328results about "Catalyst support" patented technology

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.

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.

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 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 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.

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.

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.

Catalyst unit (10) for an exhaust gas catalyst, in particular an SCR catalyst unit for an SCR exhaust gas catalyst of a marine diesel internal combustion engine, comprising several catalyst modules (11), wherein each catalyst module (11) has a ceramic catalyst body through which exhaust gas flows and a metallic housing (12) for the ceramic catalyst body, the respective ceramic catalyst body being received in the respective metallic housing (12) and partially surrounded by it. The catalyst modules (11) are positioned with their first flow-through ends on a support grid (13), with a counter-support (14) being positioned at the opposite second flow-through ends of the catalyst modules (11).The catalyst modules (11) are clamped between the support grid (13) and the counterholder (14), the counterholder (14) having several parallel counterholder struts (21) which engage a housing structure (27a) of an exhaust gas catalyst at a first end (22) and interact at opposite second ends (23) with a retainer strut (24) extending perpendicular to the counterholder struts (21). The counterholder struts (21) are connected at their second ends (23) to the retainer strut (24) via connecting means (25) extending in the axial direction of the counterholder struts (21) such that, as a result of the connection, the counterholder struts (21) press against structural elements (29) of the housing structure (27a) at their first ends (22).

Ceramic honeycomb bodies and methods for their manufacture are provided. The ceramic honeycomb body comprises a bulk density of less than 210 g / L, a geometric surface area (GSA) greater than 93 in−1 (3.66 mm−1), a mechanical integrity factor (MIF) greater than 0.28%, and a back pressure factor (BPF) greater than 0.4 mm2.

The present disclosure provides a method of forming a selective catalytic reduction (SCR) catalyst, the method comprising receiving a first iron-promoted zeolite having a first iron content and treating the iron-promoted zeolite with additional iron in an ion exchange step to form a second iron-promoted zeolite having a second iron content, the second iron content being higher than the first iron content. Also provided herein is a selective catalytic reduction (SCR) catalyst composition comprising an iron-promoted zeolite having at least about 6 weight percent iron, based on the total weight of the iron-promoted zeolite, wherein the iron content of the zeolite is added to the zeolite in at least two separate steps.

A method for the manufacture of a gasoline particulate filter (GPF) for the treatment of an exhaust gas is disclosed. The method comprises (i) forming a washcoat slurry; (ii) coating a wall-flow filter substrate with the washcoat slurry to form a washcoated substrate; and (iii) calcining the washcoated substrate to form a gasoline particulate filter. The washcoat slurry comprises (a) a platinum group metal selected from the group consisting of Pt, Pd, Rh and mixtures thereof; (b) an oxygen storage capacity (OSC) material; and (c) a C2-C6 aliphatic amino acid.

A washcoat slurry comprising a platinum group metal (PGM), an oxygen storage capacity (OSC) material, an inorganic oxide support, a polyacrylate, and a solvent is 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.

To provide a compression ignition internal combustion engine for a heavy-duty diesel vehicle provided with a composite oxidation catalyst capable of reducing or preventing catalyst contamination due to phosphorus and / or zinc and substantially maintaining durability for a longer period of time.SOLUTION: A composite oxidation catalyst included upstream of the soot filter substrate has a substrate 5 with length L and a first catalytic washcoat zone 1 with length LI<L where one end is defined by the inlet end I and the second end is defined by the first end 15 of the second catalytic washcoat zone 2 with length L2<L. The second end is defined by the outlet end O and extends in an axial direction from the inlet end I and comprises a washcoat coating layer G comprising particulate metallic oxides having a loading of greater than 48.8 g / l, wherein a total platinum group metal loading in the first catalyst washcoat zone is greater than a total platinum group metal loading in the second catalyst washcoat zone 2 and wherein the first catalyst washcoat zone comprises one or more alkaline earth metal components supported on the first refractory metal oxide support material.SELECTED DRAWING: Figure 1

The present invention relates to an ammonia oxidation catalyst for the treatment of an exhaust gas stream, the catalyst comprising a coating disposed on a substrate, wherein the coating comprises a selective catalytic reduction component being a zeolitic material comprising one or more of copper and iron; and an oxidation catalytic component comprising platinum supported on a porous non-zeolitic oxidic support, wherein the oxidation catalytic component further comprises a first oxidic material supported on the porous non-zeolitic oxidic support supporting platinum, wherein the first oxidic material comprises titania.

The invention relates to a method for manufacturing a particulate filter for use in exhaust applications. In particular, the invention relates to a so-called wall-flow filter substrate coated with a dry ceramic powder in the inlet region. A corresponding filter or an exhaust system comprising said filter and its use in an exhaust purification method are also disclosed.

