Carbon dioxide electrolytic bath module, and electrolytic carbon dioxide reduction system and reduction method

Abstract

A carbon dioxide electrolytic bath module, and an electrolytic carbon dioxide reduction system and reduction method. The carbon dioxide electrolytic bath module comprises: a cell stack assembly, which is formed by means of stacking single cell stack groups and is used for electrolyzing a cathode reactant and an anode reactant and producing a cathode product, wherein each of the single cell stack group comprises an ion exchange membrane, which is provided with a plurality of membrane holes, an anode flow channel plate, which is provided with a first through hole and an anode flow channel, a cathode flow channel plate, which is provided with a second through hole corresponding to the first through hole and a cathode flow channel, an anode catalyst, a cathode catalyst, and a gas barrier gasket; a first end plate; a second end plate; a first insulating plate, which is provided with a first insulating-plate through hole corresponding to a first inlet and a first outlet of the first end plate, and a first collector plate groove; a second insulating plate, which is provided with a second insulating-plate through hole corresponding to a second inlet and a second outlet of the second end plate, and a second collector plate groove; and two collector plates. Thus, a relatively small amount of energy is required during the electrolysis of carbon dioxide, thereby achieving an energy-saving effect.

Description

Carbon dioxide electrolyzer module, electrolytic carbon dioxide reduction system and reduction method Technical Field

[0001] The present invention relates to the technical field of generating hydrocarbons, and more particularly to a carbon dioxide electrolysis cell module, an electrolytic carbon dioxide reduction system, and a reduction method for generating hydrocarbons by electrolysis. Background Art

[0002] Currently, about 80% of the world's energy needs are met through the combustion of fossil fuels. This combustion process causes the world to emit about 34 billion tons of carbon dioxide into the atmosphere each year. Most of this carbon dioxide is emitted directly into the atmosphere. Carbon dioxide is a greenhouse gas that has adverse effects on both the atmosphere and the climate, thereby causing global warming and ocean acidification.

[0003] In terms of carbon dioxide reuse, the industry is currently focusing on converting carbon dioxide into other energy sources. Taking the reduction of carbon dioxide to form carbon monoxide or other hydrocarbons as an example, carbon dioxide is mostly reduced by electrocatalysis. However, this method faces problems such as carbon dioxide diffusion capacity, conversion rate, product separation and purification, and the disadvantage of complicated steps.

[0004] Summary of the Invention

[0005] The present invention provides a carbon dioxide electrolyzer module, an electrolytic carbon dioxide reduction system and a reduction method, the purpose of which is to use the carbon dioxide electrolyzer module with a new structure to perform electrolysis reaction.

[0006] A carbon dioxide electrolyzer module of the present invention comprises: a stack assembly formed by stacking at least two single stacks, for electrolyzing a cathode reactant and an anode reactant, and producing a cathode product, wherein the single stack further comprises: an ion exchange membrane having a plurality of membrane pores and having a first surface and a second surface arranged opposite to each other; an anode flow channel plate, which is arranged on the first surface side of the ion exchange membrane, the anode flow channel plate having at least four first through holes and an anode flow channel; a cathode flow channel plate, which is arranged on the second surface side of the ion exchange membrane, the The cathode flow channel plate has at least four second through holes corresponding to the at least four first through holes and a cathode flow channel, wherein the anode flow channel plate and the cathode flow channel plate are combined in a manner that the anode flow channel and the cathode flow channel are arranged facing each other; an anode catalyst is arranged in a first accommodating space between the ion exchange membrane and the anode flow channel plate, and a first gap exists in the first accommodating space to enable the anode reactant to flow; a cathode catalyst is arranged in a second accommodating space between the ion exchange membrane and the cathode flow channel plate, and a first gap exists in the second accommodating space to enable the cathode reactant to flow a second gap; and at least two gas barrier gaskets, which are respectively arranged between the anode flow channel plate and the ion exchange membrane, and between the cathode flow channel plate and the ion exchange membrane, and have at least two third through holes corresponding to the at least four first through holes, for forming a connecting channel, so that the cathode reactant and the anode reactant contact the anode catalyst and the cathode catalyst respectively through the connecting channel; a first end plate, which is arranged on one side of the stack assembly and has a first inlet and a first outlet; a second end plate, which is arranged on the other side of the stack assembly so that the stack assembly is clamped between the first and second end plates. Between an end plate and the second end plate, the second end plate has a second inlet and a second outlet; a first insulating plate, which is arranged between the first end plate and the battery stack assembly and has a first insulating plate through hole and a first collector plate groove corresponding to the first inlet and the first outlet; a second insulating plate, which is arranged between the second end plate and the battery stack assembly and has a second insulating plate through hole and a second collector plate groove corresponding to the second inlet and the second outlet; and two collector plates, respectively arranged in the first collector plate groove and the second collector plate groove, for contacting the battery stack assembly.

[0007] In one embodiment of the present invention, the above-mentioned first end plate has at least one first fixing hole, and the second end plate has at least one second fixing hole corresponding to the at least one first fixing hole, and the first end plate and the second end plate are fixed to each other through at least one first fixing component and at least one second fixing component through the at least one first fixing hole and the at least one second fixing hole, so that the first end plate, the second end plate and the stack assembly constitute the carbon dioxide electrolyzer module.

[0008] In one embodiment of the present invention, the above-mentioned fuel cell stack assembly further includes at least one limiting groove, which is used for a limiting rod to pass through for assisting in fixing the positions of the first end plate, the second end plate, the first insulating plate, the second insulating plate, the anode flow channel plate, and the cathode flow channel plate.

[0009] In one embodiment of the present invention, the ion exchange membrane is an alkaline exchange membrane (AEM), an acidic ion exchange membrane, or a bipolar membrane.

[0010] In one embodiment of the present invention, the anode flow channel plate further includes an anode flow channel surface, which is concavely disposed on the anode flow channel plate, and the anode flow channel is convexly disposed on the anode flow channel surface.

[0011] In one embodiment of the present invention, the cathode flow channel plate further includes a cathode flow channel surface, which is concavely disposed on the cathode flow channel plate, and the cathode flow channel is convexly disposed on the cathode flow channel surface.

[0012] In one embodiment of the present invention, the anode flow channel and the cathode flow channel include but are not limited to column flow channels, serpentine flow channels or interdigitated flow channels.

[0013] In one embodiment of the present invention, the anode catalyst is a gas diffusion electrode (GDE) and includes an anode catalyst layer and an anode gas diffusion layer, and the anode catalyst layer contacts the first surface of the ion exchange membrane, and the anode gas diffusion layer contacts the anode flow channel of the anode flow channel plate.

