Abstract: A catalytic article having a flow-through substrate having an inlet, an outlet, and an axial length; an SCR zone containing a first SCR catalyst; and an oxidation zone containing (a) an ASC zone and a DOC zone or (b) a mixed ASC and DOC zone, where the oxidation zone contains an ammonia oxidation catalyst and a DOC catalyst, the SCR zone is positioned on the substrate from the inlet end and extends less than the axial length of the substrate from the inlet, the DOC zone or the mixed ASC and DOC zone is position on the substrate from the outlet end, and when the DOC zone is present, the ASC zone is located between the SCR zone and the DOC zone. In other catalytic articles, the ASC zone further comprises a DEC catalyst. Methods of using the catalytic articles in an SCR process, where the amount of ammonia slip is reduced, are also described.

Abstract: The invention relates to a device and a method for separating dirt particles from the working medium of a turbine (10). The turbine (10) comprises at least one rotor (11) which is arranged in a housing (17). A swirl generator (20) is provided that sets the working medium and the dirt particles in a spiral-shaped rotational movement along a principal axis (22) by means of the geometry of the swirl generator (20) and thereby separates the dirt particles from the working medium. The swirl generator (20) is designed in such a way that the working medium experiences a reversal of the speed component parallel to the principal axis (22) within the swirl generator (20).

Abstract: A honeycomb structure includes: a honeycomb structure body including a plurality of cells defined by a partition wall and serving as a through channel of fluid; and a plugging portion to alternately plug open end parts of the plurality of cells on one side as an inflow side of the exhaust gas and open end parts on the other side as an outflow side of the exhaust gas. The partition wall is loaded, on the side of the outflow cells, with an oxidation catalyst made of a transition metal oxide at least including Fe and Mn to oxidize NO gas or an oxidation catalyst made of a transition metal oxide loaded at CeO2 and at least including Fe and Mn to oxidize NO gas. The loading amount of the oxidation catalyst is 5.0 g/L or more and 50 g/L or less.

Abstract: Catalyst articles having a first zone containing a first SCR catalyst and a second zone containing an ammonia slip catalyst (ASC), where the ammonia slip catalyst contains a second SCR catalyst and an oxidation catalyst, and the ASC has DOC functionality, where the first zone is located on the inlet side of the substrate and the second zone is located in the outlet side of the substrate are disclosed. The catalytic articles are useful for selective catalytic reduction (SCR) of NOx in exhaust gases, in reducing the amount of ammonia slip and in oxidizing organic residues. Exhaust systems containing the catalyst articles and methods of using the catalytic articles in an SCR process, where the amount of ammonia slip is reduced and hydrocarbon are oxidized by the ASC catalyst, are also described.

Abstract: A catalytic converter apparatus for use in an exhaust system of an internal combustion engine includes a housing having a gas inlet and a gas outlet, and at least one catalytic substrate element disposed in the housing. The at least one substrate element is divided into a plurality of zones or sections, the zones at least partially separated from one another to inhibit heat flow. The zones can be at least partially separated with walls. The walls can include insulating material for reducing the mobility of heat radially outwardly. Each of the zones defines a generally separate flow passage connecting the inlet and outlet in fluid communication. The apparatus can heat more rapidly from a cold start compared with conventional catalytic converters.

Abstract: An article including a metal substrate, an anti-coking catalyst layer and an alumina barrier layer disposed between the metal substrate and the anti-coking catalyst layer is provided. A process for making the article is also provided.

Abstract: An apparatus may have a selective catalytic reduction NOx catalyst including a high-temperature catalyst layer having high capability of reducing NOx at high temperatures and a low-temperature catalyst layer having higher capability of reducing NOx at low temperatures than that of the high-temperature catalyst layer. The low-temperature catalyst layer may be arranged closer to a catalyst substrate than the high-temperature catalyst layer. A supply valve may add an addition quantity of reducing agent for reducing NOx to exhaust gas flowing into the selective catalytic reduction NOx catalyst. A controller may comprise at least one processor configured to control addition of the reducing agent by the supply valve such that the reducing agent concentration in a reducing agent atmosphere formed in the exhaust gas flowing into the selective catalytic reduction NOx catalyst is higher when the temperature of the selective catalytic reduction NOx catalyst is in a specific low temperature range.

