JP2004290785A - Catalyst carrier - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a catalyst carrier enhanced in durability and prevented from the clogging caused by a wash coat. <P>SOLUTION: In the catalyst carrier having a large number of carrier cells 4 continuously arranged thereto along a gas flowing direction P in an offset state by alternately laminating and arranging offset corrugated sheets 3 and flat sheets 2 so as to partition the carrier cells, each of the offset corrugated sheets 3 is constituted so that base parts 5, first oblique side parts 6a and 6b, top side parts 7a-7d and second oblique side parts 8a and 8b are repeatedly formed along the direction S crossing the gas flowing direction P at a right angle and this continuous pattern is continuously formed in the gas flowing direction P. The first and second oblique side parts 6a and 8b are offset at a predetermined interval in the gas flowing direction P so as to hold parts where only either one of them is not offset. By this offsetting, less dense carrier cells 4 and dense carrier cells 4 are arranged alternately repeatedly along the gas flowing direction P. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a catalyst carrier used in a catalytic converter for purifying harmful components contained in exhaust gas of an internal combustion engine.
[0002]
[Prior art]
Conventionally, a catalyst carrier as shown in FIGS. 10 to 12 has been known (see Patent Document 1). The catalyst carrier 50 is wound in a state where one end side of a strip-shaped flat plate 51 as shown in FIG. 11 and one end side of a strip-shaped offset corrugated plate 52 (also shown in FIG. 11) are overlapped, and is shown in FIG. It is formed in such a cylindrical shape. This catalyst carrier 50 has a substantially honeycomb structure with a flat plate 51 and an offset corrugated plate 52, and as shown in FIGS. 11 and 12, a large number of carrier cells 53 are three-dimensionally arranged in a gas flow direction P and a direction S orthogonal thereto. Is formed.
[0003]
As shown in FIG. 11, the flat plate 51 has a wave shape along a direction S orthogonal to the gas flow direction P, and the wave shape is a substantially sine wave having a smaller wave height relative to the offset wave plate 52. .
[0004]
As shown in FIGS. 11 and 12, the offset corrugated plate 52 has a bottom portion 54, first oblique portions 55a, 55b, top oblique portions 56a, 56b, and a second oblique portion 57a along a direction S orthogonal to the gas flow direction P. , 57b are repeatedly formed in that order, and both the first oblique sides 55a, 55b and the second oblique sides 57a, 57b are arranged at predetermined intervals in the gas flow direction P in the direction S orthogonal to the gas flow direction P. It is offset alternately. Due to this offset, the cut opening 58 is formed between the first oblique side 55a and the first oblique side 55b adjacent in the gas flow direction P and between the adjacent second oblique side 57a and the second oblique side 57b. , 59 are formed. Further, the carrier cells 53 are alternately offset at regular intervals along the gas flow direction P in the orthogonal direction S of the gas flow direction P by the offset of the first hypotenuse portions 55a and 55b and the second hypotenuse portions 57a and 57b. I have. The catalyst carrier 50 thus formed is subjected to a treatment for supporting a catalyst, and is installed in an exhaust gas flow path.
[0005]
In the above-described configuration, the exhaust gas passes through each carrier cell 53 in the catalyst carrier 50, and at this time, harmful components in the exhaust gas come into contact with the catalyst and are purified. Here, since the respective carrier cells 53 connected along the gas flow direction P are alternately offset in the direction S perpendicular to the gas flow direction P, the exhaust gas flows downstream from the carrier cell 53 adjacent thereto. When moving to the carrier cell 53, the gas flow is diffused, and the frequency of contact of the harmful components in the exhaust gas with the catalyst is increased. In this way, the catalyst purification rate is improved as compared with the case where the carrier cell 53 is not offset in the direction S perpendicular to the gas flow direction P.
[0006]
Further, a catalyst carrier using an offset corrugated plate having a similar configuration is also disclosed in, for example, Patent Document 2.
