JPH0451867Y2 - - Google Patents
Info
- Publication number
- JPH0451867Y2 JPH0451867Y2 JP14507887U JP14507887U JPH0451867Y2 JP H0451867 Y2 JPH0451867 Y2 JP H0451867Y2 JP 14507887 U JP14507887 U JP 14507887U JP 14507887 U JP14507887 U JP 14507887U JP H0451867 Y2 JPH0451867 Y2 JP H0451867Y2
- Authority
- JP
- Japan
- Prior art keywords
- carrier
- metal
- catalyst
- alumina
- exhaust gas
- 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.)
- Expired
Links
- 229910052751 metal Inorganic materials 0.000 claims description 73
- 239000002184 metal Substances 0.000 claims description 73
- 239000003054 catalyst Substances 0.000 claims description 56
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 39
- 238000000746 purification Methods 0.000 claims description 16
- 239000010410 layer Substances 0.000 description 20
- 239000000919 ceramic Substances 0.000 description 10
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 10
- 239000000463 material Substances 0.000 description 8
- 238000004804 winding Methods 0.000 description 8
- 239000011247 coating layer Substances 0.000 description 6
- 238000005338 heat storage Methods 0.000 description 6
- 239000002002 slurry Substances 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 229910052697 platinum Inorganic materials 0.000 description 5
- 229910052703 rhodium Inorganic materials 0.000 description 4
- 239000010948 rhodium Substances 0.000 description 4
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 4
- 238000007664 blowing Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910001593 boehmite Inorganic materials 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical compound O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- CLSUSRZJUQMOHH-UHFFFAOYSA-L platinum dichloride Chemical compound Cl[Pt]Cl CLSUSRZJUQMOHH-UHFFFAOYSA-L 0.000 description 1
- SONJTKJMTWTJCT-UHFFFAOYSA-K rhodium(iii) chloride Chemical compound [Cl-].[Cl-].[Cl-].[Rh+3] SONJTKJMTWTJCT-UHFFFAOYSA-K 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Catalysts (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
本考案は、内燃機関等から排出される排気ガス
の浄化用触媒を担持する排気ガス浄化用触媒担体
の改良に関するものである。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an improvement of an exhaust gas purifying catalyst carrier supporting a catalyst for purifying exhaust gas discharged from an internal combustion engine or the like.
（従来技術）
従来、排気ガス浄化用触媒の担体として、例え
ば特開昭56−85514号公報に示されるように、金
属製波板と金属製平板とを一体に積層させてなる
金属製担体をロール状に巻くことによりハニカム
状筒体を形成するとともに、上記金属製担体の表
面にアルミナコート層を形成し、このアルミナコ
ート層に白金、ロジウム等の触媒成分を含浸させ
るようにしたものが知られている。上記金属製担
体を使用した触媒では、セラミツク製担体を使用
したものに比べて板厚を小さくすることにより、
開口面積を大きく形成できるという利点がある。
しかし、アルミナコート層を形成する際に、上記
金属製波板と金属製平板との接合部にアルミナコ
ート材が集積し易いコーナ部が形成され、このコ
ーナ部のコート層が厚くなるとともに、これに応
じてコーナ部以外の平面部分のコート層が薄くな
る傾向がある。このため、上記アルミナコート層
に触媒成分を含浸させる際に、アルミナコート層
の薄い平面部分における触媒成分の密度が高くな
り、相近接した触媒成分の粒子が結合して粗大化
するシンタリング現象が生じ、これに伴ない触媒
成分の表面積が減少して、触媒活性が低下すると
いう問題があつた。(Prior art) Conventionally, as a carrier for an exhaust gas purifying catalyst, a metal carrier made by laminating a metal corrugated plate and a metal flat plate integrally has been used, for example, as shown in JP-A-56-85514. It is known that a honeycomb-shaped cylinder is formed by winding it into a roll, and an alumina coat layer is formed on the surface of the metal carrier, and this alumina coat layer is impregnated with a catalyst component such as platinum or rhodium. It is being In the catalyst using the metal carrier mentioned above, by making the plate thickness smaller than that using the ceramic carrier,
This has the advantage that a large opening area can be formed.
