JPH0394086A - Electrochemical oxygen separator - Google Patents
Electrochemical oxygen separatorInfo
- Publication number
- JPH0394086A JPH0394086A JP1229033A JP22903389A JPH0394086A JP H0394086 A JPH0394086 A JP H0394086A JP 1229033 A JP1229033 A JP 1229033A JP 22903389 A JP22903389 A JP 22903389A JP H0394086 A JPH0394086 A JP H0394086A
- Authority
- JP
- Japan
- Prior art keywords
- oxygen
- anode
- cathode
- iridium
- voltage
- 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
- 239000001301 oxygen Substances 0.000 title claims abstract description 55
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 55
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 54
- 238000000926 separation method Methods 0.000 claims abstract description 20
- 229910052741 iridium Inorganic materials 0.000 claims abstract description 13
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000003014 ion exchange membrane Substances 0.000 claims abstract description 8
- 239000007789 gas Substances 0.000 claims description 4
- 239000010405 anode material Substances 0.000 claims 1
- 239000007784 solid electrolyte Substances 0.000 claims 1
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 abstract description 22
- 229910052697 platinum Inorganic materials 0.000 abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 abstract description 4
- 239000010936 titanium Substances 0.000 abstract description 4
- 229910052719 titanium Inorganic materials 0.000 abstract description 4
- 229910052799 carbon Inorganic materials 0.000 abstract description 3
- 239000003054 catalyst Substances 0.000 abstract description 3
- 238000007772 electroless plating Methods 0.000 abstract description 3
- 238000012856 packing Methods 0.000 abstract description 3
- 239000011230 binding agent Substances 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 abstract description 2
- 239000008246 gaseous mixture Substances 0.000 abstract 1
- 238000007731 hot pressing Methods 0.000 abstract 1
- 239000012528 membrane Substances 0.000 abstract 1
- -1 polyfluoroethylene Polymers 0.000 abstract 1
- 238000000034 method Methods 0.000 description 5
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical group O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 3
- 238000002848 electrochemical method Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000002808 molecular sieve Substances 0.000 description 2
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 102100023734 G protein-coupled receptor kinase 4 Human genes 0.000 description 1
- 101000829481 Homo sapiens G protein-coupled receptor kinase 4 Proteins 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002926 oxygen Chemical class 0.000 description 1
- 230000036284 oxygen consumption Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は酸素を含む混合気体がら酸素のみを分離除去あ
るいは分離供給ずるための電気化学的酸素分離装置に係
わり、酸素の分離除去を目的とする場合には脱酸素装置
として、酸素の分離供給を目的とする場合には酸素富化
装置として機能する。[Detailed Description of the Invention] Industrial Application Field The present invention relates to an electrochemical oxygen separation device for separating and removing or separately supplying only oxygen from a mixed gas containing oxygen, and the present invention relates to an electrochemical oxygen separation device for separating and supplying only oxygen from a mixed gas containing oxygen. When the purpose is to separate and supply oxygen, it functions as an oxygen enrichment device.
従来の技術とその課題
空気から酸素を分離する方法としては深冷法，モレキュ
ラーシーブ法及び電気化学法が実用化されている。深冷
法は工業的な大規模分離に適し、モレキュラーシーブ法
と電気化学法は中，小規模分離に適している。Conventional technologies and their challenges Cryogenic methods, molecular sieve methods, and electrochemical methods have been put into practical use as methods for separating oxygen from air. The cryogenic method is suitable for large-scale industrial separations, while the molecular sieve method and electrochemical method are suitable for medium- to small-scale separations.
特に電気化学法は装置の小形化が可能なこと、電力効率
が大きいこと、空気中に含まれる他のカスの影響を受け
にくいこと、分離されたカスが純酸素であること、騒音
が小さいことなどの理由から最近とみに注目されるよう
になった。In particular, the electrochemical method has the following advantages: it is possible to miniaturize the device, it has high power efficiency, it is not easily affected by other dust contained in the air, the separated dust is pure oxygen, and there is little noise. For these reasons, it has recently started to attract attention.
