J23/28
摘要： An SCR catalyst containing titanium, molybdenum and vanadium has the particular characteristic that its catalytic activity is significantly less than that of a tungsten-containing catalyst. That disadvantage has been compensated for in the past by using a comparatively large volume of catalyst. In contrast to the conventional practice of using a molybdenum oxide proportion of about 10 to 12% by weight, the invention proposes that the molybdenum proportion of the catalyst, in the form of molybdenum trioxide MoO.sub.3, is about 0.01 to 5% by weight, preferably 1.5 to 4% by weight, relative to the weight of the catalyst mass. A catalyst containing this amount of molybdenum thus has an activity comparable to that of a tungsten-containing catalyst. The invention is applicable to all deNO.sub.x catalytic converters which call for the simultaneous presence of a reducing agent, in particular plate-type and honeycomb-type catalytic converters.
摘要翻译： 含有钛，钼和钒的SCR催化剂具有特别的特征，即其催化活性显着小于含钨催化剂的催化活性。 该缺点已经通过使用较大体积的催化剂得到补偿。 与使用约10至12重量％的氧化钼比例的常规实践相反，本发明提出以三氧化钼MoO 3的形式的催化剂的钼比例为约0.01至5重量％，优选为 相对于催化剂质量的重量为1.5至4重量％。 因此，含有该量的钼的催化剂具有与含钨催化剂相当的活性。 本发明适用于需要同时存在还原剂的所有脱硝催化转化器，特别是板式和蜂窝型催化转化器。
-
9.发明授权
公开(公告)号：US5785937A
公开(公告)日：1998-07-28
申请号：US798517
申请日：1997-02-10
CPC分类号： F01N3/208 , B01D53/30 , B01D53/8696 , B01D53/9431 , B01D53/9495 , F01N2560/06 , F01N2570/18 , F01N2610/02 , F01N2610/146 , F01N2900/08 , F01N2900/1402 , F01N2900/1622 , Y02T10/24
摘要： A method is provided in which the reducing agent, during the starting phase of the internal-combustion engine and during operation with decreasing and, if appropriate, virtually constant exhaust gas temperature, is fed superstoichiometrically in relation to the nitrogen oxide concentration, while taking into account the temperature-dependent storage capacity of a denitration catalytic converter for the reducing agent. The reducing agent is otherwise fed substoichiometrically. In this manner, the catalytic converter is kept at all times at a preferred charge level, so that on one hand it is possible to provide sufficient stored reducing agent for the catalytic conversion and on the other hand it is possible to still have a reducing agent buffer available which avoids slip of the reducing agent. The invention can be used in all internal-combustion engines operated with air excess, such as diesel engines and lean-burn engines.
摘要翻译： 提供了一种方法，其中在内燃机的起动阶段和在运行期间还原剂在减少并且如果适当的情况下基本上恒定的排气温度被加入到超氧化物计量相对于氮氧化物浓度的同时， 考虑了用于还原剂的脱硝催化转化器的温度依赖性储存容量。 还原剂另外以化学计量方式进料。 以这种方式，催化转化器始终保持在优选的装料水平，因此一方面可以提供足够的储存的用于催化转化的还原剂，另一方面可以还有还原剂 缓冲剂可以避免还原剂的滑脱。 本发明可以用于所有使用空气过剩的内燃机，例如柴油发动机和稀燃燃烧发动机。
-
10.发明授权Process for the catalytic removal of polycyclic aromatic nitro, nitroso and/or amino compounds 失效催化除去多环芳基硝基，亚硝基和/或氨基化合物的方法公开(公告)号：US06482376B2
公开(公告)日：2002-11-19
申请号：US09799542
申请日：2001-03-05
申请人： Walter Fischer , Ronald Neufert
发明人： Walter Fischer , Ronald Neufert
IPC分类号： C01G3000
CPC分类号： F01N3/2066 , B01D53/8621 , B01D53/8628 , B01D53/9404 , B01D53/9418 , B01D2251/2067 , B01D2255/20707 , B01J23/28 , B01J23/30 , F01N2610/02 , Y02T10/24
摘要： A process is provided for the catalytic removal of polycyclic aromatic nitro, nitroso and/or amino compounds from the exhaust gas of a combustion system, in particular a diesel engine. The exhaust gas is brought into contact with a catalytic converter which includes a catalytically active material that contains titanium dioxide, at a temperature of from 150 to 600° C. The polycyclic aromatic compounds are oxidized at the catalytic converter through the use of oxygen to form nitrogen oxides, carbon dioxide and water.
摘要翻译： 提供了用于从燃烧系统，特别是柴油发动机的排气中催化除去多环芳基硝基，亚硝基和/或氨基化合物的方法。 废气与催化转化器接触，催化转化器包括在150-600℃的温度下含有二氧化钛的催化活性物质。多环芳族化合物在催化转化器中通过使用氧来形成 氮氧化物，二氧化碳和水。
-
-
-
-
-
-
-
-
-
搜索结果
14 条记录 (耗时 0.025 秒)
