Flow electrochemical cell device for electrolyzing carbon dioxide
Through the flow electrochemical cell technology, the oxidation and reduction reaction is carried out in the gas diffusion layer supported by the catalyst, and carbon dioxide is converted into carbon-based compounds such as methanol and ethylene, which solves the problems of reagent pollution and high cost in the prior art, and achieves an efficient and safe carbon dioxide conversion effect.
Patent Information
- Application Number
- CN202421575370.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-04
- Publication Date
- 2025-04-22
- Estimated Expiration
- 2034-07-04
AI Technical Summary
The prior art uses reagents in carbon dioxide redox reactions to cause environmental pollution, which is costly and has safety risks, and the purification cost of carbon dioxide is relatively high.
Using flow electrochemical cell technology, the anode and cathode electrolyte are used to perform a redox reaction in the gas diffusion layer supported by the catalyst, and carbon dioxide is converted into carbon-based compounds such as methanol and ethylene, and the reaction efficiency and conversion rate are improved using the solid-liquid-gas three-phase reaction interface.
The efficient conversion of carbon dioxide into useful chemicals is achieved, reducing environmental pollution and costs, and improving reaction efficiency and safety.
Smart Images
Figure CN222781700U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of electrolysis, and in particular relates to a flow electrochemical cell device for electrolyzing carbon dioxide. Background Art
[0002] The "dual carbon" strategy advocates a green, environmentally friendly, and low-carbon lifestyle; the flow electrochemical cell technology has a wide range of applications in the field of carbon dioxide neutralization reactions, covering multiple aspects from carbon capture to utilization, from atmospheric regulation to ecosystem engineering, and provides important technical support for addressing climate change and achieving carbon neutrality goals. The flow electrochemical cell technology can be used for energy conversion by converting carbon dioxide into a stable or reusable form, such as carbonate rock storage or carbon-based compounds such as methanol and ethylene, for energy storage or chemical raw material production;
[0003] A flow electrochemical cell is a device that combines chemical reactions with electrochemical reactions. It consists of two electrodes and a fluid reservoir containing an electrolyte, and its working principle is based on the chemical reaction between the electrode surface and the electrolyte solution when the electrolyte solution flows between the electrodes. Usually, the flow cell is connected to two electrodes, one connected to the anode of the power supply and the other connected to the cathode of the power supply, which are immersed in the electrolyte solution;
[0004] The current existing technology is to complete the carbon dioxide redox reaction through reagents. The reagents will cause certain pollution to the environment, especially when treating wastewater or waste liquid, and a large amount of reagents are required in certain circumstances, which also increases the cost. The use of reagents is risky in the case of improper operation or equipment failure, and is prone to safety risks such as chemical leakage. The CO2 used in the reaction also needs to be purified before use, otherwise it will easily lead to increased costs. Utility Model Content
[0005] The purpose of the utility model is to provide a flow electrochemical cell device for electrolyzing carbon dioxide to solve the problems raised in the above background technology.
[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0007] A flow electrochemical cell device for electrolyzing carbon dioxide, comprising:
[0008] An outer shell, wherein an anode chamber is provided at the upper end of the inner part of the outer shell, the anode chamber is electrically connected to the anode of an external power supply, an anode electrolyte is provided inside the anode chamber, that is, the anode electrolyte is pumped into the inner part of the anode chamber by a peristaltic pump, a gas chamber is also provided inside the outer shell, carbon dioxide gas is provided inside the gas chamber, the gas chamber is located on one side of the anode chamber, a reaction chamber is also provided inside the outer shell, the reaction chamber is located below the anode chamber, the reaction chamber is communicated with the anode chamber and the gas chamber respectively, a loaded catalyst is provided inside the reaction chamber, a cathode electrolyte and carbon dioxide gas are separated by a gas diffusion layer of the loaded catalyst, a cathode chamber is provided on one side of the inner part of the outer shell, the cathode chamber is electrically connected to the cathode of an external power supply, a cathode electrolyte is provided inside the cathode chamber, that is, the cathode electrolyte is pumped into the inner part of the cathode chamber by a peristaltic pump, the cathode chamber is communicated with the reaction chamber, and the reaction chamber is also connected to The product after the reaction flows into the reference chamber. When the power is turned on, the carbon dioxide gas enters the gas chamber, passes through the gas diffusion layer of the loaded catalyst to reach the surface of the loaded catalyst, and an oxidation-reduction reaction occurs. The gas after the reaction flows out from the gas discharge chamber. The cathode electrolyte and the anode electrolyte are circulated in the cathode chamber and the anode chamber respectively through peristaltic pumps. The carbon dioxide gas, the cathode electrolyte and the anode electrolyte react inside the reaction chamber through the loaded catalyst to generate carbon-based compounds such as methanol and ethylene, which can be used for energy storage or chemical raw material production, and flow into the reference chamber. The reference chamber is inserted with a reference electrode to test and observe the reaction. After the cathode electrolyte and the anode electrolyte react, they finally flow out of the liquid discharge chamber. By using the flow electrochemical cell technology, the carbon dioxide gas can directly enter the back of the loaded catalyst and form a solid-liquid-gas three-phase reaction interface with the electrolyte. The three-phase reaction interface solves the problem of low solubility of carbon dioxide at normal temperature and pressure, and greatly improves the reaction efficiency and conversion rate.
