CN211394647U - Three-chamber reactor device for efficiently synthesizing H2O2 - Google Patents
Three-chamber reactor device for efficiently synthesizing H2O2 Download PDFInfo
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- CN211394647U CN211394647U CN201921341351.3U CN201921341351U CN211394647U CN 211394647 U CN211394647 U CN 211394647U CN 201921341351 U CN201921341351 U CN 201921341351U CN 211394647 U CN211394647 U CN 211394647U
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Abstract
The utility model discloses a be used for high-efficient synthetic H2O2The three-chamber reactor device consists of an anode chamber and two cathode chambers, wherein the anode chamber and the cathode chambers are separated by a cation exchange membrane, the cathode is a manufactured carbon black-graphite-PTFE air diffusion cathode, the anode is a titanium/iridium dioxide composite metal plate which is vertically inserted into an anode tank, and the cathode is respectively fixed by two cathode fixing plates. Anode titanium-The iridium dioxide composite metal plate is connected with the positive pole of a direct current power supply, and the two cathodes are both connected with the negative pole of the direct current power supply. The carbon black-graphite-PTFE air diffusion cathode is selected as the cathode, the titanium/iridium dioxide metal plate is used as the anode, and the current efficiency can reach 100 percent and is higher than that of a common reactor.
Description
Technical Field
The utility model relates to a field is the electrochemical synthesis field, in particular to is used for high-efficient electro-catalysis to closeTo H2O2The apparatus of (1).
Background
Hydrogen peroxide (H)2O2) Is an environmentally friendly strong chemical oxidant, and only water (H) is used in decomposition2O) and oxygen (O)2) The product does not produce harmful residue, and has wide application in pulp bleaching, textile and other manufacturing industries, electronic industry, waste water treatment, chemical oxidation (including large-scale propylene oxidation to produce propylene oxide), and the like.
Industrially, hydrogen peroxide is obtained by the Anthraquinone Oxidation (AO) process. However, this method is not considered to be a green and environmentally friendly production method due to large energy input, complicated steps, and large amount of waste generated. Furthermore, the transportation, storage and handling of hydrogen peroxide present potential hazards and additional costs. O via the two-electron pathway of Oxygen Reduction Reaction (ORR)2Electrochemical reduction to H2O2For in situ production of H2O2Offering great potential. Carbon-based materials (such as activated carbon, fullerene, carbon nanotube, carbon aerogel, graphite, graphene, and the like) exist in various forms, including powder, fiber, aerogel, composite material, flake, monomer, tube, and the like, and are widely used as catalytic materials due to their advantages of large specific surface area, good electrical conductivity, corrosion resistance, large abundance, low price, and the like.
Currently, air breathing cathodes are a very promising form of cathode in electrochemical systems. The air breathing cathode consists of a hydrophobic Gas Diffusion Layer (GDL) exposed to air and a Catalytic Layer (CL) immersed in an electrolyte solution, wherein oxygen in the air can diffuse into the catalytic layer from the diffusion layer, and the oxygen is combined with hydrogen ions and reacts under the catalysis of active sites to generate H2O2。
SUMMERY OF THE UTILITY MODEL
The purpose of the utility model is to design a synthetic H for the problems existing above2O2The three-chamber reactor has simple structure and low manufacturing cost, and effectively improves H2O2The synthesis efficiency is improved.
The utility model aims at realizing through the following technical scheme: for efficiently synthesizing H2O2The three-chamber reactor device consists of an anode chamber and two cathode chambers, wherein the anode chamber and the cathode chambers are separated by a cation exchange membrane.
The cathode is made of carbon black-graphite-PTFE air diffusion cathode, the anode is made of titanium/iridium dioxide composite metal plate and is vertically inserted into the anode groove, and the cathode is fixed by two cathode fixing plates respectively.
The anode titanium/iridium dioxide composite metal plate is connected with the positive pole of a direct current power supply, and the two cathodes are connected with the negative pole of the direct current power supply.
Three chambers were each filled with 200mL of sodium sulfate (Na)2SO4) And (3) an electrolyte.
The main body of the device is made of organic glass material
The cathode adopted by the device is a carbon black-graphite-PTFE air diffusion cathode which is composed of a diffusion layer, a catalyst layer and a steel mesh used as a current collector, wherein the catalyst layer and the diffusion layer are respectively formed by mixing graphite carbon black and carbon black powder with alcohol and PTFE, stirring the mixture into a paste shape, and rolling the paste onto two sides of the steel mesh.
The anode used in the device is a titanium/iridium dioxide plate with the length of 10cm, the width of 4cm and the thickness of 1 mm.