[0007]
Further, as another conventional catalyst carrier 60, there is one as shown in FIG. 13 (for example, see Patent Document 3). As shown in FIG. 13, the offset corrugated plate 60a of the catalyst carrier 60 has a bottom portion 61, first oblique portions 62a and 62b, top oblique portions 63a and 63b, and a second oblique side along a direction S orthogonal to the gas flow direction P. The portions 64a and 64b are repeatedly formed in this order, and both the first oblique portions 62a and 62b and the second oblique portions 64a and 64b are alternately arranged in the gas flow direction P at predetermined intervals in the gas flow direction P. In the orthogonal direction S, both are offset symmetrically about the axis L. Due to this offset, a cut opening 65 is provided between the first oblique side 62a and the first oblique side 62b adjacent in the gas flow direction P and between the adjacent second oblique side 64a and the second oblique side 64b. 66 are formed together. In addition, the carrier cells 67 that are continuous along the gas flow direction P due to the offset have a relatively low cell density (rough density) and a relatively high cell density (density) alternately and repeatedly arranged.
[0008]
The first oblique portions 62a, 62b, the top portions 63a, 63b, and the second oblique portions 64a, 64b are offset by a half pitch in the gas flow direction P with respect to the axis (center line) L. ing. Due to this offset, each carrier cell 67 is formed in an obliquely inclined space.
[0009]
[Patent Document 1]
JP-A-6-63418, page 1, FIG.
[0010]
[Patent Document 2]
JP-A-6-198197, page 1, FIG.
[0011]
[Patent Document 3]
JP-A-2001-96170, page 1, FIG.
[0012]
[Problems to be solved by the invention]
However, in the conventional catalyst carrier 50 shown in FIG. 11, the connecting portions of the offset corrugated plates 52 forming the carrier cells 53 adjacent to each other in the gas flow direction P are connected only by the top portions 56a and 56b. Then, as shown in FIGS. 11 and 12, the connection width W1 of the top sides 56a, 56b depends on the offset amount of the first oblique sides 55a, 55b and the second oblique sides 57a, 57b. , 59 are inversely proportional to the width D1. That is, when the offset amount of the first oblique portions 55a and 55b and the second oblique portions 57a and 57b is increased, the width D1 of the cut opening increases, but the connection width W1 of the top edges 56a and 56b decreases and the structure As a result, there is a problem in durability. On the other hand, when the offset amount of the first oblique portions 55a and 55b and the second oblique portions 57a and 57b is reduced, the connection width W1 of the top portions 56a and 56b increases, but the width D1 of the cut openings 58 and 59 decreases. Therefore, there is a problem that the cut openings 58 and 59 are clogged during the catalyst coating.
[0013]
In the conventional catalyst carrier 60 shown in FIG. 13, the first oblique portions 62a and 62b, the top portions 63a and 63b, and the second oblique portions 64a and 64b have the gas flow direction P at the right and left portions with respect to the center line L. Therefore, the strength as a structure is higher than that of the catalyst carrier 50 shown in FIG. That is, as shown in FIG. 13, the location of the offset corrugated plate 60 a forming the carrier cell 67 adjacent to the gas flow direction P is the top portion adjacent to the gas flow direction P similarly to the catalyst carrier 50 shown in FIG. 11. In addition to 63a and 63b, they are connected on the center line L by the top sides 63a and 63b, so that the strength is improved. However, if a sufficient offset amount is secured for the relatively low-density carrier cells 67 so as not to cause clogging at the time of catalyst coating, clogging occurs at relatively high-density carrier cells 67 at the time of catalyst coating. When the offset amount is increased with a relatively high-density carrier cell 67 in order to avoid this, the relatively low-density carrier cell 67 becomes too large, and sufficient catalytic performance cannot be obtained.
[0014]
Accordingly, an object of the present invention is to provide a high-performance catalyst carrier capable of improving durability and preventing the catalyst from being clogged by a wash coat.
