Flow type electrolysis device for enhancing mass transfer of carbon dioxide and application of flow type electrolysis device

Abstract

The invention relates to a flowing type electrolysis device for enhancing carbon dioxide mass transfer and application thereof, and the flowing type electrolysis device comprises a clamping assembly which comprises a first clamping plate and a second clamping plate; the polar plate assembly comprises a cathode plate and an anode plate, the cathode plate is connected with the first clamping plate, the anode plate is connected with the second clamping plate, the cathode plate is provided with a cathode medium outlet and a cathode medium inlet, and the anode plate is provided with an anode medium outlet and an anode medium inlet; the bipolar plate is positioned between the cathode plate and the anode plate; wherein the diameter of the outlet of the bipolar plate is smaller than that of the inlet of the bipolar plate. According to the invention, the problems of difficult water management and poor stability caused by salt deposition in a traditional membrane reactor are solved by utilizing the flow characteristic of the electrolyte, and finally carbon dioxide electrocatalytic reduction with high current density and stability is realized. And the mass transfer process of carbon dioxide is enhanced.

Description

Technical Field

[0001] The invention relates to the technical field of chemical reaction devices, and in particular to a flow-type electrolysis device for enhancing carbon dioxide mass transfer and application thereof. Background Art

[0002] Converting carbon dioxide into high value-added products through renewable electricity is an effective means to achieve the strategic goal of "carbon peak and carbon neutrality". Realizing the industrial application of electrocatalytic carbon dioxide reduction is the future development trend in this field. Efficient reaction devices are the key to promoting the industrial application of electrocatalytic carbon dioxide reduction. However, the current carbon dioxide reduction reaction devices still need to overcome the problems of low current density and poor stability.

[0003] Performance can be improved by optimizing the reactor structure: Patent application CN217298035U proposes an H-type electrolysis device for electrocatalytic carbon dioxide reduction, which is limited by the low solubility of carbon dioxide in the electrolyte, and the current density is usually less than 50mA cm-2. Patent application CN112522732A proposes a flow channel membrane reactor that converts the material into humid carbon dioxide gas to solve the problem of poor carbon dioxide mass transfer.

[0004] However, the above method has difficulties in water management and easily leads to salt deposition on the electrode surface, which makes the reaction device unstable and cannot meet industrial applications. Summary of the invention

[0005] The main purpose of the present invention is to overcome the defects of the existing flow-type electrolysis device for enhancing the mass transfer of carbon dioxide and to provide a new flow-type electrolysis device for enhancing the mass transfer of carbon dioxide. The technical problem to be solved is to at least solve the technical problems that the related technology has difficulties in water management and easily causes salt deposition on the electrode surface, resulting in poor stability of the reaction device and inability to meet industrial applications, so that it is more suitable for practical use and has industrial utilization value.

[0006] The purpose of the present invention and the technical problem to be solved are achieved by adopting the following technical solutions.

[0007] Compared with the prior art, the present invention has obvious advantages and beneficial effects. From the above technical scheme, it can be seen that in order to achieve the above-mentioned invention purpose, the main technical contents of the present invention are as follows:

[0008] The present invention provides a flow-type electrolysis device for enhancing carbon dioxide mass transfer, comprising:

[0009] A clamping assembly including a first clamping plate and a second clamping plate, wherein the first clamping plate and the second clamping plate are clamped together;

[0010] At least one set of plate assemblies, the plate assemblies comprising a cathode plate and an anode plate, the cathode plate being connected to the first clamping plate, the anode plate being connected to the second clamping plate, the cathode plate having a cathode medium outlet and a cathode medium inlet, the anode plate having an anode medium outlet and an anode medium inlet; a bipolar plate located between the cathode plate and the anode plate; wherein the diameter of the bipolar plate outlet is smaller than the diameter of the bipolar plate inlet.

[0011] In an optional embodiment, the ratio of the outlet diameter to the inlet diameter of the bipolar plate is 0.2-5.