However, when forming the alumina coat layer, a corner part where the alumina coat material tends to accumulate is formed at the joint between the metal corrugated plate and the metal flat plate, and the coat layer at this corner part becomes thicker. There is a tendency for the coating layer to become thinner in flat areas other than corner areas. Therefore, when the alumina coat layer is impregnated with the catalyst component, the density of the catalyst component increases in the thin plane part of the alumina coat layer, and a sintering phenomenon occurs in which adjacent catalyst component particles combine and become coarse. This caused a problem in that the surface area of the catalyst component decreased and the catalyst activity decreased.
（考案の目的）
本考案は上記の問題点を解決するためになされ
たものであり、アルミナコート層の厚みが不均一
になるのを防止し、このアルミナコート層に含浸
される触媒成分の密度が部分的に高くなるのを防
止することができる排気ガス浄化用触媒担体を提
供するものである。(Purpose of the invention) The present invention was made to solve the above problems, and it prevents the thickness of the alumina coating layer from becoming uneven and improves the density of the catalyst component impregnated into the alumina coating layer. An object of the present invention is to provide a catalyst carrier for exhaust gas purification that can prevent the exhaust gas from becoming partially high.
（考案の構成）
本考案は、金属製波板と金属製平板とが交互に
積層され、その表面に触媒成分を含浸させるため
のアルミナコート層が形成されてなる排気ガス浄
化用触媒担体において、上記金属製平板に接合さ
れる金属製波板の頂辺部の一部に切欠部を形成し
て金属製波板と金属製平板との間に間〓を設けた
ものである。(Structure of the invention) The present invention provides a catalyst carrier for exhaust gas purification, in which corrugated metal plates and flat metal plates are alternately laminated, and an alumina coat layer for impregnating a catalyst component is formed on the surface of the catalyst carrier. A notch is formed in a part of the top side of the metal corrugated sheet to be joined to the metal flat plate to provide a gap between the metal corrugated sheet and the metal flat plate.
上記の構成によれば、金属製波板の頂辺部と金
属製平板との間にアルミナコート材が集積するこ
とが防止され、金属製担体の表面に形成されるア
ルミナコート層の厚みが均一化されて触媒成分の
密度の片寄りが防止されることとなる。 According to the above configuration, the alumina coating material is prevented from accumulating between the top side of the metal corrugated plate and the metal flat plate, and the thickness of the alumina coating layer formed on the surface of the metal carrier is uniform. This will prevent the density of the catalyst components from becoming uneven.
（実施例）
第１図および第２図は、本考案に係る排気ガス
浄化用触媒担体の実施例を示している。上記担体
は、ステンレス材等からなる金属製波板１と金属
製平板２とにより構成され、これらを一体に重ね
合わせた状態でロール状に巻いて金属製波板１と
金属製平板２とを交互に積層させることにより、
ハニカム状に形成されるようになつている。(Example) FIG. 1 and FIG. 2 show an example of the exhaust gas purifying catalyst carrier according to the present invention. The carrier is composed of a metal corrugated sheet 1 and a metal flat plate 2 made of stainless steel or the like, which are stacked together and rolled into a roll to form the metal corrugated sheet 1 and the metal flat plate 2. By laminating alternately,
It is formed into a honeycomb shape.
上記金属製波板１の山部と谷部に相当する頂辺
部には、両端部３を除いてスリツト状の切欠部４
が形成されている。そして上記金属製波板１は、
頂辺部の両端部３が金属製平板２にろう付け等の
手段で接合されるように構成されている。 A slit-shaped notch 4 is provided at the top portion of the metal corrugated sheet 1 corresponding to the peaks and valleys, except for both ends 3.
is formed. The metal corrugated plate 1 is
Both end portions 3 of the top side portion are configured to be joined to the metal flat plate 2 by means such as brazing.
