CN220715804U - Hydrogen production device by hydrolysis of low-concentration sodium borohydride solution - Google Patents
Hydrogen production device by hydrolysis of low-concentration sodium borohydride solution Download PDFInfo
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- CN220715804U CN220715804U CN202322006148.3U CN202322006148U CN220715804U CN 220715804 U CN220715804 U CN 220715804U CN 202322006148 U CN202322006148 U CN 202322006148U CN 220715804 U CN220715804 U CN 220715804U
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- sodium borohydride
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- 239000001257 hydrogen Substances 0.000 title claims abstract description 73
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 73
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 72
- 229910000033 sodium borohydride Inorganic materials 0.000 title claims abstract description 31
- 239000012279 sodium borohydride Substances 0.000 title claims abstract description 31
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 26
- 238000006460 hydrolysis reaction Methods 0.000 title claims abstract description 24
- 230000007062 hydrolysis Effects 0.000 title claims abstract description 21
- 239000007788 liquid Substances 0.000 claims abstract description 182
- 239000002699 waste material Substances 0.000 claims abstract description 57
- 238000000926 separation method Methods 0.000 claims abstract description 54
- 238000006243 chemical reaction Methods 0.000 claims abstract description 47
- 239000002994 raw material Substances 0.000 claims abstract description 41
- 238000004891 communication Methods 0.000 claims description 6
- 230000000087 stabilizing effect Effects 0.000 claims description 6
- 239000006260 foam Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 8
- 230000009286 beneficial effect Effects 0.000 description 11
- 239000003054 catalyst Substances 0.000 description 10
- 239000000446 fuel Substances 0.000 description 7
- 238000001914 filtration Methods 0.000 description 5
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 4
- 239000003513 alkali Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 229910000510 noble metal Inorganic materials 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000012535 impurity Substances 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- YZCKVEUIGOORGS-OUBTZVSYSA-N Deuterium Chemical compound [2H] YZCKVEUIGOORGS-OUBTZVSYSA-N 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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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
- 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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- Fuel Cell (AREA)
Abstract
The utility model discloses a low-concentration sodium borohydride solution hydrolysis hydrogen production device, which comprises a raw material tank, a reaction tank, a waste liquid tank and a gas-liquid separation tank, wherein the raw material tank is communicated with the reaction tank through a pipeline, a waste liquid outlet on the side surface of the reaction tank is communicated with the waste liquid tank through a pipeline, the top of the reaction tank is communicated with the gas-liquid separation tank through a pipeline, the bottom of the gas-liquid separation tank is communicated with the waste liquid tank through a pipeline, and a hydrogen outlet is arranged at the top of the gas-liquid separation tank. The hydrogen production device has low cost, high hydrogen storage density and simple and convenient hydrogen post-treatment process.
Description
Technical Field
The utility model belongs to the technical field of hydrogen production, and particularly relates to a low-concentration sodium borohydride solution hydrolysis hydrogen production device.
Background
Fuel cells are power generation devices that directly convert chemical energy stored in fuel into electric energy through an electrochemical reaction. To realize the large-scale application of fuel cells, high-density storage and rapid and safe provision of pure hydrogen are important problems to be solved.
The sodium borohydride hydrolysis hydrogen production is a relatively popular field hydrogen production technology at present, and has the advantages that: high hydrogen storage density, convenient control and regulation of speed and low requirement on water quality. At present, most hydrogen production devices adopt sodium borohydride solution with higher concentration to hydrolyze to produce hydrogen (generally more than 10wt percent), the temperature of a reaction zone is higher, the produced hydrogen has higher initial temperature and can carry more water vapor, the devices are required to be provided with heat exchangers, external cooling water is introduced to exchange heat to cool the hydrogen and the water vapor and perform gas-liquid separation so as to supply air to the outside, and the process is more complicated; in addition, for higher concentration sodium borohydride solutions, it is generally necessary to add a certain amount of alkali such as NaOH, KOH, etc. to the solution to inhibit self-hydrolysis of sodium borohydride, which on the one hand is somewhat corrosive to the device, and in addition, naOH and NaBO are entrained in the hydrogen gas 2 If the alkaline impurities enter the fuel cell, the alkaline impurities have a great influence on the performance and the service life of the cell, so that the prepared hydrogen can be supplied to the fuel cell after being sufficiently purified.