Advantageous effects
1. The carbon black-graphite-PTFE air diffusion cathode is selected as the cathode, the titanium/iridium dioxide metal plate is used as the anode, and the current efficiency can reach 100 percent and is higher than that of a common reactor.
2. The system can control the concentration of the hydrogen peroxide by adjusting the current and the electrifying time, and is simple and convenient to operate.
3. The system has low cost, and the organic glass and the graphite-carbon black-PTFE air diffusion cathode are cheap and easy to obtain.
Drawings
FIG. 1 is a high efficiency synthesis of H2O2The structure of the three-chamber reactor is shown schematically.
Reference numerals: the device comprises a cathode chamber 1, a cathode 2, a cation exchange membrane 3, an anode chamber 4, an anode tank 5, a sampling port 6 and a cathode fixing plate 7.
Detailed Description
The invention is further described with reference to the following figures and specific embodiments.
For efficiently synthesizing H2O2The three-chamber reactor device is mainly made of organic glass and respectively comprises an anode chamber 4 (with the size of 10cm x 2cm) and two cathode chambers 1 (with the size of 10cm x 2cm), wherein the anode chamber 4 and the cathode chambers 1 are separated by a cation exchange membrane 3, the cathode 2 is a manufactured carbon black-graphite-PTFE air diffusion cathode, the anode is a titanium/iridium dioxide composite metal plate (with the size of 4cm x 10cm x 1mm) and is vertically inserted into an anode groove 5 (with the size of 5cm x 1cm), and the cathode 2 is respectively fixed by two cathode fixing plates 7. When in use, the assembled reactor is connected with a direct current power supply, the anode titanium/iridium dioxide composite metal plate is connected with the anode of the direct current power supply, the two cathodes 2 are both connected with the cathode of the direct current power supply, and 200mL of sodium sulfate (Na) is respectively injected into the three chambers2SO4) Electrolyte controls the operation of the reactor by adjusting the current and the power-on time, and samples are taken from the sampling port 6.
The common single-chamber reactor is a cylindrical chamber with the diameter of 3cm and the length of 4cm, the carbon black-graphite-PTFE air diffusion cathode is adopted as the cathode, a Pt sheet (1cm x 1cm) is adopted as the anode, and the distance between the cathode and the anode is 2 cm.
Example 1
200mL of Na with a concentration of 0.05M was injected into the anode chamber and the two cathode chambers, respectively2SO4Connecting the titanium/iridium dioxide composite metal plate with the positive electrode of a direct current power supply, connecting two cathodes with the negative electrode of the direct current power supply, turning on a power switch, adjusting the current to 70mA, operating for 20min, and detecting H by using a potassium titanium oxalate spectrophotometry2O2Concentration, H of two cathode compartments2O2The concentrations were 30mg/L and 25mg/L, and the current efficiency was 75%.
Example 2
Respectively injecting 200mL of solution with the concentration of 200mL into the anode chamber and the two cathode chambers0.05M of Na2SO4Connecting the titanium/iridium dioxide composite metal plate with the positive electrode of a direct current power supply, connecting two cathodes with the negative electrode of the direct current power supply, turning on a power switch, adjusting the current to 140mA, operating for 20min, and detecting H by using a potassium titanium oxalate spectrophotometry2O2Concentration, H of two cathode compartments2O2The concentrations were 71mg/L and 72mg/L, and the current efficiency was 96%.
Example 3
200mL of Na with a concentration of 0.05M was injected into the anode chamber and the two cathode chambers, respectively2SO4Connecting the titanium/iridium dioxide composite metal plate with the positive electrode of a direct current power supply, connecting two cathodes with the negative electrode of the direct current power supply, turning on a power switch, adjusting the current to 210mA, operating for 20min, and detecting H by using a potassium titanium oxalate spectrophotometry2O2Concentration, H of two cathode compartments2O2The concentrations were 120mg/L and 111mg/L, and the current efficiency was 100%.
Example 4
200mL of Na with a concentration of 0.05M was injected into the anode chamber and the two cathode chambers, respectively2SO4Connecting the titanium/iridium dioxide composite metal plate with the positive electrode of a direct current power supply, connecting two cathodes with the negative electrode of the direct current power supply, turning on a power switch, adjusting the current to 280mA, operating for 20min, and detecting H by using a titanium potassium oxalate spectrophotometry2O2Concentration, H of two cathode compartments2O2The concentrations were 131mg/L and 146mg/L, and the current efficiency was 94%.
