High-efficiency electrocatalytic oxidation-reduction galvanic pile structure
By separating the electrocatalytic reaction into separate oxidation and reduction reaction systems, the problem of mixing of anode and cathode products is solved, enabling direct separation and efficient electrocatalytic conversion of products, reducing separation costs and improving catalytic efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ANHUI YUANZHOU GREEN CARBON TECHNOLOGY CO LTD
- Filing Date
- 2025-06-25
- Publication Date
- 2026-05-15
AI Technical Summary
The existing electrocatalytic stack structure leads to the mixing of products at the anode and cathode, requiring additional separation processes, increasing catalytic costs, and resulting in uneven dispersion and low catalytic efficiency during gas-liquid-solid three-phase catalysis.
A highly efficient electrocatalytic redox stack structure is designed, which separates the electrocatalytic reaction into separate oxidation and reduction reaction systems. The reaction is separated by connecting the external pipeline of the cathode to the internal flow channel and the external pipeline of the anode to the internal flow channel. The separation of the anode and cathode products is achieved by using a separator membrane assembly, and the stack is fixedly assembled with bolts and nuts.
It achieves direct separation of anode and cathode products, reduces separation costs, improves electrocatalytic conversion efficiency and feedstock dispersibility, and enhances electrocatalytic efficiency.
Smart Images
Figure CN224243224U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electrocatalytic continuous flow reactor technology, specifically to a high-efficiency electrocatalytic redox stack structure. Background Technology
[0002] Electrocatalytic reactor stacks, as a key technology in the intersection of energy and chemical engineering, are integrated systems composed of multiple electrochemical single cells connected in series or parallel. They are used to carry out electrocatalytic reactions efficiently. Their core objective is to improve reaction efficiency through large-scale design, and they are widely used in hydrogen production, CO2 conversion, fuel cells, and ammonia synthesis.
[0003] Currently, the most widely developed technology is the water electrolysis stack, which places the anode and cathode electrodes in a flowing electrolyte to produce hydrogen and oxygen. However, a significant problem with this type of stack is that the anode and cathode electrodes are in the same environment, leading to cross-contamination of products. Further separation is required to purify the products. In carbon dioxide electrocatalysis, alkali is commonly used as the cathode electrolyte, and carbon dioxide is simultaneously introduced into the alkali for saturation absorption before electrocatalysis. This significantly reduces the utilization efficiency of carbon dioxide. This invention designs a highly efficient electrocatalytic stack structure with a dual-chamber design, enabling independent anode and cathode reactions and reducing product separation costs. At the same time, the multi-plate dispersion channel design increases gas-liquid high dispersibility and effectively combines electron and ion transport to increase electrocatalytic efficiency.
[0004] Although the device has many beneficial effects, it still has the following problems: During the use of the device, the electrocatalytic stack structure design leads to the mixing of products at the anode and cathode, making it impossible to directly produce the target product. It is necessary to add a separation process to purify the product, which increases the catalytic cost. Secondly, the simple stack structure of the device leads to uneven gas-liquid dispersion and low catalytic efficiency during gas-liquid-solid three-phase catalysis, which needs to be improved. In view of this, we propose a high-efficiency electrocatalytic redox stack structure. Utility Model Content
[0005] The purpose of this section is to outline some aspects of the embodiments of this utility model and to briefly introduce some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be used to limit the scope of this utility model.
[0006] 1. Technical problems to be solved:
[0007] To address the issues of mixed anode and cathode products due to the aforementioned electrocatalytic stack structure design, which prevents the direct production of the target product and necessitates additional separation processes for product purification, thus increasing catalytic costs, and the simple stack structure leading to uneven gas-liquid dispersion and low catalytic efficiency during gas-liquid-solid three-phase catalysis, this invention is proposed.
[0008] Therefore, the purpose of this invention is to provide a highly efficient electrocatalytic oxidation-reduction stack structure that separates the electrocatalytic reaction into separate oxidation and reduction reaction systems, thereby achieving the separation of anode and cathode products, eliminating the mixing of anode and cathode electrolytes, raw materials to be reacted, unreacted raw materials and products, reducing separation costs, and effectively improving electrocatalytic conversion efficiency through the dispersed flow channel.
