CN1510171A - Oxygen generation by ion conductive polymer modified electrodes and apparatus thereof - Google Patents
Oxygen generation by ion conductive polymer modified electrodes and apparatus thereof Download PDFInfo
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- CN1510171A CN1510171A CNA021585644A CN02158564A CN1510171A CN 1510171 A CN1510171 A CN 1510171A CN A021585644 A CNA021585644 A CN A021585644A CN 02158564 A CN02158564 A CN 02158564A CN 1510171 A CN1510171 A CN 1510171A
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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
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- 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
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
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Abstract
A process for preparing oxygen by use of ionic electric-conducting polymer modified electrode features that an oxygen generating unit is composed of the ionic electric-conducting polymer modified oxygen electrode, electrolyte and inertial electrode, and said oxygen electrode is a porous gas diffusing one consisting of catalytic layer, current collector and water-proof layer and covered by an ionic electric-conducting polymer. Its equipment is composed of said oxygen generator, power supply and control circuit board. Its advantages are high reliability, small size, simple structure and low cost.
Description
Affiliated field:
So the invention belongs to a kind of method for producing oxygen through, particularly a kind of method for producing oxygen through and equipment therefor that utilizes ionic conductive polymer to modify oxygen electrode.
Background technology:
At present, the man enterprise of domestic existing number produces the electro-chemistry oxygen-producing machine, its core is to adopt porous gas diffusive electrode, strong alkaline electrolytes such as KOH, noble electrode to constitute the gas generating unit, and many reports and patent application arranged, as " electrochemistry does not have the hydrogen oxygenerator ", " electrochemistry oxygen, nitrogen generator unit ", part producing producer is arranged also in the similar patent of application, as lattice difficult to understand, the bright board in Fujian etc.The air electrode that adopts in these patents and the production product has two classes, one class adopts stable performance but the polyethylene porous gas diffusive electrode of current efficiency difference is made, and a class adopts poor stability but the high polytetrafluoroethylstephanoporate stephanoporate gas diffusion electrode of current efficiency is made.Owing to adopt porous gas diffusive electrode, all multifactor counter electrode such as the active oxygen that produces in the work, air scour destroy big, cause pole catalyze layer to come off or waterproof layer is peeled off.Under high current density, as current density greater than 80mA/cm
2The time, electrolyzer heating is bigger, and the active oxygen amount of output is many, counter electrode destructive extremely strong.The porous gas diffusive electrode of domestic present production is only 100-200 hour following life-span of high current density, when current density greater than 100mA/cm
2The time, the porous gas diffusive electrode life-span was generally 30-50 hour.For this reason, low current density during domestic electro-chemistry oxygen-producing machine adopts basically is generally 10-50mA/cm
2, thereby the electro-chemistry oxygen-producing body that domestic design is produced is long-pending greatly, efficient is low, oxygen-producing amount is little.
Summary of the invention:
Purpose of the present invention just is to overcome the deficiency that above-mentioned prior art exists, and the method for producing oxygen through and the equipment therefor that provide a kind of ionic conductive polymer to modify oxygen electrode, the oxygen making amount of this method for producing oxygen through is big, the life-span of use electrode is long; This device volume is little, efficient is high, oxygen-producing amount is big.
Technical scheme of the present invention is: a kind of method for producing oxygen through that utilizes ionic conductive polymer to modify oxygen electrode, it is characterized in that: modify oxygen electrode, ionogen and noble electrode with the ionic conductive polymer in atresia, few hole and constitute the gas generating unit, produce oxygen; It is to cover one deck ionic conductive polymer on the porous gas diffusive electrode of being made up of Catalytic Layer, collector and waterproof layer again that this ionic conductive polymer is modified oxygen electrode;
The mineral ion electrical conductor can mix in the above-mentioned ionic conductive polymer.Above-mentioned ionogen can adopt alkaline solution, also can adopt salts solution.
A kind of according to the above-mentioned used oxygenerator of method for producing oxygen through that utilizes ionic conductive polymer to modify oxygen electrode, it is characterized in that: form by gas generating unit, power supply and control circuit board; Gas generating unit comprises by ionic conductive polymer modifies gas generating unit, filtering layer and the liquid feeding bottle that oxygen electrode, ionogen and noble electrode constitute; Ionic conductive polymer is modified oxygen electrode and is made up of Catalytic Layer, collector, waterproof layer and ionic conductive polymer decorative layer; Filtering layer is made up of waterproof ventilative layer, borax layer and active carbon layer successively; The input terminus of pilot circuit is connected with modified electrode, and output terminal is connected with the negative pole of power supply, and the positive pole of power supply is connected with noble electrode.
