JPS6316131Y2 - - Google Patents
Info
- Publication number
- JPS6316131Y2 JPS6316131Y2 JP1982196744U JP19674482U JPS6316131Y2 JP S6316131 Y2 JPS6316131 Y2 JP S6316131Y2 JP 1982196744 U JP1982196744 U JP 1982196744U JP 19674482 U JP19674482 U JP 19674482U JP S6316131 Y2 JPS6316131 Y2 JP S6316131Y2
- Authority
- JP
- Japan
- Prior art keywords
- electrode plate
- fuel electrode
- inert gas
- container
- cleaning
- 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
Classifications
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Landscapes
- Inert Electrodes (AREA)
Description
【考案の詳細な説明】
この考案は酸性燃料電池用燃料極板の触媒コー
テイング後処理装置に関する。[Detailed Description of the Invention] This invention relates to a catalyst coating post-treatment device for a fuel electrode plate for an acid fuel cell.
酸性電解液を使用し、液体燃料で作動するいわ
ゆる酸性燃料電池は、燃料極と空気極とを有して
おり、該燃料極は例えばカーボン繊維または200
〜330メツシユ程度のカーボンもしくはチタン粉
末を真空下で燃結して形成された多孔質電導性担
体（以下、燃料極板または基体という）に白金と
スズとを被覆したもの（触媒コーテイングしたも
の）である。 So-called acid fuel cells, which use an acid electrolyte and operate on liquid fuel, have a fuel electrode and an air electrode, the fuel electrode being made of, for example, carbon fiber or 200
A porous conductive carrier (hereinafter referred to as a fuel electrode plate or substrate) formed by sintering ~330 mesh of carbon or titanium powder under vacuum and coated with platinum and tin (catalyst coated) It is.
この燃料極板の触媒コーテイング方法として
は、従来、特開昭56−59466号公報に開示された
ものが知られている。すなわち、カーボンまたは
タンタル製の多孔質基体を触媒成分を含む金属塩
水溶液（例えば塩化白金酸水溶液（H2 Ptcl- 4・
6H2 Ｏ））中に浸漬して該水溶液を基体に含浸さ
せ、この後これを乾燥させ、さらに還元性水溶液
中に該基体を浸漬して還元反応を起こさせること
により（この操作は繰り返される）、触媒成分
（例えば白金）を基体に付着担持させているので
ある。ここで、還元剤としては自ら分解して水素
ガスを供給するホルマリン、ヒドラジン等が使用
されている。次いで、該基体は空気中に取り出さ
れるのである。 As a method for catalytic coating of fuel electrode plates, the method disclosed in Japanese Patent Application Laid-Open No. 56-59466 is known. That is, a porous substrate made of carbon or tantalum is injected into a metal salt aqueous solution containing a catalyst component (for example, a chloroplatinic acid aqueous solution (H 2 Ptcl - 4 .
6H 2 O)) to impregnate the substrate with the aqueous solution, then drying it, and then immersing the substrate in a reducing aqueous solution to cause a reduction reaction (this operation is repeated). ), a catalyst component (for example, platinum) is attached and supported on the substrate. Here, formalin, hydrazine, etc., which decompose themselves and supply hydrogen gas, are used as the reducing agent. The substrate is then removed into the air.
しかしながら、このような従来の触媒コーテイ
ング方法にあつては、白金等の触媒を基体に還元
付着した段階で、還元剤の分解によつて発生した
多量の水素ガスが基体細孔内に吸収・蓄積されて
いる。従つて、コーテイング完了後、この基体を
そのままコーテイング槽から取り出すと、該水素
ガスと大気中の酸素とが触媒（白金）上で触媒燃
焼を起こし、その結果、触媒が基体上から剥離し
てしまい触媒のコーテイングにおいてバラツキが
発生するという問題点が生じていた。 However, in such conventional catalyst coating methods, when a catalyst such as platinum is reduced and adhered to a substrate, a large amount of hydrogen gas generated by decomposition of the reducing agent is absorbed and accumulated in the pores of the substrate. has been done. Therefore, if the substrate is taken out of the coating tank after coating is completed, the hydrogen gas and atmospheric oxygen will cause catalytic combustion on the catalyst (platinum), and as a result, the catalyst will peel off from the substrate. A problem has arisen in that variations occur in the coating of the catalyst.
