JPH0448934A - Metal honeycomb catalyst - Google Patents
Metal honeycomb catalystInfo
- Publication number
- JPH0448934A JPH0448934A JP2156488A JP15648890A JPH0448934A JP H0448934 A JPH0448934 A JP H0448934A JP 2156488 A JP2156488 A JP 2156488A JP 15648890 A JP15648890 A JP 15648890A JP H0448934 A JPH0448934 A JP H0448934A
- Authority
- JP
- Japan
- Prior art keywords
- peripheral parts
- large number
- parts
- catalyst
- inner peripheral
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003054 catalyst Substances 0.000 title claims abstract description 36
- 239000002184 metal Substances 0.000 title claims abstract description 28
- 230000002093 peripheral effect Effects 0.000 abstract description 14
- 230000000694 effects Effects 0.000 abstract description 13
- 239000004071 soot Substances 0.000 abstract description 11
- 238000006555 catalytic reaction Methods 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 5
- 230000005855 radiation Effects 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 238000004804 winding Methods 0.000 description 5
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
- F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
- F01N3/2807—Metal other than sintered metal
- F01N3/281—Metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates
- F01N3/2821—Metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates the support being provided with means to enhance the mixing process inside the converter, e.g. sheets, plates or foils with protrusions or projections to create turbulence
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2330/00—Structure of catalyst support or particle filter
- F01N2330/02—Metallic plates or honeycombs, e.g. superposed or rolled-up corrugated or otherwise deformed sheet metal
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2330/00—Structure of catalyst support or particle filter
- F01N2330/30—Honeycomb supports characterised by their structural details
- F01N2330/38—Honeycomb supports characterised by their structural details flow channels with means to enhance flow mixing,(e.g. protrusions or projections)
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Catalysts (AREA)
Abstract
Description
【発明の詳細な説明】
(産業上の利用分野)
この発明はメタルハニカム触媒、特にディーゼルエンジ
ンの排気浄化のために用いられるものに関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a metal honeycomb catalyst, particularly one used for exhaust purification of a diesel engine.
(従来の技術)
メタルハニカム触媒は、薄肉状の壁を隔てて互いに平行
にのびる多数のセルを金属薄板で形成し、壁表面に触媒
をコーティングしたものである。(Prior Art) A metal honeycomb catalyst is one in which a large number of cells extending in parallel to each other are formed with thin metal plates, and the wall surfaces are coated with a catalyst.
ディーゼルエンジンでは、このメタルハニカム触媒が排
気通路に設けられ、エンジンからの排気が各セルに導か
れると、排気中の有機可溶成分(以下「5OFJという
)が壁表面の触媒と反応して燃焼される(特開昭63
36841、同63−36843、特開平1−5301
1号公報参照)。In diesel engines, this metal honeycomb catalyst is installed in the exhaust passage, and when the exhaust from the engine is guided to each cell, the organic soluble components in the exhaust (hereinafter referred to as "5OFJ") react with the catalyst on the wall surface and burn. (Unexamined Japanese Patent Publication No. 1983)
36841, 63-36843, JP-A-1-5301
(See Publication No. 1).
(発明が解決しようとするam>
ディーゼルエンジンでは、ガソリンエンジンに比べて排
気温度が相対的に俄<(たとえばガソリンエンジンでは
300〜850℃1こもなるのに対し、テ゛イーゼルエ
ンジンでは150〜700℃の温度範囲にしかならない
)、かつガソリンエンジンと相違して排出ガス成分の中
にパーティキュレー)<1気微粒子)を含んでいる。(Am to be solved by the invention) In a diesel engine, the exhaust temperature is relatively low compared to a gasoline engine. However, unlike gasoline engines, the exhaust gas components include particulates (particulates).
このパーティキュレートは、ドライスート(カ−ボン)
と5OF(大部分を未燃燃料成分が占める)とからなり
、SOFは比較的低温(たとえば200℃程度)からで
も触媒反応によって容易に燃焼するのに対し、ドライス
ートは触媒を用いでいても比較的^温(たとえば400
℃以上)でないと燃焼せず、かつ燃焼反応速度が遅いた
め触媒に付着させた状態でなければ燃焼させることがで
きない。This particulate is dry soot (carbon)
and 5OF (mostly unburned fuel components). SOF is easily combusted by a catalytic reaction even at relatively low temperatures (e.g. around 200°C), whereas dry soot is combusted even when a catalyst is not used. Relatively warm (for example 400
℃ or higher), it will not burn, and the combustion reaction rate is slow, so it cannot be burned unless it is attached to a catalyst.
