JP3287364B2 - Method for producing metal catalyst carrier - Google Patents
Method for producing metal catalyst carrierInfo
- Publication number
- JP3287364B2 JP3287364B2 JP32773091A JP32773091A JP3287364B2 JP 3287364 B2 JP3287364 B2 JP 3287364B2 JP 32773091 A JP32773091 A JP 32773091A JP 32773091 A JP32773091 A JP 32773091A JP 3287364 B2 JP3287364 B2 JP 3287364B2
- Authority
- JP
- Japan
- Prior art keywords
- plate
- flat plate
- corrugated
- metal catalyst
- catalyst carrier
- 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 - Fee Related
Links
- 229910052751 metal Inorganic materials 0.000 title claims description 26
- 239000002184 metal Substances 0.000 title claims description 26
- 239000003054 catalyst Substances 0.000 title claims description 24
- 238000004519 manufacturing process Methods 0.000 title claims description 14
- 239000010410 layer Substances 0.000 claims description 26
- 238000010438 heat treatment Methods 0.000 claims description 22
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 18
- 229910052782 aluminium Inorganic materials 0.000 claims description 16
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 15
- 239000011247 coating layer Substances 0.000 claims description 10
- 238000005219 brazing Methods 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 20
- 238000000034 method Methods 0.000 description 13
- 230000003647 oxidation Effects 0.000 description 13
- 238000007254 oxidation reaction Methods 0.000 description 13
- 239000000758 substrate Substances 0.000 description 5
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 229910001256 stainless steel alloy Inorganic materials 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Catalysts (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、排気ガスの浄化を行な
う触媒コンバータ等で用いられる金属製触媒担体の製造
方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a metal catalyst carrier used in a catalytic converter for purifying exhaust gas.
【０００２】[0002]
【従来の技術】一般に、排気ガスの浄化を行なうメタル
触媒コンバータ等では、金属製触媒担体が使用されてい
る。2. Description of the Related Art Generally, a metal catalyst carrier is used in a metal catalytic converter or the like for purifying exhaust gas.
【０００３】この種の金属製触媒担体は、図４に示す如
く、金属製の平板２１と波板２２とを重ね、これ等を巻
き回し、コア部２３を形成して構成されている。かかる
金属製触媒担体の製造方法を図５，図６により説明す
る。As shown in FIG. 4, this type of metal catalyst carrier is constituted by stacking a metal flat plate 21 and a corrugated plate 22 and winding them to form a core 23. A method for producing such a metal catalyst carrier will be described with reference to FIGS.
【０００４】アルミニウムを含有したフェライト系ステ
ンレス鋼合金からなる素材を材料として、平板２１と波
板２２に成形した後、これ等の平板２１と波板２２を多
重に巻いてコア部２３を成形し、この後、平板２１と波
板２２とをろう付け或いは溶接した後、基材２４（平板
２１及び波板２２）に熱処理して、基材２４の表面に、
特開昭６４−５８３５１号公報に示すようにアルミニウ
ムを媒体としてアルミナウィスカ層２５を生成し、さら
に、アルミナウィスカ層２５の表面に、白金等の金属触
媒２６Ａが含浸されたウォッシュコート層２６を形成す
る。After forming a flat plate 21 and a corrugated plate 22 from a material made of a ferritic stainless steel alloy containing aluminum, the flat plate 21 and the corrugated plate 22 are wound in multiple layers to form a core portion 23. After that, the flat plate 21 and the corrugated plate 22 are brazed or welded, and then heat-treated on the base material 24 (the flat plate 21 and the corrugated plate 22), so that the surface of the base material 24
As shown in JP-A-64-58351, an alumina whisker layer 25 is formed using aluminum as a medium, and a wash coat layer 26 impregnated with a metal catalyst 26A such as platinum is formed on the surface of the alumina whisker layer 25. I do.
【０００５】[0005]
【発明が解決しようとする課題】かかる金属製触媒担体
の製造方法にあっては、基材２４は、０℃から１０００
℃を超えた適切な温度までの温度域で熱処理される。こ
の熱処理の過程では、約８５０℃以下の温度域，約８５
０℃〜約１０００℃の温度域，約１０００℃以上の温度
域の３つの温度域で、それぞれ基材２４の表面の酸化過
程が異なる。即ち、 （１）約８５０℃以下の温度域では、基材２４の酸化速
度は遅く、基材２４の表面が酸化される。In such a method for producing a metal catalyst carrier, the substrate 24 is heated from 0 ° C. to 1000 ° C.
