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

Abstract

A carbon dioxide electrolysis cell module, an electrolytic carbon dioxide reduction system and a reduction method wherein the carbon dioxide electrolysis cell module comprises: a stack assembly formed by stacking single stack groups for electrolyzing a cathode reactant and an anode reactant and producing a cathode product, the single stack group comprising: an ion exchange membrane having a plurality of membrane holes; the anode runner plate is provided with a first through hole and an anode runner; the cathode runner plate is provided with a second through hole corresponding to the first through hole and a cathode runner; an anode catalyst; a cathode catalyst; and an air blocking gasket. A first end plate; a second end plate; the first insulating plate is provided with a first insulating plate through hole and a first collector plate groove which correspond to the first inlet and the first outlet of the first end plate; the second insulating plate is provided with a second insulating plate through hole and a second collector plate groove corresponding to the second inlet and the second outlet of the second end plate; and two collector plates. Therefore, the energy consumption required for electrolyzing the carbon dioxide is small, and the effect of saving energy is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of generating hydrocarbons, and in particular to a carbon dioxide electrolyzer 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 demand is met by the combustion of fossil fuels. The combustion process causes the world to emit about 34 billion tons of carbon dioxide into the atmosphere each year, most of which is directly emitted into the atmosphere. Carbon dioxide is a greenhouse gas that has adverse effects on the atmosphere and climate, thereby causing global warming and ocean acidification.

[0003] In terms of the reuse of carbon dioxide, 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. Summary of the invention

[0004] 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 a carbon dioxide electrolyzer module with a new structure to perform an electrolytic reaction.

[0005] A carbon dioxide electrolyzer module of the present invention comprises: a stack assembly formed by stacking at least two single stacks, used 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 holes and having a first surface and a second surface arranged oppositely; an anode flow channel plate 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 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 accommodation space between the ion exchange membrane and the anode flow channel plate, and a first gap exists in the first accommodation space to enable the anode reactant to flow; a cathode catalyst is arranged in a second accommodation space between the ion exchange membrane and the cathode flow channel plate, and a first gap exists in the second accommodation space to enable the cathode reactant to flow a second gap; and at least two air-blocking 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.

[0006] 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.

[0007] In one embodiment of the present invention, the above-mentioned battery stack assembly further includes at least one limit groove, which is used for a limit 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.

[0008] 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.

[0009] In one embodiment of the present invention, the anode channel plate further comprises an anode channel surface which is concavely disposed on the anode channel plate, and the anode channel is convexly disposed on the anode channel surface.

[0010] In one embodiment of the present invention, the cathode flow channel plate further comprises 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.

[0011] 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.

[0012] In one embodiment of the present invention, the above-mentioned 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.

[0013] 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 of the above materials.

[0014] 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.

[0015] 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.

[0016] In an embodiment of the present invention, the at least two gas blocking gaskets mentioned above both 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.

[0017] In one embodiment of the present invention, the above-mentioned 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.

[0018] In one embodiment of the present invention, the carbon dioxide electrolyzer module further comprises two sealing gaskets, 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.

[0019] 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.

[0020] In one embodiment of the present invention, 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.

[0021] The present invention also includes an electrolytic carbon dioxide reduction system, which includes a carbon dioxide electrolyzer 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 to receive the flow of the cathode reactant and obtain a mass flow rate; a pure water tank to store 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 to store 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, used to cool the anode reactant after the reaction in the carbon dioxide electrolyzer module and inject it 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, used to respectively guide out 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, used to collect 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, used to control the cathode reactant and the anode reactant to flow into the carbon dioxide electrolyzer module and produce the cathode product.

[0022] 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.

[0023] In one embodiment of the present invention, the second inlet and the second outlet in the second end plate are used to flow in the anode reactant and flow out the anode reactant heated after the electrolysis reaction, respectively.

[0024] 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 obtaining 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.