この考案はこのような従来の問題点に着目して
なされたもので、不活性ガス雰囲気中で還元反応
を生じさせるとともに、還元後の基体を脱空気し
た洗浄水で洗浄することにより、触媒燃焼を防止
して触媒コーテイングのバラツキを除去すること
を目的としている。 This idea was devised by focusing on these conventional problems.The reduction reaction occurs in an inert gas atmosphere, and the substrate after reduction is washed with deaerated washing water, thereby achieving catalytic combustion. The purpose is to prevent this and eliminate variations in the catalyst coating.
この考案の構成について説明する。 The configuration of this idea will be explained.
燃料電池用燃料極板の触媒コーテイング後処理
装置は、触媒の金属塩水溶液中に浸漬して乾燥さ
せた燃料極板が内部に保持される密閉容器と、該
容器中に還元性溶液を供給し、燃料極板に還元反
応を生じさせることにより触媒コーテイングを施
す還元手段と、容器中に洗浄水を供給してコーテ
イング後の燃料極板を洗浄する洗浄水供給手段
と、前記還元性溶液および洗浄水に不活性ガスを
供給して還元反応から洗浄までの間前記密閉容器
中を不活性ガスにより充填する不活性ガス供給手
段と、を備えているものである。 A catalyst coating post-treatment device for a fuel electrode plate for a fuel cell includes a closed container in which a fuel electrode plate that has been immersed in an aqueous metal salt solution of a catalyst and dried is held therein, and a reducing solution is supplied into the container. , a reducing means for applying a catalytic coating to the fuel electrode plate by causing a reduction reaction, a washing water supply means for supplying washing water into a container to wash the coated fuel electrode plate, and the reducing solution and washing. The apparatus includes an inert gas supply means for supplying an inert gas to the water and filling the airtight container with the inert gas from the reduction reaction to the cleaning.
以下、この考案の実施例を図面に従つて説明す
る。 Embodiments of this invention will be described below with reference to the drawings.
図面はこの考案の一実施例を示すものである。
図面において、１はアクリル樹脂製の容器であ
り、この容器１の上端開口部はアクリル樹脂製の
カバー２により密閉されている。これらの容器１
およびカバー２は密閉容器１０を構成している。
３はカバー１と容器２との間に挾圧されて気密性
を確保するためのバイトンパツキンであり、４は
該パツキン３を挾圧する挾圧固定部材（ハサミ）
である。密閉容器１０内には多孔質の触媒担持基
体（燃料極板）５がガイド６によつて吊り下げ、
支持されており、このガイド６は密閉容器１０内
で上下動自在に設けられている。ここで、この燃
料極板５は触媒（例えば白金）の金属塩水溶液
（塩化白金酸水溶液）中に浸漬された（含浸）後
に乾燥されたものである。密閉容器１０内には還
元手段によつてホルマリンまたはヒドラジン100
％の還元性溶液Ｌが供給されており、前記燃料極
板５はこの還元性溶液中に浸漬されることにな
る。ここで、還元手段は還元性溶液Ｌ中に上記燃
料極板５を浸漬して該燃料極板５に還元反応（水
素ガス発生）を生じさせることにより、燃料極板
５を触媒コーテイングするものである。また、７
は密閉容器１０の底部に設けられた溶液撹拌用の
マグネテイツク撹拌子である。なお、１１は溶液
の排出路を開閉する排液バルブを示し、１２は密
閉容器１０からの排ガス路に介装された排ガスバ
ルブである。また、８は洗浄用純水（洗浄水Ｑ）
を室温状態で貯留するタンクであり、このタンク
８からの洗浄水はパイプより前記密閉容器１０中
に供給される。なお、１３は該パイプに介装され
たバルブであり、１４はタンク８からの気体抜き
用のバルブを示している。このタンク８は洗浄水
供給手段２０を構成することになり、該手段２０
によつて燃料極板５を洗浄する洗浄水が密閉容器
１０中に供給される。不活性ガス（N2ガス等）
を供給する不活性ガス供給手段３０は供給源（図
外）から分岐したパイプによつて密閉容器１０の
下部およびタンク８にそれぞれ連通してこれらの
密閉容器１０およびタンク８に不活性ガスを供給
するもので、各パイプにはそれぞれ開閉バルブ１
５，１６が介装されている。また、この手段３０
から前記還元性溶液Ｌ中に不活性ガスが供給され
る結果、密閉容器１０内に不活性ガスが充填され
る。タンク８内の洗浄水Ｑ中にも不活性ガスが供
給され該洗浄水Ｑは該タンク８内で脱空気され
る。 The drawings show one embodiment of this invention.