[0012] In an optional embodiment, inner walls of the first clamping plate and the second clamping plate are provided with grooves, the cathode plate is located in the groove of the first clamping plate, and the anode plate is located in the groove of the second clamping plate.

[0013] In an optional embodiment, a side of the bipolar plate opposite to the cathode plate and a side of the bipolar plate opposite to the anode plate both have a serpentine flow field;

[0014] The serpentine flow field is in communication with an inlet and an outlet of the bipolar plate.

[0015] In an optional embodiment, a gasket is further included; the first clamping plate and the second clamping plate are provided with water stop grooves, and the gasket is located in the water stop grooves of the first clamping plate and the second clamping plate.

[0016] In an optional embodiment, the diameter of the water stop ring is 0.5mm-5mm.

[0017] In an optional embodiment, the gasket material is one of silicone, fluororubber, and polytetrafluoroethylene.

[0018] In an optional embodiment, the clamping assembly also includes connecting bolts; bolt holes are opened on the outer edges of the first clamping plate and the second clamping plate, and the first clamping plate and the second clamping plate clamp the plate assembly and the bipolar plate in the middle through the connecting bolts.

[0019] In an optional embodiment, the mixed phase solution introduced into the flow-type electrolysis device includes an electrolyte in which carbon dioxide gas is dissolved, wherein the electrolyte of the electrolyte is one or more of potassium carbonate, potassium sulfate, and potassium chloride.

[0020] In an optional embodiment, the bipolar plate material includes one of 304 stainless steel, 316 stainless steel, titanium plate, and iron plate.

[0021] On the other hand, an application of a flow-type electrolysis device for enhancing carbon dioxide mass transfer is also provided, and the application includes applying the flow-type electrolysis device for enhancing carbon dioxide mass transfer described in any of the above embodiments to electrocatalytic carbon dioxide reduction and gas-liquid flow electrochemical conversion.

[0022] By means of the above technical solution, the flow-type electrolysis device for enhancing carbon dioxide mass transfer of the present invention has at least the following advantages:

[0023] The electrolysis device provided by the embodiment of the present invention uses an electrolyte mixed with carbon dioxide gas as a reaction material. The electrolysis device provided by the embodiment of the present invention realizes the pressurized dissolution and reduced pressure precipitation of carbon dioxide in the electrolysis device. At the same time, the collision of the electrolyte in the flow field is used to realize the shearing effect on the carbon dioxide bubbles, overcome the problem of carbon dioxide mass transfer limitation, and improve the current density; the flow characteristics of the electrolyte are used to solve the water management difficulties and poor stability caused by salt deposition in the traditional membrane reactor, and finally realize the electrocatalytic reduction of carbon dioxide with high current density and stability. The mixed phase of the electrolyte and carbon dioxide of the present invention enters the electrolysis device through the inlet of the bipolar plate to react and flows out from the outlet of the bipolar plate. Due to the size difference between the inlet and outlet of the bipolar plate, the pressure of carbon dioxide at the inlet can be relatively large, and the solubility is improved. After entering the reactor, since the outlet diameter is smaller than the inlet, the gas pressure drops, and carbon dioxide bubbles are precipitated, thereby enhancing the mass transfer process of carbon dioxide.

[0024] In summary, the special flow-type electrolysis device for enhancing carbon dioxide mass transfer of the present invention can solve the technical problems that the related technologies have difficulties in water management and are prone to salt deposition on the electrode surface, resulting in poor stability of the reaction device and inability to meet industrial application requirements. It has the above-mentioned advantages and practical value, and no similar design has been publicly published or used in similar flow-type electrolysis devices for enhancing carbon dioxide mass transfer, so it is indeed innovative. It has great improvements in both the flow-type electrolysis device for enhancing carbon dioxide mass transfer and the function, and has great technical progress, and has produced easy-to-use and practical effects. It has multiple improved functions compared to the existing flow-type electrolysis device for enhancing carbon dioxide mass transfer, and is therefore more suitable for practical use and has wide industrial utilization value. It is truly a novel, progressive and practical new design.

