CN211394647U - Three-chamber reactor device for efficiently synthesizing H2O2 - Google Patents
Three-chamber reactor device for efficiently synthesizing H2O2Download PDFInfo
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Abstract
Description
Translated fromChinese技术领域technical field
本实用新型所涉及的领域是电化学合成领域，特别涉及一种用于高效电催化合成H2O2的装置。The field to which the utility model relates is the field of electrochemical synthesis, in particular to a device for efficient electrocatalytic synthesis of H2 O2 .
背景技术Background technique
过氧化氢(H2O2)是一种对环境无害的强化学氧化剂，分解时只有水(H2O) 和氧气(O2)生成，不会产生有害残留物，在纸浆漂白、纺织等许多制造业以及电子工业、废水处理、化学氧化(包括大规模丙烯氧化生产丙烯氧化物)等都具有极其广泛的应用。Hydrogen peroxide (H2 O2 ) is a strong chemical oxidant that is harmless to the environment. When decomposed, only water (H2 O) and oxygen (O2 ) are generated, and no harmful residues are produced. It has extremely wide applications in many manufacturing industries, as well as in the electronics industry, wastewater treatment, chemical oxidation (including large-scale propylene oxidation to produce propylene oxide).
工业上，过氧化氢是通过蒽醌氧化(AO)工艺得到的。不过，这种方法由于能量输入大、步骤繁杂、产生的废弃物多，不被认为是一种绿色、环保的生产方法。此外，过氧化氢的运输、储存和处理都存在潜在的危险和额外的成本。通过氧还原反应(ORR)的两电子途径将O2电化学还原为H2O2，为原位生产H2O2提供了很大的潜力。碳基材料(如活性炭、富勒烯、碳纳米管、碳纳米管、碳气凝胶、石墨、石墨烯、石墨烯等)的存在形式多种多样，包括粉末、纤维、气凝胶、复合材料、薄片状、单体、管等形式，由于其具有比表面积大、导电性好、耐腐蚀性、丰度大、价格低廉等优点，被广泛用作催化材料。Industrially, hydrogen peroxide is obtained by anthraquinone oxidation (AO) process. However, this method is not considered to be a green and environmentally friendly production method due to its large energy input, complicated steps, and large amount of waste. In addition, there are potential hazards and additional costs associated with the transportation, storage and handling of hydrogen peroxide. The electrochemical reduction of O to H2 O2 via the two-electron pathway of the oxygen reduction reaction (ORR) offers a great potential for in situ production of H2 O2 . Carbon-based materials (such as activated carbon, fullerenes, carbon nanotubes, carbon nanotubes, carbon aerogels, graphite, graphene, graphene, etc.) exist in a variety of forms, including powders, fibers, aerogels, composites Materials, flakes, monomers, tubes, etc., are widely used as catalytic materials due to their advantages of large specific surface area, good electrical conductivity, corrosion resistance, large abundance, and low price.
目前在电化学体系中，空气呼吸阴极是一种很有潜力的阴极形式。空气呼吸阴极由暴露于空气的疏水气体扩散层(GDL)和浸没于电解质溶液的催化层(CL) 组成，空气中的氧气会从扩散层扩散进入催化层，结合氢离子，在活性位点的催化下反应生成H2O2。Air-breathing cathodes are currently a promising form of cathodes 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. Oxygen in the air diffuses from the diffusion layer into the catalytic layer, binds hydrogen ions, and binds hydrogen ions at the active site. The reaction is catalyzed to generate H2 O2 .
实用新型内容Utility model content
本实用新型的目的是针对以上存在的问题，设计出一种用于合成H2O2的三室反应器，该装置构造简单，制作成本低廉，有效地提高H2O2合成效率。The purpose of the present utility model is to solve the above problems and design athree- chamber reactor for synthesizing H2 O2 .
本实用新型的目的是通过以下技术方案实现的：一种用于高效合成H2O2的三室反应器装置，由阳极室和两个阴极室构成，阳极室和阴极室之间由阳离子交换膜隔开。The purpose of the utility model is achieved through the following technical solutions: a three-chamber reactor device for efficiently synthesizing H2 O2 , which consists of an anode compartment and two cathode compartments, and a cation exchange membrane is formed between the anode compartment and the cathode compartment. separated.
所述阴极选用制作的炭黑-石墨-PTFE空气扩散阴极，阳极选用钛/二氧化铱复合金属板垂直插入阳极槽，阴极分别由两个阴极固定板固定。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.
所述阳极钛/二氧化铱复合金属板连接直流电源正极，两个阴极均连接直流电源负极。The anode titanium/iridium dioxide composite metal plate is connected to the positive electrode of the DC power supply, and the two cathodes are both connected to the negative electrode of the DC power supply.
