CN115491698A - Freely assembled H based on cathode unit group 2 O 2 Synthesis reactor - Google Patents
Freely assembled H based on cathode unit group 2 O 2 Synthesis reactor Download PDFInfo
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- CN115491698A CN115491698A CN202211262867.5A CN202211262867A CN115491698A CN 115491698 A CN115491698 A CN 115491698A CN 202211262867 A CN202211262867 A CN 202211262867A CN 115491698 A CN115491698 A CN 115491698A
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- 230000015572 biosynthetic process Effects 0.000 title claims abstract description 30
- 238000003786 synthesis reaction Methods 0.000 title claims abstract description 30
- 230000029058 respiratory gaseous exchange Effects 0.000 claims abstract description 53
- 238000006243 chemical reaction Methods 0.000 claims abstract description 26
- 239000003792 electrolyte Substances 0.000 claims abstract description 17
- 238000010992 reflux Methods 0.000 claims abstract description 13
- 239000003014 ion exchange membrane Substances 0.000 claims abstract description 6
- DCKVOWTXVYRDSU-UHFFFAOYSA-N O=[Ti].O=[Ir] Chemical compound O=[Ti].O=[Ir] DCKVOWTXVYRDSU-UHFFFAOYSA-N 0.000 claims abstract 4
- 238000009825 accumulation Methods 0.000 claims abstract 2
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 24
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 5
- 239000003054 catalyst Substances 0.000 claims description 5
- 239000011521 glass Substances 0.000 claims description 5
- 239000000741 silica gel Substances 0.000 claims description 5
- 229910002027 silica gel Inorganic materials 0.000 claims description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 238000011065 in-situ storage Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims description 2
- 230000037431 insertion Effects 0.000 claims description 2
- 239000002905 metal composite material Substances 0.000 claims description 2
- 229910001092 metal group alloy Inorganic materials 0.000 claims description 2
- 239000003345 natural gas Substances 0.000 claims description 2
- 229910000510 noble metal Inorganic materials 0.000 claims description 2
- 230000002572 peristaltic effect Effects 0.000 claims description 2
- 239000004033 plastic Substances 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims description 2
- 229910044991 metal oxide Inorganic materials 0.000 claims 1
- 150000004706 metal oxides Chemical class 0.000 claims 1
- 230000003068 static effect Effects 0.000 claims 1
- 230000001186 cumulative effect Effects 0.000 abstract description 11
- 238000000034 method Methods 0.000 description 8
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 6
- 239000004810 polytetrafluoroethylene Substances 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 239000010936 titanium Substances 0.000 description 5
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 230000003197 catalytic effect Effects 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- PYKYMHQGRFAEBM-UHFFFAOYSA-N anthraquinone Natural products CCC(=O)c1c(O)c2C(=O)C3C(C=CC=C3O)C(=O)c2cc1CC(=O)OC PYKYMHQGRFAEBM-UHFFFAOYSA-N 0.000 description 3
- 150000004056 anthraquinones Chemical class 0.000 description 3
- 239000003575 carbonaceous material Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- HTXDPTMKBJXEOW-UHFFFAOYSA-N dioxoiridium Chemical compound O=[Ir]=O HTXDPTMKBJXEOW-UHFFFAOYSA-N 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000006722 reduction reaction Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000003075 superhydrophobic effect Effects 0.000 description 2
- -1 Polytetrafluoroethylene Polymers 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- UHWHMHPXHWHWPX-UHFFFAOYSA-J dipotassium;oxalate;oxotitanium(2+) Chemical compound [K+].[K+].[Ti+2]=O.[O-]C(=O)C([O-])=O.[O-]C(=O)C([O-])=O UHWHMHPXHWHWPX-UHFFFAOYSA-J 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000037361 pathway Effects 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004076 pulp bleaching Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000013341 scale-up Methods 0.000 description 1
- 238000002798 spectrophotometry method Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
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- 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
- C25B1/28—Per-compounds
- C25B1/30—Peroxides
-
- 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
- C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
- C25B11/02—Electrodes; Manufacture thereof not otherwise provided for characterised by shape or form
-
- 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
- C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
- C25B9/17—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof
- C25B9/19—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof with diaphragms
- C25B9/23—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof with diaphragms comprising ion-exchange membranes in or on which electrode material is embedded
-
- 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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- 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)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
The invention discloses a freely assembled H based on a cathode unit group 2 O 2 The synthesis reactor consists of an air breathing cathode unit group, a cathode chamber reaction tank, an ion exchange membrane and an anode chamber. The anode adopts a titanium-iridium dioxide plate, the cathode adopts an air breathing cathode unit group, the titanium-iridium dioxide plate and the cathode are inserted into a cathode chamber reaction tank and are arranged in a positive and negative alternative mode to form an S-shaped gallery, and the H can be realized by circulating and refluxing electrolyte or series operation of a plurality of reactors 2 O 2 Efficient synthesis and high concentration accumulation. The air breathing cathode unit groups are respectively connected to the negative pole of the direct current power supply, and the anode plates are respectively connected to the positive pole of the direct current power supply. Simultaneously, this air breathing negative pole unit group has random plug, uses in a flexible way, changes convenient advantage. The freely assembled H 2 O 2 The synthesis reactor is operated at a current density of 20mA/cm 2 And after running for 10 hours under the condition of 100 percent of reflux circulation, the highest H 2 O 2 The cumulative concentration reaches 27267mg/L, and the yield is 1.5L.
