摘要:
A honeycomb catalyst body includes a tubular honeycomb base material having porous partition walls to define and form a plurality of cells extending as through channels of a fluid from one end surface from which the fluid flows in to the other end surface from which the fluid flows out, and a catalyst loaded onto the partition walls. In the honeycomb base material, at least one slit which is open in a side surface of the honeycomb base material is formed, and a width of the slit is from 1.0 to 10.0 mm.
摘要:
A method for fabricating an exhaust gas decontamination reactor, which is an exhaust gas decontamination pipe or a exhaust gas decontamination honeycombed structure, comprises steps: respectively coating a cathode layer and an anode layer on an outer wall surface and an inner wall surface of a pipe; and forming an enclosed reducing environment inside an internal channel of the pipe. The method for fabricating an exhaust gas decontamination honeycombed structure comprises steps: respectively coating cathode layers and anode layers on first inner wall surfaces of first passages and second inner wall surfaces of second passages; and forming enclosed reducing environments inside the second passages. Then, the cathode layers function as reaction sites to decontaminate exhaust gas. The present invention needn't arrange a reducing-gas system in the reactor and thus can decrease the volume and fabrication cost thereof.
摘要:
A honeycomb structure includes a honeycomb structure part having porous partition walls which form a plurality of cells having a hexagonal cross-sectional shape and extending through the honeycomb structure part from an inflow end surface to an outflow end surface to become through channels of a fluid, and having an outer peripheral wall which is positioned at an outermost periphery. A porosity of the partition walls is from 35 to 60%, an average pore diameter of the partition walls is from 1 to 5 μm, and among the cells, incomplete cells which are the cells formed by the partition walls and the outer peripheral wall are plugged from the inflow end surface to the outflow end surface.
摘要:
A sealed honeycomb structure may include porous walls dividedly forming inlet cells and outlet cells extending from an end surface of an inlet side to an end surface of an outlet side, an outlet side sealing portion, and an inlet side sealing portion, wherein at least one outlet cell is a reinforced cell, where a reinforced part for reinforcing the outlet cell is formed at at least one corner portion at which the walls on a cross-section vertical to an extending direction of the cell cross each other, and wherein the inlet cell is a non-reinforced cell where the reinforced part is not formed at all the corner portions at which the walls on the cross-section vertical to the extending direction of the cell cross each other.
摘要:
A mixture of fused grains mainly comprising or composed of an oxide phase of pseudo-brookite type and comprising titanium, aluminum and magnesium, the fused grains having the following chemical composition, in weight percentages on the basis of the oxides: less than 55% of Al2O3; more than 30% and less than 70% of TiO2; more than 1% and less than 15% of MgO, the fused grains also corresponding to the following composition, in molar percentages and on the basis of the single oxides Al2O3, TiO2, MgO: 180≦3t+a≦220, a≦50, m=100−a−t, in which: a is the molar percentage of Al2O3; t is the molar percentage of TiO2; m is the molar percentage of MgO. A ceramic product obtained from such fused grains.
摘要:
An inlet face for an aftertreatment device that prevents and/or eliminates face-plugging for a passageway where the inlet face is disposed. The inlet face includes a particular end surface disposed on an outer surface at the end of a substrate. The end surface includes at least one of a three-dimensional topographical configuration disposed at the end of the substrate, a chemical coating applied on the end of the substrate, or both a three-dimensional topographical configuration disposed on the end of the substrate and a chemical coating applied on the three-dimensional topographical configuration. As one example, the inlet face can be helpful in preventing carbonaceous fouling, which can result from engine exhaust material, such as carbon soot and other engine exhaust by-products.
摘要:
A hydrocarbon trap is provided for reducing cold-start hydrocarbon emissions. The trap is formed by extruding from about 60 to 80% by weight zeolite and from about 20 to 40% by weight of a binder to form an extruded zeolite monolith. A three-way catalyst and an oxygen storage capacity material may also be included in the trap. The hydrocarbon trap contains from about 5.0 to 8.0 g/in.3 zeolite, which provides increased hydrocarbon retention. The hydrocarbon trap may be positioned in the exhaust gas passage of a vehicle such that hydrocarbons are adsorbed on the trap and stored until the monolith reaches a sufficient temperature for catalyst activation.
摘要:
There is provided a heat exchanger element and a heat exchanger which are smaller, lighter in weight, and lower in cost than conventional heat exchange bodies, heat exchangers and the like. In the honeycomb structure, t≧0.2, ρ>100, 20≦t×ρ≦250, and 10,000≦λ×ρ are satisfied when thermal conductivity of a material for the partition walls is taken as λ [W/K˜m], and, regarding a cell structure of the honeycomb structure, a wall thickness of the partition walls is taken as t [mm], and a cell density is taken as ρ [cells/sq.in.].
摘要:
There is disclosed a honeycomb structure including: a tubular honeycomb structure part having porous partition walls with which a plurality of cells are formed, and an outer peripheral wall; and a pair of electrode parts arranged on a side surface of the honeycomb structure part, an electrical resistivity of the honeycomb structure part is from 1 to 200 Ωcm, each of the pair of electrode parts is formed into a band-like shape extending in a direction in which the cells extend, in a cross section perpendicular to the extending direction of the cells, the one electrode part is disposed opposite to the other electrode part via the center of the honeycomb structure part, and a total of heat capacities of the pair of electrode parts is from 2 to 150% of a heat capacity of the whole outer peripheral wall.
摘要:
Fused particles containing, by weight percent: more than 15% but less than 55% of Al2O3; more than 20% but less than 45% of TiO2; more than 3% but less than 30% of SiO2; less than 20%, in total, of at least one oxide selected from the group consisting of ZrO2, Ce2O3, and HfO2; less than 1% of MgO; and more than 1% but less than 15%, in total, of at least one selected from the group consisting of CaO, Na2O, K2O, SrO, B2O3, and BaO. Also, a ceramic product or material obtained by sintering the fused particles.
摘要翻译:含有重量百分比的熔融颗粒:大于15%但小于55%的Al2O3; 超过20%但小于45%的TiO2; 超过3%但小于30%的SiO2; 总共少于20%,选自由ZrO 2,Ce 2 O 3和HfO 2组成的组中的至少一种氧化物; 小于1%的MgO; 以及从CaO,Na 2 O,K 2 O,SrO,B 2 O 3和BaO组成的组中选出的至少一种的总和大于1%但小于15%。 另外,通过烧结熔融颗粒得到的陶瓷制品或材料。