Abstract: A honeycomb body includes at least one housing and a honeycomb structure for a waste-gas purification system having at least one sheet metal material. The sheet metal material has elevations in at least one section and an edge contour enclosing the elevations. A portion of the area of the elevations in the at least one section is at least 80%. A particle separator, a catalyst carrier body and a motor vehicle having the honeycomb body are also provided.

Abstract: An exhaust gas-treating device (1) for an exhaust system of an internal combustion engine, especially of a motor vehicle, which is provided with an insert (3), which has a plurality of ducts (5, 5?), through which parallel flow is possible. The insert has, in an inflow-side, first section (6), an oxidation catalyst coating, which forms an oxidation catalytic converter (K1). The insert comprises on an outflow-side a second section (7) with a particle filter (K3) with inlet ducts (12) closed on the outflow side and with outflow ducts (13) closed on the inflow side after the first section (6). Greater integration of a plurality of catalyst components of the exhaust gas-treating device (1) is possible.

Abstract: A catalytic device and method for forming a catalytic device are described. The devices and methods described can be used for emissions systems in heavy duty diesel engines. In particular, a method of spin forming a catalytic device generally includes disposing a mat about an outer surface of a catalyst substrate and inserting the catalyst substrate and mat inside a shell. The mat is between the shell and the catalyst substrate. The shell, catalyst substrate, and mat can be spin formed into at least a generally elliptical shape but generally other than a circle shape.

Abstract: It is intended to provide an exhaust gas treatment system, which allows for VOC removal at lower temperatures and thereby improves the durability of catalysts and suppresses carbon monoxide generation at the final outlet of the system. The present invention provides a treatment system of an exhaust gas containing a nitrogen oxide, carbon monoxide, and a volatile organic compound comprising: an exhaust gas treatment means for removing the nitrogen oxide by reduction with ammonia and partially oxidizing the VOC to CO; and a CO/VOC removal means for oxidizing the CO and partially unreacted VOC, in this order from the upstream flow of the exhaust gas.

Abstract: A first NOx adsorption material 20 exhibiting a peak temperature being 200° C. or less at which an elimination amount of adsorbed NOx becomes the maximum is put in place on an exhaust-gas upstream side, and a second NOx adsorption material 21 exhibiting a peak temperature surpassing 200° C. at which an elimination amount of adsorbed NOx becomes the maximum is put in place on an exhaust-gas downstream side of the first NOx adsorption material 20. In low-temperature region, NOx are adsorbed on the first NOx adsorption material 20; and, in high-temperature region, NOx having been eliminated from the first NOx adsorption material 21 are adsorbed on the second NOx adsorption material 21 again. Therefore, it is possible to adsorb NOx form low-temperature region and up to high-temperature region efficiently, and thereby an amount of NOx being discharged from an NOx reduction catalyst to be put in place on a downstream-side thereof is reduced.

Abstract: A honeycomb structural body includes a plurality of honeycomb units, first and second electrodes, and first and second conductive members. The plurality of honeycomb units are adhered to each other by interposing an adhesive layer. Each of the plurality of honeycomb units contains a conductive ceramic material. Each of the plurality of honeycomb units includes cell walls extending along a longitudinal direction of each of the plurality of honeycomb units to define a plurality of through-holes. The first and second electrodes are provided on an outer peripheral surface of each of the plurality of honeycomb units. The first and second conductive members are electrically connected to the first and second electrodes, respectively.

Abstract: The invention has its object to provide an exhaust emission control device which can be favorably mounted on a vehicle without causing relative twisting between a particulate filter and a selective reduction catalyst. In the exhaust emission control device in which a particulate filter and a selective reduction catalyst are housed by casings, respectively, and arranged side by side such that inlet ends of the filter and the catalyst are oriented to one and the same direction, an S-shaped communication passage being provided for introduction of the exhaust gas from an outlet end of the filter to an inlet end of the adjacent catalyst through antithetical turnabout, urea water being addible intermediately of the communication passage, the casings for the filter and catalyst are integrally restrained by rigid plates (restraining members).