[0009] 2. Technical Solution:
[0010] To solve the above-mentioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution:
[0011] A high-efficiency electrocatalytic oxidation-reduction stack structure includes a cathode sealing plate. The sidewall of the cathode sealing plate is provided with a connecting plate for external cathode pipes and internal flow channels. The sidewall of the connecting plate is provided with a cathode power conductive plate. The sidewall of the cathode power conductive plate is provided with a dispersion plate. The sidewall of the dispersion plate is provided with a cathode electrode fixing plate. The sidewall of the cathode electrode fixing plate is provided with a separator membrane assembly. The sidewall of the separator membrane assembly is provided with an anode electrode fixing plate. The sidewall of the anode electrode fixing plate is provided with a flow channel sealing plate. The sidewall of the flow channel sealing plate is provided with an anode power conductive plate. The sidewall of the anode power conductive plate is provided with a connecting plate for external anode pipes and internal flow channels. The sidewall of the connecting plate is provided with an anode sealing plate. Multiple cathode pipes are transversely connected to the sidewall of the cathode sealing plate. Multiple anode pipes are longitudinally connected to the sidewall of the cathode sealing plate. Multiple bolts are threadedly connected to the sidewall of the anode sealing plate, and a nut is threaded to one end of the outer circumference of each bolt.
[0012] As a preferred embodiment of the high-efficiency electrocatalytic oxidation-reduction stack structure of this utility model, the top of the cathode sealing plate sidewall is provided with multiple cathode inlets laterally, one side of the cathode sealing plate sidewall is provided with multiple anode inlets longitudinally, the bottom of the top sidewall of the anode sealing plate is provided with multiple cathode outlets laterally, one side of the top sidewall of the anode sealing plate is provided with multiple anode outlets longitudinally, and both ends of the outer circumference of the cathode pipe and the anode pipe are provided with joints.
[0013] As a preferred embodiment of the high-efficiency electrocatalytic oxidation-reduction stack structure of this utility model, the isolation membrane assembly includes a sealing membrane, an anion membrane is provided on one side of the inner cavity sidewall of the sealing membrane, a diaphragm is provided on the sidewall of the anion membrane, and a cation membrane is provided on the sidewall of the diaphragm.
[0014] In a preferred embodiment of the high-efficiency electrocatalytic oxidation-reduction stack structure of this utility model, the bolts and nuts are made of stainless steel, and the connectors are made of PTFE.
[0015] In a preferred embodiment of the high-efficiency electrocatalytic oxidation-reduction stack structure of this utility model, the cathode sealing plate and the anode sealing plate are both made of glass fiber, and the dispersion plate is made of CPVC.
[0016] In a preferred embodiment of the high-efficiency electrocatalytic oxidation-reduction stack structure of this utility model, both the cathode power conductive plate and the anode power conductive plate are made of copper, and both the cathode power conductive plate and the anode power conductive plate are provided with ear plates on their tops, with through holes opened in the sidewalls of the ear plates.
[0017] In a preferred embodiment of the high-efficiency electrocatalytic oxidation-reduction stack structure of this utility model, the connecting plate between the external cathode pipe and the internal flow channel and the connecting plate between the external anode pipe and the internal flow channel are both made of titanium, and the sealing film is made of silicone rubber.
[0018] 3. Beneficial effects:
[0019] Compared with the prior art, the beneficial effects of this utility model are:
[0020] This highly efficient electrocatalytic oxidation-reduction stack structure separates the electrocatalytic reaction into separate oxidation and reduction reaction systems through the cathode external pipeline and internal flow channel connection plate 2 and the anode external pipeline and internal flow channel connection plate 10. This directly achieves the separation of anode and cathode products, eliminating the mixing of anode and cathode electrolytes, raw materials to be reacted, unreacted raw materials and products, and reducing separation costs. The cathode sealing plate 1, cathode external pipeline and internal flow channel connection plate 2, cathode power conductive plate 3, dispersion plate 4, cathode electrode fixing plate 5, isolation membrane assembly 6, anode electrode fixing plate 7, flow channel sealing plate 8, anode power conductive plate 9, anode external pipeline and internal flow channel connection plate 10, and cathode sealing plate 11 are assembled sequentially. Then, bolts 14 are screwed into the anode sealing plate 11 to connect the cathode sealing plate 1, and nuts 15 are tightened to fix the stack and complete the stack assembly.
