Abstract: A porous ceramic honeycomb article comprising a honeycomb body formed from cordierite ceramic, wherein the honeycomb body has a porosity P %?55% and a cell channel density CD ?150 cpsi. The porous channel walls have a wall thickness T, wherein (11+(300?CD)*0.03)?T?(8+(300?CD)*0.02), a median pore size ?20 microns, and a pore size distribution with a d-factor of ?0.35. The honeycomb body has a specific pore volume of VP?0.22. The porous ceramic honeycomb article exhibits a coated pressure drop increase of ?8 kPa at a flow rate of 26.5 cubic feet per minute when coated with 100 g/L of a washcoat catalyst and loaded with 5 g/L of soot.

Abstract: A honeycomb structure includes at least one honeycomb unit including zeolite, an inorganic binder, and cell walls. The cell walls extend from a first end face to a second end face to define cells along a longitudinal direction of the at least one honeycomb unit. Each of the cell walls includes a center part in the longitudinal direction and a first end part adjacent to the first end face. The first end part has a thickness larger than a thickness of the center part, and/or the first end part has a porosity smaller than a porosity of the center part.

Abstract: An exhaust treatment device includes an inner shell, an outer shell and insulation material positioned between the inner shell and the outer shell. An inlet tube has an end in communication with a cavity defined by the inner shell. A substrate for treating engine exhaust is positioned within the inner shell. A baffle plate includes a plurality of apertures positioned such that the exhaust passes through the apertures prior to entering the substrate. The baffle plate supports an end of the inner shell and the inlet tube.

Abstract: The present invention relates to a selective catalytic reduction (SCR) reactor assembly for removing fine particles that interfere with SCR catalyst activity in biomass fuel applications. The selective catalytic reduction (SCR) reactor assembly includes at least one turning vane disposed in a plenum chamber of the reactor, at least one rectifier layer disposed downstream of the at least one turning vane, and at least one active catalyst layer for removing particulate matter. The turning vane is adapted to impart a directional turn to the flue gas flowing through the reactor, and the at least one rectifier ensures even flow distribution.

Abstract: There is disclosed a honeycomb structure including a honeycomb structure section, and a pair of band-like electrode sections arranged on a side surface of the honeycomb structure section, an electrical resistivity of the honeycomb structure section is from 1 to 200 ?cm, in a cross section which is perpendicular to an extending direction of cells, the one electrode section is disposed on an opposite side of the other electrode section via the center O, an angle which is 0.5 time as large as a central angle of the electrode section is from 15 to 65°, and each of the electrode sections is formed so as to become thinner from a center portion in a peripheral direction toward both ends in the peripheral direction in the cross section which is perpendicular to the cell extending direction in a honeycomb structure.

Abstract: A combustion-type exhaust gas treatment apparatus is used to treat a harmful exhaust gas by combustion to render the gas harmless. The treatment apparatus includes a combustion treatment section, a cooling section, and a washing section. The combustion treatment section includes an exhaust-gas treatment combustor, a body made from metal and having a roughened inner surface, and a water-film formation mechanism adapted to form a water film on the inner surface of the body. The combustion treatment of the exhaust gas is performed in the body.

Abstract: Particulate filters for reducing NOx and particulate matter in diesel exhaust and methods for forming the same are disclosed. In one embodiment, a particulate filter may include a honeycomb body with a plurality of channel walls extending from an inlet end to an outlet end. At least a first set of the channels are plugged proximate at least one of the inlet end or the outlet end. A filter zone may extend from the inlet end in an axial direction of the particulate filter. A DeNOx zone may be located downstream of the filter zone. The channel walls of the particulate filter may include a DeNOx functional catalyst in the DeNOx zone and a ratio of the permeability ?fz of the channel walls in the filter zone to the permeability ?Dz of the channel walls in the DeNOx zone (?fz:?Dz) is at least 2.

Abstract: A holding sealing material includes a mat body. The mat body includes a first inorganic fiber and a second inorganic fiber. The first inorganic fiber contains about 60% by weight or more of alumina. The second inorganic fiber contains about 67% by weight or more of silica. The first inorganic fiber and the second inorganic fiber are in a mixed state.

Abstract: An exhaust gas treatment device (1) for an exhaust system of an internal combustion engine, especially of a motor vehicle, has a multipart housing (2), which contains an oxidation-type catalytic converter unit (5) and, downstream therefrom, a particle filter unit (6) one after another in an axial direction extending in parallel to a longitudinal direction (3) of the housing. The housing (2) contains an inlet housing part (7), which has an exhaust gas inlet (8) and the oxidation-type catalytic converter unit (5), and an outlet housing part (9), which has an exhaust gas outlet (10) and into which the particle filter unit (6) axially protrudes.