An exhaust gas purification device configured to improve a purification efficiency by reducing the effect of the boundary film. The exhaust gas comprises a flow path in which the catalyst is formed at least on an inner surface, and the flow path includes an inner wall surface extending in a flowing direction of an exhaust gas. A length of the flow path in the flowing direction is set to a length calculated using the equationLe={dH / 9.28·√(ρ·u / μ)}2or shorter, where dH is a hydraulic diameter (m), ρ is a density (kg / m3) of the exhaust gas, u is a flow rate (m / s) of the exhaust gas, and μ is a viscosity (Pas) of the exhaust gas.

The present invention relates to catalyzed particulate filters, particularly for use in the emission treatment systems of internal combustion engines. Provided are catalyzed particulate filters, methods of making catalyzed particulate filters, and methods of using catalyzed particulate filters to control emissions in exhaust gases from internal combustion engines.

The invention is directed to the purification of exhaust gases of an internal combustion engine operated predominantly with a stoichiometric fuel mixture. The exhaust gas system has in particular 4 purification functions in a particular order. A three-way catalyst (TWC1) near the engine is followed by a gasoline particle filter (GPF) and another three-way catalyst (TWC2) downstream thereof. The system additionally includes a hydrocarbon storage function.

Honeycomb structure (100, 200, 300, 400), comprising a honeycomb structure body (4, 24, 44) with porous partitions (1, 21, 41) arranged to surround a plurality of cells (2, 22, 42) extending from a first end face (11, 31, 51) to a second end face (12, 52) and forming passage channels for a fluid, where a value of a porosity of the partition (1, 21, 41) in a partition part between the two cells (2, 22, 42) is defined as a porosity A, a porosity value of the partition wall (1, 21, 41) in a crossing part (15, 35), which is an area connecting two or more wall parts (16, 36), is defined as a porosity B, a value of A / B obtained by dividing porosity A by porosity B lies in a range of 0.5 to 0.95 and the porosity A lies in a range of 10 to 40%, the porosity B lies in a range of 20 to 37.2%, and the thickness of the partition walls (1, 21, 41) is in a range of 40 to 115 µm.

A filter unit structure according to an embodiment is a filter unit structure used in an exhaust gas reduction device and may include: a ceramic filter structure formed to filter a particulate material; a first electrical heating plate disposed on one side of the ceramic filter structure to generate heat; and a second electrical heating plate disposed on the other side of the ceramic filter structure to generate heat.

A pillar-shaped honeycomb structure including an outer peripheral side wall, and a plurality of partition walls disposed on an inner peripheral side of the outer peripheral side wall, the plurality of partition walls partitioning a plurality of cells forming flow paths from a first end surface to a second end surface, whereinan average pore diameter of the partition walls measured by a mercury porosimeter is 10 μm or less, andwhen a cross section of the plurality of partition walls is observed with an X-ray microscope and porosities (%) of each partition wall is measured in a thickness direction from one surface to the other surface of each partition wall, an average porosity of each partition wall is 40 to 70%, and a difference between a maximum value and a minimum value of the porosity of each partition wall is 11% or less.

Ceramic filter with a columnar honeycomb structure (100) comprising an outer circumferential side wall (102); a plurality of first cells (108) arranged on an inner circumferential side of the outer circumferential side wall (102), extending from a first end face (104) to a second end face (106), open at the first end face (104) and having closure sections (109) at the second end face (106); and a plurality of second cells (110) arranged on the inner circumferential side of the outer circumferential side wall (102), extending from the first end face (104) to the second end face (106), having closure sections (109) at the first end face (104) and being open at the second end face (106), wherein the plurality of first cells (108) and the plurality of second cells (110) are arranged alternately next to each other, with porous partitions (112) arranged between them;where, when viewing a plurality of pores of a surface of the partitions (112) with a laser microscope and plotting the equivalent circle diameter (µm) of each pore on the X-axis and the pore depth (µm) of each pore on the Y-axis on a two-dimensional coordinate system, the slope of the regression line (y / x) obtained by a least squares method in a range of 20 ≤ x ≤ 40 is 0 to 0.20, the average value of the pore depth of the plurality of pores is 2.5 µm to 5.0 µm, and the number density of the plurality of pores is 600 / mm; 2 up to 2450 / mm 2 amounts.

A washcoat slurry comprising a platinum group metal (PGM), an oxygen storage capacity (OSC) material, an inorganic oxide support, a polyacrylate, and a solvent is 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.