[0025] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings.

[0026] The specific flow-type electrolysis device for enhancing carbon dioxide mass transfer of the present invention is described in detail by the following examples and accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic structural diagram of a flow-type electrolysis device for enhancing carbon dioxide mass transfer provided in an embodiment of the present invention.

[0028] Figure 2 A schematic structural diagram of the clamping plates (first clamping plate, second clamping plate) provided in an embodiment of the present invention.

[0029] Figure 3 A schematic diagram of the cathode plate and anode plate structure provided in an embodiment of the present invention.

[0030] Figure 4 A schematic structural diagram of a bipolar plate provided in an embodiment of the present invention.

[0031] Reference numerals:

[0032] 1-first clamping plate, 2-second clamping plate, 3-anode plate, 4-cathode plate, 5-bipolar plate, 6-water stop groove, 7-terminal post, 8-serpentine flow field. DETAILED DESCRIPTION

[0033] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the specific implementation method of the flow-type electrolysis device for enhancing carbon dioxide mass transfer proposed by the present invention is described in detail below in combination with the accompanying drawings and preferred embodiments.

[0034] See also Figure 1 As shown, the flow-type electrolysis device for enhancing carbon dioxide mass transfer in a preferred embodiment of the present invention comprises: a clamping assembly, at least one set of plate assemblies and a bipolar plate 5. The clamping assembly comprises a first clamping plate 1 and a second clamping plate 2, the first clamping plate 1 and the second clamping plate 2; the plate assembly comprises a cathode plate 4 and an anode plate 3, the cathode plate 4 is connected to the first clamping plate 1, the anode plate 3 is connected to the second clamping plate 2, the cathode plate 4 has a cathode medium outlet and a cathode medium inlet, the anode plate 3 has an anode medium outlet and an anode medium inlet; the bipolar plate 5 is located between the cathode plate 4 and the anode plate 3; the diameter of the outlet of the bipolar plate 5 is smaller than the diameter of the inlet of the bipolar plate 5.

[0035] The electrolysis device provided by the embodiment of the present invention has at least the following beneficial effects:

[0036] The electrolysis device provided by the embodiment of the present invention uses the electrolyte mixed with carbon dioxide gas as the reaction material, and realizes the pressurized dissolution and reduced pressure precipitation of carbon dioxide in the electrolysis device through the electrolysis device provided by the embodiment of the present invention. At the same time, the collision of the electrolyte in the flow field is used to realize the shearing effect on the carbon dioxide bubbles, overcome the problem of carbon dioxide mass transfer limitation, and improve the current density; the flow characteristics of the electrolyte are used to solve the water management difficulties and poor stability caused by salt deposition in the traditional membrane reactor, and finally realize the electrocatalytic reduction of carbon dioxide with high current density and stability. The mixed phase of the electrolyte and carbon dioxide of the present invention enters the electrolysis device through the inlet of the bipolar plate 5 to react, and flows out from the outlet of the bipolar plate 5. Due to the size difference between the inlet and outlet of the bipolar plate 5, the pressure of carbon dioxide at the inlet can be relatively large, and the solubility is improved. After entering the reactor, since the outlet diameter is smaller than the inlet, the gas pressure drops, and carbon dioxide bubbles are precipitated, thereby enhancing the mass transfer process of carbon dioxide.

[0037] The flow-type electrolysis device for enhancing carbon dioxide mass transfer provided by the embodiments of the present invention will be further explained and described below through optional embodiments.

[0038] It should be noted that the electrode plate assembly and the bipolar plate 5 provided by the present invention form a reaction unit. The embodiment of the present invention provides at least one reaction unit, that is, multiple reaction units can be set according to actual needs. The embodiment of the present invention is not limited to this number of reaction units.