[0021] This high-efficiency electrocatalytic oxidation-reduction stack structure facilitates connection between the stack structure plate and external pipes via connector 20. The cathode inlet 16 corresponds to the cathode outlet 18, and the anode inlet 17 corresponds to the anode outlet 19, which facilitates the dispersion channel, improves the dispersibility of raw materials, and effectively enhances the electrocatalytic efficiency. Attached Figure Description
[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:
[0023] Figure 1 This is a schematic diagram of the overall structure of a high-efficiency electrocatalytic redox stack according to the present invention;
[0024] Figure 2 This is a schematic diagram of the temporal part of the telescopic column structure of a high-efficiency electrocatalytic redox stack structure according to this utility model;
[0025] Figure 3 This is a schematic diagram of the flow channel sealing plate and cathode pipeline structure of a high-efficiency electrocatalytic oxidation-reduction stack according to this utility model.
[0026] Figure 4 This is a schematic diagram showing the disassembled crossbeam support beam structure of a high-efficiency electrocatalytic oxidation-reduction stack according to this utility model.
[0027] Figure 5 This is a schematic diagram of the anion exchange membrane structure of a high-efficiency electrocatalytic redox stack according to the present invention.
[0028] The following are the labeling instructions in the diagram: 1. Cathode sealing plate; 2. Connection plate between external cathode piping and internal flow channel; 3. Cathode power supply conductive plate; 4. Dispersion plate; 5. Cathode electrode fixing plate; 6. Separating membrane assembly; 7. Anode electrode fixing plate; 8. Flow channel sealing plate; 9. Anode power supply conductive plate; 10. Connection plate between external anode piping and internal flow channel; 11. Anode sealing plate; 12. Cathode piping; 13. Anode piping; 14. Bolt; 15. Nut; 16. Cathode inlet; 17. Anode inlet; 18. Cathode outlet; 19. Anode outlet; 20. Connector; 601. Sealing membrane; 602. Anion exchange membrane; 603. Diaphragm; 604. Cation exchange membrane. Detailed Implementation
[0029] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.
[0030] This utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not be construed as limiting the scope of protection of this utility model. In actual manufacturing, the three-dimensional spatial dimensions of length, width, and depth should be included.
[0031] The orientation or positional relationship indicated in the terminology is based on the orientation or positional relationship shown in the accompanying drawings and is only for the convenience of describing the present invention and simplifying the description. It is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.
[0032] The term "connection method" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0033] The embodiments of this utility model will now be described in further detail with reference to the accompanying drawings.
[0034] This utility model provides an overall structural schematic diagram of one embodiment of a high-efficiency electrocatalytic redox stack structure, including:
[0035] Please see Figures 1-5This embodiment of a high-efficiency electrocatalytic oxidation-reduction stack structure includes a cathode sealing plate 1. A cathode external pipeline and internal flow channel connecting plate 2 are fixedly mounted on the side wall of the cathode sealing plate 1. A cathode power conductive plate 3 is fixedly mounted on the side wall of the cathode external pipeline and internal flow channel connecting plate 2. A dispersion plate 4 is fixedly mounted on the side wall of the cathode power conductive plate 3. A cathode electrode fixing plate 5 is fixedly mounted on the side wall of the dispersion plate 4. A separator membrane assembly 6 is fixedly mounted on the side wall of the cathode electrode fixing plate 5. An anode electrode fixing plate 7 is fixedly mounted on the side wall of the separator membrane assembly 6. A flow channel sealing plate 8 is fixedly mounted on the side wall of the anode electrode fixing plate 7. An anode power conductive plate 9 is fixedly mounted on the side wall of the flow channel sealing plate 8. A cathode external pipeline and internal flow channel connecting plate 10 are fixedly mounted on the side wall of the anode external pipeline and internal flow channel connecting plate 10. An anode sealing plate 11 is fixedly mounted on the side wall of the cathode sealing plate 1. Multiple cathode pipelines 12 are horizontally penetrated through the side wall of the cathode sealing plate 1. Multiple anode pipelines 13 are vertically penetrated through the side wall of the cathode sealing plate 1. The wall is threaded with multiple bolts 14, and each bolt 14 has a nut 15 threaded to one end of its outer circumference. The electrocatalytic reaction is separated into separate oxidation and reduction reaction systems by connecting the cathode external pipeline to the internal flow channel plate 2 and the anode external pipeline to the internal flow channel plate 10. This directly separates the anode and cathode products, preventing the mixing of anode and cathode electrolytes, raw materials to be reacted, unreacted raw materials and products, and reducing separation costs. The cathode sealing plate 1, cathode external pipeline to internal flow channel plate 2, cathode power conductive plate 3, dispersion plate 4, cathode electrode fixing plate 5, separator membrane assembly 6, anode electrode fixing plate 7, flow channel sealing plate 8, anode power conductive plate 9, anode external pipeline to internal flow channel plate 10, and cathode sealing plate 11 are assembled in sequence. The cathode electrode fixing plate 5 and anode electrode fixing plate 7 are connected for conductivity. Then, the bolts 14 are screwed into the anode sealing plate 11 to connect with the cathode sealing plate 1. The nuts 15 are tightened to fix the fuel cell stack and complete the fuel cell stack assembly.