上記のように構成された担体は、金属製波板１
の頂辺部に切欠部４が形成されているため、第３
図に示すように、金属製波板１の頂辺部と金属製
平板２との間に間〓が形成され、この部分にアル
ミナコート材の集積部となるコーナ部が形成され
ることが防止され、担体表面に適度な厚さのアル
ミナコート層５が均一に形成される。したがつ
て、上記アルミナコート層５に含浸される白金等
の触媒成分が均一に分散された状態で担持される
こととなる。 The carrier configured as described above is made of metal corrugated plate 1
Since the notch 4 is formed on the top side of the third
As shown in the figure, a gap is formed between the top side of the corrugated metal plate 1 and the flat metal plate 2, preventing the formation of a corner area where the alumina coating material accumulates. As a result, an alumina coating layer 5 of an appropriate thickness is uniformly formed on the surface of the carrier. Therefore, the catalyst components such as platinum impregnated into the alumina coat layer 5 are supported in a uniformly dispersed state.
上記構成の担体を使用した触媒と、従来の金属
製担体を使用した触媒との性能を比較するために
行なつた排気ガスの浄化ステトについて以下に説
明する。 An exhaust gas purification test conducted to compare the performance of a catalyst using a carrier with the above structure and a catalyst using a conventional metal carrier will be described below.
本考案に係る排気ガス浄化用触媒担体として、
板厚ｔが0.1mmで板幅50mmのステンレス材からな
る金属製波板１と金属製平板２とを使用し、この
金属製波板１は波幅Ｗが２mm、波高さＨが1.2mm、
波角度θが90°の波板状に形成され、かつ上記金
属製波板１の頂辺部には排気ガスの流れ方向に伸
びる幅Ａが0.6mm、長さＢが40mmの切欠部４が形
成されている。そして上記金属製波板１および金
属製平板２をロール状に巻いて容量24c.c.のハニカ
ム状筒体を形成し、これをアルミナ100g、ベー
マイト（水和アルミナ）100g、水250c.c.、硝酸1.2
c.c.の混合物からなるアルミナスラリーに浸漬して
担体表面にアルミナスラリーを付着させた後、余
分なアルミナスラリーを高圧エアーブロー等によ
つて除去し、その後150℃で約30分間乾燥すると
ともに55℃で約1.5時間焼成することにより、担
体上にアルミナコート層５を定着させる。次に所
定量の塩化白金、塩化ロジウムを溶解させてなる
水溶液中に上記担体を浸漬して取出した後、150
℃で約30分間乾燥させ、500℃で約２時間焼成す
ることにより、白金およびロジウムからなる触媒
成分を担持させる。上記アルミナコート層５は担
体に対して21wt％程度の割合で形成され、白金
およびロジウムはそれぞれ1.3g／ｌおよび
0.27g／ｌ程度の割合で担持される。 As a catalyst carrier for exhaust gas purification according to the present invention,
A metal corrugated plate 1 and a metal flat plate 2 made of stainless steel with a plate thickness t of 0.1 mm and a plate width of 50 mm are used, and the metal corrugated plate 1 has a wave width W of 2 mm, a wave height H of 1.2 mm,
The metal corrugated plate 1 is formed into a corrugated plate shape with a wave angle θ of 90°, and has a notch 4 extending in the flow direction of exhaust gas with a width A of 0.6 mm and a length B of 40 mm on the top side. It is formed. The corrugated metal plate 1 and the flat metal plate 2 are then rolled into a roll to form a honeycomb-shaped cylinder with a capacity of 24 c.c., which is then mixed with 100 g of alumina, 100 g of boehmite (hydrated alumina), and 250 c.c. of water. , nitric acid 1.2
After adhering the alumina slurry to the surface of the carrier by immersing it in an alumina slurry made of a mixture of cc, excess alumina slurry is removed by high-pressure air blowing, etc., and then dried at 150°C for about 30 minutes and heated at 55°C. The alumina coat layer 5 is fixed on the carrier by baking for about 1.5 hours. Next, the carrier was immersed in an aqueous solution containing a predetermined amount of platinum chloride and rhodium chloride and taken out.
By drying at ℃ for about 30 minutes and calcining at 500℃ for about 2 hours, the catalyst component consisting of platinum and rhodium is supported. The alumina coat layer 5 is formed at a ratio of about 21 wt% to the carrier, and platinum and rhodium are contained at 1.3 g/l and 1.3 g/l, respectively.
It is supported at a rate of about 0.27g/l.