このため、従来のハニカム触媒では、ドライスートを低
減することに対してはほとんど効果がなかりた。For this reason, conventional honeycomb catalysts have little effect on reducing dry soot.
この発明はこのような従来の課題に着目してなされたも
ので、メタルハニカム触媒であっても、多少はドライス
ートを付着させて捕集することにより、パーティキュレ
ートの低減効果を高めるようにした装置を提供すること
を目的とする。This invention was made by focusing on such conventional problems, and even with metal honeycomb catalysts, the particulate reduction effect is enhanced by attaching and collecting some dry soot. The purpose is to provide equipment.
(課題を解決するための手段)
NS1の発明は、薄肉状の壁を隔てて互いに平行にのび
る多数のセルを金属薄板で形成し、前記壁表面に触媒を
コーティングした/タルノ)ニカム触媒において、前記
壁表面に小さな凹部を多数設けた。(Means for Solving the Problems) The invention of NS1 is a nicum catalyst in which a large number of cells extending parallel to each other with thin walls are formed of thin metal plates, and a catalyst is coated on the surface of the walls. A large number of small recesses were provided on the wall surface.
第2の発明は、薄肉状の壁を隔てて互−に平行にのびる
多数のセルを金属薄板で形成し、前記壁表面に触媒をコ
ーティングしたメタルハニカム触媒において、前記壁表
面に小さな凹部を多数設けるとともに、外周部の単位体
積あたりのセル数が中心部より多くなるようにした。The second invention is a metal honeycomb catalyst in which a large number of cells extending in parallel to each other are formed with thin metal plates, and the wall surface is coated with a catalyst, in which a large number of small recesses are formed on the wall surface. At the same time, the number of cells per unit volume at the outer periphery is larger than that at the center.
(作用)
各発明では、壁表面に小さな凹部が存在すると、ガス流
れがこの凹部にて乱されるため、この凹部に衝突する小
さなガス流れが生じ、ガス中のドライスートがこの凹部
に付着捕4sされる。(Function) In each invention, when a small recess exists on the wall surface, the gas flow is disturbed by the recess, so a small gas flow collides with the recess, and dry soot in the gas adheres to and is trapped by the recess. 4s will be given.
第2の発明では、ガスは内周部を多く流れて、触媒反応
効果を高める。単位体積あたりのセル数の多い外周部で
は、ガスと触媒との接触効率が高くなる。In the second invention, a large amount of gas flows through the inner peripheral portion to enhance the catalytic reaction effect. In the outer periphery where the number of cells per unit volume is large, the efficiency of contact between the gas and the catalyst is high.
(実施例)
第1図は第1の発明の一実施例のメタlレノ)ニカム触
媒の外観である。(Example) FIG. 1 shows the external appearance of a metal nicom catalyst according to an example of the first invention.
メタルハニカム触W1では、薄肉状の壁を隔てて互いに
平行にのびる多数のセル2が金属薄板で形成されている
。In the metal honeycomb structure W1, a large number of cells 2 are formed of thin metal plates and extend parallel to each other across thin walls.
各セル2を隔てる壁の表面には、第2図に示すように、
PO部5が多数形成される。なお、第2図は第1図のA
部拡大図である。As shown in FIG. 2, on the surface of the wall separating each cell 2,
A large number of PO sections 5 are formed. Note that Figure 2 is A of Figure 1.
It is an enlarged view of the part.
この凹部5の1つをさらに拡大してtItJ3図に示す
と、図で矢印方向が上流側であり、上流側からのガス流
れに直交する平面6と、この面6に向かって」流体側か
ら徐々に深くなる曲面7とから凹部5が形成されている
。凹部はこれに限られるものでなく、要は上流からのガ
ス流れを乱すものであればよく、第5図とff16図の
ように平面だけであるいは曲面だけで形成した凹部8,
9でもかまわない。When one of these recesses 5 is further enlarged and shown in Figure tItJ3, the direction of the arrow in the figure is the upstream side, and there is a plane 6 perpendicular to the gas flow from the upstream side, and a plane 6 toward this plane 6 from the fluid side. A recess 5 is formed by a curved surface 7 that gradually becomes deeper. The concave portion is not limited to this, but may be anything that disturbs the gas flow from upstream, and the concave portion 8 formed only with a flat surface or only a curved surface as shown in FIGS. 5 and ff16,
It doesn't matter if it's 9.