Abstract: Insulation system for thermoacoustic insulation of a component to be insulated, such as an exhaust gas component, comprising a fiber molded part having a surface facing away from the component to be insulated, where the surface facing away is at least in part jacketed with a cladding, and having an insulation surface facing the component to be insulated, where the fiber molded part is applied to the component to be insulated such that at least one cavity is formed between a portion of the insulation surface of the fiber molded part and the component to be insulated.

Abstract: Catalyst washcoats with improved porosity and methods for making the washcoats are provided. The process comprises incorporation of an oil-in-water macroemulsion into the catalyst slurry prior to washcoating the carrier substrate, and calcining the washcoated carrier substrate to remove the oil-in-water macroemulsion. Also provided are catalyst articles comprising the washcoat and methods for abatement of exhaust gas emissions.

Abstract: An assembly unit 1 of an exhaust system has at least one and particularly two connection funnels 2 made of cast material and a pipe 3. The at least one connection funnel 2 has a pipe socket 21 and at least one bracket 22. The bracket 22 is arranged outside of the pipe socket 21. A connection section 31 of the pipe 3 is fastened to the bracket 22 of the at least one connection funnel. The pipe socket 21 extends beyond the connection section 31 of the pipe 3 into the interior of the pipe 3 and is spaced apart from an inner wall of the pipe 3 by at least the simple wall thickness of the pipe 3.

Abstract: An exhaust purification system comprising an exhaust purification catalyst, a downstream side air-fuel ratio sensor, and a control device performing air-fuel ratio control for controlling an air-fuel ratio of exhaust gas and abnormality diagnosis control for diagnosing the downstream side air-fuel ratio sensor. In the air-fuel ratio control, the control device alternately and repeatedly switches the air-fuel ratio of the exhaust gas flowing into the exhaust purification catalyst between a rich air-fuel ratio and a lean air-fuel ratio. In the abnormality diagnosis control, the control device judges that the downstream side air-fuel ratio sensor has become abnormal when the air-fuel ratio of the exhaust gas is made the rich air-fuel ratio by the air-fuel control and the output air-fuel ratio of the downstream side air-fuel ratio sensor changes from an air-fuel ratio richer than a predetermined lean judged air-fuel ratio to an lean air-fuel ratio.

Abstract: The invention relates to a process for the treatment of a gas stream comprising hydrochloric acid, hydrofluoric acid and fluorinated/oxygenated compounds, in which the gas stream is successively subjected to: a stage of catalytic hydrolysis; a stage of washing with an acid solution; a stage of adsorption of impurities by active charcoal; a stage of adiabatic or isothermal absorption of the hydrochloric acid in an aqueous solution, making it possible to collect hydrochloric acid solution.

Abstract: Provided are a holding material for a gas treatment device, which is inexpensive, has a simple structure, and exhibits high holding force, a gas treatment device, and a method for manufacturing the same. A holding material for a gas treatment device according to the present invention is a holding material, which is a holding material to be arranged, in a gas treatment device including a treatment structure and a casing for housing the treatment structure, between the treatment structure and the casing, the holding material including silica fibers and an alumina sol in an amount of 3 parts by mass or more in terms of a solid content with respect to 100 parts by mass of the silica fibers.

Abstract: A catalysed filter for a positive ignition internal combustion engine comprises a porous filtering substrate having a total substrate length coated with a three-way catalyst washcoat composition comprising at least one precious metal selected from the group consisting of rhodium and one or both of platinum and palladium supported on a high surface area oxide, and an oxygen storage component, which composition being axially shared by a first zone comprising inlet surfaces of a first substrate length<total substrate length and a second zone comprising outlet surfaces of a second substrate length<total substrate length, wherein a sum of the substrate length in the first zone and the substrate length in the second zone?100% and wherein one or both of the following applies: a washcoat loading in the first zone>second zone; and a total precious metal loading in the first zone>second zone.