[0015]
[Means for Solving the Problems]
According to the first aspect of the present invention, there is provided a catalyst in which an offset corrugated plate and a flat plate are alternately stacked, and a large number of carrier cells are continuously arranged along the gas flow direction P and arranged in an offset state by these partitions. A carrier, wherein the offset corrugated plate has a bottom portion, a first oblique side portion, a top side portion, and a second oblique side portion repeatedly formed in this order along a direction S orthogonal to the gas flow direction P; Are formed continuously in the gas flow direction P, and the first oblique side portion and the second oblique side portion are disposed at predetermined intervals in the gas flow direction P with a non-offset portion interposed therebetween. Only the carrier cells having a relatively low cell density and the carrier cells having a relatively high cell density alternate along the gas flow direction P due to this offset. Characterized in that it is repeatedly arranged.
[0016]
The invention according to claim 2 is the catalyst support according to claim 1, wherein the width dimension W1 of the top side portion of the carrier cell having a relatively high cell density is the top side of the carrier cell having a relatively low cell density. The width W2 of the portion is set within a range of 0.2 ≦ (W1 / W2) <1.
[0017]
A third aspect of the present invention is the catalyst carrier according to the second aspect, wherein W1: W2 = 1: 2 is set.
[0018]
The invention according to claim 4 is the catalyst carrier according to any one of claims 1 to 3, wherein the first hypotenuse portion and the second hypotenuse portion alternate with each other. It is characterized by being offset.
[0019]
According to a fifth aspect of the present invention, there is provided the catalyst carrier according to any one of the first to third aspects, wherein the first oblique side portion and the second oblique side portion are continuously offset. And the other is successively arranged at an offset position, and by repeating this pattern, two or more are alternately offset from each other.
[0020]
【The invention's effect】
According to the first aspect of the present invention, the connecting portions of the offset corrugated plates forming the carrier cells having a relatively low cell density and the carrier cells having a relatively high cell density which are adjacent to each other in the gas flow direction P are connected to both top sides The connection is made at the width of the top part with a relatively high cell density at the part, and at least one of the first hypotenuse part and the second hypotenuse part is connected continuously, so it is structurally strong and has excellent durability ing. Further, even if the offset amount of the first oblique side and the second oblique side is increased, the connection width between the top sides is the same, so that the width of the cut opening can be made a predetermined width or more without substantially reducing the strength. . Therefore, according to the first aspect of the present invention, both improvement of durability and prevention of clogging due to wash coating of the catalyst can be realized.
[0021]
According to the second aspect of the invention, similarly to the first aspect of the invention, both improvement in durability and prevention of clogging can be realized.
[0022]
According to the third aspect of the present invention, in addition to the effect of the first aspect of the present invention, since the cut opening is set wide, even in the case of a high cell density of 500 cpsi, a wash coat is applied. The cut openings are not clogged.
[0023]
According to the fourth aspect, in addition to the effects of the first to third aspects, the exhaust gas can be efficiently diffused.
[0024]
According to the fifth aspect of the present invention, in addition to the effects of the first to third aspects, one of the first oblique side and the second oblique side is continuous over at least four carrier cells. , The durability can be further improved.
[0025]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, details of the catalyst carrier according to the present invention will be described based on embodiments shown in the drawings.
[0026]
(First Embodiment)
1 to 6 show a first embodiment of a catalyst carrier according to the present invention. FIG. 1 is a perspective view of the catalyst carrier, FIG. 2 is an enlarged perspective view showing an internal structure of the catalyst carrier, and is a partly expanded view of part A of FIG. 1, and FIG. 4 is a front view of the offset corrugated sheet, FIG. 5 is a cross-sectional view of B1, B2, B3, and B4 cross sections of FIG. 3 arranged from the top in the orthogonal direction S of the gas flow direction P, and FIG. It is a top view.