Disclosure of Invention
Aiming at the prior art, the utility model provides a low-concentration sodium borohydride solution hydrolysis hydrogen production device, which aims to solve the problems that the existing sodium borohydride solution hydrolysis hydrogen production device needs a heat exchanger, needs alkali to be added to inhibit self-hydrolysis, has a complex process and damages the device.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: the utility model provides a low concentration sodium borohydride solution hydrolysis hydrogen plant, including head tank, retort, waste liquid jar and gas-liquid separation jar, the head tank passes through the pipeline intercommunication with the retort, and the waste liquid export of retort side passes through the pipeline intercommunication with the waste liquid jar, and the retort top passes through the pipeline intercommunication with the gas-liquid separation jar, and the bottom of gas-liquid separation jar passes through the pipeline intercommunication with the waste liquid jar, and the gas-liquid separation jar top is provided with the hydrogen export.
The beneficial effects of adopting above-mentioned technical scheme are that this practicality: when the device is used, low-concentration sodium borohydride solution (2.0-5.0%) in the raw material tank enters the reaction tank, hydrolysis is carried out under the action of a catalyst in the reaction tank to generate hydrogen, after the reaction is finished, the generated waste liquid flows into the waste liquid tank from a waste liquid outlet on the side surface of the reaction tank, and the generated hydrogen enters the gas-liquid separation tank from the top of the reaction tank. In the gas-liquid separation tank, liquid enters the bottom of the gas-liquid separation tank and flows into the waste liquid tank; the gas is discharged from a hydrogen outlet at the top of the gas-liquid separation tank. Because the low-concentration sodium borohydride solution is used as the raw material liquid, the temperature for preparing hydrogen is just at the proper air inlet temperature of the fuel cell, a heat exchanger is not required to be arranged for heat exchange, and the self-hydrolysis process of the low-concentration sodium borohydride solution is very slow, so that alkali is not required to be added into the solution for inhibition.
On the basis of the technical scheme, the utility model can be improved as follows.
Further, the top of the raw material tank is provided with an air inlet and an air outlet, the air inlet is communicated with the top of the reaction tank through a pipeline, and the air outlet is communicated with the gas-liquid separation tank through a pipeline.
The beneficial effects of adopting the above further technical scheme are that this practicality: the hydrogen generated by the reaction tank is introduced into the top of the raw material tank, and then enters the gas-liquid separation tank from the top of the raw material tank, so that the hydrogen generated by the reaction tank is buffered by the raw material tank and then enters the gas-liquid separation tank, and impurities in the hydrogen are conveniently separated.
Further, the feed inlet is arranged at the top of the raw material tank, and a feed pump is arranged between the raw material tank and the reaction tank.
The beneficial effects of adopting the above further technical scheme are that this practicality: the feed inlet is used for supplementing raw materials to the raw material tank, and the feed pump is used for pumping the raw materials in the raw material tank into the reaction tank for reaction.
Further, a first temperature display and a first pressure display are arranged on the reaction tank, and a safety valve is arranged at the top of the reaction tank.
The beneficial effects of adopting the above further technical scheme are that this practicality: the first temperature display and the first pressure display are used for indicating the temperature and the pressure of the reaction zone. When the pressure in the reactor reaches a high limit, the relief valve automatically opens the relief system pressure.
Further, a first liquid level indicator and a second liquid level indicator are arranged on the side face of the gas-liquid separation tank, a first electromagnetic valve is arranged in a pipeline between the gas-liquid separation tank and the waste liquid tank, and the first liquid level indicator and the second liquid level indicator are in communication connection with the first electromagnetic valve.
The beneficial effects of adopting the above further technical scheme are that this practicality: through first liquid level indicator and second liquid level indicator and first solenoid valve, can be according to the height of the interior liquid of gas-liquid separation jar automatic liquid with gas-liquid separation jar bottom to the waste liquid jar.
Further, a silk screen foam remover is arranged at the upper part of the gas-liquid separation tank.
The beneficial effects of adopting the above further technical scheme are that this practicality: the silk screen foam remover is used for eliminating entrainment.
Further, the hydrogen outlet is connected with a filter tank through a pipeline, and a second temperature display and a second pressure display are arranged on the pipeline between the hydrogen outlet and the filter tank.
The beneficial effects of adopting the above further technical scheme are that this practicality: naBO carried in hydrogen because of low concentration of sodium borohydride solution 2 The content is little, and the filter can be used for conveniently filtering, so that the purification process is greatly simplified.
Further, a pressure stabilizing valve is arranged at the outlet of the filtering tank.
