CN114643245A - In-situ regeneration method of Solid Polymer Electrolyte (SPE) water electrolytic cell - Google Patents
In-situ regeneration method of Solid Polymer Electrolyte (SPE) water electrolytic cell Download PDFInfo
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- CN114643245A CN114643245A CN202011484924.5A CN202011484924A CN114643245A CN 114643245 A CN114643245 A CN 114643245A CN 202011484924 A CN202011484924 A CN 202011484924A CN 114643245 A CN114643245 A CN 114643245A
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- cleaning
- electrolytic cell
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- spe
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 59
- 238000011069 regeneration method Methods 0.000 title claims abstract description 23
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 12
- 239000005518 polymer electrolyte Substances 0.000 title claims abstract description 10
- 239000007787 solid Substances 0.000 title claims abstract description 10
- 238000004140 cleaning Methods 0.000 claims abstract description 54
- 238000000034 method Methods 0.000 claims abstract description 17
- 238000005406 washing Methods 0.000 claims abstract description 12
- 239000000243 solution Substances 0.000 claims description 24
- 239000007864 aqueous solution Substances 0.000 claims description 13
- 239000008367 deionised water Substances 0.000 claims description 10
- 229910021641 deionized water Inorganic materials 0.000 claims description 10
- 239000008213 purified water Substances 0.000 claims description 10
- 230000008929 regeneration Effects 0.000 claims description 9
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 6
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 6
- 238000005868 electrolysis reaction Methods 0.000 claims description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 4
- 238000002791 soaking Methods 0.000 claims description 4
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 2
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 2
- 229910017604 nitric acid Inorganic materials 0.000 claims description 2
- 230000003068 static effect Effects 0.000 claims description 2
- 230000001737 promoting effect Effects 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000003513 alkali Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000010411 electrocatalyst Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/08—Cleaning containers, e.g. tanks
- B08B9/093—Cleaning containers, e.g. tanks by the force of jets or sprays
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/02—Hydrogen or oxygen
- C25B1/04—Hydrogen or oxygen by electrolysis of water
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B15/00—Operating or servicing cells
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
The invention relates to an in-situ regeneration method of a Solid Polymer Electrolyte (SPE) water electrolytic cell. The method specifically comprises the following steps: and directly introducing washing liquor into the SPE water electrolytic cell with reduced performance without disassembly, and cleaning for a period of time to recover the performance of the electrolytic cell. The invention does not need to disassemble the electrolytic cell, has simple operation, can quickly recover the performance of the electrolytic cell, and has important significance for prolonging the service life of the SPE water electrolytic cell and promoting the marketization process of the SPE water electrolytic cell.
Description
Technical Field
The invention relates to an in-situ regeneration method of a Solid Polymer Electrolyte (SPE) water electrolytic cell, belonging to the technical field of SPE water electrolysis of solid polymer electrolytes.
Background
At present, an alkaline electrolytic cell is still the mainstream of the electrolytic hydrogen production technology, but due to the defects of high pollution, low gas purity, large energy consumption, large volume, alkali leakage phenomenon of the electrolytic cell and the like, the replacement of the electrolytic technology is urgently needed. The Solid Polymer Electrolyte (SPE) water electrolytic cell technology has the advantages of high gas purity, environmental protection, low energy consumption, small volume and the like, so that many hydrogen production companies and scientific research institutions in the world are dedicated to developing the Solid Polymer Electrolyte (SPE) water electrolytic cell technology. However, the service life of the SPE water electrolytic cell always limits one of the important factors for the development of the SPE electrolytic cell. The solid polymer electrolyte or the electrocatalyst is contaminated with time and time due to inevitable contact with impurities in the pipe, dust in the air, and the like during operation. A large part of impurities can be removed by physical means such as cleaning, and the performance of the electrolytic cell is regenerated. In the prior art, the electrolytic cell is disassembled, and each electrode is cleaned independently, but the workload is too large.
Therefore, a rapid, efficient and low-cost regeneration method is found, and the regeneration method has great significance for prolonging the service life of the SPE water electrolytic cell and promoting the marketization process of the SPE electrolytic cell.
Disclosure of Invention
The present invention relates to an in situ method for Solid Polymer Electrolyte (SPE) water electrolysis cells. The method specifically comprises the following steps: and introducing a washing solution into the SPE electrolytic cell with the reduced performance, and cleaning for a period of time to recover the performance of the electrolytic cell. The invention does not need to disassemble the electrolytic cell, has simple operation, can efficiently and quickly recover the performance of the electrolytic cell, and greatly prolongs the service life of the SPE water electrolytic cell.
