Abstract: An exhaust system is for a marine propulsion device having an internal combustion engine. A catalyst housing has a housing inlet end that receives an exhaust gas flow from the internal combustion engine into the catalyst housing and an opposite, housing outlet end that discharges the exhaust flow out of the catalyst housing. A catalyst is disposed in the catalyst housing. The catalyst has a catalyst inlet end that receives the exhaust gas flow and an opposite, catalyst outlet end that discharges the exhaust gas flow. A catalyst mantel is on an outer periphery of the catalyst. The catalyst mantel has a mantel inlet end and an opposite, mantel outlet end. A radial flange is on at least one of the mantel outlet end and mantel inlet end. A connector mates with an inner diameter of the catalyst housing. The radially extending flange of the catalyst mantel is axially sandwiched between the connector and a radially inner shoulder of the catalyst housing.

Abstract: There is disclosed a plugged honeycomb structure. A plugged honeycomb structure includes a tubular honeycomb structure body having partition walls including a porous partition wall base material defining a plurality of cells which become through channels for a fluid and extend from a first end face to a second end face, and a porous trapping layer disposed on the surface of the partition wall base material; and plugging portions disposed in open ends of predetermined cells in the first end face and open ends of residual cells in the second end face, and the partition wall base material is constituted of a porous body including ?-Al2O3 as a main phase and further including aluminum titanate and glass.

Abstract: A flowhood is provided to which an upstream conduit and a downstream conduit of an emissions cleaning module can be connected includes a first section and a second section. The second section includes a first aperture for connection to the upstream conduit and a second aperture for connection to the downstream conduit. The first and second apertures may face substantially in the same direction to permit a compact arrangement. A body of the first section may be shaped to channel gas flow from the first aperture to the second aperture. An emissions cleaning module including such a flowhood is also described.

Abstract: An exhaust system injection section (10) includes an exhaust gas flow channel (19), a laterally arranged injector connection (21), with a fluid introducing injector (22) and an injection chamber (24) formed in the channel, which is delimited by a perforated first separating wall (25), arranged in the channel upstream of the injector connection, and a perforated second separating wall (26) arranged in the channel downstream of the injector connection. To provides intensive mixing of the injected fluid with the exhaust gas flow a perforation (29) of the first separating wall (25) is configured so that exhaust gas largely flows eccentrically through the first separating wall (25) with respect to a longitudinal center axis (23) of the channel and a perforation (31) of the second separating wall (26) is configured so that exhaust gas largely flows concentrically through the second separating wall (26) with respect to the longitudinal center axis (23).

Abstract: Provided is a catalytic converter, having a first casing, a first honeycomb carrier disposed in the first casing, multiple second casings connected to the first casing, and multiple second honeycomb carriers each respectively disposed in the second casings. The first honeycomb carrier has multiple first metal sheets and a first catalyst layer formed on the first metal sheets. The first metal sheets are disposed in the first casing to form multiple first channels. Each of the second honeycomb carriers has a similar structure with that of the first honeycomb carrier. The materials of the first and the second catalyst layers include platinum, palladium, and rhodium. The exhaust gas is subjected to redox reaction by the first and the second catalyst layers and burned at high temperature, and thus the emission of the harmful components from the diesel engine is reduced.

Abstract: A vortex flow apparatus including a cylindrical housing that contains a fluid that flows in a swirling circular path. The apparatus may be utilized as a muffler for a combustion engine, a particle separator, or an energy conversion device that physically or chemically acts upon the fluid flow and particles contained within the apparatus. The housing defines an inlet opening that opens into the first end of the housing proximate a first end wall. An outlet tube defines an outlet opening through a first end wall. A projection is attached to a second end wall of the housing and extends into the housing. The outlet tube and projection are aligned with and centered relative to a central axis.

Abstract: A compact Selective Catalytic Reduction (SCR) system comprising a system inlet, a gas flow system and a plurality of catalyst clusters is described. The system inlet is configured to utilize heat of the cleaned exhaust to vaporize a solution of a reductant, or a precursor of a reductant, and to mix the vaporized reductant with exhaust gas to form a mixed gas. The gas flow system is configured to provide the mixed gas from the system inlet to a plurality of catalyst clusters and to provide heat from the exhaust gas to assist in vaporization of the reductant/precursor and to assist in the conversion of the precursor to the reductant. The plurality of catalyst clusters comprise SCR and ASC catalysts but can also include filter functionality.

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: An air pollution control apparatus includes: a denitration unit that removes nitrogen oxides from a flue gas; a desulfurization unit that is installed on a gas flow downstream side of the denitration unit to remove the sulfur oxides in a flue gas 11B; a finish denitration and desulfurization unit that is installed on the gas flow downstream side of the desulfurization unit to perform finish denitration and desulfurization of NO2 and SO2; and a carbon dioxide recovery unit that is installed on the gas flow downstream side of the finish denitration and desulfurization unit to remove and recover the carbon dioxide in a flue gas.

Abstract: An exhaust gas purification device having such a structure that exhaust gas can uniformly flow into without depending on a shape of an exhaust gas inlet pipe. A gas purification body which purifies the exhaust gas, a purification casing which accommodates the gas purification body, an exhaust gas inlet pipe which communicates with an exhaust gas inflow port of the purification casing, and an exhaust gas outlet pipe which communicates with an exhaust gas outflow port of the purification casing. The exhaust gas inlet pipe is attached to the purification casing in such a manner as to cover the exhaust gas inflow port and extend in a longitudinal direction of the purification casing. An introduction passage of the exhaust gas is formed by an outside surface of the purification casing and an inside surface of a pipe wall of the exhaust gas inlet pipe.