[0025] In one embodiment of the present invention, the above-mentioned reduction method also includes the following steps: when the carbon dioxide electrolyzer module needs to be cleaned, the pure water washing 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.

[0026] In one embodiment of the present invention, the above-mentioned reduction method further includes the following steps: when the carbon dioxide electrolysis cell module flows out the heated anode reactant after the electrolysis reaction, the anode reactant is cooled by the electrolyte circulation cooling module and the anode reactant flows back to the electrolyte storage tank.

[0027] 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 an anode electrode and a cathode electrode respectively, and use membrane electrode assembly (MEA) technology to effectively reduce the distance between electrodes and reduce resistance, thereby improving the stability and high current density of the electrodes, so that the energy consumption required for electrolyzing carbon dioxide is smaller, and carbon dioxide is electrolyzed and reduced with better reaction efficiency, thereby achieving the effect of saving energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic diagram of a carbon dioxide electrolyzer module of the present invention; Figure 2 is a schematic diagram of a single stack group in a carbon dioxide electrolyzer module of the present invention; Figure 3 is a functional block diagram of the electrolytic carbon dioxide reduction system of the present invention; Figure 4 1 is a schematic diagram of stacking carbon dioxide electrolysis cell modules in the electrolytic carbon dioxide reduction system in the first embodiment of the present invention; Figure 5 is a schematic diagram of stacking carbon dioxide electrolysis cell modules in the electrolytic carbon dioxide reduction system in the second embodiment of the present invention; Figure 6 It is a flow chart of the steps of the reduction method applicable to the electrolytic carbon dioxide reduction system of the present invention.

[0029] Explanation of symbols in the accompanying drawings: 1 CO2 electrolyzer module; 11. Battery stack components; 110 single stack group; 1101 ion exchange membrane; 1102 anode flow channel plate; 11021 first through hole; 1103 cathode channel plate; 11031 second through hole; 11032 cathode flow channel; 1104 Anode catalyst; 1105 cathode catalyst; 11051 second accommodation space; 1106 air barrier gasket; 12 first end plate; 121 First Entrance; 122 First Exit; 13 second end plate; 131 Second Entrance; 132 Second Exit; 14 a 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 carbon dioxide reduction system; 301 cathode reactant tank; 302 mass flow control unit; 303 Pure Sink; 304 a 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; S610~S650 step process. DETAILED DESCRIPTION

[0030] 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 in conjunction with the attached 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 on 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 only and do not represent the actual size or quantity of the components. Some details may not be fully drawn. In order to simplify the drawings, detailed descriptions are given as follows.

[0031] Please refer to Figure 1 , Figure 1Schematic diagram of the carbon dioxide electrolyzer module of the present invention. The carbon dioxide electrolyzer module of the present invention comprises: a stack assembly 11, formed by stacking at least two single stack groups 110 ( Figure 1In the figure, only a single single stack group 110 is shown, which 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 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, 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, and the cathode flow channel plate 1103 has at least four through holes 11021 corresponding to the at least four first through holes 11021. a second through hole 11031 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 second gap that allows the cathode reactant to flow; and at least two gas blocking gaskets 1106, They 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, so as to form 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 sandwiched between the first end 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, which are respectively arranged in the first collector plate groove and the second collector plate groove 152, for contacting the battery stack assembly 11.

[0032] 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 and the at least one second 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.

[0033] In this embodiment, the stack assembly 11 further includes at least one limiting groove, through which a limiting 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. In operation, the limiting groove is located in the center of the two fixing holes. During assembly, the positioning rod will be inserted first to fix the position of the stack assembly, and then the positioning rod will be lifted up after the screws are locked.

[0034] In this embodiment, the ion exchange membrane 1101 is an alkaline ion exchange membrane (AEM), an acidic ion exchange membrane or a bipolar membrane.

[0035] In the present embodiment, the anode channel plate 1102 further includes an anode channel surface, which is concavely disposed on the anode channel plate 1102, and the anode channel is convexly disposed on the anode channel surface.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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 of the above materials.