In order to achieve the purpose, the invention adopts the technical scheme that:
and (3) introducing a cleaning solution with a certain concentration into the SPE water electrolytic cell, cleaning for 0.01-30h, then cleaning for 0.1-30 h by using purified water or deionized water, and repeating the steps for 1-10 times.
The cleaning solution may be H2O2Aqueous solution, hydrochloric acid aqueous solution, sulfuric acid aqueous solution, nitric acid aqueous solution, or one of ammonia water, sodium hydroxide aqueous solution, and potassium hydroxide aqueous solution, or a combination thereof.
The molar concentration of the cleaning solution is 0.1-5 mol/L, the cleaning time is 0.1-30 h, and the cleaning is carried out for 1-5 times.
The purified water or deionized water can be used for cleaning for 0.1-20 h, and the cleaning is repeated for 1-10 times. Or washing with purified water or deionized water for 0.1-0.5 h, repeating for 1-5 times, and washing with purified water or deionized water for 0.1-10 h, repeating for 1-5 times.
Cleaning solution with the molar concentration of 1-5 mol/L for 0.1-10 h, and repeating for 1-3 times; and cleaning with 0.1-1 mol/L cleaning solution for 0.1-20 h, and repeating for 1-7 times. Or washing with 0.1-4 mol/L washing solution for 0.1-24 h, and repeating for 1-6 times.
The cleaning mode can be that the cleaning solution is circulated by a pump and passes through the water electrolytic cell for cleaning, or the cleaning solution is led into the water electrolytic cell for soaking and cleaning, or the cleaning solution is led into the water electrolytic cell by a siphon method for circulating or soaking and cleaning.
The cleaning solution can be used for cleaning the anode or the cathode cavity independently, and can also be used for cleaning the cathode and the anode cavity simultaneously; and then the cathode and anode cavities are simultaneously cleaned by pure water or deionized water.
The method can restore the performance of the electrolytic cell.
The invention has the following advantages:
1. high speed and high efficiency. The invention saves the time for assembling and disassembling the electrolytic cell stack and can greatly improve the regeneration efficiency of the SPE water electrolytic cell.
2. The cost is low. The invention adopts cheap cleaning solution, and the performance of the electrolytic cell can be recovered.
In a word, the invention adopts a regeneration method with low cost, can efficiently and quickly prolong the service life of the SPE water electrolytic cell, reduces the operation cost of the SPE water electrolytic cell, and has important significance for promoting the marketization process of the SPE water electrolytic cell.
Drawings
FIG. 1 is a process flow diagram of a water pump cycle cleaning SPE water electrolytic cell;
FIG. 2V-I curves before and after regeneration;
FIG. 3 life curves before and after regeneration;
in the figure, 1 is a water tank, 2 is a washing liquid tank, 3 is an SPE electrolytic cell, 4 is a pump, and 5 and 6 are stop valves.
Detailed Description
FIG. 1 shows a schematic flow chart of the circular cleaning and regeneration of the electrolytic cell, wherein 1 is a water tank, 2 is a washing liquid tank, 3 is an SPE electrolytic cell, 4 is a pump, and 5 and 6 are stop valves. The experimental process is that the cleaning solution in the step 2 is introduced into the step 3 through the step 4, the step 6 is closed after cleaning, the step 5 is opened again, and the step 1 is switched to be introduced into the step 3 to complete regeneration.
Example 1
Example 1A water pump cycle purge was used, first 4M H2O2The solution is introduced into the anode of the SPE water electrolytic cellCleaning the anode and cathode of the electrolytic cell with purified water for 8h after 7h, repeating the above steps for 5 times, measuring the performance of the regenerated electrolytic cell, and comparing the V-I curves before and after regeneration, as shown in FIG. 2, the V-I curve before and after regeneration is 500mA cm-21.77V and 1.65V after regeneration, the cell performance was improved by 120mV, so that the method was able to restore the cell performance to a large extent.
Example 2
In the embodiment 2, a siphon static cleaning method is adopted, 4.5M hydrochloric acid aqueous solution is introduced into the anode and the cathode of the SPE water electrolytic cell, the SPE water electrolytic cell is soaked for 24 hours, and the process is repeated for 4 times; cleaning with purified water for 8 hr, and repeating for 5 times. The cell life test was then continued with a constant current density of 1000mA cm as shown in FIG. 3-2When the voltage is reduced from 1.95V to 1.75V and the operation is continued to 450h, the performance is basically stable, which shows that the method can recover the performance of the electrolytic cell to a great extent.