[0009] Preferably, an anion exchange membrane is disposed inside the anode chamber to separate the anode and cathode chambers and prevent the product from flowing from the cathode chamber to the anode chamber for oxidation.
[0010] Preferably, the gas chamber is also connected to a gas exhaust chamber for the outflow of post-reaction gas.
[0011] Preferably, the reaction chamber is also connected to a liquid discharge chamber for discharging the cathode electrolyte and the anode electrolyte after the reaction.
[0012] Preferably, a reference electrode is provided inside the reference chamber for testing the product after the reaction and observing the reaction.
[0013] Preferably, the outer shell includes an outer fixing plate 1, an outer fixing plate 2, an intermediate plate, a mounting plate 1 and a mounting plate 2; the intermediate plate is arranged between the outer fixing plate 1 and the outer fixing plate 2; a silicone gasket is arranged on the outer side of the intermediate plate; the mounting plate 1 is arranged on one side of the silicone gasket; the mounting plate 2 is arranged on the other side of the silicone gasket; the mounting plate 1 and the mounting plate 2 are both located between the outer fixing plate 1 and the outer fixing plate 2; sealing gaskets are arranged between each of the outer fixing plate 1, the outer fixing plate 2, the intermediate plate, the mounting plate 1 and the mounting plate 2 to perform a sealing function.
[0014] Compared with the prior art, the beneficial effects of the utility model are:
[0015] 1. Flow electrochemical cell technology can be used to convert carbon dioxide into useful chemicals or fuels to achieve carbon recycling and utilization; for example, through electrochemical catalytic reactions, carbon dioxide can be converted into carbon-based compounds such as methanol and ethylene for energy storage or chemical raw material production;
[0016] 2. Flow electrochemical cell technology can be used for neutralization of carbon dioxide in the atmosphere and climate regulation. It can further explore the local regulation and control of carbon dioxide concentration, which will help mitigate the impact of global climate change.
[0017] 3. In the field of ecosystem engineering, flow cell technology can also be used to build a carbon cycle ecosystem. Through artificial intervention and control, it can promote the fixation and recycling of carbon dioxide in soil and water, enhance the carbon sink function of the ecosystem, and facilitate long-term use;
[0018] 4. By using the flow electrochemical cell technology, carbon dioxide gas can directly enter the back of the loaded catalyst and form a solid-liquid-gas three-phase reaction interface with the electrolyte. The three-phase reaction interface solves the problem of low solubility of carbon dioxide at normal temperature and pressure, and greatly improves the reaction efficiency and conversion rate. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0020] Figure 2 It is a schematic diagram of the internal structure of the utility model;
[0021] In the figure: 1. Outer fixed plate 1; 2. Middle plate; 3. Mounting plate 1; 4. Outer fixed plate 2; 5. Silicone gasket; 6. Reference chamber; 7. Anode chamber; 8. Gas chamber; 9. Anion exchange membrane; 10. Cathode chamber; 11. Reaction chamber; 12. Loaded catalyst; 13. Mounting plate 2. DETAILED DESCRIPTION
[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0023] Example:
[0024] See also Figure 1-Figure 2 As shown, a flow electrochemical cell device for electrolyzing carbon dioxide comprises:
[0025] The outer shell has an anode chamber 7 disposed at the upper end thereof, the anode chamber 7 being electrically connected to the anode of the external power source, the anode chamber 7 being provided with an anode electrolyte, that is, the anode electrolyte being continuously pumped into the anode chamber 7 by a peristaltic pump, the outer shell also has a gas chamber 8 disposed therein, the gas chamber 8 being provided with carbon dioxide gas, that is, the carbon dioxide gas continuously enters the gas chamber 8, the gas chamber 8 being located on one side of the anode chamber 7, the outer shell also has a reaction chamber 11 disposed