Description
Technical Field
The invention relates to the field of electrochemical synthesis, in particular to a method for efficiently synthesizing H by electrocatalysis 2 O 2 The free assembly type reactor apparatus of (1).
Background
Hydrogen peroxide (H) 2 O 2 ) Is an environmentally friendly strong chemical oxidant, and only water (H) is used in decomposition 2 O) and oxygen (O) 2 ) No harmful residue is generated, and the method has the advantages of no generation of harmful residues,the method has extremely wide application in pulp bleaching, textile and other manufacturing industries, electronic industry, wastewater treatment, chemical oxidation and the like.
Industrially, hydrogen peroxide is obtained by the Anthraquinone Oxidation (AO) process, with annual yields accounting for H 2 O 2 95% of the total yield. The anthraquinone industry requires a large infrastructure and large energy investment, and concentrated production requires additional transportation, storage and handling of high concentrations of H 2 O 2 The anthraquinone process is considered a less green and environmentally unfriendly process, with potential safety risks and excessive costs.
O via the two-electron pathway of Oxygen Reduction Reaction (ORR) 2 Electrochemical reduction to H 2 O 2 For in situ production of H 2 O 2 Offering great potential. The carbon-based material has high conductivity, high porosity, low cost, good stability and good stability, and is suitable for H 2 O 2 Low decomposability, etc., to be H 2 O 2 Good catalyst selection for production. Currently, in an electrochemical system, an air breathing cathode based on a carbon-based material is an ideal electrode structure. The air breathing cathode can spontaneously utilize oxygen in the air, and the oxygen and H from the electrolyte are reacted at the active site of the catalyst + Co-reacting with electrons of the catalytic layer to form H 2 O 2 。
But in the electrochemical synthesis of H 2 O 2 In the process, H 2 O 2 The production capacity of (a) is not only dependent on the performance of the catalyst and electrode structure but is also influenced by the reactor structure. Laboratory H at present 2 O 2 The electrochemical synthesis is usually carried out in a reactor of tens to hundreds of milliliters, the effective area of the electrode is small, and the H is greatly limited 2 O 2 Efficient synthesis of, synthetic H 2 O 2 The concentration is lower.
Disclosure of Invention
The invention aims to solve the problems and design a free assembly type H 2 O 2 A synthesis reactor for passing a gas phase and a liquid phase through a plurality of sequentially arranged air breathing cathodes by means of modular unitsUnit set thereby increasing H 2 O 2 The synthesis efficiency is improved. In the process, the electrode area can be effectively increased by closely arranging the air breathing cathode unit groups, and meanwhile, the air breathing cathode unit groups have the advantages of random plugging, flexible use and convenient replacement. Freely assembled H based on air breathing cathode unit group construction 2 O 2 The synthesis reactor can carry out independent circulation or continuous flow operation of multiple reactors in series connection to realize high-concentration H 2 O 2 Synthesized and has the potential of scale-up.
The technical scheme adopted by the invention is as follows:
the reactor main body is composed of an air breathing cathode unit group, a cathode chamber reaction tank, an ion exchange membrane and an anode chamber. The reactor anode adopts a titanium/iridium dioxide plate (Ti/IrO) 2 ) Other noble metals (e.g., ni, co, etc.), metal alloys, and metal composite oxides may also be used. The cathode adopts a plurality of air breathing cathode unit groups which are arranged in sequence.
