496results about "Catalyst support" patented technology

Methods for treating a filter for filtering particulate matter from exhaust gas are disclosed in which a dry powder is sprayed towards an inlet face of the filter entrained in a primary flow of gas to pass through the inlet face to contact a porous structure of the filter. The back pressure of the filter is monitored during spraying of the dry powder and the spraying of the dry powder is stopped when the back pressure of the filter reaches a required value. The required value may equal an absolute back pressure, or a pre-determined target back pressure for the filter minus an offset pressure, or an estimated back pressure of the filter.

An exhaust treatment method and apparatus for treating an exhaust stream flowing through an exhaust line housing in a downstream direction, the apparatus comprising a first particulate filter, an SCR unit, and a second particulate filter downstream of the SCR unit, all serially positioned in the exhaust line.

The invention relates to an exhaust-gas aftertreatment unit (1) comprising a casing (2), a support structure (5) and a honeycomb body (3) which is secured to or supported on the support structure (5) by means of a plurality of support pins (4), wherein the support structure (5) has at least one at least partly circumferential frame (6). A plurality of spoke elements (7) are connected to the frame (6) at least in an end region (8), said plurality of spoke elements (7) having a minimum width, and the plurality of spoke elements (7) have a plurality of plateaus (9) which have a width that is at least 50% wider than the minimum width. At least two receptacles (10) are provided on at least one plateau (9) of the plurality of plateaus (9), and the receptacles (10) are designed to receive a pin end (11) of a support pin (4).

The present invention provides an exhaust gas purification catalyst in which platinum group metal migration from a catalyst layer to a base material during high temperature duration is suppressed. The exhaust gas purification catalyst disclosed herein includes a base material, a catalyst layer, and an intermediate layer arranged between the base material and the catalyst layer. The base material contains SiC. The catalyst layer contains a platinum group metal as a catalyst component. The intermediate layer contains substantially no platinum group metal. A product of a thickness of the intermediate layer (μm) and a specific surface area (m2 / g) of the intermediate layer is 1100 or more.

An exhaust mixer assembly includes a mixer housing, an inlet opening, an inlet plate, a support plate, a support plate opening, a conveying tube, an outlet plate, and an outlet plate opening. The mixer housing is coupled to the upstream housing. The inlet plate and the support plate define a first mixing chamber. The inlet opening is configured to receive exhaust from the upstream housing and deliver exhaust to the first mixing chamber. The support plate and the outlet plate define a second mixing chamber. The conveying tube is positioned in the second mixing chamber. The support plate opening is configured to receive treated exhaust from the first mixing chamber and deliver the treated exhaust to the second mixing chamber. The treated exhaust circumferentially flows through the second mixing chamber and through the conveying tube. The conveying tube delivers reductant to the outlet plate opening.

A method of making a ceramic honeycomb wall-flow filter substrate supporting an on-wall coating, a fragment of which on-wall coated filter substrate analysed by mercury porosimetry has a volume of pores of 005 to 0.5 µm diameter as a percentage of a mercury intrusion volume of the fragment of at least 15.0%, comprises the steps of: (i) preparing a slurry comprising water, a carboxylic acid, inorganic oxide particles or a mixture of two or more inorganic oxide particles having a D(v, 0.9) of 8 to 20 µm; and 10 to 35 % by weight relative to 100% weight of the inorganic oxide particles of a particulate insoluble cellulose pore former of non-uniform morphology and having an equivalent spherical diameter D(v, 0.5) of 0.5 to 14 µm and a modal aspect ratio (width / length) of 0.3 to 0.9; (ii) coating the slurry on at least first channels of the substrate, wherein the substrate has a mean pore size (D50) of 6 to 15 µm prior to any coating and a porosity less than 60% prior to any coating; and (iii) drying and calcining the slurry-coated substrate, whereby sufficient slurry is coated on the substrate so that the product of step (iii) has a coating loading of 0.07 to 0.4 g / in3 (4.3 to 24.4 g / L), relative to a substrate weight prior to step (ii) and wherein a mean average on- wall coating thickness of the coated substrate is 5 to 70 µm.

Apparatus and methods are provided for the manufacture of filtration articles. The apparatus and methods include a separate first chamber for dispersion of the inorganic particles and a larger second chamber for deposition of the inorganic particles on a single honeycomb body or multiple honeycomb bodies.