[0036] It is worth noting that, in order to improve the electrocatalytic efficiency, specifically, the top of the side wall of the cathode sealing plate 1 is provided with multiple cathode inlets 16 laterally, one side of the side wall of the cathode sealing plate 1 is provided with multiple anode inlets 17 longitudinally, the bottom of the top side wall of the anode sealing plate 11 is provided with multiple cathode outlets 18 laterally, one side of the top side wall of the anode sealing plate 11 is provided with multiple anode outlets 19 longitudinally, and both ends of the outer circumference of the cathode pipe 12 and the anode pipe 13 are fixed with connectors 20. The connectors 20 facilitate the connection between the stack structure plate and the external pipes. The cathode inlets 16 correspond to the cathode outlets 18, and the anode inlets 17 correspond to the anode outlets 19, which facilitates the dispersion of the flow channel, improves the dispersion of raw materials, and effectively improves the electrocatalytic efficiency.
[0037] Next, to facilitate the isolation of cation and anion conduction, the isolation membrane assembly 6 specifically includes a sealing membrane 601, an anion membrane 602 fixedly mounted on one side of the inner cavity sidewall of the sealing membrane 601, a diaphragm 603 fixedly mounted on the sidewall of the anion membrane 602, and a cation membrane 604 fixedly mounted on the sidewall of the diaphragm 603. The anion and anion conduction are isolated by the anode and cathode reaction of the anion membrane 602, the diaphragm 603, and the cation membrane 604, and the sealing membrane 601 facilitates fixation and sealing.
[0038] Meanwhile, for corrosion resistance, the bolts 14 and nuts 15 are made of 304 stainless steel, and the connector 20 is made of PTFE. The 304 stainless steel bolts 14 and nuts 15 are resistant to acid, alkali and organic corrosion and can be used in different catalytic processes. PTFE is a polymer material with excellent chemical corrosion resistance, high temperature resistance and oxidation resistance.
[0039] Furthermore, in order to ensure uniform dispersion of multiphase raw materials, specifically, the cathode sealing plate 1 and the anode sealing plate 11 are both made of glass fiber, and the dispersion plate 4 is made of CPVC. The glass fiber cathode sealing plate 1 and the anode sealing plate 11 facilitate improved insulation, while CPVC has strong chemical stability and is resistant to heat, acid, alkali, salt, oxidant and other corrosion. The dispersion plate 4 facilitates uniform dispersion of multiphase raw materials before catalysis.
[0040] It is worth noting that, in order to facilitate conductivity, both the cathode power conductive plate 3 and the anode power conductive plate 9 are made of copper. Both the cathode power conductive plate 3 and the anode power conductive plate 9 have ear plates welded to their tops, and through holes are opened in the side walls of the ear plates. The copper cathode power conductive plate 3 and the anode power conductive plate 9 facilitate the improvement of conductivity, and the ear plates with through holes in their side walls facilitate connection with wires.
[0041] Finally, in order to improve the strength of the anode and cathode plates, specifically, the cathode external pipeline and internal flow channel connecting plate 2 and the anode external pipeline and internal flow channel connecting plate 10 are both made of titanium, and the sealing membrane 601 is made of silicone rubber. The titanium cathode external pipeline and internal flow channel connecting plate 2 and the anode external pipeline and internal flow channel connecting plate 10 improve strength and facilitate resistance to strong acids and alkalis, while the silicone rubber sealing membrane 601 facilitates insulation.