Abstract: A system for reducing ammonia (NH3) emissions includes (a) a first component comprising a first substrate containing a three-way catalyst, wherein the first component is disposed upstream of a second component comprising a second substrate containing an ammonia oxidation catalyst, wherein said ammonia oxidation catalyst comprises a small pore molecular sieve supporting at least one transition metal; and (b) an oxygen-containing gas input disposed between the components. For example, a CHA Framework Type small pore molecular sieve may be used. A method for reducing NH3 emission includes introducing an oxygen-containing gas into a gas stream to produce an oxygenated gas stream; and exposing the oxygenated gas stream to an NH3 oxidation catalyst to selectively oxidize at least a portion of the NH3 to N2. The method may further include the step of exposing a rich burn exhaust gas to a three-way catalyst to produce the gas stream comprising NH3.

Abstract: A porous discriminating layer is formed on a ceramic support having at least one porous wall by (a) establishing a flow of a gas stream containing agglomerates of particles and (b) calcining said deposited layer to form the discriminating layer. At least a portion of the particles are of a sinter-resistant material or a sinter-resistant material precursor. The particles have a size from 0.01 to 5 microns and the agglomerates have a size of from 10 to 200 microns. This method is an inexpensive and effective route to forming a discriminating layer onto the porous wall.

Abstract: The present invention relates to a method for generating ammonia from an ammonia precursor substance and to the use thereof for reducing nitrogen oxides in exhaust from industrial facilities, from combustion engines, from gas engines, from diesel engines or from petrol engines.

Abstract: Provided is a catalyst structure which prevents an increase in pressure loss by a simple construction while the gas flow is efficiently stirred by a structure making contact between adjacent catalyst elements. The catalyst structure is provided with a first flat-plate part and a second flat-plate part which support, on surfaces thereof, a constituent having catalytic activity to an exhaust gas and face each other, and a stirring part which is provided in such a manner as to come into contact first with the first flat-plate part and the second flat-plate part in an extending manner from the first flat-plate part to the second flat-plate part at a prescribed angle with respect to the direction in which the exhaust gas flows.

Abstract: A catalyst structure for exhaust gas cleaning obtained by superimposing flat plate-like catalyst elements composed of a flat part, which is a main structural part, and a linear spacer part composed of raised strips and recessed strips so that a gas flow channel is ensured along the lengthwise direction of the spacer part, wherein the flat part has at least one baffle part composed of a leg plate erectly provided on the flat part with a height that is less than that of the spacer part with reference to the flat part, and a top plate disposed substantially parallel to the flat part from the upper end of the leg plate. Turbulence can be imparted by the baffle part to gas that flows to the gas flow channel.

Abstract: The present disclosure deals with a gas cleaning system (1) for cleaning process flue gas. The gas cleaning system (1) comprises a reactor inlet duct (13) having a longitudinal axis and a reactor duct (14) fluidly connected perpendicularly to the reactor inlet duct and positioned downstream from the reactor inlet duct. The reactor duct likewise has a longitudinal axis. Within the reactor duct is a gas cleaning device (20), such as a catalytic reactor, and a gas flow rectifier (30) for rectifying flue gas flow from the reactor inlet duct (13) into the reactor duct (14). The gas flow rectifier is arranged in the reactor duct upstream of the gas cleaning device (20), wherein the gas flow rectifier (30) comprises at least one expanded screen (30a).

Abstract: A mounting member that can sufficiently suppress scattering of inorganic fiber material when a pollution control element is assembled in a casing, and that can maintain sufficiently high contact pressure between the inner surface of the casing and the pollution control element, even after the organic binder has combusted. The mounting member of the present invention is for wrapping and mounting a pollution control element (30) in a casing (20), and provides a mat (1) made from inorganic fiber material, and an aggregated substance (5) containing an organic binder and inorganic fine particles that is impregnated throughout most of the mat (1).

Abstract: Aspects of the subject disclosure may include, for example, a catalytic converter system that includes a catalytic converter having a plurality of passages to facilitate at least one catalytic reaction in an exhaust gas from a vehicle engine. A temperature sensor generates a temperature signal indicating at least one temperature of the catalytic converter. An electromagnetic field generator that responds to a control signal by generating an electromagnetic field to inductively to heat the catalytic converter. A controller generates the control signal based on temperature signal. Other embodiments are disclosed.