この電気化学的酸素分離装殴はイオン交換膜の片面に陰
極を、他面に陽極を接合した電気化学セルの陽極開に純
水を供給し、陰極測に空気を供給しながら両電極間に直
流電圧を印加すると陰極で０２ （空気中） ＋ ４
Ｈ ＋＋ ４ ｅ →２ Ｈ ２ ０陽極で２Ｈ２０−
０２（純酸素）＋４Ｈ４＋４ｅ全体で０２（空気中）→
０２（純酸素）なる反応が起こり、陰極測の酸素のみが
陽極側に移動するもので、陰極での酸素消費を利用すれ
ば脱酸素装置として、また陽極での酸素発生を利用ずれ
ば酸素富化装置として機能ずる。This electrochemical oxygen separation equipment supplies pure water to the anode opening of an electrochemical cell, which has a cathode on one side of an ion exchange membrane and an anode on the other, and air between the two electrodes while supplying air to the cathode. When DC voltage is applied, the voltage at the cathode is 02 (in air) + 4
H ++ 4 e → 2H20- with 2H20 anode
02 (pure oxygen) + 4H4 + 4e total 02 (in air) →
02 (pure oxygen) reaction occurs, and only the oxygen measured at the cathode moves to the anode side.If the oxygen consumption at the cathode is used, it can be used as a deoxidizer, and if the oxygen generation at the anode is used, it can be used as an oxygen enrichment device. It functions as a conversion device.
この時、電気化学セル還元すれば酸素分離セルでの酸素
発生量は両電極間に流れた電流値に比例し、ＩＡｈ当り
２１０ｃｃ （ ０℃，１気圧）である。At this time, if electrochemical cell reduction is performed, the amount of oxygen generated in the oxygen separation cell is proportional to the value of the current flowing between both electrodes, and is 210 cc (0° C., 1 atm) per IAh.
一方セル電圧は、白金などの触媒金属を担持したカーボ
ンを陰極とし、多孔性の白金を陽極とする従来の酸素分
離セルの場合、電流密度が２０Ｏｎ＋Ａ／ｃｍ２のとき
約１．４５Ｖである。すなわち、単位電力量当りの酸素
発《Ｌ量は１４４．８ｃｃ／旧）（０℃，１気圧）であ
る。かかる装置を用いて空気から酸素を分離する場合上
述の単位電力量当りの酸素発生量すなわち電力効率は装
置のランニンクコストを左右ずる極めて重要な因子であ
る。On the other hand, in the case of a conventional oxygen separation cell in which carbon supporting a catalyst metal such as platinum is used as a cathode and porous platinum is used as an anode, the cell voltage is about 1.45 V when the current density is 20 On+A/cm2. That is, the oxygen output per unit electric energy (L amount is 144.8 cc/old) (0° C., 1 atmosphere). When such an apparatus is used to separate oxygen from air, the above-mentioned amount of oxygen generated per unit electric power, that is, power efficiency, is an extremely important factor that influences the running cost of the apparatus.
本発明は電気化学セルのセル電圧を低くすることによっ
て電力効率を高めた電気化学的酸素分離装置を提供せん
とずるしのである。The present invention seeks to provide an electrochemical oxygen separation device with increased power efficiency by lowering the cell voltage of the electrochemical cell.
課題を解決ずるための手段
前述した如く、従来の酸素分離セルの陽極はイオン交換
膜の片面に無電解メッキ法で接合した多孔・ｔＪＩ：の
自金車極であったが、セル電圧の低下を１」的とする本
発明では、陽極として酸素過電圧の低いイリジウムを用
いる。電気化学セルの陽極にイリジウムを用いた例とし
ては、水素と酸素を得る目的の水電解セルにおいて、例
えは特開昭５７−１３４５８６号や特開昭６０−１６２
７８０号などにみられるが、空気から酸素を分離する目
的の酸素分離セルに採用された例はない。Means for Solving the Problems As mentioned above, the anode of the conventional oxygen separation cell was a porous tJI self-metallic electrode bonded to one side of the ion exchange membrane by electroless plating, but this caused a drop in cell voltage. In the present invention, which aims at 1', iridium, which has a low oxygen overvoltage, is used as the anode. Examples of using iridium in the anode of an electrochemical cell include JP-A-57-134586 and JP-A-60-162 in water electrolysis cells for the purpose of obtaining hydrogen and oxygen.
No. 780, but there is no example of this being used in an oxygen separation cell for the purpose of separating oxygen from air.