The air breathing cathode unit group consists of a super-hydrophobic carbon black-graphite-PTFE air breathing cathode and an organic glass supporting structure without electric conductivity. The super-hydrophobic carbon black-graphite-PTFE air breathing cathode consists of a catalytic layer and a stainless steel mesh used as a current collector, wherein the catalytic layer is formed by mixing and stirring graphite powder and carbon black powder Polytetrafluoroethylene (PTFE) in proportion into a paste. And then rolling the catalytic layer to one side of a stainless steel mesh current collector, and calcining at 340 ℃ in a muffle furnace to form the carbon black-graphite-PTFE air breathing cathode.
Multiple air breathing cathode unit groups with the same width as the cathode chamber reaction tank are arranged in the cathode chamber reaction tank in a positive and negative alternate way to form an S-shaped electrolyte flow passage, and H is realized through reflux circulation 2 O 2 A high concentration accumulates. Meanwhile, the air breathing cathode unit group can be directly placed into or moved out of the cathode chamber reaction tank without disassembling the reactor, and the operation is convenient and rapid.
Advantageous effects
1. The freely assembled H 2 O 2 Air breathing cathode unit group and cathode chamber adopted by synthesis reactorThe reaction tanks are independent and can be arranged in a multi-unit group mode, and the reaction tanks can be directly placed into or moved out of the cathode chamber reaction tank without disassembling the reactor.
2. The cathode area of the reactor can be adjusted by changing the arrangement number of the air breathing cathode unit groups.
3. The air breathing cathode unit group has the same width with the cathode chamber reaction tank, an electrolyte passage is left on one side, an S-shaped gallery passage is formed in the cathode chamber reaction tank after positive and negative alternate arrangement, and high concentration H in a short time is realized by circulating reflux operation 2 O 2 Cumulatively, the maximum cumulative concentration was about 2.7g/L.
Drawings
Figure 1 schematic of an air breathing cathode unit set.
1 air breathing cathode 2 organic glass supporting structure 3U type silica gel pad 4 screw fixing port 5 air chamber
FIG. 2 is a freely assembled type H 2 O 2 Synthesis of H by running the synthesis reactor under different current density conditions 2 O 2 The cumulative yield of (c).
FIG. 3 is a freely assembled type H 2 O 2 The current density of the synthesis reactor is 20mA/cm 2 In this case, 2M NaOH electrolyte (A) was used in the cathode chamber and 1M Na was used in the cathode chamber 2 SO 4 Electrolyte (B) is arranged to synthesize H by arranging different air breathing cathode unit groups 2 O 2 The cumulative yield of (c).
Detailed Description
The present invention is further described below with reference to examples, but the embodiments of the present invention are not limited thereto.
For efficient in-situ synthesis of H 2 O 2 The main body of the free assembly type reactor device is made of organic glass materials and consists of an air breathing cathode unit group, a cathode chamber reaction tank, an ion exchange membrane and an anode chamber. The operation condition of the reactor is controlled by adjusting the current, the electrifying time and the reflux ratio, and H is measured by a potassium titanium oxalate spectrophotometry method 2 O 2 And (4) content.
Example 1
The invention providesThe configuration design of the air breathing cathode unit group is shown in figure 1. Each air breathing cathode unit group is formed by combining two carbon black-graphite-PTFE air breathing cathodes 1, one sides of stainless steel nets of the two cathodes are opposite, a U-shaped silica gel pad 3 is arranged in the middle for separation, a reverse-shaped silica gel pad and an organic glass supporting structure 2 are respectively arranged on one sides of catalyst layers of the two cathodes, and the units with natural gas chambers 5 in the middle are formed after being fixed by plastic screws at screw fixing ports 4. The area of each cathode is 40cm 2 The cathode area of a single air breathing cathode unit group is 80cm 2 。
Example 2
The invention provides a freely assembled H based on an air breathing cathode unit group 2 O 2 And (3) designing the configuration of the synthesis reactor. The reactor consists of a cathode chamber reaction tank, an anode chamber, an ion exchange membrane and an air breathing cathode unit group. Wherein the air breathing cathode unit group is embedded into the cathode chamber reaction tank, and the positive and negative are alternately arranged to form an S-shaped gallery. An anode plate insertion groove is arranged above the anode chamber and can be used for placing a plurality of anode plates. An ion exchange membrane is arranged between the anode chamber and the cathode chamber reaction tank. Adding NaOH electrolyte into the anode chamber, and adding NaOH or Na into the cathode chamber 2 SO 4 And (3) an electrolyte. And connecting the anode plates with the positive pole of a direct current power supply, and respectively connecting the cathodes in the air breathing cathode unit groups with the negative pole of a direct current power supply. Electrolyte is pumped into the cathode chamber reaction tank from the water outlet by the reflux peristaltic pump, and different reflux ratios are set to realize H 2 O 2 Is accumulated.