[0014] In one embodiment of the present invention, the anode catalyst is made of, but not limited to, iridium (Ir), nickel (Ni), platinum (Pt), iron (Fe), or oxides of the above metals, or a combination thereof.

[0015] In one embodiment of the present invention, the cathode catalyst is a gas diffusion electrode (GDE) and includes a cathode catalyst layer and a cathode gas diffusion layer, and the cathode catalyst layer contacts the second surface of the ion exchange membrane, and the cathode gas diffusion layer contacts the cathode flow channel of the cathode flow channel plate.

[0016] In one embodiment of the present invention, the cathode catalyst is made of, but not limited to, copper (Cu), iron (Fe), silver (Ag), cobalt (Co), nickel (Ni), iridium (Ir), platinum (Pt), gold (Au), titanium (Ti), ruthenium (Ru), rhodium (Rh), or carbides, oxides, carbonitrides, or combinations thereof.

[0017] In one embodiment of the present invention, the at least two air-blocking gaskets mentioned above both have a thickness for controlling the heights of the first accommodating space and the second accommodating space and adjusting a compression ratio of the first gap and the second gap.

[0018] In one embodiment of the present invention, the above-mentioned gas barrier gasket is but not limited to a gasket made of polypropylene (PP), polyamide (PA), acrylonitrile-butadiene-styrene (ABS), polyetherimide (PEI), polyphenylene sulfide (PPS), Teflon (PTFE) or polyetheretherketone matrix (PEEK matrix) material.

[0019] In one embodiment of the present invention, the carbon dioxide electrolyzer module further includes two sealing gaskets, respectively sealing between the anode flow channel plate and the gas barrier gasket, and between the cathode flow channel plate and the gas barrier gasket.

[0020] In one embodiment of the present invention, the first inlet and the first outlet in the first end plate and the second inlet and the second outlet in the second end plate are both provided with a detachable adapter, and the detachable adapter is but not limited to an adapter made of plastic, stainless steel or metal.

[0021] In one embodiment of the present invention, the first inlet and the first outlet in the first end plate are arranged in a diagonal mirror image with the second inlet and the second outlet in the second end plate.

[0022] The present invention also includes an electrolytic carbon dioxide reduction system, which includes a carbon dioxide electrolysis cell module as described in any of the above items, and further includes: a cathode reactant tank for storing a cathode reactant, wherein the cathode reactant includes CO2, H2O, H + or OH - a mass flow control unit connected to the cathode reactant tank for receiving the flow of the cathode reactant and obtaining a mass flow rate; a pure water tank for storing a pure water washing liquid for cleaning, for washing the carbon dioxide electrolyzer module; a first fluid multi-way valve having a first water inlet connected to the mass flow control unit, a second water inlet connected to the pure water tank, and a first water outlet connected to the carbon dioxide electrolyzer module; an electrolyte storage tank for storing an anode reactant, wherein the anode reactant includes 1A group ions, OH - 、CO3 2- , H2O or PO4 3-a compound and connected to the carbon dioxide electrolyzer module; an electrolyte circulation cooling module connected to the carbon dioxide electrolyzer module and the electrolyte storage tank for cooling the anode reactant after the reaction in the carbon dioxide electrolyzer module and injecting the anode reactant into the electrolyte storage tank; a second fluid multi-way valve having a third water inlet and connected to the carbon dioxide electrolyzer module, a second water outlet and a third water outlet for respectively conducting a cathode product generated after the reaction in the carbon dioxide electrolyzer module or a waste liquid flowing out after washing the carbon dioxide electrolyzer module; a product storage unit coupled to the second fluid multi-way valve for collecting the cathode product; and a control unit electrically connected to the mass flow control unit, the first fluid multi-way valve, the second fluid multi-way valve, and the electrolyte circulation cooling module for controlling the cathode reactant and the anode reactant to flow into the carbon dioxide electrolyzer module and produce the cathode product.

[0023] In one embodiment of the present invention, the first inlet in the first end plate is used for the cathode reactant or the pure water washing liquid to flow in, and the first outlet is used for the cathode product or the waste liquid to flow out.

[0024] In one embodiment of the present invention, the second inlet and the second outlet in the second end plate are used for respectively allowing the anode reactant to flow in and allowing the anode reactant heated after the electrolysis reaction to flow out.

[0025] The present invention further includes a reduction method suitable for an electrolytic carbon dioxide reduction system, comprising the following steps: allowing the cathode reactant to flow through the mass flow control unit through the cathode reactant tank and obtain the mass flow rate; allowing the cathode reactant to flow into the carbon dioxide electrolyzer module from the first water inlet of the first fluid multi-way valve through the control unit according to the mass flow rate; allowing the anode reactant to flow into the carbon dioxide electrolyzer module through the electrolyte storage tank; using the carbon dioxide electrolyzer module to electrolyze the cathode reactant and the anode reactant to form the cathode product; and then collecting the cathode product to the product storage unit through the second water outlet of the second fluid multi-way valve.

[0026] In one embodiment of the present invention, the above-mentioned reduction method further includes the following steps: when the carbon dioxide electrolyzer module needs to be cleaned, the pure water cleaning liquid is allowed to flow into the carbon dioxide electrolyzer module from the second water inlet of the first fluid multi-way valve through the pure water tank to clean the internal pipeline of the carbon dioxide electrolyzer module; and then the waste liquid is discharged through the third water outlet of the first fluid multi-way valve.

[0027] In one embodiment of the present invention, the above-mentioned reduction method further includes the following steps: when the carbon dioxide electrolysis cell module discharges the heated anode reactant after the electrolysis reaction, the anode reactant is cooled by the electrolyte circulation cooling module and the anode reactant is returned to the electrolyte storage tank.

[0028] The effect of the present invention is that the carbon dioxide electrolyzer module, electrolytic carbon dioxide reduction system and reduction method of the present invention use an anode flow channel plate and a cathode flow channel plate with an anode catalyst and a cathode catalyst as the anode electrode and the cathode electrode respectively, and use membrane electrode assembly (MEA) technology to effectively reduce the distance between the electrodes and reduce the resistance, thereby improving the stability of the electrodes and the high current density, so that the energy consumption required for the electrolysis of carbon dioxide is relatively small, and the electrolytic reduction of carbon dioxide with better reaction efficiency is achieved, thereby achieving the effect of saving energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] FIG1 is a schematic diagram of a carbon dioxide electrolyzer module of the present invention;

[0030] FIG2 is a schematic diagram of a single stack group in a carbon dioxide electrolyzer module of the present invention;

[0031] FIG3 is a functional block diagram of the electrolytic carbon dioxide reduction system of the present invention;

[0032] 4 is a schematic diagram of a stack of carbon dioxide electrolysis cell modules in the electrolytic carbon dioxide reduction system according to the first embodiment of the present invention;

[0033] 5 is a schematic diagram of a stack of carbon dioxide electrolysis cell modules in a carbon dioxide electrolysis reduction system according to a second embodiment of the present invention;

[0034] FIG6 is a flow chart showing the steps of a reduction method applicable to an electrolytic carbon dioxide reduction system according to the present invention.