白金にくらべてイリジウムは酸素の過電圧か３００へ−
４０Ｏｎ＋Ｖ小さいため、イリジウムを用いた酸素分離
セルは白金を用いたセルより３００〜４００＋ｎＶの省
電力が可能となる。Compared to platinum, iridium has an oxygen overvoltage of 300 -
Since it is 40 On+V smaller, an oxygen separation cell using iridium can save power by 300 to 400+ nV compared to a cell using platinum.
実施例 以下本発明の一実施例について詳述する。Example An embodiment of the present invention will be described in detail below.
まず、大きさか１５０ ｘ１５０ （ｎｕｎ）のイオ
ン交換膜（商品名ナフィオン−１１７）の片面に、特開
昭５７−１３４５８６号実施例３の場合と同様無電解メ
ッキによりイリジウムを１００ ｘ１００（ｔｎｍ）の
大きさで０．５〜４．０ＩＩｌｇ／ＣＩＩ１２になるよ
うに接合した後、他面に白金を担持させたカーホン粉末
と結着剤としてのボリテ１〜ラフルオ）］エチレンとの
混合物を熟プレスによりゃはり１００ Ｘ１００（ＩＴ
ＩＴＩ１）の大きさで接合した電極一イオン交換膜接合
体を製作した。この接合体を用いた酸素分離セルの断面
構造を第１図に示す。図において１はイオン交換膜、２
は陽極となるイリジウム電極、３は陰極となる白金触媒
イ・１カーホン電極、４，４′は集電網、５はチタン製
の陽極集電板、６はチタン製の陰極集電板、７はパッキ
ンである。First, 100 x 100 (tnm) of iridium was applied to one side of an ion exchange membrane (trade name: Nafion-117) with a size of 150 x 150 (nun) by electroless plating as in Example 3 of JP-A-57-134586. After bonding so that the size is 0.5 to 4.0 IIlg/CII12, a mixture of carphone powder with platinum supported on the other side and ethylene as a binder is pressed using a dry press. Jahari 100 X100 (IT
An electrode-ion-exchange membrane assembly with a size of ITI1) was fabricated. The cross-sectional structure of an oxygen separation cell using this assembly is shown in FIG. In the figure, 1 is an ion exchange membrane, 2
is an iridium electrode that serves as an anode, 3 is a platinum catalyst I.1 carbon electrode that is a cathode, 4 and 4' are current collection networks, 5 is an anode current collector plate made of titanium, 6 is a cathode current collector plate made of titanium, and 7 is a cathode current collector plate made of titanium. It's the packing.
純水供給口８から純水を、空気供給口１０から空気を供
給しながら陽極集電板５と陰極集電板６との間に直流電
圧を印加すると陰極３で酸素が消費され陽極２で酸素が
発生ずる。このとき酸素を消費された陰極開の空気は空
気導出口１１から、また、陽極で発生した酸素は水と共
に酸素導出口９からそれぞれ系外へ排出される。When a DC voltage is applied between the anode current collector plate 5 and the cathode current collector plate 6 while supplying pure water from the pure water supply port 8 and air from the air supply port 10, oxygen is consumed at the cathode 3 and oxygen is consumed at the anode 2. Oxygen is generated. At this time, the cathode-open air that has consumed oxygen is discharged to the outside of the system from the air outlet 11, and the oxygen generated at the anode is discharged from the oxygen outlet 9 together with water.
第２図は本発明酸素分離セルＡの電流・電圧特牲を従来
の白金電極を用いたセルＢの特性と比較して示した図で
ある。第２図から陽極にイリジウムを用いたセル八の電
圧は従来の白金を用いたセルＩ３にくらべて約４００＋
＋＋Ｖ低くなることがわかる。FIG. 2 is a diagram showing the current/voltage characteristics of oxygen separation cell A of the present invention in comparison with the characteristics of cell B using a conventional platinum electrode. From Figure 2, the voltage of cell 8 using iridium for the anode is about 400+ compared to cell I3 using conventional platinum.
It can be seen that ++V becomes lower.
５
発明の効果
上述した如く、陽極にイリジウムを採用した酸素分離セ
ルは低電圧で作動ずるため、このセルを用いた電気化学
的酸素分離装置は従来装置にくらべて大幅な省電力とな
る。5. Effects of the Invention As mentioned above, since the oxygen separation cell employing iridium for the anode operates at low voltage, an electrochemical oxygen separation device using this cell can achieve significant power savings compared to conventional devices.