これに対して従来の触媒としては金属製波板に
切欠部が形成されていない点を除いて上記実施例
に係る触媒と同様に形成されたものを使用した。 On the other hand, a conventional catalyst was used which was formed in the same manner as the catalyst according to the above embodiment except that the metal corrugated plate did not have a notch.
そして、上記両触媒に、空燃比14.7、ボリユー
ム24l／minのテストガスを導入してHCガスおよ
びCOガス、NOxガスの浄化テストを行なつた結
果、第４図〜第６図に示すようなデータが得られ
た。なお、上記触媒は、900℃の空気中で50時間
加熱することによりエージングしたものを用い
た。第７図は、触媒入口温度の変化状態を示して
いる。このテスト結果、本考案に係る担体を備え
た触媒は、従来のものに比べて排気ガスの浄化性
能が向上していることがわかる。 Then, a test gas with an air-fuel ratio of 14.7 and a volume of 24 l/min was introduced into both catalysts to perform a purification test of HC gas, CO gas, and NOx gas. As a result, the results shown in Figures 4 to 6 were obtained. The data was obtained. The catalyst used above was aged by heating in air at 900°C for 50 hours. FIG. 7 shows how the catalyst inlet temperature changes. The test results show that the catalyst equipped with the carrier according to the present invention has improved exhaust gas purification performance compared to the conventional catalyst.
上記のように、金属製平板２に接合される金属
製波板１の頂辺部の中央部に切欠部４を形成する
ことにより、この部分にアルミナコート材が集積
するのを防止することができるが、上記頂辺部の
両端部３には第８図に示すように、上記アルミナ
コート材が集積し易いコーナ部Ｃが形成され、こ
のコーナ部Ｃのアルミナコート層５ａが厚くな
り、これに応じて平面部Ｄ，Ｅのアルミナコート
層５ｂが薄くなる傾向がある。このアルミナコー
ト層５の厚みが不均一となるのを防止するため、
第９図に示すように、金属製波板１と金属製平板
２とを予め1000℃程度の空気中で約４時間熱処理
してその表面にアルミナ材のウイスカーを形成し
た後、それぞれ個別にアルミナコート層形成部６
に導入し、このアルミナコート層形成部６におい
てアルミナスラリータンク７内のアルミナスラリ
ーを供給ノズル８により上記金属製波板１と金属
製平板２に吹付けた後、エアーブローノズル９に
より加圧空気を吹付けて余分なアルミナスラリー
を除去する。次いで、乾燥部１０において約150
℃〜200℃のホツトエアを上記金属製波板１およ
び金属製平板２に吹付けて予備加熱した後、接合
部１１において金属製波板と金属製平板２とを一
体化させるとともに、巻付け部１２においてこれ
らをロール状に巻付けることによりハニカム状筒
体を形成する。 As mentioned above, by forming the notch 4 in the center of the top side of the metal corrugated plate 1 to be joined to the metal flat plate 2, it is possible to prevent the alumina coating material from accumulating in this part. However, as shown in FIG. 8, corner portions C are formed at both ends 3 of the top side portion, where the alumina coating material tends to accumulate, and the alumina coating layer 5a at this corner portion C becomes thicker. There is a tendency for the alumina coat layer 5b on the flat parts D and E to become thinner depending on the temperature. In order to prevent the thickness of this alumina coat layer 5 from becoming uneven,
As shown in Fig. 9, the metal corrugated plate 1 and the metal flat plate 2 are heat-treated in advance in air at about 1000°C for about 4 hours to form alumina whiskers on their surfaces, and then each is individually coated with alumina material. Coat layer forming section 6
In this alumina coat layer forming section 6, the alumina slurry in the alumina slurry tank 7 is sprayed onto the corrugated metal sheet 1 and the flat metal sheet 2 using the supply nozzle 8, and then pressurized air is Remove excess alumina slurry by spraying. Next, in the drying section 10, about 150
After preheating the metal corrugated sheet 1 and the metal flat plate 2 by blowing hot air at a temperature of ℃ to 200°C, the metal corrugated sheet and the metal flat plate 2 are integrated at the joint part 11, and the winding part At step 12, these are wound into a roll to form a honeycomb-shaped cylinder.