[0035] Explanation of symbols in the accompanying drawings: 1 CO2 electrolyzer module; 11 Stack assembly; 110 Single stack group; 1101 Ion exchange membrane; 1102 Anode flow channel plate; 11021 First through hole; 1103 Cathode flow channel plate; 11031 Second through hole; 11032 Cathode flow channel; 1104 Anode catalyst; 1105 Cathode catalyst; 11051 Second accommodating space; 1106 Gas barrier gasket; 12 First end plate; 121 First inlet; 122 First outlet; 13 Second end plate; 131 Second inlet; 132 Second outlet; 14 First insulating plate; 141 First insulating plate through hole; 15 Second insulating plate; 151 Second insulating plate through hole; 152 Second collector plate slot; 16 Collector plate; 3 Electrolytic CO2 reduction system; 301 Cathode reactant tank; 302 mass flow control unit; 303 pure water tank; 304 first fluid multi-way valve; 305 electrolyte storage tank; 306 electrolyte circulation cooling module; 307 second fluid multi-way valve; 308 product storage unit; 309 control unit; step flow of S610 to S650. DETAILED DESCRIPTION

[0036] In order to make the above features and advantages of the present invention more obvious and easy to understand, the following embodiments are specifically cited, and are accompanied by the accompanying drawings. In addition to these detailed descriptions, the present invention can also be widely implemented in other embodiments. Any easy replacement, modification, and equivalent changes of the embodiments are included in the scope of the present invention and are subject to the scope of the patent application. In the description of the specification, many specific details are provided to enable readers to have a more complete understanding of the present invention; however, the present invention may still be implemented under the premise of omitting some or all of the specific details. In addition, well-known steps or components are not described in detail to avoid unnecessary limitations on the present invention. The same or similar components in the drawings will be represented by the same or similar symbols. It is particularly noted that the drawings are for illustration purposes only and do not represent the actual size or quantity of the components. Some details may not be fully drawn. In order to keep the drawings concise, a detailed description is given below.

[0037] Please refer to FIG. 1 , which is a schematic diagram of a carbon dioxide electrolyzer module of the present invention.The carbon dioxide electrolyzer module in the present invention includes: a stack assembly 11, which is formed by stacking at least two single stack groups 110 (only a single stack group 110 is shown in Figure 1), which is used to electrolyze a cathode reactant and an anode reactant and produce a cathode product, wherein the single stack group further includes: an ion exchange membrane 1101, having a plurality of membrane holes, and having a first surface and a second surface arranged relative to each other; an anode flow channel plate 1102, which is arranged on the first surface side of the ion exchange membrane 1101, and the anode flow channel plate 1102 has at least four first through holes 11021 and an anode flow channel (not shown); a cathode flow channel plate 1103, which is arranged on the second surface side of the ion exchange membrane 1101 , the cathode flow channel plate 1103 has at least four second through holes 11031 corresponding to the at least four first through holes 11021 and a cathode flow channel 11032, wherein the anode flow channel plate 1102 and the cathode flow channel plate 1103 are combined in a manner that the anode flow channel and the cathode flow channel 11032 are arranged facing each other; an anode catalyst 1104, which is arranged in a first accommodating space (not shown) between the ion exchange membrane 1101 and the anode flow channel plate 1102, and has a first gap that allows the anode reactant to flow; a cathode catalyst 1105, which is arranged in a second accommodating space 11051 between the ion exchange membrane 1101 and the cathode flow channel plate 1103, and has a first gap that allows the cathode reactant to flow a second gap for movement; and at least two gas blocking gaskets 1106, which are respectively arranged between the anode flow channel plate 1102 and the ion exchange membrane 1101, and between the cathode flow channel plate 1103 and the ion exchange membrane 1101, and have at least two third through holes corresponding to the at least four first through holes 11021, for forming a connecting channel, so that the cathode reactant and the anode reactant contact the anode catalyst 1104 and the cathode catalyst 1105 respectively through the connecting channel; a first end plate 12, which is arranged on one side of the stack assembly 11 and has a first inlet 121 and a first outlet 122; a second end plate 13, which is arranged on the other side of the stack assembly 11 so that the stack assembly 11 is clamped between the first end plate 12 and the cathode catalyst 1105; Between the plate 12 and the second end plate 13, the second end plate 13 has a second inlet 131 and a second outlet 132; a first insulating plate 14, which is arranged between the first end plate 12 and the battery stack assembly 11, and has a first insulating plate through hole 141 and a first collector plate groove (not shown) corresponding to the first inlet 121 and the first outlet 122; a second insulating plate 15, which is arranged between the second end plate 13 and the battery stack assembly 11, and has a second insulating plate through hole 151 and a second collector plate groove 152 corresponding to the second inlet 131 and the second outlet 132; and two collector plates 16, respectively arranged in the first collector plate groove and the second collector plate groove 152, for contacting the battery stack assembly 11.

[0038] In this embodiment, the first end plate 12 has at least one first fixing hole, and the second end plate 13 has at least one second fixing hole corresponding to the at least one first fixing hole, and the first end plate 12 and the second end plate 13 are fixed to each other through at least one first fixing component and at least one second fixing component through the at least one first fixing hole, so that the first end plate 12, the second end plate 13 and the stack assembly 11 constitute the carbon dioxide electrolyzer module 1.

[0039] In this embodiment, the stack assembly 11 further includes at least one retaining groove through which a retaining rod passes to assist in securing the first end plate, the second end plate, the first insulating plate, the second insulating plate, the anode flow channel plate, and the cathode flow channel plate. During operation, the retaining groove is located in the center of the two fixing holes. During assembly, the retaining rod is first inserted to secure the stack assembly. The retaining rod is then removed after the screws are tightened.

[0040] In this embodiment, the ion exchange membrane 1101 is an alkaline exchange membrane (AEM), an acidic ion exchange membrane, or a bipolar membrane.

[0041] In this embodiment, the anode flow channel plate 1102 further includes an anode flow channel surface, which is concavely disposed on the anode flow channel plate 1102 , and the anode flow channel is convexly disposed on the anode flow channel surface.