therein, the reaction chamber 11 being located below the anode chamber 7, the reaction chamber 11 being respectively connected to the anode chamber 7 and the reaction chamber 11 being ... The chamber 7 and the gas chamber 8 are interconnected, a loaded catalyst 12 is arranged inside the reaction chamber 11, a cathode electrolyte and carbon dioxide gas are separated by a gas diffusion layer of the loaded catalyst 12, a cathode chamber 10 is arranged on one side of the inner side of the outer shell, the cathode chamber 10 is electrically connected to the cathode of the external power supply, a cathode electrolyte is arranged inside the cathode chamber 10, that is, the cathode electrolyte is continuously pumped into the cathode chamber 10 by a peristaltic pump, the cathode chamber 10 is interconnected with the reaction chamber 11, the reaction chamber 11 is also connected to the reference chamber 6, and the product after the reaction flows into the reference chamber 6, Furthermore, a 1 mm through hole is provided between the reaction chamber 11 and the reference chamber 6, which is conducive to the reaction product flowing into the interior of the reference chamber 6; when the power is turned on, the carbon dioxide gas enters the gas chamber 8, passes through the gas diffusion layer of the supported catalyst 12 to reach the surface of the supported catalyst 12, and a redox reaction occurs. The gas after the reaction flows out from the gas discharge chamber, and the cathode electrolyte and the anode electrolyte are circulated in the cathode chamber 10 and the anode chamber 7 respectively through the peristaltic pump, and the carbon dioxide gas, the cathode electrolyte and the anode electrolyte are circulated in the interior of the reaction chamber 11 through the supported catalyst 12. The reaction generates carbon-based compounds such as methanol and ethylene, which can be used for energy storage or chemical raw material production, and flows into the reference chamber 6. A reference electrode is inserted above the reference chamber 6 to test and observe the reaction. After the cathode electrolyte and the anode electrolyte react, they eventually flow out of the liquid discharge chamber. By using the flow electrochemical cell technology, the carbon dioxide gas can directly enter the back of the loaded catalyst 12 to form a solid-liquid-gas three-phase reaction interface with the electrolyte. The three-phase reaction interface solves the problem of low solubility of carbon dioxide at room temperature and pressure, and greatly improves the reaction efficiency and conversion rate.
[0026] refer to Figure 1-Figure 2 As shown, an anion exchange membrane 9 is disposed inside the anode chamber 7 to separate the anode and cathode chambers 7 and prevent the product from flowing from the cathode chamber 10 to the anode chamber 7 for oxidation.
[0027] refer to Figure 1-Figure 2 As shown, the gas chamber 8 is also connected to a gas exhaust chamber for the outflow of the gas after the reaction.
[0028] refer to Figure 1-Figure 2As shown, the reaction chamber 11 is also connected to a liquid discharge chamber for discharging the cathode electrolyte and the anode electrolyte after the reaction.
[0029] refer to Figure 1-Figure 2 As shown, a reference electrode is disposed inside the reference chamber 6 for testing the reaction product and observing the reaction.
[0030] refer to Figure 1-Figure 2 As shown, the outer shell includes an outer fixing plate 1, an outer fixing plate 2 4, an intermediate plate 2, a mounting plate 3 and a mounting plate 2 13. An intermediate plate 2 is arranged between the outer fixing plate 1 and the outer fixing plate 2 4. A silicone gasket 5 is arranged on the outer side of the intermediate plate 2. A mounting plate 3 is arranged on one side of the silicone gasket 5, and a mounting plate 2 13 is arranged on the other side of the silicone gasket 5. The mounting plate 1 3 and the mounting plate 2 13 are both located between the outer fixing plate 1 and the outer fixing plate 2 4. Sealing gaskets are arranged between the outer fixing plate 1, the outer fixing plate 2 4, the intermediate plate 2, the mounting plate 3 and the mounting plate 2 13 to play a sealing role.