Heat treatment is performed in a temperature range up to an appropriate temperature exceeding ℃. In the process of this heat treatment, a temperature range of about 850 ° C. or less, about 85
The oxidation process of the surface of the base material 24 is different in three temperature ranges of 0 ° C. to about 1000 ° C. and about 1000 ° C. or more. That is, (1) in a temperature range of about 850 ° C. or lower, the oxidation rate of the base material 24 is low, and the surface of the base material 24 is oxidized.
【０００６】（２）基材２４は常法に従った加熱速度
（例えば５〜１０℃／分）で約８５０℃〜約１０００℃
の温度域を通過し、アルミナウィスカ層２５が生成され
るが、同時に粗雑な酸化アルミニウム層が一部生成され
る虞がある。(2) The substrate 24 is heated at a rate of about 850 ° C. to about 1000 ° C. at a heating rate (for example, 5 to 10 ° C./min) according to a conventional method.
, The alumina whisker layer 25 is generated, but a coarse aluminum oxide layer may be partially generated at the same time.
【０００７】そして、アルミニウムを媒体として生成さ
れたアルミナウィスカ層２５は、基材２４中のアルミニ
ウムが拡散により表面近傍に移動して、大気中の酸素と
反応して生成され、基材２４の表面上に多数のアルミナ
ウィスカが突き出た状態となっており、ミクロ的かつ平
面的にみると点在状の粗い状態で、表面を全面に亘って
被覆した状態にはなっていない。[0007] The alumina whisker layer 25 formed using aluminum as a medium is formed by the diffusion of aluminum in the base material 24 to the vicinity of the surface thereof and the reaction with oxygen in the atmosphere. A large number of alumina whiskers protrude from above, and when viewed microscopically and two-dimensionally, they are scattered in a coarse state and do not cover the entire surface.
【０００８】また、アルミナウィスカ層２５を生成する
ためには、所定の量の酸化増量を必要とし、それに応じ
て所定の量のアルミニウムも必要としており、素材２４
中のアルミニウムが基材２４の表面に拡散して供給され
る。その結果、基材２４のアルミニウムの成分が相対的
に少なくなり、基材２４を脆弱化することになる。In order to form the alumina whisker layer 25, a predetermined amount of oxidation is required, and accordingly, a predetermined amount of aluminum is also required.
The aluminum inside is diffused and supplied to the surface of the substrate 24. As a result, the aluminum component of the base material 24 is relatively reduced, and the base material 24 is weakened.
【０００９】（３）約１０００℃以上の温度域になる
と、約８５０℃〜約１０００℃の温度域で生成された粗
雑なアルミナウィスカ層２５をベースにして、さらにア
ルミナウィスカ層２５が生成されるが、そのアルミナウ
ィスカ層２５の表面が粗雑になり、緻密になり難いとい
う問題がある。かかる場合、基材２４の表面はアルミナ
ウィスカ層２５で全面に亘って覆われておらず、露出し
た部分があるため、耐酸化性が悪く、ひいては、耐熱性
が悪いという問題があった。加熱時間を長くすれば、基
材２４の表面は緻密にすることができるが、実用的では
ないとされている。(3) In the temperature range of about 1000 ° C. or more, the alumina whisker layer 25 is further formed on the basis of the coarse alumina whisker layer 25 formed in the temperature range of about 850 ° C. to about 1000 ° C. However, there is a problem that the surface of the alumina whisker layer 25 becomes coarse and difficult to become dense. In such a case, the surface of the base material 24 is not entirely covered with the alumina whisker layer 25, and there is an exposed portion. Therefore, there is a problem that the oxidation resistance is poor and the heat resistance is poor. If the heating time is lengthened, the surface of the base material 24 can be made dense, but it is not practical.
【００１０】本発明は、上述の問題点を解決するために
なされたもので、その目的は、基材（平板と波板）の耐
酸化性を向上させることができる金属製触媒担体の製造
方法を提供することである。The present invention has been made in order to solve the above-mentioned problems, and an object of the present invention is to provide a method for producing a metal catalyst carrier capable of improving the oxidation resistance of a substrate (a flat plate and a corrugated plate). It is to provide.