Above-mentioned pilot circuit is made up of voltage, current setting functional circuit, short-circuit protection function circuit, temperature, pressure control function circuit and flow Presentation Function parts.
Advantage of the present invention is: 1, dependable performance, because the ion conductive polymer layer guard electrode is arranged, but the gas electrode long time continuous working; 2, volume is little; Because can be at 100-140mA/cm
2High current density is work down, and the device volume of identical oxygen-producing amount is littler; 3, simple in structure, cost is low, is convenient to industrialization.
Description of drawings:
Fig. 1 is a functional block diagram of the present invention
Fig. 2 modifies the oxygen electrode synoptic diagram for ionic conductive polymer
Fig. 3 modifies the structural representation of oxygen electrode oxygenerator for ionic conductive polymer.
Fig. 4 is the electrical schematic diagram of pilot circuit
Embodiment:
As shown in Figure 1, 2: a kind of method for producing oxygen through that utilizes ionic conductive polymer to modify oxygen electrode is characterized in that: modify oxygen electrode 1, ionogen 2 and noble electrode 3 with the ionic conductive polymer in atresia, few hole and constitute the gas generating unit; It is to cover one deck ionic conductive polymer 7 again on the porous gas diffusive electrode of being made up of Catalytic Layer 4, collector 5 and waterproof layer 6 that ionic conductive polymer is modified oxygen electrode; The mineral ion electrical conductor can mix in the above-mentioned ionic conductive polymer.The principle of this electrode system oxygen is: modify one deck ionic conductive polymer on the gas diffusion electrode, both as ionogen, again as electrode protecting layer.During work, airborne oxygen forms H at the porous three phase boundary
2O
2And OH
-, OH
-Enter liquid electrolyte through ion exchange layer, on noble electrode, be reduced into the oxygen G﹠W.Because this electrode is atresia (or few hole) gas electrode, thereby has suppressed electrode " perspiration " and leakage.Because gas electrode is modified with ion conductive polymer layer, therefore suppressed the destruction of the active oxygen counter electrode of noble electrode generation.
As shown in Figure 2: this example is a kind of family expenses oxygen generating plant, and it is made up of gas generating unit, control circuit board and power supply.Gas generating unit comprises by the noble electrode 3 that adopts the porous nickel screen, adopts K
2CO
3Liquid electrolyte 2 and ionic conductive polymer modify gas generating unit, filtering layer and the liquid feeding bottle 11 that oxygen electrode is formed.Gas diffusion electrode 1 adopts tetrafluoroethylene and acetylene black is made waterproof layer 6, the carried by active carbon uhligite is made Catalytic Layer 4, porous nickel screen as collector 5, adopts perfluorinated sulfonic resin to mix a small amount of perfluorinated carboxylic acid resin as decorative layer 7; Power supply adopts 1.0-1.4V pressure limiting (it is following to be limited in 1.4V) rectifier switch power supply, maximum operating currenbt 80A; Filtering layer is made up of waterproof ventilative layer 8, borax layer 9 and active carbon layer 10; The formation of pilot circuit is by voltage, current setting functional circuit; The short-circuit protection function circuit; Temperature, pressure control function circuit and flow Presentation Function parts are formed.
This example oxygen generator design objective and parameter
1, gas production rate is calculated
Gas production rate can be calculated by faraday law:
Gas production rate Q=I
Always* t * 22.4/ (60 * F * N) (rise/minute)
Wherein: F=4 (migration electronic number)
N=26.8 (constant)
The t=hours
I
Always=total current number
With the formula abbreviation be: Q=3.48 * I
Always(ml/min)
2, gas generating unit voltage scope of design is between 1.0～1.4.
3, current density is determined according to the air electrode performance.Generally select 50～60mA/cm
2, this electrode selects 80～100mA/cm
2, be convenient to reduced volume.
4, working temperature: between the normal temperature to 50 ℃.
5, electrolytic solution: can select K
2CO
3, KOH, Na
2CO
3, NaOH, K
2SO
4Deng, KOH, NaOH alkalescence is strong, and difficult sealing, Na
2CO
3, K
2SO
4Efficient is low, so select K
2CO
3Best.Concentration is considered liquid evaporation 28% the most desirable, selects between the 23%-25%, and purity is high more good more, generally selects the AR level for use.This example uses Tianjin chemical reagent three AR of factory level anhydrous K
2CO
3Product, with distilled water diluting to 23% as electrolytic solution.