Abstract: An exhaust system suitable for high volume exhaust from flexible disposable bags is described that prevents nutrient media volume loss and prevents cross-contamination without using any filters. The invention described here allows the use of disposable two-dimensional bioreactors for the cultivation of bacterial and other organisms and cells require high aeration.

Abstract: A particulate separator for a gaseous fluid is provided. The particulate separator includes a sealable collection container defining a collection volume therein. The particulate separator also includes a gaseous fluid conduit provided through the sealable collection container. The gaseous fluid conduit defines an inner channel therein. The gaseous fluid conduit includes an inlet and an outlet. The gaseous fluid conduit also includes an arcuate segment provided between the inlet and the outlet. The arcuate segment includes a plurality of slits formed therein. The plurality of slits is configured to provide fluid communication between the collection volume and the inner channel of the gaseous fluid conduit.

Abstract: A welding structure for a warm-up catalytic converter (WCC) of a vehicle includes a flange of a turbine housing connected to a front cone of the WCC which reduces an exhaust gas emitted from an engine. A through hole is formed in the flange, through which the exhaust gas flows. An extending portion, which extends in a direction in which the exhaust gas flows from the through hole, is formed and surface-contacts the front cone. The front cone is welded to the extending portion to connect the flange to the front cone.

Abstract: Provided is an ammonia slip catalyst article having supported palladium in a top or upstream layer for oxidation of carbon monoxide and/or hydrocarbons, an SCR catalyst either in the top layer or in a separate lower or downstream layer, and an ammonia oxidation catalyst in a bottom layer. Also provided are methods for treating an exhaust gas using the catalyst article, wherein the treatment involves reducing the concentrations of ammonia and optionally carbon monoxide and/or hydrocarbons in the exhaust gas.

Abstract: An emissions control system for an engine of a machine includes an exhaust conduit carrying a flow of exhaust gas from the engine, a de-NOx catalyst disposed along the exhaust conduit and configured to treat the flow of exhaust gas, a fuel reformer module configured to provide a gas stream containing hydrogen gas and carbon monoxide gas, and a junction disposed along the exhaust conduit between the engine and the de-NOx catalyst, the junction being arranged to mix at least a portion of the gas stream with the flow of exhaust gas such that the hydrogen gas and the carbon monoxide reach the de-NOx catalyst and act as reductants to regenerate the de-NOx trap.

Abstract: Provided is a catalyst article for simultaneously remediating the nitrogen oxides (NOx), particulate matter, and gaseous hydrocarbons present in diesel engine exhaust streams. The catalyst article has a soot filter coated with a material effective in the Selective Catalytic Reduction (SCR) of NOx by a reductant, e.g., ammonia.

Abstract: The present disclosure related to a method for manufacturing a structure with cellular cores that can be used in a structural panel of a turbojet nacelle, including at least one block of cellular cores. The at least one block of cellular cores includes a central portion with core honeycomb cells, and two side portions each including side honeycomb cells. The side honeycomb cells have edge honeycomb cells situated on edges of a side part of a block, and adjacent honeycomb cells. In particular, the method includes: A) forming junction walls on the side honeycomb cells by opening the edge honeycomb cells, the junction walls being capable of interacting for forming a junction area; B) unfolding the junction walls thus formed in step A; and C) joining the junction walls thus unfolded in step B and belonging to two different side portions end-to-end.

Abstract: A holding seal material made of a laminated mat configured by laminating a plurality of mats containing an inorganic fiber and having a rectangular planar shape so that longitudinal-direction lengths of the respective mats sequentially increase as the mats are laminated, in which the film is attached to a principal surface of the mat configuring the laminated mat and having a longest longitudinal-direction length on an opposite side to a side on which the mat having the longest longitudinal-direction length is in contact with other mats and longitudinal-direction side surfaces of the mat having the longest longitudinal-direction length, and the film is attached to a principal surface of the mat having the longest longitudinal-direction length on the side on which the mat having the longest longitudinal-direction length is in contact with other mats in a state in which a part of the principal surface is exposed.