【００１１】[0011]
【課題を解決するための手段】本発明は、アルミニウム
を含有したフェライト系ステンレス鋼合金からなる素材
を成形した平板または小波板と波板とを重ね合わせ、こ
れらを多重に巻いた後、平板または小波板と波板とをろ
う付け或いは溶接等により接合し、次いで、前記平板ま
たは小波板と波板の表面に、ウォッシュコート層を付着
するための熱処理を施す金属製触媒担体の製造方法にお
いて、温度上昇過程で１分当たり５０℃以上の加熱速度
で８５０℃〜１０００℃の温度域を通過するように平板
または小波板と波板に熱処理を施して、平板または小波
板と波板の表面に非アルミナウィスカ形態の酸化アルミ
ニウムの皮膜層を生成することを特徴とする。According to the present invention, a flat plate or a small corrugated plate formed of a material made of a ferritic stainless steel alloy containing aluminum and a corrugated plate are overlapped, and after these are wrapped in multiple layers, the flat plate or the corrugated plate is wound. In the method for manufacturing a metal catalyst carrier, a small corrugated sheet and a corrugated sheet are joined by brazing or welding or the like, and then the flat plate or the small corrugated sheet and the surface of the corrugated sheet are subjected to a heat treatment for attaching a washcoat layer. subjected to heat treatment in a flat plate or wavelet plate and the corrugated plate so as to pass through the temperature range of 850 ° C. to 1000 ° C. at 50 ° C. over a heating rate per minute temperature rise process, the surface of the plate or wavelet plate and the corrugated plate It is characterized by forming a coating layer of aluminum oxide in the form of non-alumina whiskers .
【００１２】[0012]
【作用】本発明においては、温度上昇過程で１分当たり
５０℃以上の加熱速度で８５０℃〜１０００℃の温度域
を通過するように平板または小波板と波板に熱処理を施
して、平板または小波板と波板の表面に非アルミナウィ
スカ形態の酸化アルミニウムの皮膜層を生成する。According to the present invention, heat-treated in a flat plate or wavelet plate and the corrugated plate so as to pass through the temperature range of 850 ° C. to 1000 ° C. at 50 ° C. over a heating rate per minute temperature rise process, flat or Non-alumina foil on the surface of the corrugated sheet and corrugated sheet
Produces a coating layer of aluminum oxide in the form of a ska .
【００１３】[0013]
【実施例】以下、図面により本発明の実施例について説
明する。図１は本発明の実施例に係わる金属製触媒担体
の製造方法を工程を追って示す説明図である。なお、本
実施例においては、金属製触媒担体の構成部品は従来例
と同様であり、金属製触媒担体は、図４に示す如く、後
述の金属材料の平板２１と波板２２とを重ね、これ等を
巻き回し、コア部２３を形成して構成されている。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory diagram illustrating a method of manufacturing a metal catalyst carrier according to an embodiment of the present invention step by step. In the present embodiment, the components of the metal catalyst carrier are the same as those of the conventional example. As shown in FIG. 4, the metal catalyst carrier is formed by stacking a flat plate 21 and a corrugated plate 22 of a metal material to be described later. These are wound to form a core portion 23.
【００１４】第１工程Ｓ１では、平板２１と波板２２
は、アルミニウム５％を含有した鉄７５％、クロム２０
％のステンレス鋼合金を材料としており、その素材を準
備する。 第２工程Ｓ２では、常法に従って、素材を平
板２１と波板２２に成形した後、平板２１と波板２２を
多重に巻いてコア部２３を成形し、この後、平板２１と
波板２２とをろう付け或いは溶接する。In the first step S1, a flat plate 21 and a corrugated plate 22
Is 75% iron containing 5% aluminum and 20% chromium
% Stainless steel alloy, and prepare the material. In the second step S2, the material is formed into a flat plate 21 and a corrugated plate 22 according to a conventional method, and then the flat plate 21 and the corrugated plate 22 are wound in multiple layers to form a core portion 23. And brazing or welding.