A pillar-shaped honeycomb structure, comprising an outer peripheral side wall; first cells having an opening on the first end surface and having a sealing portion on the second end surface; and second cells adjacent to the first cells with partition walls interposed therebetween and having a sealing portion on the first end surface and having an opening on the second end surface; wherein the outer peripheral side wall, the partition walls, and the sealing portions are fired, and comprise cordierite as a main component and one or more sintering aids selected from ceria, zirconia, and titania; wherein in the partition walls, assuming an average porosity of a portion in a range A, and a portion in a range B is P1 (%); and assuming an average porosity of a portion in a range C is P2 (%), −4≤P1−P2≤7 is satisfied.

The invention provides a catalyst composition, including a mixture of catalytically active particles and a magnetic material, such as superparamagnetic iron oxide nanoparticles, capable of inductive heating in response to an applied alternating electromagnetic field. The catalytically active particles will typically include a base metal, platinum group metal, oxide of base metal or platinum group metal, or combination thereof, and will be adapted for use in various catalytic systems, such as diesel oxidation catalysts, catalyzed soot filters, lean NOx traps, selective catalytic reduction catalysts, ammonia oxidation catalysts, or three-way catalysts. The invention also includes a system and method for heating a catalyst material, which includes a catalyst article that includes the catalyst composition and a conductor for receiving current and generating an alternating electromagnetic field in response thereto, the conductor positioned such that the generated alternating electromagnetic field is applied to at least a portion of the magnetic material.

A system includes a controller for an exhaust aftertreatment system including a SCR catalyst in exhaust gas-receiving communication with an engine and at least one reductant dosing system structured to provide reductant to the exhaust gas. The controller is structured to determine a ratio of NO to NO2 at or proximate an inlet of the SCR catalyst. The controller is further structured to command the at least one reductant dosing system to increase, decrease, or maintain an amount of reductant provided to the exhaust gas based on comparing the ratio of NO to NO2 to a previous NO to NO2 ratio.

A support structure (1) for an exhaust gas aftertreatment unit, at least comprising an at least partially encircling frame (2) which predefines a plane (3), a plurality of spoke elements (4) at least partially connected to the frame (2) and having a course in the plane (3), wherein at least one spoke element (4) is configured with a plurality of elevations (6) transverse to the plane (3), and at least one stiffening element (5) which at least partially follows the course of the spoke element (4) and is connected to the spoke element (4) in the region of at least one elevation (6) of the plurality of elevations (6).

The method includes: preparing a base material having a wall flow structure, including a first cell with an opening only at an first end, a second cell with an opening only at a second end, and a porous partition partitioning the first cell and the second cell; supplying a catalyst layer forming material to the first end and applying the catalyst layer forming material to an inside of the partition from the first end up to a predetermined length along the extension direction of the partition such that an uncoated portion where the second end is not coated with the catalyst layer forming material in a range facing the first cell of the partition in the extension direction of the partition is formed, and ventilating from the second end and drying the applied catalyst layer forming material.

To provide a production method for a mold suppressing generation of crack or melting defect generated in a honeycomb filter through heat impact by partial exothermic heat and acute temperature change in exhaust gas without increasing pressure loss and for a honeycomb molding.SOLUTION: A mold to form a honeycomb molding for a honeycomb segment with an outer peripheral wall thicker than a partition wall through extrusion is provided with a mold body and a guide ring attached on an outer peripheral side of the mold body. The mold body comprises: a first surface where a cray supply hole opens; a second surface placed opposite to the first surface, where grate slits in communication with the cray supply hole opens; and a third surface positioned at an opposite side of the first surface and at an outer periphery of the second surface, the second surface constitutes an area forming a grid-like partition wall in a honeycomb body, the third surface constitutes an outer peripheral area forming the outer peripheral wall, the second surface is higher than the third surface by a step part H, and the guide ring has a gap between the third surface and itself and an opening with an enough size to cover the outer peripheral side part of the outer peripheral area.SELECTED DRAWING: Figure 7(b)

An oxidation catalyst article comprises a flow-through honeycomb substrate having an inlet end and an outlet end and a longitudinal length extending therebetween and comprising an array of channels each defined by a channel wall, a first washcoat extending from the inlet end up to 40% of the longitudinal length of the substrate and comprising a first platinum group metal composition on a first alumina support, the first washcoat having a total combined loading of Pt and Pd of X g / L (gft-3), a second washcoat extending from the inlet end up to 85% of the longitudinal length of the substrate and entirely overlapping the first washcoat, the second washcoat comprising a second platinum group metal composition on a second alumina support, the second washcoat having a total combined loading of Pt and Pd of Y g / L (gft-3); and a third washcoat extending from the outlet end comprising a third platinum group metal composition wherein the third platinum group metal composition is platinum only or both platinum and palladium on a third alumina support, the third washcoat having a total platinum group metal loading of Z g / L (gft-3); wherein 2Z<X>1.5Y, and wherein the third washcoat does not overlap the first washcoat.