第1図に示したメタルハニカム触媒1は、次のようにし
て形成する。The metal honeycomb catalyst 1 shown in FIG. 1 is formed as follows.
第2図に示すように、金属製の平板3と波板4を準備し
て、tIS3図で示したl’!!]部5にちょうどはま
るような小突起をローラ表面に多数設けた圧縮ローラで
加工することにより、小さな凹部5を平板3と波板4の
両表面に多数設ける。各部材3゜4の材質はたとえばス
テンレススチールに近い材質である。As shown in FIG. 2, a metal flat plate 3 and a corrugated plate 4 are prepared, and l'! ! ] A large number of small recesses 5 are provided on both surfaces of the flat plate 3 and the corrugated plate 4 by processing with a compression roller having a large number of small protrusions on the roller surface that fit into the portions 5. The material of each member 3 and 4 is, for example, a material close to stainless steel.
次に、これら部材3,4を重ねて第4図で示すように、
内周から多重巻きにすることで、ff11図に示したメ
タルハニカム触媒1ができあがる。その後、凹部5を有
する平板3と波板4の表面に触媒をコーティングする。Next, these members 3 and 4 are stacked together as shown in FIG.
The metal honeycomb catalyst 1 shown in Fig. ff11 is completed by multiple winding from the inner circumference. Thereafter, the surfaces of the flat plate 3 and the corrugated plate 4 having the recesses 5 are coated with a catalyst.
なお、第4図に示した多重巻きにする方法自体は公知で
ある。この方法によれば、中心から外周まで各層の間隔
が等しく、波板4も中心の巻き始め端から外周の巻き終
わり端までほぼ均一な大きさで形成されるため、形状の
自由度が^くなる。The method of multiple winding shown in FIG. 4 is well known. According to this method, the spacing between each layer is equal from the center to the outer periphery, and the corrugated sheet 4 is formed with a substantially uniform size from the winding start end at the center to the winding end end at the outer periphery, so there is a high degree of freedom in shape. Become.
ここで、この例の作用を説明する。Here, the operation of this example will be explained.
凹部のない平板と波板を多重巻!にする方法で形成され
たメタルハニカム触媒では、セルに導かれた排気がセル
入口よりセル出口へと素通りするため、ドライスートは
ほとんど付着されることがない。Multiple winding of flat plate and corrugated plate without recesses! In the metal honeycomb catalyst formed by this method, the exhaust gas introduced into the cells passes directly from the cell inlet to the cell outlet, so that almost no dry soot is deposited.
これに対して、この例のように、平板3と波板4から構
成される壁表面に、小さな凹部5が形成されると、ガス
流れが乱されこの凹部5に衝突する小さなガス流れが多
数小てくる。このため、ガス中のドライスートが凹部5
に付着して捕集されることになり、ドライスートがある
程度は捕集される。On the other hand, if a small recess 5 is formed in the wall surface composed of a flat plate 3 and a corrugated plate 4 as in this example, the gas flow is disturbed and many small gas flows collide with the recess 5. It's getting smaller. Therefore, the dry soot in the gas is absorbed into the recess 5.
The dry soot will be collected to some extent.
また、凹部5がある分だけがスとの接触面積が増すと、
ガスと触媒の接触効率も高くなるので、SOFだけでな
く、HCやCOについても燃焼することができる。Also, if the contact area with the base increases due to the presence of the recess 5,
Since the contact efficiency between the gas and the catalyst is also increased, not only SOF but also HC and CO can be combusted.
つまり、この例によれば、ある程度はドライスートを付
着捕集することができるばかりか、全体としてパーティ
キュレートを低減する効果が向上するのである。In other words, according to this example, not only can dry soot be adhered and collected to some extent, but the effect of reducing particulates as a whole can be improved.