【００１５】第３工程Ｓ３では、前記平板２１と波板２
２とに熱処理が施される。即ち、（１）８５０℃以下の
温度域では、平板２１と波板２２の酸化速度は小さく、
それらの表面が酸化される。（２）温度上昇過程で１分
当たり７０℃以上の加熱速度で８５０℃〜１０００℃の
温度域を通過するように平板２１と波板２２の表面に熱
処理を施して図２に示す酸化アルミニウムの皮膜層（非
アルミナウィスカ形態）１が生成される。この加熱速度
は、図３の点線で示すような従来のアルミナウィスカ層
を生成する場合の加熱速度に比して、速くなっており、
実験によれば、図３の実線で示すような酸化増量が得ら
れる。（３）温度域が１０００℃以上になると、８５０
℃〜１０００℃の温度域で生成された緻密な酸化アルミ
ニウムの皮膜層１をベースにして、さらに酸化アルミニ
ウムの皮膜層１が生成されるが、その酸化アルミニウム
の皮膜層１の表面が緻密になる。ミクロ的かつ平面的に
みると、酸化アルミニウムの皮膜層１は、平板２１（波
板２２）の表面の全体を覆うように緻密な組織となって
いる。なお、図には平板２１の場合のみを図示してい
る。In the third step S3, the flat plate 21 and the corrugated plate 2
2 is subjected to a heat treatment. That is, (1) in a temperature range of 850 ° C. or less, the oxidation rate of the flat plate 21 and the corrugated plate 22 is small,
Their surface is oxidized. (2) The surfaces of the flat plate 21 and the corrugated plate 22 are subjected to heat treatment so as to pass through a temperature range of 850 ° C. to 1000 ° C. at a heating rate of 70 ° C. or more per minute during the temperature rising process, and the aluminum oxide shown in FIG. A coating layer (non-alumina whisker form) 1 is generated. This heating rate is higher than the heating rate when a conventional alumina whisker layer is formed as shown by a dotted line in FIG.
According to the experiment, the oxidation increase as shown by the solid line in FIG. 3 is obtained. (3) When the temperature range exceeds 1000 ° C. , 850
On the basis of the dense aluminum oxide coating layer 1 generated in the temperature range of from 1 to 1000 ° C., an aluminum oxide coating layer 1 is further generated, and the surface of the aluminum oxide coating layer 1 becomes dense. . From a microscopic and planar perspective, the aluminum oxide coating layer 1 has a dense structure so as to cover the entire surface of the flat plate 21 (corrugated plate 22). It should be noted that only the case of the flat plate 21 is shown in the figure.
【００１６】第４工程Ｓ４では、酸化アルミニウムの皮
膜層１の表面に、白金等の金属触媒２Ａが含浸されたウ
ォッシュコート層２を形成する。以上の如き構成によれ
ば、温度上昇過程で１分当たり７０℃以上の加熱速度で
８５０℃〜１０００℃の温度域を通過するように平板２
１と波板２２の表面に熱処理を施して酸化アルミニウム
の皮膜層１が生成されるので、従来例の如きミクロ的か
つ平面的にみるとアルミナウィスカ層が点在状の粗い状
態で、表面を全面に亘って被覆した状態ではないのに比
して、平板２１，波板２２の表面の全体を覆うように酸
化アルミニウムの皮膜層が生成される。平板２１，波板
２２の表面はミクロ的かつ平面的にみると緻密な状態と
なっている。従って、平板２１，波板２２の表面の耐酸
化性を向上させ、ひいては、耐熱性も向上させることが
できる。In a fourth step S4, a wash coat layer 2 impregnated with a metal catalyst 2A such as platinum is formed on the surface of the aluminum oxide film layer 1. According to the above-described configuration, at a heating rate of 70 ° C. or more per minute during the temperature rising process.
The flat plate 2 passes through a temperature range of 850 ° C. to 1000 ° C.
1 and the surface of the corrugated plate 22 are subjected to a heat treatment to form the aluminum oxide film layer 1. Therefore, when viewed microscopically and planarly as in the conventional example, the alumina whisker layer is dotted and rough. An aluminum oxide film layer is formed so as to cover the entire surface of the flat plate 21 and the corrugated plate 22 as compared with a state where the aluminum plate is not covered over the entire surface. The surfaces of the flat plate 21 and the corrugated plate 22 are dense when viewed microscopically and planarly. Therefore, the oxidation resistance of the surfaces of the flat plate 21 and the corrugated plate 22 can be improved, and the heat resistance can be improved.
【００１７】また、酸化アルミニウムの皮膜層１を生成
するためには、所定の量の酸化増量を必要とし、それに
応じて所定の量のアルミニウムも必要としているが、図
３に点線で示す従来のアルミナウィスカ層を生成する場
合に比して、酸化増量が少なく、それに対応してアルミ
ニウムの量も少ないので、平板２１，波板２２中のアル
ミニウムが表面上に拡散する量が少なく、基材２４中に
残存し、平板２１，波板２２の脆弱化を防止することが
できる。Further, in order to form the aluminum oxide film layer 1, a predetermined amount of oxidation is required, and accordingly, a predetermined amount of aluminum is also required. Compared with the case of forming the alumina whisker layer, the amount of oxidation increase is small and the amount of aluminum is correspondingly small, so that the amount of aluminum in the flat plate 21 and the corrugated plate 22 diffused on the surface is small, and the substrate 24 It remains inside and can prevent the flat plate 21 and the corrugated plate 22 from being weakened.