Example 3
Will freely assemble type H 2 O 2 The synthesis reactor operates under different current densities, 4 groups of air breathing cathode unit groups (the electrode area is 320 cm) are inserted in the cathode chamber reaction tank in a positive and negative arrangement manner 2 ) The anode chamber is inserted with 4 blocks of Ti/IrO 2 And 1L and 1.5L 2mol/L NaOH electrolytes are respectively added into the anode chamber and the cathode chamber, and the reflux ratio of the cathode chamber is set to be 100%. As shown in FIG. 2, the current densities were 10 and 20mA/cm, respectively 2 H after 8H of reactor operation 2 O 2 The cumulative yield reaches 3590mg/L and 10377mg respectively/L。
Example 4
Will freely assemble type H 2 O 2 The synthesis reactor is operated at an optimum current density of 20mA/cm 2 In the lower operation, different numbers of air breathing cathode unit groups are arranged in the cathode chamber reaction tank to change the electrode area. 4 Ti/IrO blocks are inserted into the anode chamber 2 The anode plate and the cathode chamber are respectively provided with 4, 5 and 6 groups of air breathing cathode unit groups (the electrode areas are respectively 320, 400 and 480 cm) 2 ) 1L and 1.5L 2mol/L NaOH electrolytes are respectively added into the anode chamber and the cathode chamber, and the reflux ratio of the cathode chamber is set to be 100 percent. As shown in FIG. 3 (A), when the number of the cell groups was 4, the reactor was operated for 10 hours with a maximum H 2 O 2 The cumulative yield is 11862mg/L; when the number of the unit groups is 5, the reactor operates for 13H with the maximum H 2 O 2 The cumulative yield was 17383 mg/L; when the number of the unit groups is 6, the reactor operates for 13H with the maximum H 2 O 2 The cumulative yield was 24197mg/L.
Example 5
Will freely assemble type H 2 O 2 The synthesis reactor is operated at an optimum current density of 20mA/cm 2 In the lower operation, different numbers of air breathing cathode unit groups are arranged in the cathode chamber reaction tank to change the electrode area. 4 Ti/IrO blocks are inserted into the anode chamber 2 The anode plate and the cathode chamber are respectively provided with 4, 5 and 6 groups of air breathing cathode unit groups (the electrode areas are respectively 320, 400 and 480 cm) 2 ) Adding 1L 2mol/L NaOH electrolyte into the anode chamber, and adding 1.5L 1mol/L Na into the cathode chamber 2 SO 4 The electrolyte was supplied to the cathode chamber at a reflux ratio of 100%. As shown in FIG. 3 (B), when the number of cell groups was 4, the reactor was operated for 9 hours with a maximum H 2 O 2 The cumulative yield is 12001mg/L; when the number of the unit groups is 5, the reactor is operated for 11H, and the maximum H is 2 O 2 The cumulative yield is 23298mg/L; when the number of the unit groups is 6, the reactor operates for 10H with the maximum H 2 O 2 The cumulative yield was 27267mg/L.
Example 6
This freely assembled type H 2 O 2 The synthesis reactor can be further enlarged, and can be increasedThe volume of the reactor is increased, the number of the air breathing cathode unit groups is increased, or the volume of the air breathing cathode unit groups and the area of the built-in cathode are increased, and the volume and the area are synchronously expanded and enlarged with the reactor. Simultaneously a plurality of reactors can be used in series, thereby realizing a large amount of H 2 O 2 High concentrations of (c) accumulate.
The above embodiments are preferred embodiments of the present invention, however, the present invention is not limited to the above embodiments, and other changes, substitutions, combinations, modifications and simplifications which do not depart from the spirit and principle of the present invention are deemed to be equivalent substitutions and are included in the scope of the present invention.