[0031] 1. Flow electrochemical cell technology can also be used to convert carbon dioxide into useful chemicals or fuels to achieve carbon recycling and utilization; for example, through electrochemical catalytic reactions, carbon dioxide can be converted into carbon-based compounds such as methanol and ethylene for energy storage or chemical raw material production;
[0032] 2. Flow electrochemical cell technology can be used for neutralization of carbon dioxide in the atmosphere and climate regulation. It can further explore the local regulation and control of carbon dioxide concentration, which will help mitigate the impact of global climate change.
[0033] 3. In the field of ecosystem engineering, flow cell technology can also be used to build a carbon cycle ecosystem. Through artificial intervention and control, it can promote the fixation and recycling of carbon dioxide in soil and water, enhance the carbon sink function of the ecosystem, and facilitate long-term use;
[0034] 4. By using the flow electrochemical cell technology, carbon dioxide gas can directly enter the back of the loaded catalyst and form a solid-liquid-gas three-phase reaction interface with the electrolyte. The three-phase reaction interface solves the problem of low solubility of carbon dioxide at normal temperature and pressure, and greatly improves the reaction efficiency and conversion rate.
[0035] Flow electrochemical cell technology can achieve precise control of reaction conditions, including temperature, pressure, solvent, catalyst and other factors, thereby optimizing the reaction process and improving reaction selectivity and yield.
[0036] The flow cell system can be flexibly designed and expanded to adapt to production needs of different scales, and has application potential from small laboratories to industrial production.
[0037] Flow cell technology generally has efficient reaction control and separation processes, which can reduce the generation of by-products and reduce waste disposal costs.
[0038] Flow cell systems usually require less reaction materials because they can be continuously supplied and recycled, thus saving raw material costs.
[0039] Since the reactants flow continuously, flow cell technology can reduce the exposure time of the reactants to high temperature or high pressure conditions, reducing safety risks.
[0040] Flow cell technology can be applied to complex chemical reactions, including the use of catalysts, the continuous implementation of multi-step reactions, etc., which helps to achieve efficient carbon dioxide conversion.
[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A flow electrochemical cell device for electrolyzing carbon dioxide, characterized in that: include: An outer shell, wherein an anode chamber (7) is arranged at the upper end of the inner part of the outer shell, the anode chamber (7) is electrically connected to the anode of an external power source, an anode electrolyte is arranged inside the anode chamber (7), a gas chamber (8) is arranged inside the outer shell, carbon dioxide gas is arranged inside the gas chamber (8), the gas chamber (8) is located on one side of the anode chamber (7), and a reaction chamber (11) is arranged inside the outer shell, and the reaction chamber (11) is located below the anode chamber (7) The reaction chamber (11) is respectively connected to the anode chamber (7) and the gas chamber (8); a loaded catalyst (12) is arranged inside the reaction chamber (11); a cathode chamber (10) is arranged on one side of the inner part of the outer shell; the cathode chamber (10) is electrically connected to the cathode of an external power source; a cathode electrolyte is arranged inside the cathode chamber (10); the cathode chamber (10) is connected to the reaction chamber (11); and the reaction chamber (11) is also connected to a reference chamber (6).
2. A flow electrochemical cell device for electrolyzing carbon dioxide according to claim 1, characterized in that: An anion exchange membrane (9) is arranged inside the anode chamber (7).
3. The flow electrochemical cell device for electrolyzing carbon dioxide according to claim 1, characterized in that: The gas chamber (8) is also connected to a gas exhaust chamber.
4. The flow electrochemical cell device for electrolyzing carbon dioxide according to claim 1, characterized in that: The reaction chamber (11) is also connected to a liquid discharge chamber.
5. The flow electrochemical cell device for electrolyzing carbon dioxide according to claim 1, characterized in that: A reference electrode is arranged inside the reference chamber (6).
6. The flow electrochemical cell device for electrolyzing carbon dioxide according to claim 1, characterized in that: The outer shell comprises an outer fixing plate 1 (1), an outer fixing plate 2 (4), an intermediate plate (2), a mounting plate 1 (3) and a mounting plate 2 (13); the intermediate plate (2) is arranged between the outer fixing plate 1 (1) and the outer fixing plate 2 (4); a silicone gasket (5) is arranged on the outer side of the intermediate plate (2); the mounting plate 1 (3) is arranged on one side of the silicone gasket (5); the mounting plate 2 (13) is arranged on the other side of the silicone gasket (5); the mounting plate 1 (3) and the mounting plate 2 (13) are both located between the outer fixing plate 1 (1) and the outer fixing plate 2 (4).