6, gas mixing:
The human body oxygen uptake is the 35%-40% oxygen enrichment, and purity was greater than 99.5% before the medical oxygen national Specification was mixed.
Mixed ratio: pure oxygen: air=1: 4.267 (36%)
Pure oxygen: air=1: 4.65 (35%)
This example adopts power supply:
With 1-1.4V power supply design oxygenerator, can produce oxygen enrichment and be used for health care:
Groove is pressed 1.25V, can be by 1 open plane electrolyzer, and total current 40A (maximum can to 80A).
Gas production rate: Q=3.48 * 40=139.2ml/min.
Being mixed is 36% oxygen enrichment: Q
L=Q * (1+4.267)=733.17ml/min.
7, the selection of power supply:
Adopt the pressure limiting constant current power supply, voltage and current is determined according to product design, voltage fluctuation＜0.5%.
8, control circuit board adopts conventional ECU.
Noble electrode should select that resistance is little, specific surface area is big, the sludge proof material, best adopt the streamline groove be coated with ruthenium titanium electrode, but price height.This example is selected nickel screen and nickel porous sheet for use.
Claims (4)
1, a kind of method for producing oxygen through that utilizes ionic conductive polymer to modify oxygen electrode is characterized in that: modify oxygen electrode, ionogen and noble electrode with the ionic conductive polymer in atresia, few hole and constitute the gas generating unit, produce oxygen; It is to cover one deck ionic conductive polymer on the porous gas diffusive electrode of being made up of Catalytic Layer, collector and waterproof layer again that this ionic conductive polymer is modified oxygen electrode;
2, the method for producing oxygen through that utilizes ionic conductive polymer to modify oxygen electrode according to claim 1, it is characterized in that: the mineral ion electrical conductor can mix in the above-mentioned ionic conductive polymer.Above-mentioned ionogen can adopt alkaline solution, also can adopt salts solution.
3, a kind of according to the above-mentioned used oxygenerator of method for producing oxygen through that utilizes ionic conductive polymer to modify oxygen electrode, it is characterized in that: form by gas generating unit, power supply and control circuit board; Gas generating unit comprises by ionic conductive polymer modifies gas generating unit, filtering layer and the liquid feeding bottle that oxygen electrode, ionogen and noble electrode constitute; Ionic conductive polymer is modified oxygen electrode and is made up of Catalytic Layer, collector, waterproof layer and ionic conductive polymer decorative layer; Filtering layer is made up of waterproof ventilative layer, borax layer and active carbon layer successively; The input terminus of pilot circuit is connected with modified electrode, and output terminal is connected with the negative pole of power supply, and the positive pole of power supply is connected with noble electrode.
4, according to claim 3 according to the above-mentioned used oxygenerator of method for producing oxygen through that utilizes ionic conductive polymer to modify oxygen electrode, it is characterized in that: above-mentioned pilot circuit is made up of voltage, current setting functional circuit, short-circuit protection function circuit, temperature, pressure control function circuit and flow Presentation Function parts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021585644A CN1510171A (en) | 2002-12-26 | 2002-12-26 | Oxygen generation by ion conductive polymer modified electrodes and apparatus thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021585644A CN1510171A (en) | 2002-12-26 | 2002-12-26 | Oxygen generation by ion conductive polymer modified electrodes and apparatus thereof |
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| Publication Number | Publication Date |
|---|---|
| CN1510171A true CN1510171A (en) | 2004-07-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA021585644A Pending CN1510171A (en) | 2002-12-26 | 2002-12-26 | Oxygen generation by ion conductive polymer modified electrodes and apparatus thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102719845A (en) * | 2012-07-13 | 2012-10-10 | 宜兴方晶科技有限公司 | Method and device for preparing tin methane sulfonate through hydrogen-free electrolysis |
| CN114361476A (en) * | 2021-12-06 | 2022-04-15 | 安徽熵卡科技有限公司 | Preparation method and application of gas diffusion electrode |
-
2002
- 2002-12-26 CN CNA021585644A patent/CN1510171A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102719845A (en) * | 2012-07-13 | 2012-10-10 | 宜兴方晶科技有限公司 | Method and device for preparing tin methane sulfonate through hydrogen-free electrolysis |
| CN114361476A (en) * | 2021-12-06 | 2022-04-15 | 安徽熵卡科技有限公司 | Preparation method and application of gas diffusion electrode |
| CN114361476B (en) * | 2021-12-06 | 2023-12-26 | 安徽熵卡科技有限公司 | Preparation method and application of gas diffusion electrode |
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