そして、上記ハニカム状筒体が所定の直径にな
つた時点で上記金属製波板１および金属製平板２
を切断し、これを500℃で約１時間焼成した後、
所定量の触媒成分をアルミナコート層に含浸させ
て担持させる。 When the honeycomb-shaped cylindrical body reaches a predetermined diameter, the metal corrugated plate 1 and the metal flat plate 2
After cutting it and firing it at 500℃ for about 1 hour,
A predetermined amount of the catalyst component is impregnated into the alumina coat layer and supported.
このように、上記金属製波板１と金属製平板２
とを交互に積層させて接合する前に、上記アルミ
ナコート層を形成するようにした場合には、上記
接合部にアルミナコート材が集積するのを確実に
防止できるという利点がある。 In this way, the metal corrugated plate 1 and the metal flat plate 2
If the alumina coat layer is formed before the layers are alternately laminated and bonded, there is an advantage that the alumina coat material can be reliably prevented from accumulating at the bonded portion.
なお、上記金属製波板１と金属製平板２とをロ
ール状に巻付ける際に、第１０図に示すように巻
付け始端部に上方に突出する巻芯部１３を設け、
この巻芯部１３を中心に金属製波板１および金属
製平板２を巻付けることにより担体１４を構成し
てもよい。この構成では、第１１図に示すように
上記巻芯部１３の先端部を触媒ケース１５の壁面
に固着した状態で触媒担体１４を設置することが
できるため、上記金属製波板１と金属製平板２と
の接合部が排気ガスの熱および振動等によつて剥
離した場合においても、上記金属製波板１および
金属製平板２が軸方向に移動することを防止で
き、安定した設置状態を得ることができる。 In addition, when winding the metal corrugated sheet 1 and the metal flat sheet 2 into a roll shape, a winding core portion 13 protruding upward is provided at the winding start end as shown in FIG.
The carrier 14 may be constructed by winding the metal corrugated plate 1 and the metal flat plate 2 around the winding core 13. In this configuration, as shown in FIG. 11, the catalyst carrier 14 can be installed with the tip of the winding core 13 fixed to the wall surface of the catalyst case 15, so that the metal corrugated plate 1 and the metal Even if the joint with the flat plate 2 peels off due to the heat of exhaust gas, vibration, etc., the metal corrugated plate 1 and the metal flat plate 2 can be prevented from moving in the axial direction, and a stable installation state can be maintained. Obtainable.
また、触媒担体の全体を金属材で形成した場合
には、担体の熱伝導度が良好であるために触媒全
体を早期に温度上昇させることができ、ウオーム
アツプ性能が優れている反面、蓄熱性が低いため
に排気ガスの温度が低下すると冷却し易く、触媒
性能が悪化する傾向がある。このため、第１２図
に示すように、外周部に金属性波板１と金属性平
板２とが交互に積層されてなる金属製担体１６を
設けるとともに、その内部にハニカム状のセラミ
ツク製担体１７を設けた構造とし、上記金属製担
体１６を設けることによつてウオームアツプ性能
を確保するとともに、セラミツク製担体１７を設
けることによつて蓄熱部を形成し、排気ガスの温
度が一時的に低下した場合でも触媒性能が悪化す
ることのないように構成することが望ましい。 In addition, when the entire catalyst carrier is made of a metal material, the carrier has good thermal conductivity, so the temperature of the entire catalyst can be raised quickly, and the warm-up performance is excellent. Since the exhaust gas temperature is low, it is easy to cool down when the exhaust gas temperature decreases, and the catalyst performance tends to deteriorate. For this purpose, as shown in FIG. 12, a metal carrier 16 in which corrugated metal plates 1 and flat metal plates 2 are alternately laminated is provided on the outer periphery, and a honeycomb-shaped ceramic carrier 17 is provided inside the carrier. By providing the metal carrier 16, warm-up performance is ensured, and by providing the ceramic carrier 17, a heat storage part is formed, and the temperature of the exhaust gas is temporarily lowered. It is desirable to configure the structure so that the catalyst performance does not deteriorate even in the case of the catalyst.