Example 5
200mL of Na with a concentration of 0.05M was injected into the anode chamber and the two cathode chambers, respectively2SO4Connecting the titanium/iridium dioxide composite metal plate with the positive electrode of a direct current power supply, connecting two cathodes with the negative electrode of the direct current power supply, turning on a power switch, adjusting the current to 350mA, operating for 20min, and detecting H by using a potassium titanium oxalate spectrophotometry2O2Concentration, H of two cathode compartments2O2The concentrations were 167mg/L and 187mg/L, and the current efficiency was 95%.
Example 6
Into a common single-chamber reactor was injected 28mL of Na with a concentration of 0.05M2SO4Electrolyte, connecting a Pt sheet with the positive electrode of a direct current power supply, connecting the cathode with the negative electrode of the direct current power supply, turning on the direct current power supply, adjusting the current to 35mA, operating for 20min, and detecting H by using a potassium titanium oxalate spectrophotometry2O2Concentration of H2O2The concentration was 173mg/L, and the current efficiency was 65%.
Example 7
Into a common single-chamber reactor was injected 28mL of Na with a concentration of 0.05M2SO4Electrolyte, connecting a Pt sheet with the positive electrode of a direct current power supply, connecting the cathode with the negative electrode of the direct current power supply, turning on the direct current power supply, adjusting the current to 70mA, operating for 20min, and detecting H by using a potassium titanium oxalate spectrophotometry2O2Concentration of H2O2The concentration was 353mg/L and the current efficiency was 67%.
Example 8
Into a common single-chamber reactor was injected 28mL of Na with a concentration of 0.05M2SO4Electrolyte, connecting a Pt sheet with the positive electrode of a direct current power supply, connecting the cathode with the negative electrode of the direct current power supply, turning on the direct current power supply, adjusting the current to 105mA, operating for 20min, and detecting H by using a potassium titanium oxalate spectrophotometry2O2Concentration of H2O2The concentration was 611mg/L, and the current efficiency was 77%.
Example 9
Into a common single-chamber reactor was injected 28mL of Na with a concentration of 0.05M2SO4Electrolyte, connecting a Pt sheet with the positive electrode of a direct current power supply, connecting the cathode with the negative electrode of the direct current power supply, turning on the direct current power supply, adjusting the current to 140mA, operating for 20min, and detecting H by using a potassium titanium oxalate spectrophotometry2O2Concentration of H2O2The concentration was 888mg/L, the current efficiency was 84%.
Example 10
Into a common single-chamber reactor was injected 28mL of Na with a concentration of 0.05M2SO4Electrolyte, connecting the Pt sheet with the positive electrode of a direct current power supply, connecting the cathode with the negative electrode of the direct current power supply, turning on the direct current power supply, adjusting the current to 175mA, and operating for 20minAnd detecting H by potassium titanium oxalate spectrophotometry2O2Concentration of H2O2The concentration was 1000mg/L and the current efficiency was 75%.
It should be understood that the embodiments and examples discussed herein are illustrative only and that modifications or changes in light thereof will be suggested to persons skilled in the art and are to be included within the purview of the appended claims.
Claims (4)
1. For efficiently synthesizing H2O2The three-chamber reactor device is characterized by consisting of an anode chamber and two cathode chambers, wherein the anode chamber and the cathode chambers are separated by a cation exchange membrane;
the cathode is made of carbon black-graphite-PTFE air diffusion cathode, the anode is made of titanium/iridium dioxide composite metal plate and is vertically inserted into the anode tank, and the cathode is respectively fixed by two cathode fixing plates.
2. The process of claim 1 for the efficient synthesis of H2O2The three-chamber reactor device is characterized in that the anode titanium/iridium dioxide composite metal plate is connected with the positive pole of a direct current power supply, and the two cathodes are both connected with the negative pole of the direct current power supply.
3. The process of claim 1 for the efficient synthesis of H2O2The three-chamber reactor device of (1), wherein 200mL of the sodium sulfate electrolyte was injected into each of the three chambers.
4. The process of claim 1 for the efficient synthesis of H2O2The three-chamber reactor device is characterized in that the device main body is made of organic glass materials.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110760876A (en) * | 2019-08-19 | 2020-02-07 | 天津大学 | For efficiently synthesizing H2O2Three-chamber reactor device |
| CN113089002A (en) * | 2021-03-18 | 2021-07-09 | 重庆大学 | Selective oxidation device and method for coupling organic matters through electrocatalysis hydrogen peroxide production |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110760876A (en) * | 2019-08-19 | 2020-02-07 | 天津大学 | For efficiently synthesizing H2O2Three-chamber reactor device |
| CN113089002A (en) * | 2021-03-18 | 2021-07-09 | 重庆大学 | Selective oxidation device and method for coupling organic matters through electrocatalysis hydrogen peroxide production |
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