[0039] The anode plate 3 of the present invention is provided with an inlet and an outlet, and the inlet and outlet on the anode plate 3 correspond to the inlet and outlet on the bipolar plate 5. Moreover, the inlet and outlet on the anode plate 3 are inconsistent, and further, the diameter of the inlet on the anode plate 3 is larger than the diameter of the outlet. The anode plate 3 is provided with a terminal 7 that can be used to intervene in the cathode power supply and the anode power supply, which can meet the current range of <2000A. The anode plate 3 is provided with positioning grooves around it to facilitate the positioning of the electrode, diaphragm, and sealing gasket. The anode plate 3 is provided with a water stop groove 6, the diameter of the water stop groove 6 is 0.5-5mm, preferably 1mm, and the material of the anode plate 3 is a metal material, including one of 304 stainless steel, 316 stainless steel, titanium plate, and iron plate. One side of the anode plate 3 has a serpentine flow field 8, and the serpentine flow field 8 is connected to the inlet and outlet of the anode plate 3.

[0040] The cathode plate 4 of the present invention is provided with an inlet and an outlet, and the inlet and outlet on the cathode plate 4 correspond to the inlet and outlet on the bipolar plate 5. The inlet and outlet on the cathode plate 4 are inconsistent, and further, the diameter of the inlet on the cathode plate 4 is larger than the diameter of the outlet. The cathode plate 4 is provided with a terminal 7 that can be used to insert the cathode power supply and the anode power supply, which can meet the current range of <2000A. The cathode plate 4 is provided with positioning grooves around it to facilitate the positioning of electrodes, diaphragms, and sealing gaskets. The cathode plate 4 is provided with a water stop groove 6, the diameter of the water stop groove 6 is 0.5-5mm, preferably 1mm, and the material of the cathode plate 4 is metal material, including one of 304 stainless steel, 316 stainless steel, titanium plate, and iron plate.

[0041] In an optional embodiment, the side of the bipolar plate 5 opposite to the cathode plate 4 has a serpentine flow field 8, and the side of the bipolar plate 5 opposite to the anode plate 3 has a serpentine flow field 8; the serpentine flow field 8 and the serpentine flow field 8 are connected to the inlet and outlet of the bipolar plate 5. In addition, one side of the cathode plate 4 provided in the embodiment of the present invention is also provided with a serpentine flow field 8, and the serpentine flow field 8 is connected to the inlet and outlet of the anode plate 3.

[0042] The two sides of the bipolar plate 5 of the present invention (one side is opposite to the anode plate 3, and the other side is opposite to the cathode plate 4) have a serpentine flow field 8 and inlets and outlets of different sizes; wherein the ratio of the outlet diameter to the inlet diameter of the anode plate 3 is 0.2-5; illustratively, the ratio of the outlet diameter to the inlet diameter of the anode plate 3 can be 0.2, 0.3, 0.5, 0.6, 0.7, 0.9, 1, 1.2, 1.4, 1.6, 1.9, 2, 2.2, 2.5, 2.7, 2.9, 3, 3.2, 3.5, 4.2, 4.5, 4.8, 4.9, 5. The material of the bipolar plate 5 is a metal material, and the material of the bipolar plate 5 can include one of 304 stainless steel, 316 stainless steel, titanium plate, and iron plate, preferably high purity titanium.

[0043] In an optional embodiment, the embodiment of the present invention uses sealing gaskets and sealing rings to seal between the clamping assembly, the electrode plate assembly and the bipolar plate 5. The sealing gasket and the sealing ring are made of one of silicone, fluororubber, and PTFE, preferably fluororubber.