上記セラミツク製全体を１７からなる蓄熱部を
設けた触媒と、担体全体を金属材で形成した触媒
との性能を比較するために行なつた排気ガスの浄
化テストについて以下に説明する。なお、蓄熱部
を備えた本実施例に係る排気ガス浄化用触媒担体
として、金属製担体１６とセラミツク製担体１７
からなる担体の全断面積S1に対するセラミツク製
担体１７部の断面積S2の比率Ｒが16％のものを使
用した。また、担体に保持される触媒成分は、白
金とロジウムが５対１の比率で混合されたものを
使用し、これを担体に対して1.0g／ｌの割合で担
持させるようにした。 An exhaust gas purification test conducted to compare the performance of the above-mentioned catalyst having a heat storage section made entirely of ceramic and a catalyst having a support entirely made of a metal material will be described below. Note that as the exhaust gas purifying catalyst carrier according to the present embodiment equipped with a heat storage section, a metal carrier 16 and a ceramic carrier 17 are used.
The ratio R of the cross-sectional area S2 of 17 parts of the ceramic carrier to the total cross-sectional area S1 of the carrier made of ceramic was 16%. The catalyst component held on the carrier was a mixture of platinum and rhodium in a ratio of 5:1, and the catalyst component was supported on the carrier at a ratio of 1.0 g/l.
そして、上記蓄熱部を備えた担体を使用した触
媒と、蓄熱部のない担体を使用した触媒とに、空
燃比14.5、空間速度60000H-1のテストガスを導
入してHCガス、COガス、NOxガスの浄化テス
トを行なつた結果、第１３図〜第１５図に示すよ
うなデータが得られた。このテストの結果、上記
セラミツク製担体１７からなる蓄熱部を設けるこ
とにより、第１６図に示す触媒入口温度が比較的
低い領域において排気ガスの浄化性能が向上して
いることがわかる。なお、上記テストガスの空間
速度は、触媒の容量に対し何倍の容量のガスが触
媒を通過したかを表わすものである。 Then, a test gas with an air-fuel ratio of 14.5 and a space velocity of 60000 H -1 was introduced into the catalyst using the carrier equipped with the heat storage part and the catalyst using the carrier without the heat storage part, and HC gas, CO gas, NOx As a result of the gas purification test, data as shown in FIGS. 13 to 15 were obtained. The results of this test show that by providing the heat storage section made of the ceramic carrier 17, the exhaust gas purification performance is improved in the region where the catalyst inlet temperature is relatively low as shown in FIG. 16. Note that the above-mentioned space velocity of the test gas represents how many times the volume of gas has passed through the catalyst relative to the volume of the catalyst.
また、担体の全断面積S1に対するセラミツク製
担体１７部の断面積S2の比率Ｒの適正値を選択す
るために、上記比率Ｒを種々変化させて排気ガス
の浄化テストを行ない、テストを開始して５分後
のHCガスの浄化率を測定した結果、第１７図に
示すようなデータが得られた。このテストの結
果、上記比率Ｒが16〜35％程度の領域で排気ガス
の浄化性能が向上することが確認された。 In addition, in order to select an appropriate value for the ratio R of the cross-sectional area S2 of the 17 parts of the ceramic carrier to the total cross-sectional area S1 of the carrier, an exhaust gas purification test was conducted while varying the ratio R. As a result of measuring the purification rate of HC gas 5 minutes after the start, data as shown in FIG. 17 were obtained. As a result of this test, it was confirmed that the exhaust gas purification performance was improved in the range where the ratio R was approximately 16 to 35%.
（考案の効果）
以上説明したように本考案は、担体を構成する
金属製平板に接合される金属製波板の頂辺部の一
部に切欠部を形成し、上記金属製平板の頂辺部と
金属製波板との間に間〓を設けたため、この部分
にアルミナコート層を形成するコート材が集積す
るのを防止し、担体表面に適度な厚さのアルミナ
コート層を均一に形成することができる。したが
つて、上記アルミナコート層に含浸される触媒成
分が均一に分散され、シンタリング現象の発生が
防止されるために触媒性能を良好状態に維持する
ことができる。(Effects of the invention) As explained above, the present invention forms a notch in a part of the top of the metal corrugated plate to be joined to the metal flat plate constituting the carrier. Since there is a gap between the part and the metal corrugated plate, the coating material that forms the alumina coat layer is prevented from accumulating in this part, and an alumina coat layer of an appropriate thickness is uniformly formed on the carrier surface. can do. Therefore, the catalyst component impregnated into the alumina coat layer is uniformly dispersed, and the occurrence of sintering phenomenon is prevented, so that the catalyst performance can be maintained in a good state.