Abstract: An after-treatment system for treating exhaust gas discharged from a combustion engine, the after-treatment system comprising an exhaust after-treatment component including an exhaust after-treatment substrate, the exhaust after-treatment substrate including an inlet face including a first zone having a first catalyst located at a center of the inlet face, and a second zone having a second catalyst located radially outward from the center of the inlet face, wherein an amount of the exhaust gas that travels through the first zone is greater than an amount of the exhaust gas that passes through the second zone, and a catalyst loading of the first catalyst in the first zone is less than a catalyst loading of the second catalyst in the second zone.

Abstract: A structure comprising at least one inorganic layer comprising inorganic materials suitable for use in a pollution control device. A friction-inducing material is disposed on at least one side of the inorganic layer. The deposited friction-inducing material defines a higher friction area exhibiting a static coefficient of friction higher than that of the inorganic materials. A lower friction layer is disposed so as to cover at least a portion of the higher friction area and define an exposed surface area of the structure. The exposed surface area exhibits a lower static coefficient of friction than that of the higher friction area. The lower friction layer no longer covers a substantial portion of the higher friction area, after the pollution control device is assembled.

Abstract: Described are SCR catalyst systems comprising a first SCR catalyst composition and a second SCR catalyst composition arranged in the system, the first SCR catalyst composition having a faster DeNOx response time when exposed to ammonia than the second catalyst composition and the second SCR catalyst composition has a higher steady state DeNOx performance than the first catalyst composition. The SCR catalyst systems are useful in methods and systems to catalyze the reduction of nitrogen oxides in the presence of a reductant.

Abstract: A catalyst comprising a zeolite loaded with copper ions and at least one trivalent metal ion other than Al+3, wherein the catalyst decreases NOx emissions in diesel exhaust. The trivalent metal ions are selected from, for example, trivalent transition metal ions, trivalent main group metal ions, and/or trivalent lanthanide metal ions. In particular embodiments, the catalysts are selected from Cu—Fe-ZSM5, Cu—La-ZSM-5, Fe—Cu—La-ZSM5, Cu—Sc-ZSM-5, and Cu—In-ZSM5. The catalysts are placed on refractory support materials and incorporated into catalytic converters.

Abstract: A method of treating an exhaust gas produced by a vehicle internal combustion engine includes conveying the gas through a first reactor including a non-thermal plasma. The gas includes nitric oxide and is transitionable between a first condition in which the gas has a cold-start temperature that is less than or equal to about 150° C., and a second condition in which the gas has an operating temperature that is greater than about 150° C. During the first condition, the method includes contacting the gas and plasma to oxidize the nitric oxide to nitrogen dioxide and form an effluent that includes nitrogen dioxide. The method includes concurrently conveying the effluent through a second reactor including a diesel oxidation catalyst, and storing the nitrogen dioxide within the second reactor during only the first condition. The method includes, after storing, releasing nitrogen dioxide from the second reactor during only the second condition.

Abstract: A spreader bar assembly is provided. The spreader bar assembly includes a pair of arms disposed in a scissor type arrangement. The pair of arms defines an axis of rotation therebetween. The spreader bar assembly further includes a contact member attached to an end of each of the pair of arms. The contact member of the spreader assembly is configured to contact with a catalyst. The spreader assembly also includes a sealing member. The sealing member is provided in association with the contact member. The sealing member is disposed on a first side of each of the pair of arms such that on exerting a force on the sealing member on the first side of each of the pair of arms, an opposing force is generated on a second side of each of the pair of arms disposed substantially opposite the first side of each of the pair of arms.

Abstract: Provided are emissions treatment systems for an exhaust stream having an ammonia-generating component, such as a NOx storage reduction (NSR) catalyst or a lean NOx trap (LNT) catalyst, and an SCR catalyst disposed downstream of the ammonia-generating catalyst. The SCR catalyst can be a molecular sieve having the CHA crystal structure, for example SSZ-13 or SAPO-34, which can be ion-exchanged with copper. The LNT can be layered, having an undercoat washcoat layer comprising a support material, at least one precious metal, and at least one NOx sorbent selected from the group consisting of alkaline earth elements, rare earth elements, and combinations thereof and a top washcoat layer comprising a support material, at least one precious metal, and ceria in particulate form, the top washcoat layer being substantially free of alkaline earth components. The emissions treatment system is advantageously used for the treatment of exhaust streams from diesel engines and lean burn gasoline engines.

