JP6783292B2 - 複合ワイヤー型触媒部材とこれを用いた水素製造用の触媒反応器 - Google Patents
複合ワイヤー型触媒部材とこれを用いた水素製造用の触媒反応器 Download PDFInfo
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- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/52—Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
- Hydrogen, Water And Hydrids (AREA)
- Catalysts (AREA)
Description
a)通電によって所定温度に加熱発熱する金属製の発熱線と、
b)該発熱線を被包し、かつ該発熱線とは異種の第二金属材料でなる被覆金属層と、
c)その被覆金属層の外周面に、所定の触媒物質を担持する触媒担持層を備えるとともに、
d)該触媒担持層に担持された前記触媒物質を含み、
e)前記発熱線及び被覆金属層の界面は、使用に伴い形成される前記発熱線と被覆金属層同士の余剰拡散を抑える拡散抑止層を、その周方向に沿って非平滑な凹凸状態に備えることを特徴とする複合ワイヤー型触媒部材である。
本発明に係る複合ワイヤー型の触媒部材(以下、単に触媒部材という)は、前記するように通電によって所定温度に加熱発熱する線状の金属製発熱線1A(以下、単に発熱線とも言う)と、これを被包し、該発熱線とは異なる第二金属材料でなる被覆金属層1Bと、更に、その表面側に積層形成される触媒担持層1Cを備える複合型線材で構成され、該触媒担持層1Cにはその表面上に予め設定される所定の触媒物質Xが担持されてなる。
以下、更に次の実施例により本発明を説明する。
通電加熱機能を有するニッケル線(純度99%)をアルミニウム(純度99.9%)の帯材で被包し、線径12mmのアルミクラッド線材(複合線)の母線材を出発材料として用いた。そして、この母線材に対して、温度620℃×5minの条件での中間熱処理後、最終加工率88%の冷間伸線加工によって細径化し、最終的に線径0.7mmφの複合細線を得た。
次に、コイル線に対して、温度35℃の4wt%しゅう酸水溶液、電流密度60A/m 2 の条件で陽極酸化処理が行なわれた。その後、同種のしゅう酸処理液に6時間浸漬したままで酸処理をし、ポアサイズの拡幅処理をして大気中で乾燥させた。次に、400℃で約1時間の焼成処理をした後、80℃以上で約2時間水和処理を行なって乾燥させた。その後、さらに500℃で3時間焼成し、表面に細孔を持つ多孔質構造のアルマイト層の具えるアルマイトクラッド金属細線とし、更にこれを次の触媒処理によって、表面に白金の触媒物質を担持させた。
次に、このコイル線体の8本を直列につないで単位ブロックとして、その三組を各々別製の支持ホルダーに順次組み込みすることで、合計24本のコイル線体を備える触媒ユニットとしている。
2 コイル部
1A 発熱線
1B 被覆金属層
1C 触媒担持層
X 触媒物質
Y 拡散抑止層
Claims (7)
- 通電によって所定温度に加熱発熱する金属製の発熱線と、
該発熱線を被包し、かつ該発熱線とは異種の第二金属材料でなる被覆金属層と、
その被覆金属層の外周面に、所定の触媒物質を担持する触媒担持層と、
該触媒担持層に担持された前記触媒物質とを含み、
前記被覆金属層は、前記発熱線を前記被覆金属層で被覆形成した複合線を、両者の密着性を高めるよう目標線径に細径化されたクラッド構造を備え、
前記発熱線及び前記被覆金属層の界面は、使用に伴い形成される前記発熱線と前記被覆金属層同士の余剰拡散を抑える拡散抑止層を、その周方向に沿って非平滑な凹凸状に備え、
前記拡散抑止層は、前記発熱線及び前記被覆金属層の相互拡散で予め形成した前駆拡散層であり、かつ、前記発熱線と前記被覆金属層の境界面に沿って環状に連続して形成されており、
前記前駆拡散層は、前記発熱線と前記被覆金属層との前記クラッド構造の前記被覆複合線の製造段階での熱処理に伴い層状に形成した金属間化合物によるものである、
複合ワイヤー型触媒部材。 - 前記発熱線は、ニッケル金属、前記被覆金属層はアルミニウム金属で構成され、
前記前駆拡散層は、前記ニッケル金属と前記アルミニウム金属との熱反応により生成されるNi−Al系金属間化合物で構成され、
前記Ni−Al系金属間化合物が、NiAl、Ni 3 Al、Ni 5 Al 3 及びNi 2 Al 3 のいずれかである請求項1に記載の複合ワイヤー型触媒部材。 - 前記拡散抑止層は、その構成厚さが60μm以下のものである請求項1又は2に記載の複合ワイヤー型触媒部材。
- 前記拡散抑止層は、その構成厚さの中央位置が描く横断面面積から算出される見掛け周長に対して、1.02〜1.4倍の実周長を備える前記凹凸状をなすものである請求項1〜3のいずれかに記載の複合ワイヤー型触媒部材。
- 前記触媒部材は、更にコイル掛けによって密着状に巻回されたコイル部を備えるものである請求項1〜4のいずれかに記載の複合ワイヤー型触媒部材。
- 前記コイル部は、その平面視で70°以下の傾斜角(α)で一定方向に斜め巻きされたものである請求項5に記載の複合ワイヤー型触媒部材。
- 請求項1〜6のいずれかに記載の触媒部材の複数を、所定の触媒反応室内に供給される被処理流体の流通方向に沿って複数段に積層配置するとともに、該触媒部材の前記発熱線に各々通電加熱する電気回路を備えることを特徴とする水素製造用の触媒反応器。
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