第１図は本考案に係る排気ガス浄化用触媒担体
の実施例を示す部分拡大斜視図、第２図は上記担
体の全体構成を示す斜視図、第３図は担体の軸方
向中央部の断面図、第４図〜第６図はそれぞれ上
記担体を備えた触媒の排気ガス浄化性能テストの
結果を示すグラフ、第７図は上記テスト時の触媒
入口温度を示すグラフ、第８図は担体の軸方向両
端部の断面図、第９図は上記担体の製造装置の実
施例を示す斜視図、第１０図は本考案の別の実施
例を示す斜視図、第１１図はその取付状態を示す
断面図、第１２図は本考案のさらに別の実施例を
示す斜視図、第１３図〜第１６図はその性能テス
トの結果を示すグラフ、第１７図は金属製担体と
セラミツク製担体の比率を変化させた場合のHC
ガス浄化率を示すグラフである。
１……金属製波板、２……金属製平板、４……
切欠部。
FIG. 1 is a partially enlarged perspective view showing an embodiment of the exhaust gas purifying catalyst carrier according to the present invention, FIG. 2 is a perspective view showing the overall structure of the carrier, and FIG. 3 is a cross-section of the axial center of the carrier. Figures 4 to 6 are graphs showing the results of the exhaust gas purification performance test of the catalyst equipped with the above carrier, Figure 7 is a graph showing the catalyst inlet temperature during the above test, and Figure 8 is the graph showing the catalyst inlet temperature during the above test. A sectional view of both ends in the axial direction, FIG. 9 is a perspective view showing an embodiment of the above-mentioned carrier manufacturing apparatus, FIG. 10 is a perspective view showing another embodiment of the present invention, and FIG. 11 shows its installed state. 12 is a perspective view showing yet another embodiment of the present invention, FIGS. 13 to 16 are graphs showing the results of performance tests, and FIG. 17 is the ratio of metal carrier to ceramic carrier. HC when changing
It is a graph showing a gas purification rate. 1... Metal corrugated plate, 2... Metal flat plate, 4...
Notch.
Claims (1)
その表面に触媒成分を含浸させるためのアルミナ
コート層が形成されてなる排気ガス浄化用触媒担
体において、上記金属製平板に接合される金属製
波板の頂辺部の一部に切欠部を形成して金属製波
板と金属製平板との間に間〓を設けたことを特徴
とする排気ガス浄化用触媒担体。 Corrugated metal plates and flat metal plates are laminated alternately,
In a catalyst carrier for exhaust gas purification, the surface of which is formed with an alumina coat layer for impregnating a catalyst component, a notch is formed in a part of the top of the corrugated metal plate to be joined to the flat metal plate. A catalyst carrier for exhaust gas purification, characterized in that a gap is provided between a corrugated metal plate and a flat metal plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14507887U JPH0451867Y2 (en) | 1987-09-22 | 1987-09-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14507887U JPH0451867Y2 (en) | 1987-09-22 | 1987-09-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6452543U JPS6452543U (en) | 1989-03-31 |
| JPH0451867Y2 true JPH0451867Y2 (en) | 1992-12-07 |
Family
ID=31413351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14507887U Expired JPH0451867Y2 (en) | 1987-09-22 | 1987-09-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0451867Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006032861A1 (en) * | 2006-07-14 | 2008-01-17 | Emitec Gesellschaft Für Emissionstechnologie Mbh | Production of openings in a metal foil and honeycomb body produced therewith for the treatment of exhaust gas |
-
1987
- 1987-09-22 JP JP14507887U patent/JPH0451867Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6452543U (en) | 1989-03-31 |
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