【００１８】なお、本実施例においては、温度上昇過程
で１分当たり７０℃以上の加熱速度で８５０℃〜１００
０℃の温度域を通過するように平板２１，波板２２の表
面に熱処理を施して酸化アルミニウムの皮膜層１が生成
されるようになっているが、少なくとも１分当たり５０
℃以上の加熱速度で行なっても同様の効果が得られる。In this embodiment, the temperature is increased from 850.degree. C. to 100.degree.
Heat treatment is performed on the surfaces of the flat plate 21 and the corrugated plate 22 so as to pass through the temperature range of 0 ° C. , so that the aluminum oxide film layer 1 is generated.
The same effect can be obtained even when the heating is performed at a heating rate of not less than ° C.
【００１９】また、本実施例においては、平板２１と波
板２２を積層して該金属触媒担体を構成したが、平板２
１に代えて、低い山の波を形成してなる小波板と波板と
で金属触媒担体を構成することもできる。In this embodiment, the flat plate 21 and the corrugated plate 22 are laminated to constitute the metal catalyst carrier.
Instead of 1, the metal catalyst carrier may be composed of a small corrugated sheet formed with a low peak wave and a corrugated sheet.
【００２０】さらに、本実施例の金属触媒担体において
は、平板２１と波板２２との接合はろう付けまたは溶接
によって行なわれているが、これに限定されず、平板２
１と波板２２との積層体が保持される接合方法でも良
い。Further, in the metal catalyst carrier of this embodiment, the flat plate 21 and the corrugated plate 22 are joined by brazing or welding, but the present invention is not limited to this.
A joining method in which a laminate of the corrugated sheet 1 and the corrugated sheet 22 is held may be used.
【００２１】[0021]
【発明の効果】以上説明したよう本発明によれば、温度
上昇過程で１分当たり５０℃以上の加熱速度で８５０℃
〜１０００℃の温度域を通過するように平板または小波
板と波板に熱処理を施して、平板または小波板と波板の
表面に非アルミナウィスカ形態の酸化アルミニウムの皮
膜層を生成するので、ミクロ的かつ平面的にみると従来
のアルミナウィスカ層が点在状の粗い状態で、平板また
は小波板，波板の表面を全面に亘って被覆した状態では
ないのに比して、平板または小波板，波板の表面の全体
を覆うように非アルミナウィスカ形態の酸化アルミニウ
ムの皮膜層が生成される。平板または小波板，波板の表
面はミクロ的かつ平面的にみると緻密な状態となってい
る。従って、平板または小波板，波板の表面の耐酸化性
を向上させ、ひいては、耐熱性も向上させることができ
る。As described above, according to the present invention, at a heating rate of 50.degree.
A flat plate or a small corrugated sheet and a corrugated sheet are subjected to a heat treatment so as to pass through a temperature range of ~ 1000 ° C to form a non-alumina whisker-type aluminum oxide film layer on the surface of the flat plate or a small corrugated sheet and a corrugated sheet. When viewed from the top and in a plane, the conventional alumina whisker layer is in a dotted and rough state, and is not a flat plate or a small corrugated plate or a state in which the surface of the corrugated plate is entirely covered. Then, a coating layer of aluminum oxide in the form of non-alumina whiskers is formed so as to cover the entire surface of the corrugated sheet. The surface of a flat plate, a small corrugated plate, or a corrugated plate is in a dense state when viewed microscopically and planarly. Therefore, it is possible to improve the oxidation resistance of the surface of the flat plate, the small corrugated sheet, and the corrugated sheet, and also to improve the heat resistance.
【００２２】また、非アルミナウィスカ形態の酸化アル
ミニウムの皮膜層を生成するために必要な酸化増量が、
従来のアルミナウィスカ層を生成する場合に比して少な
く、それに対応してアルミニウムの量も少ないので、平
板または小波板と波板中のアルミニウムが表面上に拡散
する量が少なく、基材中に充分に残存し、平板または小
波板，波板の脆弱化を防止することができる効果を奏す
る。Further, the amount of oxidation increase required to form a coating layer of aluminum oxide in the form of non-alumina whiskers is as follows:
The amount of aluminum in the flat plate or small corrugated plate and the corrugated plate is small, and the amount of aluminum in the corrugated plate is small. This is effective in that it remains sufficiently and can prevent the flat plate, the small corrugated plate, and the corrugated plate from becoming weak.