例えは電流密度か２０Ｏｎ＋＾／ｃ＋ｎ２の場合、セル
電圧は１．０５Ｖとなり、そのときの単位電力量当りの
酸素発生量は２００ｃｃ／Ｗｈとなる。ずなわち従来の
装置の１４４．８ｃｃ／Ｗｈに比較して３８％の効率ア
ップとなる。For example, if the current density is 20On+^/c+n2, the cell voltage will be 1.05V, and the amount of oxygen generated per unit electric energy will be 200cc/Wh. That is, the efficiency is increased by 38% compared to 144.8cc/Wh of the conventional device.
第１図は本発明酸素分離セルの断面図、第２図は本発明
酸素分離セルにおける電流密度と端子電圧の関係を従来
の白金電極使用の場合と比較して示した図である。
１・・イオン交換膜、２・・・イリジウム陽極、３・・
・力−ボン陰極、４，４′・・・集電網、５・・・陽極
集電板、６・・・陰極集電板、７・・・パッキン、８・
・・純水供給］］、９・・・酸素導出口、１０・・・空
気供給口、１１・・・空気導出口。
６FIG. 1 is a sectional view of the oxygen separation cell of the present invention, and FIG. 2 is a diagram showing the relationship between current density and terminal voltage in the oxygen separation cell of the present invention in comparison with a conventional case using platinum electrodes. 1...Ion exchange membrane, 2...Iridium anode, 3...
・Force-Bon cathode, 4, 4'... Current collector network, 5... Anode current collector plate, 6... Cathode current collector plate, 7... Packing, 8.
...Pure water supply]], 9...Oxygen outlet, 10...Air supply port, 11...Air outlet. 6
Claims (1)
オン交換膜と酸素発生に有効な陽極とを一体に接合して
なる電気化学セルの陰極に酸素を含む混合気体を供給し
ながら両電極間に直流電圧を印加し陽極で発生する酸素
を前記混合気体から分離するようにした電気化学的酸素
分離装置において、電気化学セルの陽極材料としてイリ
ジウムを用いたことを特徴とする電気化学的酸素分離装
置。1. While supplying a mixed gas containing oxygen to the cathode of an electrochemical cell, which is made by integrally joining a cathode effective for electrolytic reduction of oxygen, an ion exchange membrane serving as a solid electrolyte, and an anode effective for oxygen generation, both electrodes An electrochemical oxygen separation device in which oxygen generated at an anode is separated from the mixed gas by applying a DC voltage between the electrodes, characterized in that iridium is used as an anode material of the electrochemical cell. Separation device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1229033A JPH0394086A (en) | 1989-09-04 | 1989-09-04 | Electrochemical oxygen separator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1229033A JPH0394086A (en) | 1989-09-04 | 1989-09-04 | Electrochemical oxygen separator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0394086A true JPH0394086A (en) | 1991-04-18 |
Family
ID=16885693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1229033A Pending JPH0394086A (en) | 1989-09-04 | 1989-09-04 | Electrochemical oxygen separator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0394086A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113426261A (en) * | 2021-08-26 | 2021-09-24 | 湖南大学 | Method for electrochemically removing oxygen in mixed gas |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55136101A (en) * | 1979-04-09 | 1980-10-23 | Toray Ind Inc | Solid electrolyte oxygen pump |
| JPS5937754A (en) * | 1982-08-26 | 1984-03-01 | Nec Corp | Multiple address calling device with overflow control |
| JPS6112033A (en) * | 1984-06-27 | 1986-01-20 | Sony Corp | Semiconductor device |
| JPS6352119A (en) * | 1986-08-22 | 1988-03-05 | Ricoh Co Ltd | Liquid crystal element |
-
1989
- 1989-09-04 JP JP1229033A patent/JPH0394086A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55136101A (en) * | 1979-04-09 | 1980-10-23 | Toray Ind Inc | Solid electrolyte oxygen pump |
| JPS5937754A (en) * | 1982-08-26 | 1984-03-01 | Nec Corp | Multiple address calling device with overflow control |
| JPS6112033A (en) * | 1984-06-27 | 1986-01-20 | Sony Corp | Semiconductor device |
| JPS6352119A (en) * | 1986-08-22 | 1988-03-05 | Ricoh Co Ltd | Liquid crystal element |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113426261A (en) * | 2021-08-26 | 2021-09-24 | 湖南大学 | Method for electrochemically removing oxygen in mixed gas |
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