[0027]
As shown in FIG. 1, the catalyst carrier 1 </ b> A is formed in a columnar shape by winding the strip-shaped flat plate 2 and the strip-shaped offset corrugated plate 3 in a state where one end sides thereof are overlapped. As shown in FIG. 2, the flat plates 2 and the offset corrugated plates 3 are arranged alternately stacked, and a large number of carrier cells 4 are divided by the adjacent flat plates 2 and offset corrugated plates 3 so that the gas flow directions P and It is formed three-dimensionally in the orthogonal direction S. The contact portion between the adjacent flat plate 2 and the offset corrugated plate 3 is joined by diffusion bonding or the like.
[0028]
As shown in detail in FIGS. 3 and 4, the offset corrugated plate 3 has a bottom portion 5, first oblique portions 6 a, 6 b, top portions 7 a, 7 b, 7 c, 7 d along a direction S perpendicular to the gas flow direction P. The second oblique sides 8a and 8b are repeatedly formed in this order. The continuous pattern of the bottom portion 5, the oblique portions 6a, 6b, the top portions 7a, 7b, 7c, 7d and the oblique portions 8a, 8b is formed continuously along the gas flow direction P and the first oblique side. The portion 6a and the second oblique portion 8b are alternately offset on one side in a direction S orthogonal to the gas flow direction P with a portion that is not offset along the gas flow direction P interposed therebetween.
[0029]
The details will be described with reference to FIG. The first to fourth patterns of the carrier cells 4 described below are denoted by reference numerals 4a, 4b, 4c, and 4d, respectively, for clarity only in FIG. As shown in FIG. 5, the carrier cell 4a of the first pattern formed by the first oblique side 6a, the top side 7a, and the second oblique side 8a, the first oblique side 6b, the top side 7b, and the second oblique side 8a. Carrier cell 4b of the second pattern formed by the above, carrier cell 4c of the third pattern formed by the first oblique part 6b, the top part 7c, and the second oblique part 8b, the first oblique part 6b, the top part 7d And the fourth pattern of carrier cells 4d formed by the second hypotenuses 8a are repeatedly formed in this order along the gas flow direction P.
[0030]
The offset corrugated sheet 3 has a portion between a portion where a first pattern of carrier cells 4a are formed and a portion where a second pattern of carrier cells 4b are formed, and a portion where a fourth pattern of carrier cells 4d are formed and a first portion. A notch opening 9 is formed between the portion where the carrier cell 4a of the pattern is formed and the offset d of the first oblique sides 6a and 6b. On the other hand, since the second oblique side 8a side is continuous, no cut opening is formed. Further, the offset corrugated sheet 3 has a portion between a portion where the second pattern carrier cells 4b are formed and a portion where the third pattern carrier cells 4c are formed, and a portion where the third pattern carrier cells 4c are formed. The cut opening 10 is formed between the position where the carrier cell 4d of the fourth pattern is formed and the offset d of the second oblique portions 8a and 8b, but the first oblique portion 6b side is formed in the same manner as described above. Since it is continuous, no slit opening is formed.
[0031]
Then, the carrier cells 4a, 4b, 4c, and 4d of the respective patterns adjacent to each other in the gas flow direction P are formed in an offset state with respect to each other. Patterns and third patterns) and dense carrier cells 4b and 4d (second and fourth patterns) are alternately and repeatedly arranged. In addition, four rows of carrier cells adjacent to each other in the direction S orthogonal to the gas flow direction P are arranged so that the coarse and dense arrangements are opposite to each other.
[0032]
Each width dimension of the top sides 7a, 7b, 7c, 7d depends on each offset amount d of the first oblique sides 6a, 6b and the second oblique sides 8a, 8b. The width W1 of the tops 7b and 7d is within the range of 0.2 ≦ (W1 / W2) <1 with respect to the width W2 of the tops 7a and 7c of the coarse carrier cells 4a and 4c. Is set. In this embodiment, W1: W2 = 1: 2 is set.
[0033]
A treatment for supporting the catalyst is performed on the inner wall surface of each carrier cell 4 of the catalyst carrier 1A thus formed.