【図１】本発明の実施例に係る金属製触媒担体の製造方
法の工程図である。FIG. 1 is a process chart of a method for producing a metal catalyst carrier according to an embodiment of the present invention.
【図２】同金属製触媒担体の製造方法によって製造され
た波板，平板のミクロ構造断面図である。FIG. 2 is a microstructure cross-sectional view of a corrugated plate and a flat plate manufactured by the method for manufacturing a metal catalyst carrier.
【図３】同金属製触媒担体の製造方法の温度上昇過程と
酸化増量との関係を示す説明図である。FIG. 3 is an explanatory diagram showing a relationship between a temperature increasing process and an increase in oxidation in the method for producing the metal catalyst carrier.
【図４】従来における金属製触媒担体の斜視図である。FIG. 4 is a perspective view of a conventional metal catalyst carrier.
【図５】同金属製触媒担体の製造方法の工程図である。FIG. 5 is a process chart of the method for producing the metal catalyst carrier.
【図６】同金属製触媒担体の製造方法によって製造され
た平板，波板のミクロ構造断面図である。FIG. 6 is a microstructure sectional view of a flat plate and a corrugated plate manufactured by the method for manufacturing a metal catalyst carrier.
１ 酸化アルミニウムの皮膜層 ２ ウォッシュコート層 ２１ 平板 ２２ 波板 DESCRIPTION OF SYMBOLS 1 Aluminum oxide film layer 2 Wash coat layer 21 Flat plate 22 Corrugated plate
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) B01J 21/00 - 38/74 B01D 53/94 ────────────────────────────────────────────────── ─── Continued on the front page (58) Field surveyed (Int. Cl. 7 , DB name) B01J 21/00-38/74 B01D 53/94
Claims (1)
テンレス鋼合金からなる素材を成形した平板（２１）ま
たは小波板と波板（２２）とを重ね合わせ、これらを多
重に巻いた後、平板（２１）または小波板と波板（２
２）とをろう付け或いは溶接等により接合し、次いで、
前記平板（２１）または小波板と波板（２２）の表面
に、ウォッシュコート層（２）を付着するための熱処理
を施す金属製触媒担体の製造方法において、 温度上昇過程で１分当たり５０℃以上の加熱速度で８５
０℃〜１０００℃の温度域を通過するように平板（２
１）または小波板と波板（２２）に熱処理を施して、平
板（２１）または小波板と波板（２２）の表面に非アル
ミナウィスカ形態の酸化アルミニウムの皮膜層（１）を
生成することを特徴とする金属製触媒担体の製造方法。1. A flat plate (21) formed from a material made of a ferritic stainless steel alloy containing aluminum or a small corrugated plate and a corrugated plate (22) are superimposed on each other, and after being wrapped in multiple layers, the flat plate (21) is formed. Or a small corrugated sheet and corrugated sheet (2
2) is joined by brazing or welding, and then
In the method for producing a metal catalyst carrier in which a heat treatment for attaching a washcoat layer (2) to the surface of the flat plate (21) or the small corrugated plate and the corrugated plate (22) is performed, 85 at the above heating rate
A flat plate (2) passes through a temperature range of 0 ° C to 1000 ° C.
1) or heat-treating the small corrugated sheet and the corrugated sheet (22) so that the surface of the flat plate (21) or the small corrugated sheet and the corrugated sheet (22) is non-alert
A method for producing a metal catalyst carrier, comprising forming an aluminum oxide coating layer (1) in the form of a minawhisker .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32773091A JP3287364B2 (en) | 1991-12-11 | 1991-12-11 | Method for producing metal catalyst carrier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32773091A JP3287364B2 (en) | 1991-12-11 | 1991-12-11 | Method for producing metal catalyst carrier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05154390A JPH05154390A (en) | 1993-06-22 |
| JP3287364B2 true JP3287364B2 (en) | 2002-06-04 |
Family
ID=18202350
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32773091A Expired - Fee Related JP3287364B2 (en) | 1991-12-11 | 1991-12-11 | Method for producing metal catalyst carrier |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3287364B2 (en) |
-
1991
- 1991-12-11 JP JP32773091A patent/JP3287364B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05154390A (en) | 1993-06-22 |
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