The beneficial effects of adopting the above further technical scheme are that this practicality: the pressure stabilizing valve is used for automatically stabilizing the pressure of the outlet hydrogen.
Further, the side of the waste liquid tank is provided with a third liquid level indicator and a fourth liquid level indicator, the bottom of the waste liquid tank is provided with a liquid outlet, the liquid outlet is provided with a second electromagnetic valve, and the third liquid level indicator and the fourth liquid level indicator are in communication connection with the second electromagnetic valve.
The beneficial effects of adopting the above further technical scheme are that this practicality: through third liquid level indicator and fourth liquid level indicator and second solenoid valve, can be according to the liquid in the waste liquid jar high automatic liquid with gas-liquid separation jar bottom to the waste liquid jar.
Further, the top of the waste liquid tank is communicated with the gas-liquid separation tank through a pipeline.
The beneficial effects of adopting the above further technical scheme are that this practicality: the top of the waste liquid tank is communicated with the gas-liquid separation tank for balancing the pressure in the system.
The beneficial effects of the utility model are as follows:
1. the hydrogen production device has low cost and high quality hydrogen storage density. The utility model discloses with low concentration sodium borohydride solution as the feed liquid, the temperature of preparing hydrogen just is in fuel cell's suitable air inlet temperature, need not to set up the heat exchanger and carries out the heat transfer, reduced weight and the volume of device greatly, especially use in the place that is close to the water source, can show the quality hydrogen storage density that improves the device, in addition, low concentration sodium borohydride solution is very slow from the hydrolysis process, need not to add the alkali in solution and restrain, both practice thrift the cost, can reduce the corrosivity to the device again.
2. The hydrogen post-treatment process of the hydrogen production device is simpler and more convenient. The hydrogen generated by the reaction can be directly subjected to gas-liquid separation without introducing cooling water for heat exchange; because of low concentration of solution, naBO carried by hydrogen 2 The content is little, the filter can be used for conveniently filtering, and the purifying process is greatly simplified.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
the device comprises a raw material tank 1, a raw material tank 2, a charging port 3, a feeding pump 4, a reaction tank 5, a first temperature display 6, a first pressure display 7, a safety valve 8, a waste liquid tank 9, a third liquid level indicator 10, a fourth liquid level indicator 11, a second electromagnetic valve 12, a gas-liquid separation tank 13, a first liquid level indicator 14, a second liquid level indicator 15, a first electromagnetic valve 16, a second temperature display 17, a second pressure display 18, a filtering tank 19 and a pressure stabilizing valve.
Detailed Description
The following describes the embodiments of the present utility model in detail with reference to the drawings.
In an embodiment of the utility model, as shown in fig. 1, a low-concentration sodium borohydride solution hydrolysis hydrogen production device is provided, which comprises a raw material tank 1, a reaction tank 4, a waste liquid tank 8 and a gas-liquid separation tank 12.
The bottom of the raw material tank 1 and the bottom of the reaction tank 4 are communicated through a pipeline, so that raw materials in the raw material tank 1 can be conveyed into the reaction tank 4. The waste liquid outlet on the side surface of the reaction tank 4 is communicated with the waste liquid tank 8 through a pipeline, so that the waste liquid after the reaction in the reaction tank 4 can be discharged into the waste liquid tank 8. The top of the raw material tank 1 is provided with an air inlet and an air outlet, the air inlet is communicated with the top of the reaction tank 4 through a pipeline, and the air outlet is communicated with the gas-liquid separation tank 12 through a pipeline, so that hydrogen generated in the reaction tank 4 enters the gas-liquid separation tank 12 after being buffered by the raw material tank 1. The bottom of the gas-liquid separation tank 12 is communicated with the waste liquid tank 8 through a pipeline, so that waste liquid generated by separation in the gas-liquid separation tank 12 is discharged into the waste liquid tank 8. The top of the gas-liquid separation tank 12 is provided with a hydrogen outlet so that the separated hydrogen is discharged.
The top of the raw material tank 1 is provided with a feed inlet 2 for adding raw materials into the raw material tank 1, and a feed pump 3 for conveying raw materials is arranged between the raw material tank 1 and a reaction tank 4.
The reaction tank 4 is provided with a first temperature display 5 and a first pressure display 6 for monitoring the reaction temperature and pressure. The top of the reaction tank 4 is provided with a safety valve 7.
