CN1041643C - Electrochemical generator capable of producing pure nitrogen and oxygen gases - Google Patents
Electrochemical generator capable of producing pure nitrogen and oxygen gases Download PDFInfo
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- CN1041643C CN1041643C CN93115931A CN93115931A CN1041643C CN 1041643 C CN1041643 C CN 1041643C CN 93115931 A CN93115931 A CN 93115931A CN 93115931 A CN93115931 A CN 93115931A CN 1041643 C CN1041643 C CN 1041643C
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Abstract
The present invention relates to an electrochemical generator for preparing pure nitrogen and oxygen gas, making use of a constant potential electrolysis to control the direct current of voltage which is equal to or larger than 1.5V. The present invention adopts a microporous film, for example, an asbestos film is used as the partition plate of two electrodes, a porous gas diffusing type oxygen electrode is used as a cathode, a nickel net is used as an anode, and the installation of the electrodes adopts a hard supporting structure. The generator can stably work under the differential pressure (1MPa) of a nitrogen and an oxygen gas chambers, avoid the hydrogen of the cathode being separated out and ensure that the pure nitrogen gas and oxygen gas prepared by the electrochemical generator can achieve 99.99%, and furthermore, the present invention has the advantages of simple structure and low cost, and the electrochemical generator for preparing the pure nitrogen and oxygen gas not only can be assembled into a small-scale gas generator, but also can be assembled into a large-scale pure nitrogen and oxygen gas preparing device for industrial production.
Description
The present invention relates to a kind of electrochemical apparatus, specifically provide a kind of employing potentiostatic electrolysis, be used to prepare the electrochemistry generating unit of nitrogen and carrier of oxygen.
The electrochemical generator of existing hydrogen, oxygen and rare gas element is mostly produced hydrogen and oxygen with the method for brine electrolysis, and produce nitrogen with air, Japanese Patent JP59 for example, 162,284 technology that provided.The electrolyzer of this producer is stayed with cationic exchange membrane and SPE electrode, sends water to anolyte compartment from water pot, and aerator pump pumps air into cathode compartment, produces nitrogen by making airborne oxygen in the way of negative electrode selective reduction.But the cationic exchange membrane of this equipment claimed costliness and SPE electrode.Also have report (Ger (East), 85,336 (cl, co 16), 20, Oct, 1971, App.WP 121/145,000,19Jan.1970), the electrolyzer that adopts solid electrolyte to constitute produces nitrogen from air, and produces the method for hydrogen from water vapor.But this method is removed the high solid electrolyte of call for bids, still needs with the input water vapor.Above-mentioned these technology all are to produce hydrogen-oxygen with the method for brine electrolysis simultaneously, so current consumption is big.
The purpose of this invention is to provide a kind of preparation oxygen simple in structure and the electrochemical generator of nitrogen.This producer gas generator is Miniaturizable but also can adapt to the suitability for industrialized production needs and prepare nitrogen, carrier of oxygen not only, and its cost is low, and is easy to operate, and energy consumption is low.
For achieving the above object, electrochemical generator of the present invention carries out bigger transformation to prior art, it utilizes the potentiostatic deposition method, it is characterized in that its adopts microporous membrane to make the division plate of two electrodes, can make nitrogen oxygen room steady operation under pressure reduction (can reach 1MPa), secondly, adopting porous gas dispersion pattern oxygen electrode is negative electrode, nickel screen is an anode, and electrode is installed a hard staying of machicolated form flat support plate and/or plane perforation plate and the conductive supporting bar or the conductive supporting pad of the metallic substance system of employing, promptly be added with the moon in the microporous membrane both sides, positive electrode, adopt above-mentioned hard supporting structure, make the electrode structure of the two poles of the earth formation zero pole span, both guaranteed the steady operation of electrode, can raise the efficiency again, cut down the consumption of energy.In addition, the constant potential that the present invention adopts should be controlled at≤1.5 volts, can avoid negative electrode to separate out hydrogen like this, guarantees to prepare the GN 2 and oxygen purity all can reach more than 99.99%.