In the drawing, 1 is a container made of acrylic resin, and the upper end opening of this container 1 is sealed with a cover 2 made of acrylic resin. These containers 1
The cover 2 constitutes a closed container 10.
Reference numeral 3 denotes a Viton gasket that is clamped between the cover 1 and the container 2 to ensure airtightness, and 4 is a clamping fixing member (scissors) that clamps the gasket 3.
It is. Inside the closed container 10, a porous catalyst supporting substrate (fuel electrode plate) 5 is suspended by a guide 6.
The guide 6 is vertically movable within the closed container 10. Here, the fuel electrode plate 5 is immersed (impregnated) in a metal salt aqueous solution (chloroplatinic acid aqueous solution) of a catalyst (for example, platinum) and then dried. In the airtight container 10, formalin or hydrazine 100% is added by reducing means.
% reducing solution L is supplied, and the fuel electrode plate 5 is immersed in this reducing solution. Here, the reducing means catalytically coats the fuel electrode plate 5 by immersing the fuel electrode plate 5 in a reducing solution L to cause a reduction reaction (hydrogen gas generation) in the fuel electrode plate 5. be. Also, 7
is a magnetic stirrer provided at the bottom of the closed container 10 for stirring the solution. Note that 11 is a drain valve that opens and closes a solution discharge path, and 12 is an exhaust gas valve interposed in the exhaust gas path from the closed container 10. Also, 8 is pure water for cleaning (cleaning water Q)
The cleaning water from this tank 8 is supplied into the closed container 10 through a pipe. Note that 13 is a valve installed in the pipe, and 14 is a valve for removing gas from the tank 8. This tank 8 constitutes a cleaning water supply means 20, and the means 20
Cleaning water for cleaning the fuel electrode plate 5 is supplied into the closed container 10 by the cleaning water. Inert gas ( N2 gas, etc.)
The inert gas supply means 30 is connected to the lower part of the closed container 10 and the tank 8 through pipes branched from a supply source (not shown), and supplies inert gas to the closed container 10 and the tank 8. Each pipe has one on-off valve.
5 and 16 are interposed. Also, this means 30
As a result of supplying inert gas into the reducing solution L, the closed container 10 is filled with inert gas. An inert gas is also supplied to the cleaning water Q in the tank 8, and the cleaning water Q is deaerated in the tank 8.
次に作用について説明する。 Next, the effect will be explained.
触媒の金属塩水溶液中に浸漬・乾燥した後の燃
料極板５を密閉容器１０中の還元性溶液Ｌに浸漬
すると、燃料極板５において水素ガスが発生する
還元反応が発生する。このとき、還元性溶液Ｌ中
には不活性ガス供給手段３０より不活性ガスを供
給している。還元反応終了後（触媒コーテイング
完了後）、ガイド６によつて燃料極板５を密閉容
器１０中上方に持ち上げ、排液バルブ１１を開と
して還元性溶液Ｌを排出する。このとき、密閉容
器１０中には不活性ガスが充填され続け排ガスバ
ルブ１２は閉としているため、溶液の排出を加速
される。該溶液排出後排液バルブ１１、バルブ１
４を閉とし、バルブ１３を開とする。その結果、
密閉容器１０内には充分に脱空気された洗浄水が
供給され、燃料極板５は洗浄水で浸漬する。この
後、図示していないマグネテイツクスターラによ
り撹拌子７を作動させ該洗浄水を撹拌し、燃料極
板５を洗浄する。その結果、該多孔質の燃料極板
５の細孔中に吸収されている水素は該極板５内か
ら除去される。なお、上記還元反応から洗浄まで
の期間中密閉容器１０中は不活性ガス供給手段３
０により不活性ガスが充填されている。また、こ
の洗浄処理後燃料極板５を大気中に取り出しても
触媒燃焼は発生しない。 When the fuel electrode plate 5 that has been immersed and dried in the metal salt aqueous solution of the catalyst is immersed in the reducing solution L in the closed container 10, a reduction reaction occurs in the fuel electrode plate 5 in which hydrogen gas is generated. At this time, an inert gas is supplied into the reducing solution L from the inert gas supply means 30. After the reduction reaction is completed (after the catalyst coating is completed), the fuel electrode plate 5 is lifted upward into the closed container 10 by the guide 6, and the drain valve 11 is opened to discharge the reducing solution L. At this time, since the closed container 10 continues to be filled with inert gas and the exhaust gas valve 12 is closed, the discharge of the solution is accelerated. After discharging the solution, drain valve 11, valve 1
4 is closed, and valve 13 is opened. the result,
Sufficiently deaerated cleaning water is supplied into the closed container 10, and the fuel electrode plate 5 is immersed in the cleaning water. Thereafter, the stirring bar 7 is operated by a magnetic stirrer (not shown) to stir the cleaning water, thereby cleaning the fuel electrode plate 5. As a result, hydrogen absorbed in the pores of the porous fuel electrode plate 5 is removed from within the electrode plate 5. Note that during the period from the reduction reaction to cleaning, the inert gas supply means 3 is kept in the closed container 10.