分别向三个腔室注入200mL硫酸钠(Na2SO4)电解液。200 mL of sodium sulfate (Na2 SO4 ) electrolyte was injected into each of the three chambers.
装置主体是由有机玻璃材质制成The main body of the device is made of plexiglass
该装置所采用的阴极是炭黑-石墨-PTFE空气扩散阴极是由扩散层，催化层和用作集电器的钢网组成，催化层和扩散层分别是由石墨炭黑和炭黑粉末与酒精、 PTFE混合，搅拌至膏状，辊压至钢网地两侧形成的。The cathode used in this device is carbon black-graphite-PTFE air diffusion. The cathode is composed of a diffusion layer, a catalytic layer and a steel mesh used as a current collector. The catalytic layer and the diffusion layer are respectively composed of graphite carbon black and carbon black powder and alcohol. , PTFE mixed, stirred until paste, and rolled to form on both sides of steel mesh.
该装置所采用的阳极是钛/二氧化铱板，长10cm，宽4cm，厚度为1mm。The anode used in this device is a titanium/iridium dioxide plate with a length of 10 cm, a width of 4 cm and a thickness of 1 mm.
有益效果beneficial effect
1.该装置选用的炭黑-石墨-PTFE空气扩散阴极为阴极，阳极为钛/二氧化铱金属板，电流效率可达100％，高于普通的反应器的电流效率。1. The carbon black-graphite-PTFE air diffusion cathode selected for this device is the cathode, and the anode is a titanium/iridium dioxide metal plate. The current efficiency can reach 100%, which is higher than the current efficiency of ordinary reactors.
2.系统对于过氧化氢浓度的获得可通过调节电流的大小和通电的时间控制，操作简便。2. The system can control the concentration of hydrogen peroxide by adjusting the size of the current and the time of energization, and the operation is simple.
3.系统造价低廉，有机玻璃、石墨-炭黑-PTFE空气扩散阴极廉价易得。3. The cost of the system is low, and the plexiglass, graphite-carbon black-PTFE air diffusion cathode is cheap and easy to obtain.
附图说明Description of drawings
图1是高效合成H2O2的三室反应器装置结构示意图。Figure 1 is a schematic structural diagram of a three-chamber reactor device for the efficient synthesis of H2 O2 .
附图标记：1-阴极室，2-阴极，3-阳离子交换膜，4-阳极室，5-阳极槽， 6-取样口，7-阴极固定板。Reference numerals: 1-cathode compartment, 2-cathode, 3-cation exchange membrane, 4-anode compartment, 5-anode tank, 6-sampling port, 7-cathode fixing plate.
具体实施方式Detailed ways
以下结合附图和具体实施例来对本实用新型做进一步的说明。The present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.
一种用于高效合成H2O2的三室反应器装置，该装置主体是由有机玻璃材质制成，分别由阳极室4(尺寸大小为10cm*10cm*2cm)和两个阴极室1(尺寸大小为10cm*10cm*2cm)构成，阳极室4和阴极室1之间由阳离子交换膜3隔开，阴极2选用制作的炭黑-石墨-PTFE空气扩散阴极，阳极选用钛/二氧化铱复合金属板(尺寸大小为4cm*10cm*1mm)垂直插入阳极槽5(尺寸大小为5cm*1cm)，阴极2分别由两个阴极固定板7固定。使用时组装好的该反应器连接一台直流电源，阳极钛/二氧化铱复合金属板连接直流电源正极，两个阴极2均连接直流电源负极，分别向三个腔室注入200mL硫酸钠(Na2SO4)电解液，通过调节电流大小和通电时间控制反应器的运行情况，从取样口6进行取样。A three-chamber reactor device for efficient synthesis of H2 O2 , the main body of the device is made of plexiglass, and consists of an anode chamber 4 (size 10cm*10cm*2cm) and two cathode chambers 1 (size The size is 10cm*10cm*2cm) to form, the anode chamber 4 and the cathode chamber 1 are separated by the cation exchange membrane 3, the cathode 2 selects the carbon black-graphite-PTFE air-diffusion cathode of making, and the anode selects the titanium/iridium dioxide composite for use The metal plate (size is 4cm*10cm*1mm) is vertically inserted into the anode tank 5 (size is 5cm*1cm), and the cathode 2 is fixed by two
普通的单室反应器为直径3cm，长4cm的圆柱形腔室，阴极采用上述炭黑- 石墨-PTFE空气扩散阴极，阳极采用Pt片(1cm*1cm)，阴阳极之间距离为2cm。The common single-chamber reactor is a cylindrical chamber with a diameter of 3cm and a length of 4cm. The cathode adopts the above-mentioned carbon black-graphite-PTFE air diffusion cathode, and the anode adopts a Pt sheet (1cm*1cm), and the distance between the cathode and anode is 2cm.