Exhaust gas purification device (100), comprising: a substrate (10) comprising an upstream end (I) through which an exhaust gas is introduced into the device and a downstream end (J) through which the exhaust gas is discharged from the device, wherein the substrate (10) has a length Ls between the upstream end (I) and the downstream end (J); a first catalyst layer (20) containing palladium particles, which extends over a first region (X) and is in contact with the substrate (10), wherein the first region (X) extends between the upstream end (I) and a first position (P), wherein the first position (P) is located at a first distance La from the upstream end (I) in the direction of the downstream end (J); a second catalyst layer (30) containing rhodium particles, which extends over a second region (Y) and is in contact with the substrate (10), wherein the second region (Y) extends between the downstream end (J) and a second position (Q), the second position (Q) being located at a second distance Lb from the downstream end (J) in the direction of the upstream end (I); and a third catalyst layer (40) containing rhodium particles, which extends over a third region (Z) and is in contact with at least the first catalyst layer (20), wherein the third region (Z) extends between the upstream end (I) and a third position (R), wherein the third position (R) is located at a third distance Lc from the upstream end (I) in the direction of the downstream end (J), wherein a mean particle size distribution of the rhodium particles contained in the second catalyst layer (30) and the third catalyst layer (40) is from 1.0 nm to 2.0 nm, and a standard deviation of the particle size distribution of the rhodium particles contained in the second catalyst layer (30) and the third catalyst layer (40) is 0.8 nm or less.

The present application provides a honeycomb ceramic carrier, a preparation method thereof, and a catalytic body containing the honeycomb ceramic carrier, the honeycomb ceramic carrier comprising: a body; a plurality of compartments with hollow structures in the body, the compartments penetrating through the body to form a honeycomb structure; wherein the compartments have a quadrilateral cross section, one pair of opposite angles of the quadrilateral cross section has an inner recess or a chamfer, and the other pair of opposite angles of the quadrilateral cross section does not have an inner recess or a chamfer. The present application improves the structural strength of the ceramic carrier for carrying catalysts, and reduces the bending phenomenon of the partition wall of the thin-walled ceramic carrier with a honeycomb structure without increasing the degree of mold wear, thereby improving the yield.

The invention relates to an exhaust gas purification component (1), comprising at least a honeycomb structure (2) extending along an axial direction (3) between an inlet side (4) and an outlet side (5) and allowing exhaust gas (6) to flow through it along the axial direction (3), and a sleeve (7) extending around the honeycomb structure (2) along a circumferential direction (8) extending transversely to the axial direction (3) with a fastening section (9) and a connection section (10); wherein the sleeve (7) is connected to the honeycomb structure (2) in the fastening section (9) via an inner circumferential surface (11) at least force-fit;wherein the connection section (10) extends from the fastening section (9) towards the inlet side (4) and is arranged along a radial direction (12) extending transversely to the axial direction (3) and transversely to the circumferential direction (8) at a distance (13) from the honeycomb body structure (2).

A particulate filter, a gasoline engine emission treatment system comprising the particulate filter and a method for treating an exhaust from a gasoline engine, wherein the particulate filter comprises: a substrate, comprising a plurality of porous walls extending longitudinally to form a plurality of parallel channels extending from an inlet end to an outlet end, wherein a quantity of the channels are inlet channels that are open at the inlet end and closed at the outlet end, and a quantity of channels are outlet channels that are closed at the inlet end and open at the outlet end; an in-wall TWC coating in the inlet channels and the outlet channels, comprising a platinum group metal component, an alumina-based refractory metal oxide and an oxygen storage component, wherein the in-wall TWC coating has a weight ratio of the alumina-based refractory metal oxide to the oxygen storage component in the range of 1:20 to 1:3, and wherein the in-wall TWC coating is free of any individual zirconium species and barium species; and optionally, an on-wall layer of inorganic particles in the inlet channels and / or outlet channels, wherein the inorganic particles comprise one or more non-PGM components selected from alumina, zirconia, ceria, silica, titania, magnesium oxide, manganese oxide, zinc oxide, rare earth metal oxide other than ceria, or any composite oxides thereof.