The side of the gas-liquid separation tank 12 is provided with a first liquid level indicator 13 and a second liquid level indicator 14, a pipeline between the gas-liquid separation tank 12 and the waste liquid tank 8 is provided with a first electromagnetic valve 15, and the first liquid level indicator 13 and the second liquid level indicator 14 are in communication connection with the first electromagnetic valve 15, so that liquid at the bottom of the gas-liquid separation tank 12 can be automatically discharged into the waste liquid tank 8 according to the liquid level. A silk screen foam remover is arranged at the upper part of the gas-liquid separation tank 12.
The hydrogen outlet is connected with a filter tank 18 through a pipeline so as to further filter and purify the hydrogen. A second temperature display 16 and a second pressure display 17 are provided on the conduit between the hydrogen outlet and the filter tank 18, respectively indicating the temperature and pressure of the hydrogen in the conduit. The outlet of the filter tank 18 is provided with a pressure stabilizing valve 19, so that the outlet hydrogen pressure is automatically kept stable.
The side of the waste liquid tank 8 is provided with a third liquid level indicator 9 and a fourth liquid level indicator 10, the bottom of the waste liquid tank 8 is provided with a liquid outlet, the liquid outlet is provided with a second electromagnetic valve 11, and the third liquid level indicator 9 and the fourth liquid level indicator 10 are in communication connection with the second electromagnetic valve 11, so that waste liquid in the waste liquid tank 8 can be automatically discharged according to the liquid level. The top of the waste liquid tank 8 is communicated with the gas-liquid separation tank 12 through a pipeline, so that the pressure in the system can be balanced.
All parts of the catalyst are made of corrosion-resistant materials, the raw material liquid is low-concentration sodium borohydride solution (2.0-5.0%), and the catalyst can be one or more of supported noble metal catalysts or supported non-noble metal catalysts.
Before hydrogen production, the raw material liquid is firstly supplemented into the raw material tank 1 from the outside through the feed inlet 2, and after the feeding is finished, the feed inlet is closed, and the catalyst is filled in the reaction tank 4. When hydrogen is produced, the feed pump 3 conveys the raw material liquid in the raw material tank 1 to the bottom of the reaction tank 4, the raw material liquid reacts to produce hydrogen after contacting with the catalyst, the raw material liquid has enough residence time in the reaction tank 4 from bottom to top, and when the liquid level of the raw material liquid reaches a waste liquid outlet at the side of the reaction tank 4, the fully reacted raw material liquid overflows from the waste liquid outlet and enters the waste liquid tank 8. When the liquid level of the waste liquid in the waste liquid tank 8 reaches the liquid level of the third liquid level indicator 9, the second electromagnetic valve 11 is opened, and the liquid discharge pump discharges the waste liquid in the waste liquid tank 8; when the liquid level of the waste liquid in the waste liquid tank 8 falls to the liquid level of the fourth liquid level indicator 10, the second electromagnetic valve 11 is closed, stopping the liquid discharge. The hydrogen generated by the reaction in the reaction tank 4 enters the raw material tank 1 from the top of the reaction tank 4 through a pipeline, is buffered through the upper space of the raw material tank 1, then enters the gas-liquid separation tank 12 through a pipeline, after vapor and solution mist carried in the hydrogen are separated, liquid enters the bottom of the gas-liquid separation tank 12, when the liquid level of the waste liquid in the gas-liquid separation tank 12 reaches the liquid level of the first liquid level indicator 13, the first electromagnetic valve 15 is opened, and the waste liquid at the bottom of the gas-liquid separation tank 12 is discharged into the waste liquid tank 8; when the liquid level of the waste liquid in the gas-liquid separation tank 12 falls to the liquid level of the second liquid level indicator 14, the first electromagnetic valve 15 is closed, and liquid discharge is stopped. The hydrogen after gas-liquid separation enters the upper part of the gas-liquid separation tank 12, entrainment is eliminated through a silk screen demister, and then the hydrogen enters the filtering tank 18 through a pipeline for further purification treatment. When the pressure in the reaction tank 4 reaches the high limit, the relief valve 7 at the top of the reaction tank 4 automatically opens the relief system pressure.
The following table shows the process parameters for producing hydrogen using the apparatus of the present practical embodiment.
| Sequence of steps Number (number) | Device material | Sodium borohydride solution Concentration of | Catalyst | Flow rate of feed pump | Stabilized hydrogen production Rate of speed | Conversion of sodium borohydride to hydrogen (stability) After the hydrogen is produced in a fixed amount for 150 min |
| 1 | 316L stainless steel material | 3 wt% | Supported non-noble metal catalyst | 60 ml/min | 3.65 L/min | 85% |
| 2 | 316L stainless steel material | 3.5 wt% | Supported noble metal catalyst | 50 ml/min | 3.88 L/min | 93% |
Although specific embodiments of the utility model have been described in detail with reference to the accompanying drawings, it should not be construed as limiting the scope of protection of the present patent. Various modifications and variations which may be made by those skilled in the art without the creative effort are within the scope of the patent described in the claims.