[0044] In the embodiment of the present invention, the cathode plate, the anode plate, and the bipolar plate 5 include a minimum reaction unit consisting of a cathode electrode, an anode electrode, and a diaphragm. In other words, the minimum reaction unit of the present invention includes a cathode electrode, an anode electrode, and a diaphragm. The cathode electrode is one or more of carbon felt, carbon cloth, carbon paper, stainless steel mesh, silver mesh (foam), and copper mesh (foam) coated with a carbon dioxide reduction catalyst; the anode electrode is one or more of a two-phase or multi-phase oxide solid solution coated or grown with Ir, Ru, Co, Ni, Ti, Ta, Mn, and Fe; the diaphragm is selected from a cation exchange membrane, an anion exchange membrane, an alkaline PPS diaphragm, an asbestos mesh, and a bipolar membrane, preferably a cation exchange membrane.

[0045] Among them, the minimum reaction unit is one or more of the combinations of the above-mentioned cathode electrode, anode electrode, and diaphragm; they are superimposed according to production needs and reacted in series; the reaction medium introduced is an electrolyte containing carbon dioxide gas, and the electrolyte composition is one or more of potassium bicarbonate, potassium chloride, potassium bromide, potassium iodide, potassium carbonate, sodium bicarbonate, and potassium bicarbonate, and the electrolyte concentration is 0.1M-3M; illustratively, it can be 0.1M, 0.3M, 0.4M, 0.7M, 0.9M, 2M, 2.1M, 2.4M, 2.6M, 2.8M, 3M, etc. The reaction medium is introduced into the electrolysis device in the form of gas-liquid two-phase, gas phase, and liquid phase.

[0046] In an optional embodiment, the inner walls of the first clamping plate 1 and the second clamping plate 2 are provided with a groove, the cathode plate 4 is located in the groove of the first clamping plate 1, and the anode plate 3 is located in the groove of the second clamping plate 2. In an optional embodiment, a gasket is also included; a water stop groove 6 is provided on the first clamping plate 1 and the second clamping plate 2, and the gasket is located in the water stop groove 6 of the first clamping plate 1 and the second clamping plate 2. In an optional embodiment, the diameter of the water stop ring is 0.5mm-5mm. In an optional embodiment, the gasket material is one of silicone, fluorine rubber, and polytetrafluoroethylene.

[0047] In an optional embodiment, the clamping assembly also includes connecting bolts; bolt holes are opened on the outer edges of the first clamping plate 1 and the second clamping plate 2, and the first clamping plate 1 and the second clamping plate 2 clamp the plate assembly and the bipolar plate 5 in the middle through the connecting bolts.

[0048] The electrolysis device provided by the present invention will be further explained and described below through optional embodiments.

[0049] Example 1

[0050] Please refer to Figure 1 As shown, this embodiment provides a flow-type electrolysis device for enhancing carbon dioxide mass transfer, which can be assembled in multiple layers according to the minimum reaction unit according to the use requirements and used in series.

[0051] like Figure 1 As shown, the clamping plates at both ends (the first clamping plate 1 and the second clamping plate 2) are tightened by bolts, and the pressure at both ends ensures that there is sufficient pressure and sealing between the cathode plate 4, the anode plate 3, and the bipolar plate 5 in the middle. Figure 2 As shown, the groove in the clamping plate is used to fix the cathode and anode plates 3, and the positioning holes in the clamping plates (the first clamping plate 1 and the second clamping plate 2) are used to facilitate multi-layer assembly. The electrolyte inlet and product outlet in the clamping plates (the first clamping plate 1 and the second clamping plate 2) correspond to the inlet and outlet in the cathode plate 4, the anode plate 3, and the bipolar plate 5, ensuring that the reaction medium (electrolyte and gas) is evenly distributed between each plate (cathode plate 4, anode plate 3 and bipolar plate 5). The mixed phase (reaction medium) of the electrolyte and carbon dioxide is passed into the electrolysis device through the inlet on the bipolar plate 5, reacts through the smallest reaction unit, and flows out from the outlet on the bipolar plate 5. The diameter of the inlet on the bipolar plate 5 is 8mm, and the diameter of the outlet on the bipolar plate 5 is 16mm. The difference in inlet and outlet sizes can make the carbon dioxide pressure at the inlet higher and improve the solubility. After entering the electrolysis device, since the outlet diameter is smaller than the inlet, the gas pressure drops, and carbon dioxide bubbles are precipitated, thereby enhancing the mass transfer process of carbon dioxide.