It is the asbestos film of 800～1000 that the electrochemical generator of the invention described above, its microporous membrane can be stayed with the aperture, potassium titanate film or titanium dioxide film.Its metal machicolated form flat support plate and plane perforation plate can be stayed with stainless steel processing, and the area of its concave portions or bore portion can account for 20～70% of whole plate face.Conductive supporting bar or conductive supporting pad also can be made by stainless steel.Producer of the present invention can adopt single counter electrode to be prepared into small-sized nitrogen, carrier of oxygen producer according to actual needs, also can be assembled into the monopolar cell of many counter electrode, as the professional equipment of producing nitrogen, oxygen.Give further instruction below by example to structure of the present invention.
Accompanying drawing 1 is the structural representation of list to the oxygen oxide gas producer of electrolyzer formation.
Accompanying drawing 2 is structural representations of many oxygen oxide gas producers that electrolyzer is constituted.
Example 1 single nitrogen carrier of oxygen electrochemical generator to electrolyzer
Asbestos film with aperture 800 is a microporous membrane, is anode with 60 order nickel screens, is negative electrode with the porous gas oxygen electrode of fine silver.Be processed into the machicolated form flat support plate with stainless steel.Accompanying drawing 1 is the structural representation of this producer, shown in producer be that the one pole list is to electrolyzer.Among the figure, 1. microporous membrane; 2. anode; 3. porous gas dispersion pattern oxygen electrode negative electrode; 4. electrolytic solution import; 5. pneumatic pump and air intlet; 6. nitrogen outlet; 7. electrolytic solution bucket outlet; 8. anolyte and oxygen outlet; 9. electrolytic solution bucket; 10. electrolytic solution; 11. oxygen outlet; 12. constant potential device; 13. machicolated form stainless steel back up pad; 14. cathode compartment tensimeter.Stay with above-mentioned microporous membrane 1, electrode 2,3, and can be mounted to the one pole list to electrolyzer, promptly settle electrode 2,3, utilize machicolated form stainless steel back up pad 13 clamping electrodes 2,3 one-tenth hard support electrode structures in microporous membrane 1 both sides by structure shown in the accompanying drawing 1.Press accompanying drawing 1, and technology routinely, circuit, gas circuit can be installed, that the present invention makes in each system of liquid road is single to the electrolyzer electrochemical generator.During operation, the pneumatic pump input air is 120ml/min, and the cathode compartment pressure gauge reading is gauge pressure 0.4MPa, and the anolyte compartment is a normal pressure, and electrode face amasss 140cm
2, constant potential 1.5V.It produces the gas nitrogen gas purity is oxygen level≤24ppm, and oxygen purity is 99.99% (disregarding water vapor).
Example more than 2 is to electrolytic bath type nitrogen carrier of oxygen electrochemical generator
The asbestos film that with the aperture is 1000A is a microporous membrane, with 60 order nickel screens is anode, is negative electrode with ECNA (Dalian Inst of Chemicophysics, Chinese Academy of Sciences's production) type porous gas dispersion pattern oxygen electrode, and makes aperture Φ 2, stalk distance 1, the stainless steel perforation plate of thick 1mm and stainless steel conductive supporting bar.Accompanying drawing 2 is many structural representations that electrolyzer (2 pairs) electrolyzer constituted producer.Among the figure: 15. perforation plates; 16. support bar.Can be mounted to 2 pairs acyclic type electrolyzer and producer with reference to accompanying drawing 2 and example 1.Promptly settle electrode 2,3 respectively, constitute two pairs of electrolyzers, utilize perforation plate 15 and support bar 16 that the electrode 2,3 of electrolyzer is clamped into hard supporting structure, two anode electrolytic cell 2 adjacent settings again in the both sides of two microporous membranes.When operation, pneumatic pump input air 300ml/min, cathode compartment tensimeter 14 shows gauge pressure 0.4MPa, electrode face amasss 280 (140 * 2) cm
2, constant potential 1.5V.Its nitrogen outlet purity is 99.99%, and oxygen outlet purity is 99.99% (disregarding water vapor).