[0042] Combination Figures 1-5 The specific usage process of this embodiment of a high-efficiency electrocatalytic redox stack structure is as follows:
[0043] 1. According to the actual use, assemble the cathode sealing plate 1, cathode external pipeline and internal flow channel connection plate 2, cathode power supply conductive plate 3, dispersion plate 4, cathode electrode fixing plate 5, isolation membrane assembly 6, anode electrode fixing plate 7, flow channel sealing plate 8, anode power supply conductive plate 9, anode external pipeline and internal flow channel connection plate 10, and cathode sealing plate 11 in sequence. Screw the bolts 14 into the anode sealing plate 11 to connect the cathode sealing plate 1, and tighten the nuts 15 to separate the electrocatalytic reaction into separate oxidation and reduction reaction systems.
[0044] 2: Connector 20 connects the fuel cell stack structure plate to the external pipeline. Cathode inlet 16 corresponds to cathode outlet 18, and anode inlet 17 corresponds to anode outlet 19 in the dispersion channel.
Claims
1. A highly efficient electrocatalytic redox stack structure, characterized in that, The cathode sealing plate (1) is characterized in that: the cathode sealing plate (1) has a cathode external pipeline and internal flow channel connecting plate (2) on its side wall; the cathode external pipeline and internal flow channel connecting plate (2) has a cathode power conductive plate (3) on its side wall; the cathode power conductive plate (3) has a dispersion plate (4) on its side wall; the dispersion plate (4) has a cathode electrode fixing plate (5) on its side wall; the cathode electrode fixing plate (5) has an isolation membrane assembly (6) on its side wall; the isolation membrane assembly (6) has an anode electrode fixing plate (7) on its side wall; and the anode electrode fixing plate (7) has a flow channel sealing plate (8) on its side wall. The side wall of the flow channel sealing plate (8) is provided with an anode power conductive plate (9), the side wall of the anode power conductive plate (9) is provided with an anode external pipeline and an internal flow channel connection plate (10), the side wall of the anode external pipeline and internal flow channel connection plate (10) is provided with an anode sealing plate (11), the side wall of the cathode sealing plate (1) is provided with multiple cathode pipelines (12) running horizontally through it, the side wall of the cathode sealing plate (1) is provided with multiple anode pipelines (13) running vertically through it, the side wall of the anode sealing plate (11) is threaded with multiple bolts (14), and one end of the outer circumference of each of the multiple bolts (14) is threaded with a nut (15).
2. The high-efficiency electrocatalytic redox stack structure according to claim 1, characterized in that, The cathode sealing plate (1) has multiple cathode inlets (16) opened laterally on the top of its sidewall, and multiple anode inlets (17) opened longitudinally on one side of its sidewall. The anode sealing plate (11) has multiple cathode outlets (18) opened laterally on the bottom of its top sidewall, and multiple anode outlets (19) opened longitudinally on one side of its top sidewall. Both ends of the outer circumference of the cathode pipe (12) and the anode pipe (13) are provided with connectors (20).
3. The high-efficiency electrocatalytic redox stack structure according to claim 2, characterized in that, The isolation membrane assembly (6) includes a sealing membrane (601), an anion exchange membrane (602) is provided on one side of the inner cavity sidewall of the sealing membrane (601), a diaphragm (603) is provided on the sidewall of the anion exchange membrane (602), and a cation exchange membrane (604) is provided on the sidewall of the diaphragm (603).
4. The high-efficiency electrocatalytic redox stack structure according to claim 3, characterized in that, The bolts (14) and nuts (15) are made of 304 stainless steel, and the connector (20) is made of PTFE.
5. The high-efficiency electrocatalytic redox stack structure according to claim 4, characterized in that, The cathode sealing plate (1) and the anode sealing plate (11) are both made of glass fiber, and the dispersion plate (4) is made of CPVC.
6. The high-efficiency electrocatalytic redox stack structure according to claim 5, characterized in that, Both the cathode power conductive plate (3) and the anode power conductive plate (9) are made of copper. Both the cathode power conductive plate (3) and the anode power conductive plate (9) are provided with ear plates on their tops, and through holes are opened on the side walls of the ear plates.
7. The high-efficiency electrocatalytic redox stack structure according to claim 6, characterized in that, The cathode external pipeline and internal flow channel connecting plate (2) and the anode external pipeline and internal flow channel connecting plate (10) are both made of titanium, and the sealing film (601) is made of silicone rubber.