第7図はpIS2の発明の一実施例のメタルハニカム触
媒11の縦断面図で、この例は多重に巻かれた各層の間
隔と波の大きさの両方を内周部13で大きく、外周部1
2で小さくすることによって、外周部12の単位面積あ
たりのセル数が、内周部13よりも多くなるようにvI
ld!tシたものである。FIG. 7 is a longitudinal cross-sectional view of a metal honeycomb catalyst 11 according to an embodiment of the invention of pIS2. 1
2, so that the number of cells per unit area in the outer peripheral part 12 is larger than that in the inner peripheral part 13.
ld! It's something like that.
これは、放熱により外周部12は内周部13よりも排気
温度が低くなるため、外周部12での触媒反応効果が内
周部よりも低下することを考直したもので、がスは内周
部13を多く流れて、触媒反応効果を高める。また、外
周部12でもがスと触媒との接触効率が高くなるため、
触媒反応が内周部と同じ程度に進む。This was done in consideration of the fact that the exhaust gas temperature in the outer circumference 12 is lower than that in the inner circumference 13 due to heat radiation, so the catalytic reaction effect in the outer circumference 12 is lower than that in the inner circumference. A large amount of water flows through the peripheral portion 13 to enhance the catalytic reaction effect. In addition, since the contact efficiency between the gas and the catalyst is increased in the outer peripheral portion 12,
The catalytic reaction proceeds to the same extent as in the inner periphery.
この結果、全体としての触媒反応効果が向上するので、
先の実施例よりもさらにパーティキュレートを低減する
ことができる。As a result, the overall catalytic reaction effect improves, so
Particulates can be further reduced than in the previous embodiment.
最後に、!#2図では平板3と波板4の両方、しかも両
面に凹部5を設けているが、片方だけあるいは片面だけ
とすることもできる。lastly,! In Figure #2, the recesses 5 are provided on both the flat plate 3 and the corrugated plate 4, and also on both sides, but they may be provided only on one side or only on one side.
(発明の効果)
第1の発明では、壁表面に小さな凹部を多数設けたため
、ある程度はドライスートを付着捕集することができる
ぽかりか、全体としてパーティキュレートを低減する効
果が向上する。(Effects of the Invention) In the first invention, since a large number of small recesses are provided on the wall surface, the dry soot can be attached and collected to some extent, and the effect of reducing particulates as a whole is improved.
¥S2の発明では、さらに外周部の単位体積あたりのセ
ル数が中心部より多くなるようにしたため、全体として
の触媒反応効果が向上する。In the invention of ¥S2, the number of cells per unit volume in the outer periphery is larger than that in the center, so that the overall catalytic reaction effect is improved.
第1図はWSlの発明の一実施例のメタルハニカム触媒
の斜視図、第2図は11111図のA部拡大図、IJS
3図はこの実施例の凹部拡大図、第4図はこの実施例の
メタルハニカム触媒の形成方法を説明するための斜視図
、第5図と第6図は他の実施例の凹部拡大図、第7図は
第2の発明の一実施例のメタルハニカム触媒の縦断面図
である。
1・・・メタルハニカム触媒、2・・・セル、3・・・
平板、4・・・波板、5・・・凹部、6・・・平面、7
・・・曲面、8゜9・・・凹部、11・・・メタルハニ
カム触媒、12・・・外周部、13・・・内周部。
第5図
第4図
16図
第
図Figure 1 is a perspective view of a metal honeycomb catalyst according to an embodiment of WSL's invention, Figure 2 is an enlarged view of part A of Figure 11111, and IJS
3 is an enlarged view of the recess of this example, FIG. 4 is a perspective view for explaining the method of forming the metal honeycomb catalyst of this example, and FIGS. 5 and 6 are enlarged views of the recess of other examples. FIG. 7 is a longitudinal sectional view of a metal honeycomb catalyst according to an embodiment of the second invention. 1...Metal honeycomb catalyst, 2...Cell, 3...