[0052] Those skilled in the art can Figure 2 , Figure 3 and Figure 4 The structural units can be combined in various ways to form a fuel cell stack containing any number of single-tank reactors.

[0053] The cathode and anode inlets are fed with a potassium bicarbonate solution with a concentration of 0.5 mol / L and a flow rate of 2 L / min and a carbon dioxide gas with a gas flow rate of 0.5 L / min. A DC power supply is used, connected to the terminal 7, and a voltage is applied to react. The cathode electrode is a 100-mesh silver mesh, the anode electrode is an Ir-plated titanium mesh, and an alkaline pps film is used as a diaphragm. The data in Table 1 show that the optimization of current efficiency is achieved by adjusting the total voltage of the electrolytic cell and the potential of each electrode.

[0054] Table 1 Optimization data of current efficiency achieved by adjusting the total voltage of the electrolytic cell and the partial potential of each electrode

[0055]

[0056] When the applied potential was 3.7 V, the carbon monoxide selectivity was as high as 90% and the carbon dioxide conversion rate was 30%.

[0057] Example 2

[0058] The structure and catalyst of Example 2 are the same as those of Example 1, except that the inlet and outlet of the bipolar plate 5 of the electrolysis device have the same size of 16 mm. The data in Table 2 show that the optimization of current efficiency is achieved by adjusting the total voltage of the electrolytic cell and the partial potential of each electrode.

[0059] Table 2 Optimization data of current efficiency achieved by adjusting the total voltage of the electrolytic cell and the potential of each electrode

[0060]

[0061] The data in Table 2 show that when the inlet and outlet sizes on the bipolar plate 5 of the electrolysis device are kept consistent, the current density is 110 mA cm at 4.6 V. -2 The carbon monoxide selectivity is 36%, which is much lower than the selectivity of 90% in Example 1.

[0062] Example 3

[0063] The structure and catalyst of Example 3 are the same as those of Example 1, except that 1 M potassium sulfate is used. The data in Table 3 show that the optimization of current efficiency is achieved by adjusting the total voltage of the electrolytic cell and the partial potential of each electrode.

[0064] Table 3 Optimization data of current efficiency achieved by adjusting the total voltage of the electrolytic cell and the potential of each electrode

[0065] The data shown in Table 3 show that when 1 M potassium sulfate is used, the current density is 99 mA cm at 4.5 V. -2 The carbon monoxide selectivity is 22%, which is much lower than the selectivity of 90% in Example 1.

[0066] Example 4

[0067] The structure and electrolyte of Example 4 are the same as those of Example 1, except that the cathode electrode uses carbon felt coated with silver particles.

[0068] The data in Table 4 show the optimization data of current efficiency achieved by adjusting the total voltage of the electrolytic cell and the partial potential of each electrode.

[0069] The data in Table 4 show that when the reactor inlet and outlet dimensions are kept the same, the current density is 102 mA cm at 4.6 V. -2 The carbon monoxide selectivity is 46%, which is much lower than the selectivity of 90% in Example 1.

[0070] Example 5

[0071] The electrodes and electrolyte described in Example 5 are the same as those in Example 1, except that the ratio of the inlet diameter to the outlet diameter of the electrolytic cell is changed from 1:2 to 1:3.

[0072] The data in Table 5 show the optimization data of current efficiency achieved by adjusting the total voltage of the electrolytic cell and the partial potential of each electrode.

[0073]

[0074] The data shown in Table 5 show that when the ratio of the reactor inlet and outlet size is 1:3, the current density is 89 mA cm at 4.8 V. -2 The carbon monoxide selectivity is 61%, which is much lower than the selectivity of 90% in Example 1.

[0075] Example 6

[0076] The electrolyte inlet and outlet dimensions, electrodes and electrolyte described in Example 6 are the same as those in Example 1, except that 316 stainless steel is used.