[0034]
In the above configuration, the exhaust gas passes through each of the carrier cells 4 (4a to 4d in FIG. 5) in the catalyst carrier 1A, and at this time, harmful components in the exhaust gas come into contact with the catalyst and are purified. Here, due to the offset arrangement of the offset corrugated plate 3 and the close-packed arrangement of the carrier cells 4 (4a to 4d in FIG. 5), the exhaust gas is transferred from the carrier cells 4 (4a to 4d in FIG. 5) to the downstream carrier cells adjacent thereto. 4 (4a-4d in FIG. 5), the gas flow is effectively diffused. As a result, the frequency of contact of the harmful components in the exhaust gas with the catalyst is increased, and excellent exhaust gas purification is performed.
[0035]
In the catalyst carrier 1A, the connecting portions of the offset corrugated plates 3 forming the coarse carrier cells 4a and 4c and the dense carrier cells 4b and 4d adjacent to each other in the gas flow direction P are located on both top portions. At the locations 7a, 7b, 7c, 7d, connection is made with the dense top sides 7b, 7d at a width W1 and at least one of the first oblique side 6b and the second oblique side 8a is continuously connected. It is structurally strong and has excellent durability. Further, even if the offset d of the first oblique sides 6a, 6b and the second oblique sides 8a, 8b is increased, the connection width between the top sides 7a, 7b, 7c, 7d is the same, so that the strength is almost reduced. The width of the cut openings 9 and 10 can be set to a predetermined width or more without the need. As described above, both improvement in durability and prevention of clogging by the wash coat can be realized.
[0036]
In the first embodiment, the ratio of the width W1 of the top sides 7b, 7d of the dense carrier cells 4b, 4d to the width W2 of the top sides 7a, 7c of the coarse carrier cells 4a, 4c is Since W1: W2 = 1: 2 is set, the cut openings 9 and 10 are set wide. Therefore, even in the case of a high-density cell having a cell density of 500 cpsi, it is possible to prevent the cut openings 9 and 10 from being clogged when the wash coat is applied.
[0037]
In the first embodiment, the first oblique portions 6a and the second oblique portions 8b are alternately offset from each other alternately, so that the exhaust gas can be efficiently diffused.
[0038]
(Second embodiment)
7 to 9 show a second embodiment of the present invention, FIG. 7 is a plan view of an offset corrugated plate, and FIG. 8 is a cross-sectional view taken along line C1, C2, C3, and C4 in FIG. FIG. 9 is a cross-sectional view in which the cross sections D1, D2, D3, and D4 of FIG. 7 are aligned in the orthogonal direction S of the gas flow direction P in order from the top.
[0039]
As shown in FIGS. 7 to 9, in the offset corrugated sheet 11 of the second embodiment, similarly to the above-described first embodiment, the first oblique portion 6 a and the second oblique portion 8 b are formed of gas. One side is alternately offset in the orthogonal direction S of the gas flow direction P at every other side with a portion not offset along the flow direction P interposed therebetween. That is, one of the first hypotenuse portion 6a and the second hypotenuse portion 8b is arranged at the offset position two consecutively, and then the other is arranged at the offset position two consecutively. Every third is alternately offset.
[0040]
Further, details thereof will be described with reference to FIGS. The following first to eighth pattern carrier cells 4 are denoted by reference numerals 4a, 4b, 4c, 4d, 4e, 4f, 4g, and 4h for clarification. As shown in FIGS. 8 and 9, a first pattern of carrier cells 4a formed by the first oblique side 6a, the top side 7a, and the second oblique side 8a, the first oblique side 6b, the top side 7b, the second A second pattern of carrier cells 4b formed by the hypotenuse portion 8a, a third pattern of carrier cells 4c formed by the first hypotenuse portion 6a, the top side portion 7c, and the second hypotenuse portion 8a, and the first hypotenuse portion 6b. A fourth pattern of carrier cells 4d formed by the top side 7d and the second oblique side 8a, a fifth pattern of carrier cells 4e formed by the first oblique side 6b, the top side 7e, and the second oblique side 8b; A sixth pattern of carrier cells 4f formed by the first oblique side 6b, the top side 7f, and the second oblique side 8a, and a seventh pattern formed by the first oblique side 6b, the top side 7g, and the second oblique side 8b. Carrier cell 4g and the first hypotenuse b, top portion 7h, the carrier cell 4h eighth patterns are formed repeatedly in this order along the gas flow direction P formed by the second oblique side portion 8a.