Flat plate, 4... Corrugated plate, 5... Concave portion, 6... Plane, 7
...Curved surface, 8°9...Concave portion, 11...Metal honeycomb catalyst, 12...Outer periphery, 13...Inner periphery. Figure 5 Figure 4 Figure 16 Figure
Claims (2)
ルを金属薄板で形成し、前記壁表面に触媒をコーティン
グしたメタルハニカム触媒において、前記壁表面に小さ
な凹部を多数設けたことを特徴とするメタルハニカム触
媒。1. A metal honeycomb catalyst in which a large number of cells extending parallel to each other across thin walls are formed of thin metal plates, and the wall surface is coated with a catalyst, characterized in that the wall surface is provided with a large number of small recesses. honeycomb catalyst.
ルを金属薄板で形成し、前記壁表面に触媒をコーティン
グしたメタルハニカム触媒において、前記壁表面に小さ
な凹部を多数設けるとともに、外周部の単位体積あたり
のセル数が中心部より多くなるようにしたことを特徴と
するメタルハニカム触媒。2. In a metal honeycomb catalyst, in which a large number of cells extending parallel to each other are formed by thin metal plates separated by thin walls, and the wall surface is coated with a catalyst, a large number of small recesses are provided on the wall surface, and the unit volume of the outer periphery is A metal honeycomb catalyst characterized by having more cells in each area than in the center.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2156488A JPH0448934A (en) | 1990-06-14 | 1990-06-14 | Metal honeycomb catalyst |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2156488A JPH0448934A (en) | 1990-06-14 | 1990-06-14 | Metal honeycomb catalyst |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0448934A true JPH0448934A (en) | 1992-02-18 |
Family
ID=15628853
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2156488A Pending JPH0448934A (en) | 1990-06-14 | 1990-06-14 | Metal honeycomb catalyst |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0448934A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2419212A2 (en) * | 2009-04-17 | 2012-02-22 | BASF Corporation | Multi-zoned catalyst compositions |
JP2017217641A (en) * | 2016-06-10 | 2017-12-14 | 株式会社キャタラー | Catalyst for exhaust gas purification |
-
1990
- 1990-06-14 JP JP2156488A patent/JPH0448934A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2419212A2 (en) * | 2009-04-17 | 2012-02-22 | BASF Corporation | Multi-zoned catalyst compositions |
JP2012523957A (en) * | 2009-04-17 | 2012-10-11 | ビー・エイ・エス・エフ、コーポレーション | Multi-zone catalyst composition |
EP2419212A4 (en) * | 2009-04-17 | 2014-06-18 | Basf Corp | Multi-zoned catalyst compositions |
JP2017217641A (en) * | 2016-06-10 | 2017-12-14 | 株式会社キャタラー | Catalyst for exhaust gas purification |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0643799B1 (en) | Muffler with catalytic converter arrangement | |
US8257659B2 (en) | Prevention of face-plugging on aftertreatment devices in exhaust | |
EP0687806B1 (en) | A metal carrier for a catalytic converter | |
JP3336035B2 (en) | Metal honeycomb carrier | |
US20050217258A1 (en) | Exhaust gas filter and method for cleaning an exhaust gas | |
US7282185B2 (en) | Emission control apparatus | |
US20070122319A1 (en) | Particulate filter | |
EP1697621B1 (en) | Apparatus for purifying exhaust gas | |
EP1541952A1 (en) | Heat exchanger, and reactor and radiation heater using the heat exchanger | |
WO2000039437A1 (en) | A converter for use in the treatment of gases | |
US5314665A (en) | Catalytic converter | |
JPH0448934A (en) | Metal honeycomb catalyst | |
JPS6318123A (en) | Catalytic converter | |
JP5474962B2 (en) | Filter device for reducing vehicle smoke | |
WO2008038444A1 (en) | Metallic catalyst support | |
JPH04342819A (en) | Catalyst carrier for internal combustion engine | |
CN100422516C (en) | Converter for exhaust gases of internal combustion engines | |
JPH0440240A (en) | Metal honeycomb catalyst | |
JPH061236Y2 (en) | Catalyst converter | |
JP3199936B2 (en) | Metal carrier | |
JPH08144752A (en) | Multistage catalyst converter | |
JPH0394836A (en) | Carrier for exhaust gas purifier | |
JPS62273049A (en) | Metal carrier of metal carrier catalyst | |
SU1346830A1 (en) | Noise silencer | |
JP2000179332A (en) | Heat-insulating metal carrier for purifying exhaust gas |