Abstract: A honeycomb filter includes a plurality of porous partition portions each forming a cell, which is open at one end and closed at the other end and serves as an exhaust gas flow path, and a trapping layer, for trapping and removing solid components contained in the exhaust gas, formed on each of the partition portions. At least part of each of the partition portions is loaded with a catalyst. The amount of catalyst a (g/L) in an upstream partition portion and the amount of catalyst b (g/L) in a downstream partition portion satisfy 1.05?a/b?3.00. A method for, limiting a/b to this range includes the entire honeycomb structure, including the partition portions, into contact with a catalyst component to form a catalyst, and subsequently bringing only an upstream region of the honeycomb structure into contact with a catalyst component to form a catalyst.

Abstract: An hydraulic excavator is provided with an exhaust gas treatment apparatus in an exhaust pipe for effecting the purification treatment of exhaust gas including capturing the particulate matter in the exhaust gas. A space provided for mounting and removing a filter accommodating cylinder (31) is formed between the upstream cylinder (22) and the downstream cylinder (27). In particular, upwardly inclined connecting surfaces (23E and 28E) are provided on flange portions of upstream and downstream cylinders (22 and 27), respectively, and downwardly inclined connecting surfaces (32F and 32G) are provided on upstream side flange portions of filter accommodating cylinder (31). In consequence, a substantially V-shaped insertion space (S) which is gradually enlarged from a lower side to an upper side can be formed between the upstream cylinder (22) and the downstream cylinder (27).

Abstract: A first porous catalytic layer is provided in an exhaust passage, and a second porous catalytic layer is stacked on the exhaust-gas downstream-side surface of the first layer. The first layer includes an iron-zeolite catalyst to decrease 60% or more of NOx in the exhaust gas within an exhaust gas temperature range of 150-400° C. The second layer includes one or more of a single catalyst, a mixed catalyst, and a complex oxide catalyst selected from iron-alumina, iron-zirconia, iron-ceria, and iron-titania, to decrease 60% or more of NOx in the exhaust gas within an exhaust gas temperature range of 400-700° C. The first and second layers cooperatively exhibit catalytic activity to decrease 70% or more of NOx in the exhaust gas within an exhaust gas temperature range of 150 to 700° C.

Abstract: An outlet-side catalytic layer 22 includes a noble metal in a concentration that is a noble-metal concentration in an inlet-side catalytic layer 20 or more, and the inlet-side catalytic layer 20 contains an NOx storage material in a content that is greater than that in the outlet-side catalytic layer 22 in the inlet-side catalytic layer 20, a pore catalytic layer 21 and the outlet-side catalytic layer 22. PM are converted on the inlet side mainly, and NOx are converted on the outlet side mainly. Therefore, the lowering of the noble metal's activities is suppressed, and additionally it is possible to convert PM and NOx efficiently.

Abstract: Provided is a catalyst converter for purifying exhaust gas and a method for manufacturing the catalyst converter, in which a heater is disposed between inner/outer monoliths, to thereby heighten a heat transfer efficiency and induce a uniform catalytic reaction, and to thereby enhance a processing performance, and minimize an electric power consumption and miniaturize a device. The catalyst converter includes: a heater having a winding portion which is wound so as to have a space therein and a pair of electric power terminals; inner and outer monoliths which are inserted in the inner and outer circumferential portions of the heater winding portion wherein each of the inner and outer monoliths includes a number of hollow cells on the surfaces of which catalysts have been coated and which are formed in the lengthy direction; and a housing in which a support assembly is assembled.

Abstract: An arrangement for aftertreatment of exhaust gas for lean-burn internal combustion engines such as diesel engines and Otto engines with direct injection includes a catalyzer for oxidation of nitrogen monoxide and a molecular sieve which keeps sulfur dioxide away from the catalyzer arranged upstream of the catalyzer.