[0042] In this embodiment, the cathode flow channel plate 1103 further includes a cathode flow channel surface, which is concavely disposed on the cathode flow channel plate 1103 , and the cathode flow channel 11032 is convexly disposed on the cathode flow channel surface.

[0043] In this embodiment, the anode flow channel and the cathode flow channel 11032 include but are not limited to column flow channels, serpentine flow channels, or interdigitated flow channels.

[0044] In this embodiment, the anode catalyst 1104 is a gas diffusion electrode (GDE) and includes an anode catalyst layer and an anode gas diffusion layer, and the anode catalyst layer contacts the first surface of the ion exchange membrane 1101, and the anode gas diffusion layer contacts the anode flow channel of the anode flow channel plate 1102.

[0045] In this embodiment, the anode catalyst 1104 is made of, but not limited to, iridium (Ir), nickel (Ni), platinum (Pt), iron (Fe), or oxides of the above metals, or a combination thereof.

[0046] Preferably, the anode catalyst 1104 is made of nickel (Ni), nickel iron (NiFe) or iridium dioxide (IrO 2 ).

[0047] Optimally, the anode catalyst 1104 is made of iridium dioxide (IrO 2 ).

[0048] In this embodiment, the cathode catalyst 1105 is a gas diffusion electrode (GDE) and includes a cathode catalyst layer and a cathode gas diffusion layer, and the cathode catalyst layer contacts the second surface of the ion exchange membrane 1101, and the cathode gas diffusion layer contacts the cathode flow channel 11032 of the cathode flow channel plate 1103.

[0049] In this embodiment, the cathode catalyst 1105 is made of, but not limited to, copper (Cu), iron (Fe), silver (Ag), cobalt (Co), nickel (Ni), iridium (Ir), platinum (Pt), gold (Au), titanium (Ti), ruthenium (Ru), rhodium (Rh), or carbides, oxides, carbonitrides, or combinations thereof.

[0050] In this embodiment, the at least two air-blocking gaskets 1106 each have a specific thickness for controlling the height of the first accommodating space and the second accommodating space 11051 and adjusting a compression ratio of the first gap and the second gap.

[0051] In this embodiment, the air barrier gasket 1106 is a gasket made of, but not limited to, polypropylene (PP), polyamide (PA), acrylonitrile-butadiene-styrene (ABS), polyetherimide (PEI), polyphenylene sulfide (PPS), Teflon (PTFE) or polyetheretherketone matrix (PEEK matrix) material.

[0052] In this embodiment, two sealing gaskets are further included, which are respectively sealed between the anode flow channel plate 1102 and the gas blocking gasket 1106 , and between the cathode flow channel plate 1103 and the gas blocking gasket 1106 .

[0053] In this embodiment, the first inlet 121 and the first outlet 122 in the first end plate 12 and the second inlet 131 and the second outlet 132 in the second end plate 13 are all provided with a detachable adapter, which is but not limited to an adapter made of plastic, stainless steel or metal.

[0054] In this embodiment, the first inlet 121 and the first outlet 122 in the first end plate 12 are arranged in a diagonally mirrored manner to the second inlet 131 and the second outlet 132 in the second end plate 13 .

[0055] Please refer to Figure 2, which is a schematic diagram of a single stack group in the carbon dioxide electrolyzer module of the present invention. The single stack group 110 in Figure 2 is used to electrolyze a cathode reactant and an anode reactant and produce a cathode product, wherein the single stack group further includes: an ion exchange membrane 1101, having a plurality of membrane holes, and having a first surface and a second surface arranged opposite to each other; an anode flow channel plate 1102, which is arranged on the first surface side of the ion exchange membrane 1101, the anode flow channel plate 1102 has at least four first through holes 11021 and an anode flow channel; a cathode flow channel plate 1103, which is arranged on the second surface side of the ion exchange membrane 1101, the cathode flow channel plate 1103 has at least four second through holes 11031 corresponding to the at least four first through holes 11021 and a cathode flow channel 11032, wherein the anode flow channel plate 1102 and the cathode flow channel plate 1103 are based on the anode flow channel and the cathode flow channel. The cathode flow channels 11032 are arranged facing each other; an anode catalyst 1104 is arranged in a first accommodating space between the ion exchange membrane 1101 and the anode flow channel plate 1102, and there is a first gap that allows the anode reactant to flow; a cathode catalyst 1105 is arranged in a second accommodating space 11051 between the ion exchange membrane 1101 and the cathode flow channel plate 1103, and there is a second gap that allows the cathode reactant to flow; and at least two gas blocking gaskets 1106, which are respectively arranged between the anode flow channel plate 1102 and the ion exchange membrane 1101, and between the cathode flow channel plate 1103 and the ion exchange membrane 1101, and have at least two third through holes corresponding to the at least four first through holes 11021, for forming a connecting channel, so that the cathode reactant and the anode reactant contact the anode catalyst 1104 and the cathode catalyst 1105 respectively through the connecting channel.

[0056] In this embodiment, the ion exchange membrane 1101 is an alkaline exchange membrane (AEM), an acidic ion exchange membrane, or a bipolar membrane.

[0057] In this embodiment, a plurality of the single fuel cell stack groups 110 are stacked to form the fuel cell stack assembly 11 .

[0058] In this embodiment, the anode flow channel plate 1102 further includes an anode flow channel surface, which is concavely disposed on the anode flow channel plate 1102 , and the anode flow channel is convexly disposed on the anode flow channel surface.

[0059] In this embodiment, the cathode flow channel plate 1103 further includes a cathode flow channel surface, which is concavely disposed on the cathode flow channel plate 1103 , and the cathode flow channel 11032 is convexly disposed on the cathode flow channel surface.

[0060] In this embodiment, the anode flow channel and the cathode flow channel 11032 both include but are not limited to column flow channels, serpentine flow channels, or interdigitated flow channels.

[0061] In this embodiment, the anode catalyst 1104 is a gas diffusion electrode (GDE) and includes an anode catalyst layer and an anode gas diffusion layer, and the anode catalyst layer contacts the first surface of the ion exchange membrane 1101, and the anode gas diffusion layer contacts the anode flow channel of the anode flow channel plate 1102.

[0062] In this embodiment, the anode catalyst 1104 is made of, but not limited to, iridium (Ir), nickel (Ni), platinum (Pt), iron (Fe), or oxides of the above metals, or a combination thereof.

[0063] Preferably, the anode catalyst 1104 is made of nickel (Ni), nickel iron (NiFe) or iridium dioxide (IrO 2 ).

[0064] Optimally, the anode catalyst 1104 is made of iridium dioxide (IrO 2 ).