Abstract: A catalyst which remediates hydrocarbon fuel combustion exhaust, including a non-PGM containing aerogel which catalyzes the oxidation of carbon monoxide and hydrocarbons and the reduction of nitrogen oxides present in the exhaust, a catalytic converter made therefrom, and a method for the production thereof is disclosed.

Abstract: A catalyzed filter for a positive ignition internal combustion engine comprises a porous filtering substrate having a total substrate length coated with a three-way catalyst washcoat composition comprising at least one precious metal selected from the group consisting of rhodium and one or both of platinum and palladium supported on a high surface area oxide, and an oxygen storage component, which composition being axially shared by a first zone comprising inlet surfaces of a first substrate length<total substrate length and a second zone comprising outlet surfaces of a second substrate length<total substrate length, wherein a sum of the substrate length in the first zone and the substrate length in the second zone?100% and wherein one or both of the following applies: a washcoat loading in the first zone>second zone; and a total precious metal loading in the first zone>second zone.

Abstract: A method for treating engine exhaust. The method includes contacting an NOx exhaust with an upstream catalyst material coated onto a substrate and including copper or iron loaded in a first zeolite at an upstream loading of 0 to 3.5 g/l to convert the NOx exhaust in a first temperature range of 150° C. to 500° C. to a first NOx converted exhaust. The method further includes contacting the first NOx converted exhaust with a downstream catalyst material coated onto the substrate downstream of the upstream catalyst material and including copper or iron loaded in a second zeolite at a downstream loading of 1.5 to 9.5 g/l to convert the first NOx converted exhaust in a second temperature range of 450° C. to 700° C.

Abstract: An exhaust treatment system may include gas, reductant and water conduits, a nozzle and a pump. The gas conduit may be in fluid communication with a source of compressed gas and may include a first valve controlling a flow of compressed gas through the gas conduit. The water conduit may be in fluid communication with a water source and may include a second valve controlling a flow of water through the water conduit. The nozzle may be in fluid communication with the gas, reductant and water conduits. The pump may be disposed between the nozzle and the second valve and may be in fluid communication with the reductant and water conduits. The pump may be operable in a first pumping direction to pump reductant from the reductant source to the nozzle and in a second pumping direction to pump reductant away from the nozzle and toward the reductant source.

Abstract: The present invention provides a catalyst for the decomposition of a perfluorinated compound containing a halogen acid gas, and a preparation method thereof. According to the present invention, the Ru—P—Al tri-component catalyst for the decomposition of a perfluorinated compound shows an excellent decomposition activity and durability with respect to the decomposition and removal of a perfluorinated compound containing a halogen acid gas, and thus can be used to decompose a chamber cleaning gas, an etchant, a solvent and the like of a perfluorinated compound from the semiconductor manufacturing industry to the LCD processing field. In addition, the present invention can be useful for decomposing and removing a perfluorinated compound discharged in a process using a halogen acid gas such as F2, Cl2, Br2 and the like.

Abstract: Provided are emissions treatment systems for an exhaust stream having an ammonia-generating component, such as a NOx storage reduction (NSR) catalyst or a lean NOx trap (LNT) catalyst, and an SCR catalyst disposed downstream of the ammonia-generating catalyst. The SCR catalyst can be a molecular sieve having the CHA crystal structure, for example SSZ-13 or SAPO-34, which can be ion-exchanged with copper. The LNT can be layered, having an undercoat washcoat layer comprising a support material, at least one precious metal, and at least one NOx sorbent selected from the group consisting of alkaline earth elements, rare earth elements, and combinations thereof and a top washcoat layer comprising a support material, at least one precious metal, and ceria in particulate form, the top washcoat layer being substantially free of alkaline earth components. The emissions treatment system is advantageously used for the treatment of exhaust streams from diesel engines and lean burn gasoline engines.