The present invention discloses a crystalline aluminosilicate small-pore zeolite having a maximum ring size of eight tetrahedral atoms, wherein the zeolite comprises copper, wherein the Cu: Al atomic ratio is between 0.12 and 0.55; and manganese, wherein the Mn: Cu atomic ratio is between 0.05 and 0.95; and a metal M, wherein M is selected from magnesium, calcium, barium, strontium, yttrium, titanium, zirconium, niobium, iron, zinc, silver, lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium and mixtures thereof, and wherein the M: Cu atomic ratio is between 0.05 and 0.80; and wherein the sum of the atomic ratios of copper, manganese and the metal M to aluminum, (Cu+Mn+M): Al, is between 0.20 and 0.80; and wherein the zeolite comprises at least 2.5 wt.-% of copper, calculated as CuO and based on the total weight of the zeolite. Catalyst substrate monoliths comprising the crystalline aluminosilicate zeolite are also disclosed. These catalyst substrate monoliths can be used in a process for the removal of nitrogen oxides from combustion exhaust gases, and they can be part of emissions treatment systems.

The present invention relates to a particulate filter comprising: a substrate comprising a plurality of longitudinally extending porous walls to form a plurality of parallel channels extending from an inlet end to an outlet end wherein a number of channels are inlet channels open at the inlet end and closed at the outlet end, a certain number of channels are outlet channels which are closed at the inlet ends and open at the outlet ends; and a layer of inorganic particles supported on the surface of the porous wall in the inlet channel and / or the outlet channel, in which the inorganic particles comprise or consist of boehmite particles. The invention also relates to a method for producing a particulate filter comprising applying inorganic particles comprising or consisting of boehmite particles in the inlet channel and / or the outlet channel of the substrate.

A pillar shaped honeycomb structure, including: an outer peripheral wall; and porous partition walls disposed inside the outer peripheral wall, the partition walls defining a plurality of cells, each of the cells penetrating from one end face to other end face to form a flow path, wherein one or both of the one end face and the other end face includes a groove portion; and wherein at least one annular conductive loop containing a conductive material is embedded in the groove portion.

The present invention relates to a zeolite comprising zinc and platinum, and to a catalyst containing said zeolites.

The present invention relates to a particulate filter, which comprises a substrate comprising a plurality of porous walls extending longitudinally to form a plurality of parallel channels extending from an inlet end to an outlet end, wherein a quantity of the channels are inlet channels that are open at the inlet end and closed at the outlet end, and a quantity of channels are outlet channels that are closed at the inlet end and open at the outlet end; and a layer of inorganic particles loaded on surfaces of porous walls in the inlet channels and / or outlet channels, wherein the inorganic particles comprise or consist of boehmite particles. The present invention also relates to a method for producing a particulate filter which includes applying inorganic particles comprising or consisting of boehmite particles in inlet channels and / or outlet channels of a substrate.

A honeycomb filter includes: a honeycomb substrate having porous partition walls disposed so as to surround cells extending from an inflow end face to an outflow end face, an outer peripheral coating layer disposed so as to surround an outer periphery of the honeycomb substrate, and plugging portions that are disposed at any one of ends on the inflow end face and ends on the outflow end face, of the cells, wherein, the outer peripheral coating layer has an inflection point at which thermal expansion in thermal expansion behavior of the outer peripheral coating layer turns to contraction and a temperature T1 of which is 1000 to 1500° C., and the outer peripheral coating layer has a porosity P1 of 36 to 48%, and a thermal expansion coefficient C1 between 40 to 800° C. of 2.5 to 3.5×10−6 / ° C.

The present invention provides an exhaust gas purification catalyst including a base material and a catalyst layer 20 that is arranged on the base material. The catalyst layer 20 includes a catalyst metal and a carrying material carrying the catalyst metal. The catalyst layer 20 satisfies below: (1) in a pore distribution curve measured by a mercury porosimeter, a peak for the largest pore volume exists within a range of a pore diameter equal to or more than 1 µm and not more than 10 µm; and (2) on an electron microscopy observation image (with a 1000-fold magnification) of a surface of the catalyst layer 20, when areas of a plurality of voids comprised in the electron microscopy observation image are respectively calculated, a standard deviation for the areas of the plurality of voids is not more than 30 µm2.