[0065] In this embodiment, the cathode catalyst 1105 is a gas diffusion electrode (GDE) and includes a cathode catalyst layer and a cathode gas diffusion layer, and the cathode catalyst layer contacts the second surface of the ion exchange membrane 1101, and the cathode gas diffusion layer contacts the cathode flow channel 11032 of the cathode flow channel plate 1103.

[0066] In this embodiment, the cathode catalyst 1105 is made of, but not limited to, copper (Cu), iron (Fe), silver (Ag), cobalt (Co), nickel (Ni), iridium (Ir), platinum (Pt), gold (Au), titanium (Ti), ruthenium (Ru), rhodium (Rh), or carbides, oxides, carbonitrides, or combinations thereof.

[0067] In this embodiment, the anode catalyst 1104 , the cathode catalyst 1105 , and the ion exchange membrane 1101 are combined to form a membrane electrode assembly (MEA).

[0068] In this embodiment, the at least two air-blocking gaskets 1106 each have a specific thickness for controlling the height of the first accommodating space and the second accommodating space 11051 and adjusting a compression ratio of the first gap and the second gap.

[0069] Preferably, the first accommodating space is composed of the gas barrier gasket 1106 with a thickness of 0.25 mm, the anion exchange membrane 1101 and the anode flow channel plate 1102, and the second accommodating space 11051 is composed of the gas barrier gasket 1106 with a thickness of 0.4 mm, the anion exchange membrane 1101 and the cathode flow channel plate 1103. Since HER (Hydrogen evolution reaction) and CO2RR (Carbon dioxide reduction reaction) are in a competing reaction relationship, reducing HER helps promote the occurrence of CO2RR.

[0070] Among them, the size of the first accommodating space and the second accommodating space 11051 will affect the diffusion capacity of carbon dioxide gas and the selectivity and yield of the final output product. When the total thickness of the gas barrier gasket 1106 (PTFE) is 0.65mm (0.4mm+0.25mm), the first accommodating space and the second accommodating space 11051 generated by the combination can achieve a better compression rate, which can enable the carbon dioxide electrolyzer module 1 to have the best carbon dioxide Faraday efficiency.

[0071] In this embodiment, the air barrier gasket 1106 is a gasket made of, but not limited to, polypropylene (PP), polyamide (PA), acrylonitrile-butadiene-styrene (ABS), polyetherimide (PEI), polyphenylene sulfide (PPS), Teflon (PTFE) or polyetheretherketone matrix (PEEK matrix) material.

[0072] In this embodiment, two sealing gaskets are further included, which are respectively sealed between the anode flow channel plate 1102 and the gas blocking gasket 1106 , and between the cathode flow channel plate 1103 and the gas blocking gasket 1106 .

[0073] Please refer to FIG3 , which is a functional block diagram of the electrolytic carbon dioxide reduction system of the present invention. The electrolytic carbon dioxide reduction system 3 of the present invention includes the aforementioned carbon dioxide electrolysis cell module 1; and a cathode reactant tank 301 for storing a cathode reactant, wherein the cathode reactant includes CO2, H2O, H + or OH -a mass flow control unit 302 connected to the cathode reactant tank 301 for receiving the flow of the cathode reactant and obtaining a mass flow rate; a pure water tank 303 for storing a pure water washing liquid for cleaning, for washing the carbon dioxide electrolysis cell module 1; a first fluid multi-way valve 304 having a first water inlet connected to the mass flow control unit 302, a second water inlet connected to the pure water tank 303, and a first water outlet connected to the carbon dioxide electrolysis cell module 1; an electrolyte storage tank 305 for storing an anode reactant, wherein the anode reactant includes 1A group ions, OH - 、CO3 2- , H2O or PO4 3- Compound, and connected to the carbon dioxide electrolysis cell module 1; an electrolyte circulation cooling module 306, connected to the carbon dioxide electrolysis cell module 1 and the electrolyte storage tank 305, for cooling the anode reactant after the reaction of the carbon dioxide electrolysis cell module 1 and injecting it into the electrolyte storage tank 305; a second fluid multi-way valve 307, having a third water inlet and connected to the carbon dioxide electrolysis cell module 1, a second water outlet and a third water outlet for respectively conducting the generated after the reaction of the carbon dioxide electrolysis cell module 1 A cathode product, or a waste liquid flowing out after washing the carbon dioxide electrolysis cell module 1; a product storage unit 308, coupled to the second fluid multi-way valve 307, for collecting the cathode product; and a control unit 309, electrically connected to the mass flow control unit 302, the first fluid multi-way valve 304, the second fluid multi-way valve 307, and the electrolyte circulation cooling module 306, for controlling the cathode reactant and the anode reactant to flow into the carbon dioxide electrolysis cell module 1 and produce the cathode product.

[0074] In this embodiment, the half-reaction of the cathode reactant at the cathode is: CO2+H2O+2e - →CO+2OH - .

[0075] Among them, the half reaction of the anode reactant at the anode is: 2OH - →H2O+1 / 2O2+2e - .

[0076] The product equation is: xCO2+(2x+yz)H2O+(4x+y-2z)e - →C2H y O z +(4x+y-2z)e - .

[0077] In this embodiment, the first end plate has at least one first fixing hole, the second end plate has at least one second fixing hole corresponding to the at least one first fixing hole, and the first end plate and the second end plate are fixed to each other through at least one first fixing component and at least one second fixing component through the at least one first fixing hole and the at least one second fixing hole, so that the first end plate, the second end plate and the stack assembly constitute the carbon dioxide electrolyzer module 1.

[0078] In this embodiment, the stack assembly further includes at least one retaining groove through which a retaining rod passes to assist in securing the first end plate, the second end plate, the first insulating plate, the second insulating plate, the anode flow channel plate, and the cathode flow channel plate. During operation, the retaining groove is located between the two fixing holes. During assembly, the retaining rod is first inserted to secure the stack assembly. The retaining rod is then removed after the screws are tightened.

[0079] In this embodiment, the ion exchange membrane is an alkaline exchange membrane (AEM), an acidic ion exchange membrane, or a bipolar membrane.

[0080] In this embodiment, the anode flow channel plate further includes an anode flow channel surface, which is concavely disposed on the anode flow channel plate, and the anode flow channel is convexly disposed on the anode flow channel surface.

[0081] In this embodiment, the cathode flow channel plate further includes a cathode flow channel surface, which is concavely disposed on the cathode flow channel plate, and the cathode flow channel is convexly disposed on the cathode flow channel surface.

[0082] In this embodiment, the anode flow channel and the cathode flow channel include but are not limited to column flow channels, serpentine flow channels, or interdigitated flow channels.