Abstract: Objects of the invention are to provide silicoaluminophosphate particles that have excellent NOx purification performance and can suppress water adsorption-caused contraction and water desorption-caused expansion and to provide a honeycomb structure that has excellent NOx purification performance and can suppress the breakage of the honeycomb unit due to the adsorption or desorption of water, a method for manufacturing the honeycomb structure, and an exhaust gas purifying apparatus including the honeycomb structure. The silicoaluminophosphate particles of the invention have a metallic oxide attached to silicoaluminophosphate particles with a ratio of an amount of Si to a sum of amounts of Al and P in a range of 0.16 to 0.33, in which a specific surface area is in a range of 250 m2/g to 450 m2/g, and an external surface area is in a range of 10 m2/g to 35 m2/g.

Abstract: Described herein are methods of operating a gas turbine engine (12) for reduced ammonia slip. An exemplary method (100) includes operating (102) the engine over a range of power output levels; controlling (104) a mass flow of NOx produced in exhaust (19) of the engine to be within 10% over the range of power output levels; and treating (106) the exhaust of the engine in a selective catalytic reduction process (22). In this way, the production of NOx and a corresponding flow of reducing agent (33) utilized in the SCR process remain relatively constant in terms of mass (molar) flow throughout the range of power output levels and ammonia slip is controlled.

Abstract: A honeycomb structure including porous partition walls, a porosity of the partition walls is from 45 to 70%, and when pores having the maximum width in excess of 10 ?m in a cross section of each of the partition walls are large pores and the partition wall is equally divided into three regions of a center region and surface layer regions present on both sides of the center region, a total area of cross sections of the large pores which appear in the surface layer regions is from 60 to 100% of a total area of cross sections of all the pores which appear in the surface layer regions, and a total area of cross sections of the large pores which appear in the center region is from 0 to 40% of the total area of cross sections of all the pores which appear in the center region.

Abstract: An exhaust aftertreatment system for a diesel-powered genset includes a Diesel Exhaust Fluid (DEF) injection system, a housing, a Selective Catalyst Reduction (SCR) section disposed within the housing and a support configured to support the exhaust aftertreatment system. The DEF injection system includes a housing having an inlet region and an outlet region. A stationary upstream mixer increases turbulence of exhaust entering the inlet region. A stationary downstream mixer increases turbulence of exhaust exiting the outlet region. The DEF injection system includes a DEF injector. The SCR section includes a housing having an inlet and outlet, an SCR catalyst mounted in the housing, and a diameter that is greater than a diameter of the DEF injection section housing. A Diesel Particulate Filter (DPF) section can be disposed within the housing between the DEF injection section and the SCR section.

Abstract: A catalytic converter for use in motor vehicle exhaust systems includes a housing and a catalytic substrate disposed in the housing. The housing includes a central shell fixed to an inlet end cone and an outlet end cone. The catalytic substrate includes a primary body section disposed in an internal chamber of the central shell and a secondary body section disposed in an inlet chamber of the inlet end cone. The secondary body section includes a shaped face surface that is exposed to hot exhaust gases supplied to the inlet chamber to assist in improved light-off and improved purification efficiency.

Abstract: Disclosed here are material formulations of use in the conversion of exhaust gases, where the formulations may include Copper (Cu), Cerium (Ce), Tin (Sn), Niobium (Nb), Zirconium (Zr), Calcium (Ca) and combinations thereof.

Abstract: An exhaust purification apparatus includes: a purification duct configured to purify air to be discharged from a ventilation port in an image forming apparatus, the purification duct including: at least one inlet communicating with an interior of the purification duct for connection with the ventilation port in the image forming apparatus; an outlet configured to discharge air inside the purification duct to the outside; a fan configured to direct air from the inlet toward the outlet; a filter configured to recover particles in the air, the fan and the filter each being disposed in the purification duct at a position between the inlet and the outlet; an airflow detector configured to detect an airflow at the inlet; and a controller configured to execute a normal mode and an attachment determination mode.