Example 3 is single to electrolyzer nitrogen carrier of oxygen electrochemical generator
Press example 1 described condition, adopting 800 potassium titanate films to replace the asbestos film of 800 respectively is that microporous membrane is made producer of the present invention, and it produces gas nitrogen gas purity oxygen level≤24PVm, and oxygen purity is 99.99% (disregarding water vapor).
Example 4 is single to electrolyzer nitrogen carrier of oxygen electrochemical generator
Press example 1 described condition, adopting 800 titanium dioxide films to replace the asbestos film of 800 respectively is that microporous membrane is made producer of the present invention, and it produces gas nitrogen gas purity oxygen level≤24PVm, and oxygen purity is 99.99% (disregarding water vapor).
By above-mentioned example, producer of the present invention uses microporous membrane to make the air chamber division plate, can bear the pressure reduction that reaches 1MPa and gas-blowing phenomenon does not take place, stay simultaneously and use hard supporting structure, make it to constitute the electrode structure of zero pole span, guarantee the steady operation of electrode, reduce power consumption, increase work efficiency.Simultaneously,, can avoid cathode hydrogen to separate out fully, improve the purity of generation gas owing to adopt constant potential≤1.5 volt.In addition, this generator architecture is simple, and cost is low, working stability, and aerogenesis body purity height not only can be assembled into small-sized producer gas generator, also can be made into the specific equipment of industrial production nitrogen, carrier of oxygen.
Claims (2)
1. a potentiostatic electrolysis prepares the electrochemical generator of nitrogen and oxygen, it is characterized in that its adopts microporous membrane to make the division plate of two electrodes, staying with porous gas dispersion pattern oxygen electrode is negative electrode, nickel screen is an anode, and it is to adopt hard supporting structure that electrode is installed, promptly be added with the yin, yang electrode in the microporous membrane both sides, utilize machicolated form flat support plate and/or plane perforation plate and conductive supporting bar or conductive supporting pad to make negative electrode, microporous membrane, anode be compacted into the connecting structure of hard support, constant potential should be controlled at≤and 1.5 volts.
2. according to the described producer of claim 1, it is characterized in that it is the asbestos film of 800～1000 that its microporous membrane adopts the aperture, potassium titanate film or titanium dioxide film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93115931A CN1041643C (en) | 1993-11-27 | 1993-11-27 | Electrochemical generator capable of producing pure nitrogen and oxygen gases |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93115931A CN1041643C (en) | 1993-11-27 | 1993-11-27 | Electrochemical generator capable of producing pure nitrogen and oxygen gases |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1103439A CN1103439A (en) | 1995-06-07 |
| CN1041643C true CN1041643C (en) | 1999-01-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN93115931A Expired - Fee Related CN1041643C (en) | 1993-11-27 | 1993-11-27 | Electrochemical generator capable of producing pure nitrogen and oxygen gases |
Country Status (1)
| Country | Link |
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| CN (1) | CN1041643C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013185169A1 (en) * | 2012-06-12 | 2013-12-19 | Monash University | Gas permeable electrode and method of manufacture |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59162284A (en) * | 1983-03-07 | 1984-09-13 | Japan Storage Battery Co Ltd | Method for generating hydrogen, oxygen and inert gas |
| US4539086A (en) * | 1983-08-31 | 1985-09-03 | Japan Storage Battery Company Limited | Oxygen concentration controlling method and system |
-
1993
- 1993-11-27 CN CN93115931A patent/CN1041643C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59162284A (en) * | 1983-03-07 | 1984-09-13 | Japan Storage Battery Co Ltd | Method for generating hydrogen, oxygen and inert gas |
| US4539086A (en) * | 1983-08-31 | 1985-09-03 | Japan Storage Battery Company Limited | Oxygen concentration controlling method and system |
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| Publication number | Publication date |
|---|---|
| CN1103439A (en) | 1995-06-07 |
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