0 is filled with inert gas. Further, even if the fuel electrode plate 5 is taken out into the atmosphere after this cleaning treatment, catalytic combustion does not occur.
以上説明してきたように、この考案によれば、
還元反応から洗浄までを密閉容器中で（不活性ガ
ス雰囲気中で）行うようにしたため、水素ガスを
燃料極板から充分に除去することができ、触媒燃
焼を防止できる結果、触媒コーテイングのバラツ
キを大幅に改善することができた（従来に比して
40％以上の改善効果が生じる）。 As explained above, according to this idea,
Since the process from reduction reaction to cleaning is carried out in a closed container (in an inert gas atmosphere), hydrogen gas can be sufficiently removed from the fuel electrode plate, preventing catalytic combustion and reducing variations in the catalyst coating. We were able to make a significant improvement (compared to before).
(improvement effect of 40% or more occurs).
図面はこの考案に係る触媒コーテイング後処理
装置の一実施例を示す概略全体図である。
５……燃料極板（基体）、１０……密閉容器、
２０……洗浄水供給手段、３０……不活性ガス供
給手段、Ｌ……還元性溶液、Ｑ……洗浄水。
The drawing is a schematic overall view showing one embodiment of the catalyst coating post-treatment device according to the invention. 5... Fuel electrode plate (substrate), 10... Sealed container,
20...Cleaning water supply means, 30...Inert gas supply means, L...Reducing solution, Q...Cleaning water.
Claims (1)
料極板を内部に保持する密閉容器と、該容器中に
還元性溶液を供給して該燃料極板に還元反応を生
じさせることにより触媒コーテイングする還元手
段と、該コーテイング後の燃料極板を洗浄する洗
浄水を該容器中に供給する洗浄水供給手段と、を
備えた酸性燃料電池用燃料極板の触媒コーテイン
グ後処理装置にあつて、前記還元性溶液、洗浄水
に不活性ガスを供給して還元反応から洗浄までの
間密閉容器中に不活性ガスを充填する不活性ガス
供給手段を設けたことを特徴とする酸性燃料電池
用燃料極板の触媒コーテイング後処理装置。 A closed container that holds a fuel electrode plate that has been immersed in an aqueous solution of a metal salt of a catalyst and dried, and a catalyst coating that is applied by supplying a reducing solution into the container to cause a reduction reaction on the fuel electrode plate. A post-treatment device for catalytic coating of a fuel electrode plate for an acidic fuel cell, comprising a reducing means for cleaning the coated fuel electrode plate, and a washing water supply means for supplying washing water into the container to wash the coated fuel electrode plate, A fuel for an acidic fuel cell, characterized in that an inert gas supply means is provided for supplying an inert gas to the reducing solution and the cleaning water and filling the airtight container with the inert gas from the reduction reaction to the cleaning. Catalytic coating post-treatment equipment for electrode plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1982196744U JPS59103372U (en) | 1982-12-28 | 1982-12-28 | Catalyst coating post-treatment device for fuel electrode plates for acidic fuel cells |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1982196744U JPS59103372U (en) | 1982-12-28 | 1982-12-28 | Catalyst coating post-treatment device for fuel electrode plates for acidic fuel cells |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59103372U JPS59103372U (en) | 1984-07-11 |
| JPS6316131Y2 true JPS6316131Y2 (en) | 1988-05-09 |
Family
ID=30421930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1982196744U Granted JPS59103372U (en) | 1982-12-28 | 1982-12-28 | Catalyst coating post-treatment device for fuel electrode plates for acidic fuel cells |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59103372U (en) |
-
1982
- 1982-12-28 JP JP1982196744U patent/JPS59103372U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59103372U (en) | 1984-07-11 |
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