Disclosed is an exhaust gas purification apparatus for purifying exhaust gas emitted from an engine and discharges the exhaust gas to an outside, the apparatus including: a body formed with an opening area in which one area is opened; an intake part disposed on one side of the body through which the exhaust gas is introduced; a filter disposed inside the body and capable of entry and exit through the opening area; a body cover capable of covering the opening area; a selective reduction catalyst disposed with the body to reduce nitrogen oxides contained in exhaust gas passing through the filter; and a discharge part through which exhaust gas having passed through the selective reduction catalyst is discharged.

To provide a production method for a mold suppressing generation of crack or melting defect generated in a honeycomb filter through heat impact by partial exothermic heat and acute temperature change in exhaust gas without increasing pressure loss and for a honeycomb molding.SOLUTION: A mold to form a honeycomb molding for a honeycomb segment with an outer peripheral wall thicker than a partition wall through extrusion is provided with a mold body and a guide ring attached on an outer peripheral side of the mold body. The mold body comprises: a first surface where a cray supply hole opens; a second surface placed opposite to the first surface, where grate slits in communication with the cray supply hole opens; and a third surface positioned at an opposite side of the first surface and at an outer periphery of the second surface, the second surface constitutes an area forming a grid-like partition wall in a honeycomb body, the third surface constitutes an outer peripheral area forming the outer peripheral wall, the second surface is higher than the third surface by a step part H, and the guide ring has a gap between the third surface and itself and an opening with an enough size to cover the outer peripheral side part of the outer peripheral area.SELECTED DRAWING: Figure 7(b)

A method for producing a porous ceramic structure, comprising the following: a) Making kneaded clay by kneading a raw material; b) Obtaining a pressed body by shaping the kneaded clay and c) Firing of the pressed body, wherein the raw material contains the following: Cordierite; Cer and iron and / or manganese and / or cobalt, wherein the process c) forms a porous ceramic structure comprising a porous structural body formed essentially of cordierite, cerium-containing particles firmly attached to the structural body, and metal oxide particles each firmly attached to an inside of a pore in the structural body, wherein the metal oxide particles are particles of an oxide having a spinel structure containing iron and / or manganese and / or cobalt, The process c) includes the following: c1) Raising the temperature of the pressed body to a first temperature that is less than or equal to a liquid phase formation temperature; c2) Increasing the temperature of the pressed body from the first temperature to a second temperature that is higher than the liquid phase formation temperature and lower than a crystallization temperature of the metal oxide particles; c3) Increasing the temperature of the pressed body from the second temperature to a third temperature which is greater than the crystallization temperature and less than or equal to a maximum temperature; and c4) Maintaining the temperature of the press body at the maximum temperature for a specified period of time, and wherein a rate of temperature increase in process c2) in the range of 100 °C / h to 200 °C / h.

A washcoat slurry comprising a platinum group metal (PGM), an oxygen storage capacity (OSC) material, an inorganic oxide support, a polyacrylate, and a solventis disclosed. A method for the manufacture of a catalytic gasoline particulate filter for the treatment of an exhaust gas comprising coating a wall-flow filter substrate with the washcoat slurry is disclosed.

The present invention relates to an adapter assembly (10a; 10b; 10c; 10d; 10e; 10f) for conducting electric current in a gas-tight manner into a gas container (11), wherein the gas container (11) comprises a protruding current connection terminal (12) which extends from an inner cavity (40) of the gas container (11) through an outer surface (13) of the gas container (11) for conducting electric current into the gas container (11), and the adapter assembly comprises: a housing (14) for at least partially surrounding the current connection terminal (12) in a circumferential direction of the current connection terminal (12), wherein the housing (14) comprises a cover (15) comprising a through hole (16) for the current connection terminal (12) to pass through the housing (14) in a contactless manner; and a housing (14) for fixing the housing (14) in a gas-tight manner to the gas container. The present invention also relates to a component assembly (100) comprising a gas container (11) and an adapter assembly (10a; 10b; 10c; 10d; 10e; 10f) according to the present invention fixed thereon.