摘要:
The honeycomb catalyst body is equipped with a honeycomb structure body having partition walls that define a plurality of cells extending from a first end face as one of the end faces to a second end face as the other end face and serving as through channels of a fluid. The partition walls each have a base layer containing from 50 to 90 mass % of zeolite and a coat layer with which the surface of the base layer 11 is coated with a thickness of from 1 to 50 μm. The coat layer is either a coat layer (A) containing from 1 to 5 mass % vanadia and titania or a coat layer (B) containing from 1 to 5 mass % vanadia and a composite oxide of titania and tungsten oxide.
摘要:
There is disclosed a honeycomb structure onto which a large amount of catalyst can be carried while suppressing an increase in pressure drop. In a honeycomb structure comprising porous partition walls by which a plurality of cells that become through channels of a fluid are partitioned and in which a plurality of pores are formed. In each of the partition walls, pores having pore diameters larger than a thickness of the partition wall in a section thereof which is perpendicular to an extending direction of the cells are formed so as to occupy 4 to 11% of the total volume of the pores formed in the partition walls.
摘要:
There is disclosed a honeycomb catalyst body including porous partition walls in which a plurality of cells that become through channels of a fluid are defined and formed, and a plurality of pores are formed, wherein a cell density is from 93 to 186 cells/cm2, and onto the partition walls, a catalyst containing the zeolite is loaded in an amount of 100 to 300 g/L, a porosity (A) of the partition walls before the catalyst is loaded thereonto is 50% or more, and a porosity (B) of the partition walls in a state where the catalyst is loaded thereonto is from 0.3 to 0.6 times as much as the porosity (A).
摘要翻译:公开了一种蜂窝状催化剂体,其具有多孔分隔壁,在该多孔分隔壁中形成有通过流体通道形成的多个细胞,形成多个孔,其中细胞密度为93〜186个/ cm 2, 并且在分隔壁上装载含有沸石的催化剂的量为100〜300g / L,催化剂负载前的分隔壁的孔隙率(A)为50%以上,孔隙率(B )催化剂负载的状态下的分隔壁为孔隙率(A)的0.3〜0.6倍。
摘要:
A honeycomb structure including porous partition walls, a porosity of the partition walls is from 45 to 70%, and when pores having the maximum width in excess of 10 μm in a cross section of each of the partition walls are large pores and the partition wall is equally divided into three regions of a center region and surface layer regions present on both sides of the center region, a total area of cross sections of the large pores which appear in the surface layer regions is from 60 to 100% of a total area of cross sections of all the pores which appear in the surface layer regions, and a total area of cross sections of the large pores which appear in the center region is from 0 to 40% of the total area of cross sections of all the pores which appear in the center region.
摘要:
A honeycomb structure includes a pillar-shaped honeycomb structure body having a porous partition wall defining a plurality of cells serving as fluid through channels extending from a first end face to a second end face, and having a circumferential wall disposed so as to encompass the circumference of the partition wall, wherein a thickness of the partition wall is 50 to 132 μm, a porosity of the partition wall is 40 to 55%, an open frontal area of pores on the surface of the partition wall per unit surface area of the partition wall is 10 to 15%, and a percentage (S0˜10/Sall×100%) of the ratio of an opening area S0˜10 of the pores having an opening diameter of 10 μm or less to a total opening area Sall of the pores opened to the surface of the partition wall is 90% or more.
摘要:
A honeycomb catalytic body including: a honeycomb structure having porous partition walls, and a catalyst layer including a vanadium catalyst, wherein a cell density of the honeycomb structure is in a range of 8 cells to 48 cells per square centimeter, an amount of the vanadium catalyst to be loaded is in a range of 150 g/L to 400 g/L, and a catalyst charging ratio represented by Equation (1) mentioned below in a cut face of the honeycomb catalytic body is from 50% to 100%. the catalyst charging ratio (%)=(the sectional area of the catalyst layer loaded onto the partition wall inner portions)/(the sectional area of the pores before the catalyst is loaded)×100. Equation (1):
摘要:
A honeycomb structure has partition walls defining a plurality of polygonal cells which become through channels for a fluid, a structure end face vertical to an axial direction has at least two cell regions possessing mutually different cell structures and surrounded by circumferential portions, and in the cell regions adjacent to each other, to first partition walls of a first cell structure of one first cell region, second partition walls of a second cell structure of the other or second cell region are tilted.
摘要:
A honeycomb structure includes a pillar-shaped honeycomb structure body having a porous partition wall disposed to surround a plurality of cells, which serving as fluid through channels extending from a first end face to a second end face, wherein the plurality of cells includes: large opening cells having a large opening area on the first end face and the second end face; and small opening cells having an opening area smaller than that of the large opening cells on the first end face and the second end face, a ratio of an opening diameter of the large opening cells to an opening diameter of the small opening cells is larger than 1.11 and smaller than 1.28, and the opening diameter of the small opening cells is larger than 0.78 mm, and a cell density of the honeycomb structure body is larger than 93 pcs/cm2 and smaller than 104 pcs/cm2.
摘要:
An exhaust gas purifying device includes a first SCR catalyst converter, an oxidation catalyst converter, a filter section, and a second SCR catalyst converter arranged in series to a flow direction of an exhaust gas. The first SCR catalyst converter includes a pillar-shaped honeycomb structure a cell density of which is from 31 to 78 cells/cm2, a porosity of the partition walls of which is from 50 to 65%, and in which a first SCR catalyst is loaded onto the surfaces of the partition walls and inner portions of pores formed in the partition walls, and an amount of the first SCR catalyst to be loaded onto the surfaces of the partition walls and the inner portions of the pores is from 200 to 500 g/L and an amount of the first SCR catalyst to be loaded onto the inner portions of the pores is from 5 to 80 g/L.
摘要:
A honeycomb structure includes a honeycomb structure body that includes a porous partition wall which defines a plurality of cells serving as through channels of fluid and extending from an inflow end face as one end face to an outflow end face as the other end face, and a circumferential wall arranged on a circumferential surface of the honeycomb structure body. The circumferential wall has a thickness of 0.5 to 4.0 mm, a gap path is formed along a surface of the circumferential wall inside the circumferential wall, the gap path has a width of 0.4 to 4.0 mm, and has a height of 50 to 99% of the thickness of the circumferential wall, and a total length of the gap path is 1000% or more of a length in the cell extending direction of the honeycomb structure body.