Abstract: A plurality of catalytic units (42) and (43) are disposed in series with each other in a direction conforming to the direction (X) of flow of the exhaust gases (G) and include respective honeycomb carrier structure each having a catalyst deposited thereon. Of the plural catalytic units, at least two catalytic units (42) and (43), which are positioned downstream and upstream relative to each other with respect to the direction (X) of flow of the exhaust gases (G), respectively, are such that the downstream catalytic unit (42) has a higher cell density, a smaller capacity of the honeycomb carrier structure and a larger amount of an element, due to become a major catalyst, carried thereby per unitary capacity than those in the upstream catalytic unit (43).

Abstract: An arrangement and method for reducing the nitrogen oxide content in the exhaust gas of an internal combustion engine with the aid of ammonia and/or ammonia-releasing reduction agents, whereby ammonia and/or ammonia-containing reduction agent is added to the exhaust gas stream upstream of a catalyst combination composed of an SCR catalyst and a subsequent NH3-oxidation catalyst in such a way that a homogeneous mixture of exhaust gas and ammonia is present upstream of the SCR catalyst. To optimize the reaction or conversion of nitrogen oxides, disposed downstream of the combination of a first SCR catalyst and a first NH3-oxidation catalyst is at least one second catalyst having SCR activity in order in this way to reduce the nitrogen oxides formed at the first NH3-oxidation catalyst due to insufficient selectivity of the catalyst to nitrogen with not yet oxidized NH3.

Abstract: An SCR system includes at least one reducing agent tank, a filter, a feed device and a reducing agent line for feeding and conducting a reducing agent. At least one compensation element has a volume through which the reducing agent flows and is suitable for varying the volume as a function of a reducing agent pressure. A motor vehicle having an SCR system is also provided.

Abstract: An apparatus comprises a particulate filter substrate for an internal combustion engine, the filter substrate is coated at least in part with a washcoat, and the washcoat comprises a relatively high density material having a density of at least 3.50 gcm?3.

Abstract: An exhaust gas purification apparatus in which layout restriction is lessened to be able to further achieve space-saving is proposed. The exhaust gas purification apparatus includes a first cylindrical housing in which an oxidation catalytic converter and a PM collection filter are contained and a second cylindrical housing in which a reducing catalytic converter and an ammonia oxidation catalytic converter are contained. The exhaust gas purification apparatus further includes a communicating pipe that connects between far end portions of both the housings, and a nozzle that is disposed in the communicating pipe and injects liquid reducing agent in exhaust gas. The two housings are closely disposed such that axis lines thereof are arranged substantially parallel. The communicating pipe is disposed such that an axis line thereof is arranged substantially parallel with the axis lines of the housings.

Abstract: A holding material for a catalytic converter including a catalyst carrier having an elliptical cross section, a metal casing for receiving the catalyst carrier, and the holding material mounted on the catalyst carrier and interposed in a gap between the catalyst carrier and the metal casing, in which the holding material has a first portion and a second portion, and the first portion in contact with a region of the catalyst carrier, corresponding to 40 to 95% of a major axis centering on an intersection of an ellipse and a minor axis in the elliptical cross section of the catalyst carrier, is larger than the second portion in contact with any other region of the catalyst carrier in basis weight.

Abstract: A system for reducing a carbon compound of a heat engine includes: an outlet pipe transferring and outputting an exhaust gas from the heat engine; a removal reacting tank connected to the outlet pipe, the removal reacting tank generating a strong alkaline solution by a reaction of a resource material and a water and removing the carbon compound from the exhaust gas by a contact of the carbon compound and the strong alkaline solution; a sludge storing tank storing a sludge generated by a removal reaction in the removal reacting tank; and a decomposing tank generating the resource material for the removal reacting tank by decomposing the sludge from the sludge storing tank with a heat. Accordingly, since the carbon compound such as carbon dioxide is effectively removed from the exhaust gas emitted from a heat engine equipped in an industrial plant and a vehicle, atmospheric environmental pollution is prevented and regulation on carbon dioxide emission is satisfied.