[0083] In this embodiment, the anode catalyst is a gas diffusion electrode (GDE) and includes an anode catalyst layer and an anode gas diffusion layer, wherein the anode catalyst layer contacts the first surface of the ion exchange membrane, and the anode gas diffusion layer contacts the anode flow channel of the anode flow channel plate.

[0084] In this embodiment, the anode catalyst is made of, but not limited to, iridium (Ir), nickel (Ni), platinum (Pt), iron (Fe), or oxides of the above metals, or a combination thereof.

[0085] Preferably, the anode catalyst is made of nickel (Ni), nickel iron (NiFe) or iridium dioxide (IrO 2 ).

[0086] Most preferably, the anode catalyst is made of iridium dioxide (IrO 2 ).

[0087] In this embodiment, the cathode catalyst is a gas diffusion electrode (GDE) and includes a cathode catalyst layer and a cathode gas diffusion layer, and the cathode catalyst layer contacts the second surface of the ion exchange membrane, and the cathode gas diffusion layer contacts the cathode flow channel of the cathode flow channel plate.

[0088] In this embodiment, the cathode catalyst is made of, but not limited to, copper (Cu), iron (Fe), silver (Ag), cobalt (Co), nickel (Ni), iridium (Ir), platinum (Pt), gold (Au), titanium (Ti), ruthenium (Ru), rhodium (Rh), or carbides, oxides, carbonitrides, or combinations thereof.

[0089] In this embodiment, the at least two air-blocking gaskets each have a specific thickness for controlling the height of the first accommodating space and the second accommodating space and adjusting a compression ratio of the first gap and the second gap.

[0090] Preferably, the first accommodating space is composed of the gas barrier gasket with a thickness of 0.25 mm, the anion exchange membrane and the anode flow channel plate, and the second accommodating space is composed of the gas barrier gasket with a thickness of 0.4 mm, the anion exchange membrane and the cathode flow channel plate. Since HER (Hydrogen evolution reaction) and CO2RR (Carbon dioxide reduction reaction) are competing reactions, reducing HER helps promote the occurrence of CO2RR.

[0091] Among them, the size of the first accommodating space and the second accommodating space will affect the diffusion capacity of the carbon dioxide gas and the selectivity and yield of the final output product. When the total thickness of the gas barrier gasket (PTFE) is 0.4-0.7 mm, the first accommodating space and the second accommodating space generated thereby achieve a better compression rate, enabling the carbon dioxide electrolyzer module 1 to have the best carbon dioxide Faraday efficiency.

[0092] Preferably, the total thickness of the gas barrier gasket (PTFE) is 0.65 mm.

[0093] In this embodiment, the air barrier gasket is but not limited to a gasket made of polypropylene (PP), polyamide (PA), acrylonitrile butadiene styrene (ABS), polyetherimide (PEI), polyphenylene sulfide (PPS), Teflon (PTFE) or polyetheretherketone matrix (PEEK matrix) material.

[0094] In this embodiment, two sealing gaskets are further included, which are respectively sealed between the anode flow channel plate and the gas blocking gasket, and between the cathode flow channel plate and the gas blocking gasket.

[0095] In this embodiment, the first inlet and the first outlet in the first end plate and the second inlet and the second outlet in the second end plate are all provided with a detachable adapter, and the detachable adapter is but not limited to an adapter made of plastic, stainless steel or metal.

[0096] In this embodiment, the first inlet and the first outlet in the first end plate are arranged in a diagonally mirrored manner to the second inlet and the second outlet in the second end plate.

[0097] Preferably, in the first embodiment of the electrolytic carbon dioxide reduction system 3 of the present invention, it also includes a peristaltic pump, a humidifier, and a condenser. The peristaltic pump is used to provide power for transporting the anode reactant into the fuel cell stack, and is used to regulate the flow rate of the cathode reactant input into the carbon dioxide electrolyzer module 1 through the mass flow control unit 302, and the humidifier is used to humidify the cathode reactant before inputting the carbon dioxide electrolyzer module 1.

[0098] In the first embodiment, the anode catalyst is composed of carbon paper and IrO2, the cathode catalyst is composed of carbon paper and silver, the carbon paper is a gas diffusion layer, the ion exchange membrane is an anion exchange membrane, the anion exchange membrane thickness is 20 to 100 μm, the anode reactant is an electrolyte, the electrolyte is a 0.1M KHCO3 aqueous solution, the preferred gas barrier gasket is PTFE, the adapter is stainless steel, and the anode and cathode flow channels are grid-shaped flow channels.

[0099] When the power supply is connected to the collector plate, power is provided to the carbon dioxide electrolyzer module 1 for electrolysis; the mass flow control unit 302 is used as the power for transporting carbon dioxide gas. When the gas enters the humidifier through the pipeline, the water content of the carbon dioxide gas will reach saturation, and the humidified carbon dioxide gas will continue to be transported into the carbon dioxide electrolyzer module 1 and enter the cathode flow channel plate. After flowing through the second accommodating space on the cathode flow channel, it diffuses through the carbon paper and contacts the silver catalyst to undergo a CO2RR reaction and produce product gases including but not limited to carbon oxides and hydrogen. After passing through the outlet of the cathode flow channel, it enters the condenser for condensation and dehydration and is collected; the electrolyte is transported by a peristaltic pump, so that the electrolyte is extracted from the electrolyte storage tank 305 and transported to the carbon dioxide electrolyzer module 1 through the pipeline, flows through all the anode flow channel plates through the third through hole, and undergoes an OER reaction (Oxygen evolution reaction) with the IrO2 anode catalyst when flowing through the anode flow channel to produce oxygen, wherein the water and anions in the electrolyte, such as OH - 、CO3 2-, will pass through the anion exchange membrane to reach the cathode to assist in the CO2RR reaction, while the electrolyte, water and oxygen passing through the outlet of the anode flow channel plate will be transported back to the electrolyte storage tank 305 through the pipeline and reused as the anode mixture.

[0100] The gas barrier gasket in the first embodiment has four third through holes, which are connected to each other in the fuel cell stack in parallel, so that gas and liquid can move in the fuel cell stack assembly, as shown in FIG4 .

[0101] Among them, in another embodiment, the gas barrier gasket has only two third through holes, and the connection method between each other in the fuel cell stack is series connection, so that the electrolyte and gas pass through the flow channel plate of the fuel cell stack component composed of a single fuel cell group in sequence, rather than passing through at the same time, thereby achieving the purpose of connecting the electrodes in series and increasing the reaction area, as shown in Figure 5.