实施例1Example 1
分别向阳极室和两个阴极室注入200mL浓度为0.05M的Na2SO4电解液，将钛/二氧化铱复合金属板连接直流电源正极，两个阴极都连接在直流电源负极，打开电源开关，调节电流大小为70mA，运行20min后，用草酸钛钾分光光度法检测H2O2浓度，两个阴极室的H2O2浓度为30mg/L和25mg/L，电流效率为75％。Inject 200mL Na2 SO4 electrolyte with a concentration of 0.05M into the anode chamber and the two cathode chambers respectively, connect the titanium/iridium dioxide composite metal plate to the positive electrode of the DC power supply, both cathodes are connected to the negative electrode of the DC power supply, and turn on the power switch , adjust the current size to 70mA, after running for 20min, use potassium titanium oxalate spectrophotometry to detect the H2O2 concentration, theH2O2 concentration of thetwo cathode chambers are30mg /L and25mg /L, and the current efficiency is 75%.
实施例2Example 2
分别向阳极室和两个阴极室注入200mL浓度为0.05M的Na2SO4电解液，将钛/二氧化铱复合金属板连接直流电源正极，两个阴极都连接在直流电源负极，打开电源开关，调节电流大小为140mA，运行20min后，用草酸钛钾分光光度法检测H2O2浓度，两个阴极室的H2O2浓度为71mg/L和72mg/L，电流效率为 96％。Inject 200mL Na2 SO4 electrolyte with a concentration of 0.05M into the anode chamber and the two cathode chambers respectively, connect the titanium/iridium dioxide composite metal plate to the positive electrode of the DC power supply, both cathodes are connected to the negative electrode of the DC power supply, and turn on the power switch , adjust the current size to 140mA, after running for 20min, detect H2 O2 concentration with potassium titanium oxalate spectrophotometry, the H2 O2 concentration of the two cathode chambers are 71mg/L and 72mg/L, and the current efficiency is 96%.
实施例3Example 3
分别向阳极室和两个阴极室注入200mL浓度为0.05M的Na2SO4电解液，将钛/二氧化铱复合金属板连接直流电源正极，两个阴极都连接在直流电源负极，打开电源开关，调节电流大小为210mA，运行20min后，用草酸钛钾分光光度法检测H2O2浓度，两个阴极室的H2O2浓度为120mg/L和111mg/L，电流效率为 100％。Inject 200mL Na2 SO4 electrolyte with a concentration of 0.05M into the anode chamber and the two cathode chambers respectively, connect the titanium/iridium dioxide composite metal plate to the positive electrode of the DC power supply, both cathodes are connected to the negative electrode of the DC power supply, and turn on the power switch , adjust the current size to 210mA, after running for 20min, use titanium potassium oxalate spectrophotometry to detect the H2O2 concentration, theH2O2 concentration of thetwo cathode chambers are120mg /L and111mg /L, and the current efficiency is 100%.
实施例4Example 4
分别向阳极室和两个阴极室注入200mL浓度为0.05M的Na2SO4电解液，将钛/二氧化铱复合金属板连接直流电源正极，两个阴极都连接在直流电源负极，打开电源开关，调节电流大小为280mA，运行20min后，用草酸钛钾分光光度法检测H2O2浓度，两个阴极室的H2O2浓度为131mg/L和146mg/L，电流效率为94％。Inject 200mL Na2 SO4 electrolyte with a concentration of 0.05M into the anode chamber and the two cathode chambers respectively, connect the titanium/iridium dioxide composite metal plate to the positive electrode of the DC power supply, both cathodes are connected to the negative electrode of the DC power supply, and turn on the power switch , adjust the current size to 280mA, after running for 20min, use titanium potassium oxalate spectrophotometry to detect the H2 O2 concentration, the H2 O2 concentration of the two cathode chambers are 131mg/L and 146mg/L, and the current efficiency is 94%.
实施例5Example 5
分别向阳极室和两个阴极室注入200mL浓度为0.05M的Na2SO4电解液，将钛/二氧化铱复合金属板连接直流电源正极，两个阴极都连接在直流电源负极，打开电源开关，调节电流大小为350mA，运行20min后，用草酸钛钾分光光度法检测H2O2浓度，两个阴极室的H2O2浓度为167mg/L和187mg/L，电流效率为95％。Inject 200mL Na2 SO4 electrolyte with a concentration of 0.05M into the anode chamber and the two cathode chambers respectively, connect the titanium/iridium dioxide composite metal plate to the positive electrode of the DC power supply, both cathodes are connected to the negative electrode of the DC power supply, and turn on the power switch , adjust the current size to 350mA, after running for 20min, use titanium potassium oxalate spectrophotometry to detect the H2 O2 concentration, the H2 O2 concentration of the two cathode chambers are 167mg/L and 187mg/L, and the current efficiency is 95%.
