摘要:
A honeycomb structure includes a cylindrical honeycomb structure section having porous partition walls to define and form a plurality of cells, and an outer peripheral wall, and a pair of electrode sections disposed on a side surface of the honeycomb structure section. An electrical resistivity of the honeycomb structure section is from 1 to 200 Ωcm, and each of the pair of electrode sections is constituted of a laminated body of two or more electrode bodies. An area of the electrode body disposed closest to an outer peripheral wall side is larger than an area of the other electrode body, and in a cross section perpendicular to a cell extending direction, a center angle of the electrode body disposed closest to the outer peripheral wall side is larger than a center angle of the other electrode body.
摘要:
A ceramic honeycomb structure having a large number of flow paths partitioned by porous cell walls, the cell walls meeting the conditions; (a) the cell walls having porosity of 55-80%, (b) the cell walls having a median pore diameter D50 (measured by mercury porosimetry) of 5-27 μm, (c) pores open on cell wall surfaces having an opening area ratio of 20% or more, (d) pores open on cell wall surfaces having a median opening diameter d50 (determined from equivalent circle diameters on an area basis) of 10-45 μm, (e) the density of pores open on cell wall surfaces having equivalent circle diameters of 10 μm or more and less than 40 μm being 350/mm2 or more, (f) the maximum inclination of a curve of a cumulative pore volume relative to a pore diameter (determined from a pore distribution measured by mercury porosimetry) being 1.6 or more, and (g) a ratio D50/d50 of the median pore diameter D50 to the median opening diameter d50 being 0.65 or less.
摘要翻译:一种陶瓷蜂窝结构体,具有多孔细胞壁分隔的大量流路,细胞壁满足条件; (a)具有孔隙率为55-80%的孔壁,(b)具有5-27μm的中值孔径D50(通过水银孔率法测量)的孔壁,(c)在具有开口的孔壁表面上开孔 面积比为20%以上,(d)具有中值开口直径d50(根据面积的等效圆直径确定)的细胞壁表面开孔的孔径为10-45μm,(e)孔上开孔密度 等效圆直径为10μm以上且小于40μm的壁面为350 / mm 2以上,(f)累积孔体积相对于孔径的曲线的最大倾角(根据由孔径分布 水银孔率法)为1.6以上,(g)中值孔径D50与中值开口直径d50的比D50 / d50为0.65以下。
摘要:
There is provided a honeycomb structure 100 comprising partition walls 1 separating and forming a plurality of cells 2 functioning as fluid passages. The partition walls 1 are made of cordierite, and, when an average pore size of the partition walls 1 is x (μm) while a porosity of the partition walls 1 is y (%), a relation of x and y is y≦−8.33x+86.66 and satisfies 0.5≦x≦5 and 35≦y≦70. The honeycomb structure 100 can improve thermal shock resistance without sacrificing any of light-off performance, catalyst coatability, and strength.
摘要:
A honeycomb structure includes a honeycomb substrate having a porous partition wall that defines a plurality of cells that extend from an inlet end face as an inlet side for a fluid to an outlet end face as an outlet side for the fluid, and a porous circumferential wall that is monolithically formed with the partition wall, and a coat layer that is disposed on at least a part of the outer surface of the circumferential wall. Here, a part of the coat layer penetrates into the pores of the circumferential wall, and a thickness of the part of the coat layer that penetrates into the pores of the circumferential wall is from 1 to 90% of the thickness of the circumferential wall.
摘要:
Provide is a catalytic converter including a substrate which includes regions having different cell densities, in which exhaust gas purification performance is superior in all the regions of the substrate.A catalytic converter 10 includes catalyst layers in which a noble metal catalyst is supported on a support in surfaces of cell walls 2 of a substrate 1 having a cell structure in a longitudinal direction of the substrate 1 in which gas flows, in which the substrate 1 has a first region 1A having a relatively high cell density and a second region 1B having a relatively low cell density, and a ratio of a thickness of a catalyst layer 3A in the second region 1B to a thickness of a catalyst layer 3 in the first region 1A is in a range of more than 0.95 times and 1.2 times or less.
摘要:
A reverse flow hydrocarbon trap is provided that improves the conversion of hydrocarbons present in the exhaust gases of a vehicle to more environmentally benign compounds during cold engine starts. The trap includes a substrate having at least one exhaust gas passage therethrough, with the walls of the exhaust gas passage including a hydrocarbon trapping material and an oxidative catalyst. The substrate includes an inlet for hot exhaust gas from a vehicle engine and an outlet for the exhaust gas and further includes an inlet channel, an outlet channel, and an intermediate channel through which exhaust gas flows. The intermediate channel is oriented such that the flow of exhaust gas through the exhaust gas passage is reversed from the direction of flow in the inlet and outlet channels to improve the performance of the hydrocarbon trap.
摘要:
A modular exhaust system is disclosed for treating the exhaust from a fossil fuel powered prime mover; the exhaust system includes bricks, inserts placed inside of the bricks and funnels to direct exhaust through various flow paths in order to treat the exhaust.
摘要:
A NOx absorber catalyst comprising a substrate monolith coated with one or more washcoat layers and comprising a first component comprising a nitrogen oxide storage component, at least one precious metal and a dispersed rare earth oxide supported on a refractory support material, and a second component comprising a precious metal supported on a bulk reducible oxide that is substantially free of nitrogen oxide storage material, wherein the precious metal present in the second component comprises Pt, Pd or a combination of both Pt and Pd and wherein the bulk reducible oxide is an oxide, a composite oxide or a mixed oxide comprising at least one of manganese, iron, cobalt, copper, tin or cerium.
摘要:
In a method for cutting a honeycomb dried body, the honeycomb dried body is cut using a water jet. The honeycomb dried body is made by drying a honeycomb molded body including cell walls defining a plurality of cells.
摘要:
An oxidation catalyst for treating an exhaust gas from a diesel engine, which oxidation catalyst comprises: a first washcoat region comprising platinum (Pt), manganese (Mn) and a first support material; a second washcoat region comprising a platinum group metal (PGM) and a second support material; and a substrate having an inlet end and an outlet end; wherein the second washcoat region is arranged to contact the exhaust gas at the outlet end of the substrate and after contact of the exhaust gas with the first washcoat region.