[0102] Please refer to FIG6 , which is a flow chart of the reduction method of the present invention applicable to the electrolytic carbon dioxide reduction system, comprising the following steps:

[0103] Step S610: allowing the cathode reactant to flow through the mass flow control unit via the cathode reactant tank, and obtaining the mass flow rate;

[0104] Step S620: The control unit allows the cathode reactant to flow into the carbon dioxide electrolyzer module from the first water inlet of the first fluid multi-way valve according to the mass flow rate;

[0105] Step S630: allowing the anode reactant to flow into the carbon dioxide electrolyzer module through the electrolyte storage tank;

[0106] Step S640: electrolyzing the cathode reactant and the anode reactant using the carbon dioxide electrolysis cell module to form a cathode product;

[0107] Step S650: collecting the cathode product to a product storage unit through the second outlet of the second fluid multi-way valve.

[0108] In this embodiment, the following steps are also included: when the carbon dioxide electrolyzer module needs to be cleaned, the pure water cleaning liquid is allowed to flow into the carbon dioxide electrolyzer module from the second water inlet of the first fluid multi-way valve through the pure water tank to clean the internal pipeline of the carbon dioxide electrolyzer module; and the waste liquid is then discharged through the third water outlet of the first fluid multi-way valve.

[0109] In this embodiment, the following steps are further included: when the carbon dioxide electrolysis cell module discharges the heated anode reactant after the electrolysis reaction, the anode reactant is cooled by the electrolyte circulation cooling module and the anode reactant is returned to the electrolyte storage tank.

[0110] Preferably, when using the present invention, after the electrolysis period, the control unit opens the first flow multi-way valve, allowing the pure water in the pure water tank to enter the system through the first fluid multi-way valve. After flowing through the cathode flow channel plates, the waste liquid is discharged through the second fluid multi-way valve opened by the control unit to wash the crystallized salts in the flow channel, such as potassium carbonate.

[0111] In this embodiment, an electrolyte circulation cooling module is set in the pipeline for the electrolyte to return to the electrolyte storage tank, so that the electrolyte is cooled before returning to the electrolyte storage tank. The electrolyte circulation cooling module controls the temperature of the battery stack by placing thermoelectric corners at the outlet and inlet of the battery stack electrolyte, respectively, and these thermoelectric corners are connected to a control unit. When the thermoelectric corners at the outlet detect that the temperature of the electrolyte flowing out of the battery stack is higher than the set value, 65°C is set here, indicating that the temperature of the battery stack is too high. The control unit then sends a signal to the peristaltic pump to accelerate the speed at which the pump transports the cooled electrolyte, so as to remove excess heat in the battery stack and achieve the purpose of controlling the temperature of the battery stack.

[0112] When cleaning the battery stack, first turn off the power supply and replace the electrolyte with water, preferably deionized water, so that the deionized water circulates in the anode flow channel of the battery stack. When the deionized water passes through the anode flow channel plates, the potassium ions and salts accumulated on the surface and inside of the cathode plate will diffuse into the deionized water due to the concentration difference, thereby reducing the salt deposition in the cathode plate and increasing the life of the battery stack.

[0113] In summary, the carbon dioxide electrolyzer module, electrolytic carbon dioxide reduction system, and reduction method of the present invention utilize an anode flow channel plate and a cathode flow channel plate via a gas diffusion electrode as the anode electrode and cathode electrode, and utilize membrane electrode assembly (MEA) technology to effectively reduce the distance between the electrodes and thereby reduce resistance, thereby enhancing electrode stability and high current density. This reduces the energy consumption required for carbon dioxide electrolysis, allows for electrolytic reduction of carbon dioxide with better reaction efficiency, and achieves energy conservation.

[0114] Although the present invention is disclosed above with reference to the aforementioned embodiments, they are not intended to limit the present invention. Any equivalent substitutions and modifications made by persons skilled in the art without departing from the spirit and scope of the present invention are still within the scope of patent protection of the present invention.

Claims

1. A carbon dioxide electrolyzer module, comprising: A stack assembly is formed by stacking at least two single stack groups, and is used to electrolyze a cathode reactant and an anode reactant to produce a cathode product, wherein the single stack group further includes: An ion exchange membrane having a plurality of membrane pores and having a first surface and a second surface arranged opposite to each other; an anode channel plate disposed on the first surface side of the ion exchange membrane, the anode channel plate having at least four first through holes and an anode channel; a cathode flow channel plate disposed on the second surface side of the ion exchange membrane, the cathode flow channel plate having at least four second through holes corresponding to the at least four first through holes and a cathode flow channel, wherein the anode flow channel plate and the cathode flow channel plate are combined in a manner that the anode flow channel and the cathode flow channel are disposed facing each other; an anode catalyst, which is disposed in a first accommodation space between the ion exchange membrane and the anode flow channel plate, wherein a first gap exists in the first accommodation space to allow the anode reactant to flow; a cathode catalyst, which is disposed in a second accommodation space between the ion exchange membrane and the cathode flow channel plate, wherein a second gap exists in the second accommodation space to allow the cathode reactant to flow; and At least two gas barrier gaskets are respectively disposed between the anode flow channel plate and the ion exchange membrane, and between the cathode flow channel plate and the ion exchange membrane, and have at least two third through holes corresponding to the at least four first through holes, so as to form a connecting channel, so that the cathode reactant and the anode reactant contact the anode catalyst and the cathode catalyst respectively through the connecting channel; A first end plate, which is disposed on one side of the stack assembly and has a first inlet and a first outlet; a second end plate disposed at the other side of the battery stack assembly so that the battery stack assembly is sandwiched between the first end plate and the second end plate, the second end plate having a second inlet and a second outlet; a first insulating plate, disposed between the first end plate and the battery stack assembly, and having a first insulating plate through hole and a first collector plate slot corresponding to the first inlet and the first outlet; a second insulating plate disposed between the second end plate and the battery stack assembly and having a second insulating plate through hole and a second collector plate slot corresponding to the second inlet and the second outlet; and Two collector plates are respectively disposed in the first collector plate slot and the second collector plate slot for contacting the battery stack assembly.

2. The carbon dioxide electrolyzer module according to claim 1, wherein the first end plate has at least one first fixing hole, the second end plate has at least one second fixing hole corresponding to the at least one first fixing hole, and the first end plate and the second end plate are fixed to each other through at least one first fixing component and at least one second fixing component through the at least one first fixing hole and the at least one second fixing hole, so that the first end plate, the second end plate and the stack assembly constitute the carbon dioxide electrolyzer module.

3. The carbon dioxide electrolyzer module according to claim 2, wherein the stack assembly further comprises at least one limit groove, through which a limit rod for assisting in fixing the positions of the first end plate, the second end plate, the first insulating plate, the second insulating plate, the anode flow channel plate, and the cathode flow channel plate passes.