实施例6Example 6
向普通的单室反应器注入28mL浓度为0.05M的Na2SO4电解液，将Pt片连接直流电源正极，阴极连接在直流电源负极，打开直流电源，调节电流大小为 35mA，运行20min后，用草酸钛钾分光光度法检测H2O2浓度，H2O2浓度为 173mg/L，电流效率为65％。Inject 28mL Na2 SO4 electrolyte with a concentration of 0.05M into a common single-chamber reactor, connect the Pt sheet to the positive pole of the DC power supply, connect the cathode to the negative pole of the DC power supply, turn on the DC power supply, and adjust the current to 35mA. After running for 20min, The concentration of H2 O2 was detected by potassium titanium oxalate spectrophotometry, and the concentration of H2 O2 was 173 mg/L, and the current efficiency was 65%.
实施例7Example 7
向普通的单室反应器注入28mL浓度为0.05M的Na2SO4电解液，将Pt片连接直流电源正极，阴极连接在直流电源负极，打开直流电源，调节电流大小为 70mA，运行20min后，用草酸钛钾分光光度法检测H2O2浓度，H2O2浓度为 353mg/L，电流效率为67％。Inject 28mL Na2 SO4 electrolyte with a concentration of 0.05M into a common single-chamber reactor, connect the Pt sheet to the positive pole of the DC power supply, connect the cathode to the negative pole of the DC power supply, turn on the DC power supply, and adjust the current to 70mA. After running for 20min, The concentration of H2 O2 was detected by potassium titanium oxalate spectrophotometry, and the concentration of H2 O2 was 353 mg/L, and the current efficiency was 67%.
实施例8Example 8
向普通的单室反应器注入28mL浓度为0.05M的Na2SO4电解液，将Pt片连接直流电源正极，阴极连接在直流电源负极，打开直流电源，调节电流大小为 105mA，运行20min后，用草酸钛钾分光光度法检测H2O2浓度，H2O2浓度为 611mg/L，电流效率为77％。Inject 28 mL of Na2 SO4 electrolyte with a concentration of 0.05M into an ordinary single-chamber reactor, connect the Pt sheet to the positive pole of the DC power supply, and connect the cathode to the negative pole of the DC power supply, turn on the DC power supply, and adjust the current to 105 mA. After running for 20 minutes, The concentration of H2 O2 was detected by potassium titanium oxalate spectrophotometry, and the concentration of H2 O2 was 611 mg/L, and the current efficiency was 77%.
实施例9Example 9
向普通的单室反应器注入28mL浓度为0.05M的Na2SO4电解液，将Pt片连接直流电源正极，阴极连接在直流电源负极，打开直流电源，调节电流大小为 140mA，运行20min后，用草酸钛钾分光光度法检测H2O2浓度，H2O2浓度为 888mg/L，电流效率为84％。Inject 28mL Na2 SO4 electrolyte with a concentration of 0.05M into a common single-chamber reactor, connect the Pt sheet to the positive pole of the DC power supply, connect the cathode to the negative pole of the DC power supply, turn on the DC power supply, and adjust the current to 140mA. After running for 20min, The concentration of H2 O2 was detected by potassium titanium oxalate spectrophotometry, and the concentration of H2 O2 was 888 mg/L, and the current efficiency was 84%.
实施例10Example 10
向普通的单室反应器注入28mL浓度为0.05M的Na2SO4电解液，将Pt片连接直流电源正极，阴极连接在直流电源负极，打开直流电源，调节电流大小为 175mA，运行20min后，用草酸钛钾分光光度法检测H2O2浓度，H2O2浓度为1000mg/L，电流效率为75％。Inject 28mL Na2 SO4 electrolyte with a concentration of 0.05M into the common single-chamber reactor, connect the Pt sheet to the positive pole of the DC power supply, connect the cathode to the negative pole of the DC power supply, turn on the DC power supply, and adjust the current to 175mA. After running for 20min, The concentration of H2 O2 was detected by potassium titanium oxalate spectrophotometry, the concentration of H2 O2 was 1000 mg/L, and the current efficiency was 75%.
应当理解的是，这里所讨论的实施方案及实例只是为了说明，对本领域技术人员来说，可以加以改进或变换，而所有这些改进和变换都应属于本实用新型所附权利要求的保护范围。It should be understood that the embodiments and examples discussed here are only for illustration, and for those skilled in the art, improvements or changes can be made, and all these improvements and changes should belong to the protection scope of the appended claims of the present invention.
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| CN110760876A (en)* | 2019-08-19 | 2020-02-07 | 天津大学 | A three-chamber reactor device for efficient synthesis of H2O2 |
| 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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| CN110760876A (en)* | 2019-08-19 | 2020-02-07 | 天津大学 | A three-chamber reactor device for efficient synthesis of H2O2 |
| 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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