[0041]
The offset corrugated plate 11 has a portion between the portion where the first pattern carrier cells 4a are formed and the portion where the second pattern carrier cells 4b are formed, and a portion where the second pattern carrier cells 4b are formed and the third portion. Between the position where the carrier cell 4c of the pattern is formed, the position where the carrier cell 4c of the third pattern is formed and the position where the carrier cell 4d of the fourth pattern is formed, and the carrier cell 4h of the eighth pattern. A notch opening (not shown) is formed between the location to be formed and the location to form the first pattern carrier cells 4a by offsetting the first oblique sides 6a, 6b. On the other hand, since the second oblique side 8a side is continuous, no cut opening is formed. Further, between the position where the fourth pattern carrier cell 4d is formed and the position where the fifth pattern carrier cell 4e is formed, the position where the fifth pattern carrier cell 4e is formed and the sixth pattern carrier cell 4f are formed. And between the location where the sixth pattern carrier cells 4f are formed and the location where the seventh pattern carrier cells 4g are formed, and between the location where the seventh pattern carrier cells 4g are formed and the second location. A cut opening (not shown) is formed by offsetting the second hypotenuses 8a and 8b between the locations where the eight patterns of the carrier cells 4h are formed. In the same manner as described above, the first hypotenuse 6b is formed. Since the sides are continuous, no cut openings are formed.
[0042]
Other configurations are the same as those of the above-described first embodiment, and a description thereof will not be repeated.
[0043]
Also in the case of the second embodiment, the offset forming the coarse carrier cells 4a, 4c, 4e, and 4g and the dense carrier cells 4b, 4d, 4f, and 4h adjacent to each other in the gas flow direction P. The connecting portions of the corrugated sheet 11 are connected at the adjacent top portions 7a to 7h with high-density top portions 7b, 7d, 7f, and 7h in width W1, and the first oblique portion 6b and the second oblique portion 8a. Since any one of the parts is continuously connected, it is structurally strong and has excellent durability. Even if the offset amounts of the first oblique portions 6a and 6b and the second oblique portions 8a and 8b are increased, the connection widths between the top portions 7a to 7h are the same, so that the cut opening portions hardly decrease in strength. (Not shown) can be made a predetermined width or more. As described above, both improvement in durability and prevention of clogging by the wash coat can be realized.
[0044]
In the above-described second embodiment, the first hypotenuse portion 6a and the second hypotenuse portion 8b are alternately offset from each other alternately, so that the first hypotenuse portion 6b and the second hypotenuse portion 8a are offset from each other. Either one is continuously arranged over the portion of the four carrier cells (four consecutive ones of 4a to 4h). Therefore, the durability can be further improved. The first hypotenuse portion 6a and the second hypotenuse portion 8b may be alternately arranged at intervals of three or more.
[0045]
Further, in the first and second embodiments described above, the flat plate 2 is applied as a flat plate, but may have a minute wave shape. In the present invention, the flat plate 2 includes one having a slight wavy shape.
[0046]
Furthermore, in the above-described first and second embodiments, the flat plate 2 and the offset corrugated plates 3 and 11 are wound into a cylindrical shape in a state where one end sides thereof are overlapped. It can also be formed by alternately bending in an S-shape with one end sides of 3 and 11 overlapped, and various manufacturing procedures can be adopted.