Abstract: Provided are a composite material that has lower volume resistivity in comparison with SiC, SiC—Si, and the like, which are materials for forming constituent elements of an EHC, has low temperature dependence of volume resistivity, and thus is able to form a constituent element of a high-performance EHC; an electrode film, an electrode terminal, and a honeycomb substrate that are constituent elements of an EHC formed with such composite material, and a method for producing them. The composite material contains MoSi2 and at least one of Si or SiC, and is a material for forming a constituent element of an electrically heated catalytic converter. An electrode film 2, an electrode terminal 3, and a substrate 1 are produced from such composite material.

Abstract: A catalyst converter includes: a substrate (1) having a cell structure formed of a center area (1A) having the highest cell density, a peripheral area (1C) having the lowest cell density, and an intermediate area (1B) having the cell density between that of the center area and that of the peripheral area; a first catalyst layer formed in the center area (1A); a second catalyst layer formed in the intermediate area (1B); and a third catalyst layer formed in the peripheral area (1C). A length in a longitudinal direction of the second catalyst layer is longer than that of the first catalyst layer. A length in the longitudinal direction of the third catalyst layer is longer than that of the second catalyst layer. A ratio of the length in the longitudinal direction of the first catalyst layer to the length of the substrate is 65% or more.

Abstract: An exhaust treatment system for a work vehicle, which has an exhaust conduit transmitting an exhaust flow from an engine and to a DOC system, is disclosed. The DOC system has a reductant introduced and mixed into the exhaust flow, and a DOC conduit connects the DOC to a center inlet of an SCR. The SCR includes at least two exhaust chambers. When the exhaust flow enters the SCR at the center inlet, the exhaust flow enters a central chamber where it is split into at least two separate exhaust flows which are moved in at least two different directions away from each other. Each separate exhaust flow is moved through a separate exhaust chamber and substrate. A conduit moves at least one of the separate exhaust flows into an area holding another exhaust flow, and the two separate exhaust flows are combined and expelled through an outlet.

Abstract: Incorporated in an exhaust pipe are an HC-SCR NOx catalyst capable of reducing NOx at temperatures less than a set temperature T and a catalyzed particulate filter with an oxidation catalyst capable of reducing NOx at temperatures not less than the set temperature T. When an exhaust gas temperature is less than the set temperature T, fuel with a set flow rate Q is intermittently added from a fuel addition unit on an entry side of the HC-SCR NOx catalyst to the HC-SCR NOx catalyst; when the exhaust gas temperature is not less than the set temperature T, the fuel with flow rate Q? not less than the set flow rate Q is temporarily rich-spike added from the fuel addition unit and is made arrival at a catalyzed particulate filter. With an active temperature range being expanded, exhaust emission control is performed in a wide temperature range.

Abstract: An aftertreatment system comprises a first SCR system, a second SCR system positioned downstream of the SCR system and a reductant storage tank. At least one reductant insertion assembly is fluidly coupled to the reductant storage tank. The at least one reductant insertion assembly is also fluidly coupled to the first SCR system and the SCR system. A controller is communicatively coupled to the reductant insertion assembly. The controller is configured to instruct the reductant insertion assembly to asynchronously insert the reductant into the first SCR system and the second SCR system.

Abstract: A reactor apparatus and method for removing and/or reducing NOx, CO, carbon particulates and hydrocarbons from exhaust gases produced by industrial processes includes a reactor including an inlet plenum, a reaction chamber, an outlet plenum, and a heat exchanger wherein gases exiting the reaction chamber heat gases entering the reaction chamber. EGR is drawn through a cooling heat exchanger with an injection blower and is delivered through control valves to the reaction chamber, the inlet plenum and to an add fuel mixing chamber whereby mixed fuel and EGR is delivered to the reaction chamber. A feedback controller controls the flow valves responsive to the temperatures in the reaction chamber entrance and the outlet plenum.

Abstract: The present invention provides a highly durable, electrically heated catalytic converter including an inner tube on which an insulation layer is formed, wherein the insulation layer is less susceptible to damage such as cracking and peeling even when thermal stress occurs in a curvature section of the inner tube where the insulation layer is formed.

Abstract: A flue gas treatment apparatus has a flue gas inlet, a treated gas outlet downstream of the flue gas inlet, and a gas flow path therebetween. The flue gas treatment apparatus comprises a particulate removal device. A first heater is downstream of the particulate removal device. The first heater heats the flue gas to a first treatment temperature. A first catalytic converter is downstream of the first heater for eliminating at least some CO and SO2 from the flue gas. A second heater is downstream of the first catalytic converter for heating the flue gas to a second treatment temperature. A second catalytic converter is downstream of the second heater for eliminating at least some NOx from the flue gas. At least a first fan forces the flue gas from the flue gas inlet to the treated gas outlet.

Abstract: A vehicle exhaust system includes a mixer having an inlet that receives engine exhaust gases and an outlet to direct swirling engine exhaust gas to a downstream exhaust component. The mixer has a plurality of internal surfaces that come into contact with the engine exhaust gases. At least one of the internal surfaces has a coating comprised of a low-coefficient of friction material.

Abstract: A vehicle exhaust system includes a mixer having an inlet that receives engine exhaust gases and an outlet to direct swirling engine exhaust gas to a downstream exhaust component. The mixer has a plurality of internal surfaces that come into contact with the engine exhaust gases. At least one of the internal surfaces has a coating comprised of a low-coefficient of friction material.