4. The carbon dioxide electrolyzer module according to claim 1, wherein the ion exchange membrane is an alkaline ion exchange membrane, an acidic ion exchange membrane or a bipolar membrane.

5. The carbon dioxide electrolyzer module according to claim 1, wherein the anode channel plate further comprises an anode channel surface, which is concavely arranged on the anode channel plate, and the anode channel is convexly arranged on the anode channel surface.

6. The carbon dioxide electrolyzer module according to claim 1, wherein the cathode flow channel plate further comprises a cathode flow channel surface, which is concavely arranged on the cathode flow channel plate, and the cathode flow channel is convexly arranged on the cathode flow channel surface. 7 . The carbon dioxide electrolyzer module according to claim 1 , wherein the anode flow channel and the cathode flow channel comprise grid-like flow channels, serpentine flow channels or interdigitated flow channels.

8. The carbon dioxide electrolyzer module according to claim 1, wherein the anode catalyst is a gas diffusion electrode and comprises an anode catalyst layer and an anode gas diffusion layer, and the anode catalyst layer is in contact with the first surface of the ion exchange membrane, and the anode gas diffusion layer is in contact with the anode flow channel of the anode flow channel plate.

9. The carbon dioxide electrolyzer module according to claim 1, wherein the anode catalyst is made of iridium, nickel, platinum, iron, or oxides of the above metals, or a combination of the above materials.

10. The carbon dioxide electrolyzer module according to claim 1, wherein the cathode catalyst is a gas diffusion electrode and comprises a cathode catalyst layer and a cathode gas diffusion layer, and the cathode catalyst layer is in contact with the second surface of the ion exchange membrane, and the cathode gas diffusion layer is in contact with the cathode flow channel of the cathode flow channel plate.

11. The carbon dioxide electrolyzer module according to claim 1, wherein the cathode catalyst is made of copper, iron, silver, cobalt, nickel, iridium, platinum, gold, titanium, ruthenium, rhodium or carbides, oxides, carbonitrides or combinations thereof.

12. The carbon dioxide electrolyzer module according to claim 1, wherein the at least two gas barrier gaskets each have a thickness for controlling the height of the first accommodating space and the second accommodating space and adjusting a compression rate of the first gap and the second gap.

13. The carbon dioxide electrolyzer module according to claim 1, wherein the gas barrier gasket is a gasket made of a matrix material of polypropylene, polyamide, acrylonitrile-butadiene-styrene, polyetherimide, polyphenylene sulfide, Teflon or polyetheretherketone. 14 . The carbon dioxide electrolyzer module according to claim 1 , further comprising two sealing gaskets, respectively sealed between the anode flow channel plate and the gas blocking gasket, and between the cathode flow channel plate and the gas blocking gasket.

15. The carbon dioxide electrolyzer module according to claim 1, wherein the first inlet and the first outlet in the first end plate and the second inlet and the second outlet in the second end plate are both provided with a detachable adapter, and the detachable adapter is an adapter made of plastic, stainless steel or metal.

16. The carbon dioxide electrolyzer module according to claim 1, wherein the first inlet and the first outlet in the first end plate are arranged diagonally in mirror image with the second inlet and the second outlet in the second end plate.

17. An electrolytic carbon dioxide reduction system, comprising the carbon dioxide electrolyzer module according to any one of claims 1 to 16, further comprising: A cathode reactant tank for storing a cathode reactant, wherein the cathode reactant includes CO2, H2O, H + or OH - Compounds of a mass flow control unit connected to the cathode reactant tank to receive the flow of the cathode reactant and obtain a mass flow rate; A pure water tank for storing a pure water washing liquid for washing the carbon dioxide electrolyzer module; a first fluid multi-way valve having a first water inlet connected to the mass flow control unit, a second water inlet connected to the pure water tank, and a first water outlet connected to the carbon dioxide electrolyzer module; An electrolyte storage tank is used to store an anode reactant, wherein the anode reactant includes 1A group ions, OH - 、CO3 2- , H2O or PO4 3- and connected to the carbon dioxide electrolyzer module; an electrolyte circulation cooling module, connected to the carbon dioxide electrolyzer module and the electrolyte storage tank, for cooling the anode reactant after the reaction in the carbon dioxide electrolyzer module and injecting it into the electrolyte storage tank; a second fluid multi-way valve having a third water inlet connected to the carbon dioxide electrolyzer module, a second water outlet and a third water outlet for respectively conducting a cathode product generated after the reaction of the carbon dioxide electrolyzer module, or a waste liquid flowing out after washing the carbon dioxide electrolyzer module; a product storage unit, coupled to the second fluid multi-way valve, for collecting the cathode product; as well as A control unit is electrically connected to the mass flow control unit, the first fluid multi-way valve, the second fluid multi-way valve, and the electrolyte circulation cooling module to control the cathode reactant and the anode reactant to flow into the carbon dioxide electrolysis cell module and produce the cathode product.

18. The electrolytic carbon dioxide reduction system according to claim 17, wherein the first inlet in the first end plate is used to flow in the cathode reactant or the pure water washing liquid, and the first outlet is used to flow out the cathode product or the waste liquid.

19. The electrolytic carbon dioxide reduction system according to claim 17, wherein the second inlet and the second outlet in the second end plate are respectively used for the anode reactant to flow in and the anode reactant heated after the electrolytic reaction to flow out.

20. A reduction method applicable to the electrolytic carbon dioxide reduction system of claim 17, comprising the following steps: The cathode reactant flows through the mass flow control unit through the cathode reactant tank, and the mass flow rate is obtained. Rate; The control unit enables the cathode reactant to flow into the carbon dioxide electrolyzer module from the first water inlet of the first fluid multi-way valve according to the mass flow rate; Allowing the anode reactant to flow into the carbon dioxide electrolyzer module through the electrolyte storage tank; Using the carbon dioxide electrolyzer module to electrolyze the cathode reactant and the anode reactant to form the cathode product; The cathode product is then collected into the product storage unit through the second water outlet of the second fluid multi-way valve.

21. The reduction method according to claim 20, further comprising the following steps: When the carbon dioxide electrolyzer module needs to be cleaned, the pure water cleaning liquid is allowed to flow into the carbon dioxide electrolyzer module from the second water inlet of the first fluid multi-way valve through the pure water tank to clean the internal pipeline of the carbon dioxide electrolyzer module; The waste liquid is then discharged through the third water outlet of the first fluid multi-way valve.

22. The reduction method according to claim 20 further comprises the following step: when the carbon dioxide electrolyzer module discharges the heated anode reactant after the electrolysis reaction, the anode reactant is cooled by the electrolyte circulation cooling module and the anode reactant is returned to the electrolyte storage tank.

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