Claims (10)
1. A low-concentration sodium borohydride solution hydrolysis hydrogen production device is characterized in that: including head tank (1), retort (4), waste liquid jar (8) and gas-liquid separation jar (12), head tank (1) with retort (4) are through the pipeline intercommunication, the waste liquid export of retort (4) side with waste liquid jar (8) are through the pipeline intercommunication, retort (4) top with gas-liquid separation jar (12) are through the pipeline intercommunication, the bottom of gas-liquid separation jar (12) with waste liquid jar (8) are through the pipeline intercommunication, gas-liquid separation jar (12) top is provided with the hydrogen export.
2. The low concentration sodium borohydride solution hydrolysis hydrogen production apparatus of claim 1, wherein: the top of the raw material tank (1) is provided with an air inlet and an air outlet, the air inlet is communicated with the top of the reaction tank (4) through a pipeline, and the air outlet is communicated with the gas-liquid separation tank (12) through a pipeline.
3. The low concentration sodium borohydride solution hydrolysis hydrogen production apparatus of claim 1, wherein: the top of the raw material tank (1) is provided with a feed inlet (2), and a feed pump (3) is arranged between the raw material tank (1) and the reaction tank (4).
4. The low concentration sodium borohydride solution hydrolysis hydrogen production apparatus of claim 1, wherein: the reaction tank (4) is provided with a first temperature display (5) and a first pressure display (6), and the top of the reaction tank (4) is provided with a safety valve (7).
5. The low concentration sodium borohydride solution hydrolysis hydrogen production apparatus of claim 1, wherein: the side of the gas-liquid separation tank (12) is provided with a first liquid level indicator (13) and a second liquid level indicator (14), a pipeline between the gas-liquid separation tank (12) and the waste liquid tank (8) is provided with a first electromagnetic valve (15), and the first liquid level indicator (13) and the second liquid level indicator (14) are in communication connection with the first electromagnetic valve (15).
6. The low concentration sodium borohydride solution hydrolysis hydrogen production apparatus of claim 1, wherein: the upper part of the gas-liquid separation tank (12) is provided with a silk screen foam remover.
7. The low concentration sodium borohydride solution hydrolysis hydrogen production apparatus of claim 1, wherein: the hydrogen outlet is connected with a filter tank (18) through a pipeline, and a second temperature display (16) and a second pressure display (17) are arranged on the pipeline between the hydrogen outlet and the filter tank (18).
8. The low concentration sodium borohydride solution hydrolysis hydrogen production apparatus of claim 7, wherein: the outlet of the filter tank (18) is provided with a pressure stabilizing valve (19).
9. The low concentration sodium borohydride solution hydrolysis hydrogen production apparatus of claim 1, wherein: the side of the waste liquid tank (8) is provided with a third liquid level indicator (9) and a fourth liquid level indicator (10), the bottom of the waste liquid tank (8) is provided with a liquid outlet, the liquid outlet is provided with a second electromagnetic valve (11), and the third liquid level indicator (9) and the fourth liquid level indicator (10) are in communication connection with the second electromagnetic valve (11).
10. The low concentration sodium borohydride solution hydrolysis hydrogen production apparatus of claim 1, wherein: the top of the waste liquid tank (8) is communicated with the gas-liquid separation tank (12) through a pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322006148.3U CN220715804U (en) | 2023-07-28 | 2023-07-28 | Hydrogen production device by hydrolysis of low-concentration sodium borohydride solution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322006148.3U CN220715804U (en) | 2023-07-28 | 2023-07-28 | Hydrogen production device by hydrolysis of low-concentration sodium borohydride solution |
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| Publication Number | Publication Date |
|---|---|
| CN220715804U true CN220715804U (en) | 2024-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322006148.3U Active CN220715804U (en) | 2023-07-28 | 2023-07-28 | Hydrogen production device by hydrolysis of low-concentration sodium borohydride solution |
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| Country | Link |
|---|---|
| CN (1) | CN220715804U (en) |
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2023
- 2023-07-28 CN CN202322006148.3U patent/CN220715804U/en active Active
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