[Brief description of the drawings]
FIG. 1 is a perspective view of a catalyst carrier according to a first embodiment of the present invention.
FIG. 2 is an enlarged perspective view of the internal structure of the catalyst carrier according to the first embodiment of the present invention, in which part A of FIG. 1 is developed.
FIG. 3 is a partial perspective view of the offset corrugated sheet showing the first embodiment of the present invention.
FIG. 4 is a front view of the offset corrugated plate showing the first embodiment of the present invention.
5 is a cross-sectional view showing the first embodiment of the present invention, in which cross sections B1, B2, B3, and B4 of FIG. 3 are arranged in order from the top in the direction perpendicular to the gas flow direction.
FIG. 6 is a plan view of the offset corrugated plate showing the first embodiment of the present invention.
FIG. 7 is a plan view of an offset corrugated plate according to a second embodiment of the present invention.
8 shows a second embodiment of the present invention, and is a cross-sectional view in which the cross sections C1, C2, C3, and C4 of FIG. 7 are arranged in order from the top in the direction orthogonal to the gas flow direction.
9 shows a second embodiment of the present invention, and is a cross-sectional view in which cross sections D1, D2, D3, and D4 of FIG. 7 are arranged in order from the top in the direction orthogonal to the gas flow direction.
FIG. 10 is a perspective view of a conventional catalyst carrier.
FIG. 11 is a perspective view of the internal structure of a conventional catalyst carrier.
FIG. 12 is a front view of a conventional offset corrugated sheet.
FIG. 13 is a perspective view of a conventional offset corrugated sheet.
[Explanation of symbols]
1A Catalyst carrier 2 Flat plate 3, 11 Offset corrugated plate 4, 4a-4h Carrier cells 6a, 6b First oblique side 7a-7h Top side 8a, 8b Second oblique side P Gas flow direction S Direction perpendicular to gas flow direction

Claims (5)

The offset corrugated plates (3), (11) and the flat plate (2) are alternately stacked and arranged, and a large number of carrier cells (4) are continuous along the gas flow direction (P) by these partitions, and A catalyst carrier (1A) arranged in an offset state,
The offset corrugated plates (3) and (11) are arranged along a direction (S) orthogonal to the gas flow direction (P), such as a bottom portion (5), a first oblique portion (6a), (6b), and a top portion (7a). ) To (7d) and the second oblique sides (8a) and (8b) are repeatedly formed in this order, and the continuous pattern is formed continuously in the gas flow direction (P), and The hypotenuse portion (6a) and the second hypotenuse portion (8b) are arranged at predetermined intervals in the gas flow direction (P) with a non-offset portion interposed therebetween, and only one of them is orthogonal to the gas flow direction (P). The carrier cells (4) having a relatively low cell density and the carrier cells (4) having a relatively high cell density are alternately arranged along the gas flow direction (P) by the offset. A catalyst carrier (1A) characterized in that: The catalyst carrier (1A) according to claim 1, wherein
The width dimension W1 of the top edges (7b) and (7d) of the carrier cells (4) having a relatively high cell density is equal to the width (W1) of the top edges (7a) and (7a) of the carrier cells (4) having a relatively low cell density. The catalyst carrier (1A), characterized in that the ratio is set within a range of 0.2 ≦ (W1 / W2) <1 with respect to the width dimension W2 of 7c). The catalyst carrier (1A) according to claim 2, wherein
A catalyst carrier (1A), wherein W1: W2 = 1: 2 is set. The catalyst carrier (1A) according to any one of claims 1 to 3, wherein
The catalyst carrier (1A), wherein the first hypotenuse (6a) and the second hypotenuse (8b) are alternately offset from each other. The catalyst carrier (1A) according to any one of claims 1 to 3, wherein
One of the first oblique side (6a) and the second oblique side (8b) is continuously arranged at an offset position, and the other is continuously arranged at an offset position. A catalyst carrier (1A), which is alternately offset every time.

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