Claims (7)
1. Freely assembled H based on cathode unit group 2 O 2 The synthesis reactor is characterized by consisting of an air breathing cathode unit group, a cathode chamber reaction tank, an ion exchange membrane and an anode chamber. The anode adopts a titanium-iridium dioxide plate and is inserted into an anode plate insertion groove of the anode chamber; the cathode adopts an air breathing cathode unit group, and the air breathing cathode unit group is embedded into the cathode chamber reaction tank and forms an S-shaped gallery after positive and negative alternate arrangement. Adding NaOH electrolyte into the anode chamber, and adding NaOH or Na into the cathode chamber 2 SO 4 And (3) an electrolyte. And connecting the anode plates with the positive electrode of a direct current power supply, and respectively connecting the cathodes in the air breathing cathode unit groups with the negative electrode of the direct current power supply. Electrolyte is pumped into the cathode chamber reaction tank from the water outlet by the reflux peristaltic pump, and different reflux ratios are set to realize H 2 O 2 Efficient synthesis and high concentration accumulation.
2. The free-assembling H of claim 1 2 O 2 The cathode of the synthesis reactor adopts an air breathing cathode unit component. Each air breathing cathode unit group is formed by combining two cathodes, one sides of stainless steel nets of the two cathodes are opposite, a U-shaped silica gel pad is arranged in the middle of the two cathodes for separation, a reverse silica gel pad and an organic glass supporting structure are respectively arranged on one sides of catalyst layers of the two cathodes, and the unit group with a natural gas chamber in the middle is formed after being fixed at a screw fixing port through a plastic screw.
3. The free-assembling H of claim 1 2 O 2 The synthesis reactor adopts a titanium-iridium dioxide plate as an anode, or can be used as noble metal, metal alloy and metal composite metal oxide of the anode.
4. The free-assembling H of claim 1 2 O 2 The synthesis reactor comprises an air breathing cathode unit group and a cathode chamber reaction tank, wherein the width of the air breathing cathode unit group is the same as that of the cathode chamber reaction tank, an electrolyte passage is reserved on one side of the air breathing cathode unit group, an S-shaped gallery passage is formed in the cathode chamber reaction tank after positive and negative alternate arrangement, and then high-concentration H is realized through in-situ static operation or circulating reflux operation 2 O 2 And (4) accumulating.
5. Free-assembling H according to claim 1 or 2 2 O 2 The synthesis reactor has independent cathode chamber reaction tank and air breathing cathode unit, and may be set inside or shifted out directly without detaching the reactor.
6. Free-assembling H according to claim 1 or 2 2 O 2 The synthesis reactor can be further enlarged, and the enlargement can be synchronously expanded with the reactor by increasing the volume of the reactor, increasing the number of air breathing cathode unit groups or increasing the volume of the air breathing cathode unit groups and the area of a built-in cathode. Simultaneously a plurality of reactors can be used in series, thereby realizing a large amount of H 2 O 2 Is accumulated.
7. The free-assembling form H of claim 1 2 O 2 And the synthesis reactor is characterized in that a plurality of air breathing cathode unit groups are respectively connected to the negative pole of a direct current power supply, and a plurality of anode plates are respectively connected to the positive pole of the direct current power supply.
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| CN101392386A (en) * | 2008-10-23 | 2009-03-25 | 上海交通大学 | Electrochemistry method for simultaneously producing sodium chlorate and alkaline peroxide |
| CN101599550A (en) * | 2009-07-02 | 2009-12-09 | 哈尔滨工业大学 | Plane type self-respiration micro direct methanol fuel battery group structure and preparation method |
| CN107313068A (en) * | 2016-04-26 | 2017-11-03 | 中国科学院大连化学物理研究所 | A kind of electrochemical method of synthetic acidic hydrogen peroxide |
| CN110965077A (en) * | 2019-12-04 | 2020-04-07 | 武汉科技大学 | Preparation method of single-layer self-breathing cathode sheet capable of efficiently producing hydrogen peroxide |
| CN212451662U (en) * | 2020-09-16 | 2021-02-02 | 天津大学 | Continuous flow gallery type H2O2 synthesis reactor based on plug-in capsule cathode |
| CN113186556A (en) * | 2021-04-23 | 2021-07-30 | 天津大学 | Modularized air self-diffusion cathode-titanium iridium anode electrode group and cathode preparation method |
| CN113621980A (en) * | 2021-09-10 | 2021-11-09 | 浙江清越科技有限公司 | Flow type electrochemical device for preparing hydrogen peroxide |
| CN113774416A (en) * | 2021-11-15 | 2021-12-10 | 广东工业大学 | Gas diffusion cathode and electrochemical reactor for in-situ production of hydrogen peroxide |
| CN114108018A (en) * | 2021-12-29 | 2022-03-01 | 天津大学 | Double-chamber H based on waterlogging prevention air breathing cathode assembly2O2Synthesis reactor |
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