[0077] The data in Table 6 show that the current efficiency can be optimized by adjusting the total voltage of the electrolytic cell and the partial potential of each electrode.

[0078]

[0079]

[0080] The data shown in Table 6 show that when the bipolar plate 5 is made of 316 stainless steel, the current density is 127 mA cm at 4.5 V. -2 The carbon monoxide selectivity is 62%, which is much lower than the selectivity of 90% in Example 1.

[0081] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the methods and technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A flow-type electrolysis device for enhancing carbon dioxide mass transfer, characterized in that: include: A clamping assembly including a first clamping plate and a second clamping plate, wherein the first clamping plate and the second clamping plate are clamped together; At least one set of plate assemblies, the plate assemblies comprising a cathode plate and an anode plate, the cathode plate being connected to the first clamping plate, the anode plate being connected to the second clamping plate, the cathode plate having a cathode medium outlet and a cathode medium inlet, the anode plate having an anode medium outlet and an anode medium inlet; a bipolar plate, located between the cathode plate and the anode plate; Wherein, the diameter of the outlet of the bipolar plate is smaller than the diameter of the inlet of the bipolar plate.

2. The flow-type electrolysis device for enhancing carbon dioxide mass transfer according to claim 1, characterized in that: The ratio of the outlet diameter to the inlet diameter of the bipolar plate is 0.2-5.

3. The flow-type electrolysis device for enhancing carbon dioxide mass transfer according to claim 1, characterized in that: The inner walls of the first clamping plate and the second clamping plate are provided with grooves, the cathode plate is located in the groove of the first clamping plate, and the anode plate is located in the groove of the second clamping plate.

4. The flow-type electrolysis device for enhancing carbon dioxide mass transfer according to claim 1, characterized in that: A side of the bipolar plate opposite to the cathode plate and a side of the bipolar plate opposite to the anode plate both have a serpentine flow field; The serpentine flow field is in communication with an inlet and an outlet of the bipolar plate.

5. The flow-type electrolysis device for enhancing carbon dioxide mass transfer according to claim 1, characterized in that: Also includes spacers; The first clamping plate and the second clamping plate are provided with water-stopping grooves, and the gasket is located in the water-stopping grooves of the first clamping plate and the second clamping plate.

6. The flow-type electrolysis device for enhancing carbon dioxide mass transfer according to claim 5, characterized in that: The diameter of the water stop ring is 0.5mm-5mm.

7. The flow-type electrolysis device for enhancing carbon dioxide mass transfer according to claim 5, characterized in that: The gasket material is one of silica gel, fluorine rubber and polytetrafluoroethylene.

8. The flow-type electrolysis device for enhancing carbon dioxide mass transfer according to claim 1, characterized in that: The clamping assembly also includes a connecting bolt; Bolt holes are provided on the outer edges of the first clamping plate and the second clamping plate, and the first clamping plate and the second clamping plate clamp the polar plate assembly and the bipolar plate in the middle through the connecting bolts.

9. The flow-type electrolysis device for enhancing carbon dioxide mass transfer according to claim 1, characterized in that: The mixed phase solution introduced into the flow-type electrolysis device includes an electrolyte in which carbon dioxide gas is dissolved, wherein the electrolyte of the electrolyte is one or more of potassium carbonate, potassium sulfate, and potassium chloride.

10. The flow-type electrolysis device for enhancing carbon dioxide mass transfer according to claim 1, characterized in that: The bipolar plate material includes one of 304 stainless steel, 316 stainless steel, titanium plate, and iron plate.

11. Application of a flow-type electrolysis device for enhancing carbon dioxide mass transfer, characterized in that: The application includes applying the flow-type electrolysis device for enhancing carbon dioxide mass transfer as described in any one of claims 1 to 10 to electrocatalytic carbon dioxide reduction and gas-liquid flow electrochemical conversion.

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