The above examples illustrate that the regeneration method of the present invention can prolong the life of the SPE water electrolytic cell, reduce the operation cost of the SPE water electrolytic cell, and has important significance for promoting the marketization process of the SPE electrolytic cell.
Claims (7)
1. A method of in situ regeneration of a Solid Polymer Electrolyte (SPE) water electrolytic cell, characterized by: and (3) introducing a cleaning solution with a certain concentration into the SPE water electrolytic cell, cleaning for 0.01-30h, then cleaning for 0.1-30 h by using purified water or deionized water, and repeating the steps for 1-10 times.
2. The in-situ regeneration method of claim 1, wherein: the cleaning solution may be H2O2Aqueous solution, hydrochloric acid aqueous solution, sulfuric acid aqueous solution, nitric acid aqueous solution, or one of ammonia water, sodium hydroxide aqueous solution, and potassium hydroxide aqueous solution, or a combination thereof.
3. The in-situ regeneration method of claim 1, wherein: the molar concentration of the cleaning solution is 0.1-5 mol/L, the cleaning time is 0.1-30 h, and the cleaning is carried out for 1-5 times.
4. The in-situ regeneration method of claim 1, wherein: the purified water or deionized water can be used for cleaning for 0.1-20 h, and the cleaning is repeated for 1-10 times; or washing with purified water or deionized water for 0.1-0.5 h, repeating for 1-5 times, and washing with purified water or deionized water for 0.1-10 h, repeating for 1-5 times.
5. The in-situ regeneration method according to claims 1 and 3, wherein: cleaning with a cleaning solution with a molar concentration of 1-5 mol/L for 0.1-10 h, repeating for 1-3 times, cleaning with a cleaning solution with a molar concentration of 0.1-1 mol/L for 0.1-20 h, and repeating for 1-7 times; or washing with 0.1-4 mol/L washing solution for 0.1-24 h, and repeating for 1-6 times.
6. The in-situ regeneration method of claim 1, wherein: the cleaning mode can be that the cleaning solution is circulated by a pump and is cleaned by the water electrolysis cell, the cleaning solution can also be introduced into the water electrolysis cell for soaking and cleaning, or the cleaning solution is introduced into the water electrolysis cell by a siphon method for circulation or static soaking and cleaning.
7. The in-situ regeneration method of claim 1, wherein: the cleaning solution can be used for cleaning the anode or the cathode cavity independently, and can also be used for cleaning the cathode and the anode cavity simultaneously; then the cathode and anode cavities are cleaned simultaneously by pure water or deionized water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011484924.5A CN114643245A (en) | 2020-12-15 | 2020-12-15 | In-situ regeneration method of Solid Polymer Electrolyte (SPE) water electrolytic cell |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011484924.5A CN114643245A (en) | 2020-12-15 | 2020-12-15 | In-situ regeneration method of Solid Polymer Electrolyte (SPE) water electrolytic cell |
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| Publication Number | Publication Date |
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| CN114643245A true CN114643245A (en) | 2022-06-21 |
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| CN202011484924.5A Pending CN114643245A (en) | 2020-12-15 | 2020-12-15 | In-situ regeneration method of Solid Polymer Electrolyte (SPE) water electrolytic cell |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE1003943A3 (en) * | 1990-09-28 | 1992-07-22 | Solvay | Method and installation for the production of aqueous alkaline metalhydroxide solutions |
| CN1124983A (en) * | 1993-04-08 | 1996-06-19 | 金属股份公司 | Method of preparing alkali-metal peroxide solutions |
| CN105603453A (en) * | 2014-11-24 | 2016-05-25 | 中国科学院大连化学物理研究所 | In-situ regeneration method of solid polymer electrolyte water electrolyzer |
-
2020
- 2020-12-15 CN CN202011484924.5A patent/CN114643245A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE1003943A3 (en) * | 1990-09-28 | 1992-07-22 | Solvay | Method and installation for the production of aqueous alkaline metalhydroxide solutions |
| CN1124983A (en) * | 1993-04-08 | 1996-06-19 | 金属股份公司 | Method of preparing alkali-metal peroxide solutions |
| CN105603453A (en) * | 2014-11-24 | 2016-05-25 | 中国科学院大连化学物理研究所 | In-situ regeneration method of solid polymer electrolyte water electrolyzer |
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