Abstract: A honeycomb structure includes a honeycomb unit. The honeycomb unit includes plural cells, inorganic particles, and at least one of a flake substance, a tetrapod-shaped substance, and a three-dimensional needle-shaped substance. The plural cells extend from a first end face to a second end face of the honeycomb structure along a longitudinal direction of the honeycomb structure. The plural cells are defined by cell walls.

Abstract: An apparatus (10) comprising a lean burn internal combustion engine (12) and an exhaust system (14) comprising at least one catalytic aftertreatment component (18, 20, 22), wherein the at least one catalytic aftertreatment component comprises a catalyst composition comprising an alloy consisting of palladium and gold on a metal oxide support.

Abstract: A catalytic converter substrate structure includes an outer peripheral wall having a first end and a second end. A plurality of cells are defined by walls that are disposed within the outer peripheral wall and are interconnected to the outer peripheral wall. The plurality of cells extend axially along a length of the outer wall and have a varying density.

Abstract: A manufacturing method by which alumina-silica based fibers excellent in mechanical strength can be readily and securely obtained. The method obtains precursor fibers as a material by using an alumina-silica based fiber spinning stock solution for use in an inorganic salt method. Next, the precursor fibers are heated under an environment which makes it difficult to carry out an oxidizing reaction on the carbon component contained in the precursor fibers. Thus, the precursor fibers are sintered to obtain alumina-silica based fibers.

Abstract: To obtain a catalytic converter device that can suppress a drop in the effect of heating a catalyst carrier caused by water droplets produced in an exhaust pipe. A holding mat that holds a catalyst carrier in a case cylinder is given a three-layer structure comprising an inside fiber layer, a solid layer, and an outside fiber layer. The solid layer projects toward an upstream side from an upstream-side end face of the catalyst carrier, and an interstice portion is configured between the projecting portion and the case cylinder. Water droplets adhering to the inner peripheral surface of the case cylinder do not reach the catalyst carrier because the projecting portion serves as a barrier.

Abstract: An exhaust gas purifying device includes: a case body including a plurality of cases, and heat insulating rings and heat insulators that cover the case body over a substantially-entire area from an upstream side to a downstream side in an exhaust gas flowing direction. The heat insulators are placed inward from joint portions between the cases, and the heat insulating rings are placed in such a manner as to bridge over the joint portions between the cases. With the above arrangement, the surface temperature of the case body can be reliably prevented from becoming high.

Abstract: Disclosed is a diesel particle filter with a ceramic filter body and a method for producing the filter body. The ceramic filter body includes gas channels provided in a filter section with planar and porous filter walls. The filter walls provide throughflow of the exhaust gas flow perpendicular to the surfaces thereof. The filter body includes at least one catalytic section for catalytic purification of the exhaust gas flow. The filter body together with the filter section and the at least one ceramic section are made in one-piece from at least one ceramic impregnated fiber web. Gas channels are formed by sintering the fiber web at a temperature such that fibers of the fiber material are burned away and the ceramic material is monolithically sinter-bonded in one-piece with the at least one catalytic section and the filter section to produce the filter body.

Abstract: A honeycomb body includes ceramic walls all being entirely formed of printed layers forming channels through which a fluid can flow. The channels lie next to one another. At least one of at least one measuring sensor or electrically conductive mass forms a monolithic, unitary structure with one of the ceramic walls. Sensor material may be used as an alternative to ceramic material. A method of producing the honeycomb body is also provided.

Abstract: A mat or mat-pre-form hybrid for use in an exhaust gas treatment device, such as catalytic converters and diesel particulate traps that are used in automotive exhaust systems. The mat or hybrid may be used as a mounting mat to mount a fragile monolith within an outer housing of an exhaust gas treatment device or as thermal insulation in an end cone of the exhaust gas treatment device.

Abstract: An air pollution control apparatus 10 according to an embodiment of the present invention has a denitration catalyst layer 13 that removes NOx in flue gas 12, and atomizes HCl into the flue gas 12 to oxidize Hg, and also includes a swirling-flow generating member 30A that includes a swirling-flow generating-member body being partitioned to correspond to each passage of the denitration catalyst layer 13 and a plurality of swirling-flow generating vanes arranged on the partition inner walls to generate a turbulent flow, on an inlet 13a side of the denitration catalyst layer 13. With this configuration, a laminar flow of the flue gas 12 in a flue gas duct 19 is changed to a swirling flow, thereby enabling to increase a contact time between the flue gas 12 and a denitration catalyst and to improve the oxidation reaction efficiency between Hg in the flue gas 12 and the denitration catalyst.

Abstract: A honeycomb structured body of the present invention comprises a plurality of cells placed in parallel with one another in a longitudinal direction with a cell wall therebetween, wherein an oxide catalyst is supported on at least one portion of the cell wall, and the honeycomb structured body has an apparent density of about 0.7 g/cm3 or less.