[0040] Preferably, the anode catalyst 1104 is made of nickel (Ni), nickel iron (NiFe) or iridium dioxide (IrO 2 ).

[0041] Optimally, the anode catalyst 1104 is made of iridium dioxide (IrO 2 ) material.

[0042] 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.

[0043] 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 of the above metals.

[0044] In the present embodiment, the at least two air blocking gaskets 1106 have a specific thickness to control the height of the first accommodating space and the second accommodating space 11051 and adjust a compression rate of the first gap and the second gap.

[0045] 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.

[0046] 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 .

[0047] 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.

[0048] In this embodiment, the first inlet 121 and the first outlet 122 in the first end plate 12 are arranged diagonally in mirror image with the second inlet 131 and the second outlet 132 in the second end plate 13 .

[0049] Please refer to Figure 2 , Figure 2 is a schematic diagram of a single stack in a carbon dioxide electrolyzer module of the present invention, Figure 2 The single stack group 110 in the embodiment 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, and 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, and 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 arranged in a manner that the anode flow channel and the cathode flow channel 11032 face each other. combination; an anode catalyst 1104, which is arranged in a first accommodating space 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 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.

[0050] In this embodiment, the ion exchange membrane 1101 is an alkaline ion exchange membrane (AEM), an acidic ion exchange membrane, or a bipolar membrane.

[0051] In this embodiment, a plurality of the single fuel cell stack groups 110 are stacked to form the fuel cell stack assembly 11 .

[0052] In the present embodiment, the anode channel plate 1102 further includes an anode channel surface, which is concavely disposed on the anode channel plate 1102, and the anode channel is convexly disposed on the anode channel surface.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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 of the above materials.

[0057] Preferably, the anode catalyst 1104 is made of nickel (Ni), nickel iron (NiFe) or iridium dioxide (IrO 2 ).

[0058] Optimally, the anode catalyst 1104 is made of iridium dioxide (IrO 2 ) material.

[0059] 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.

[0060] 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 of the above metals.

[0061] 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).

[0062] In the present embodiment, the at least two air blocking gaskets 1106 have a specific thickness to control the height of the first accommodating space and the second accommodating space 11051 and adjust a compression rate of the first gap and the second gap.

[0063] 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 competitive reaction relationship, reducing HER helps promote the occurrence of CO2RR.

[0064] Among them, the size of the first accommodating space and the second accommodating space 11051 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 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 oxidation Faraday efficiency.

[0065] 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.

[0066] 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 .

[0067] Please refer to Figure 3 , Figure 3 3 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 to receive the flow of the cathode reactant and obtain a mass flow rate; a pure water tank 303 to store a pure water washing liquid for washing the carbon dioxide electrolyzer 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 electrolyzer module 1; an electrolyte storage tank 305 to store 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 1; an electrolyte circulation cooling module 306, connected to the carbon dioxide electrolyzer module 1 and the electrolyte storage tank 305, for cooling the anode reactant after the reaction of the carbon dioxide electrolyzer 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 electrolyzer module 1, a second water outlet and a third water outlet for respectively conducting the generated after the reaction of the carbon dioxide electrolyzer module 1 A cathode product, or a waste liquid flowing out after washing the carbon dioxide electrolyzer 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 electrolyzer module 1 and produce the cathode product.

[0068] In this embodiment, the half-reaction of the cathode reactant at the cathode is: .

[0069] Among them, the half reaction of the anode reactant at the anode is: .

[0070] The product equation is: .

[0071] 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 by 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.

[0072] In this embodiment, the stack assembly further includes at least one limiting groove, through which a limiting 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. In operation, the limiting groove is located in the middle of the two fixing holes. During assembly, the positioning rod will be inserted first to fix the position of the stack assembly, and then the positioning rod will be lifted up after the screws are locked.

[0073] In this embodiment, the ion exchange membrane is an alkaline ion exchange membrane (AEM), an acidic ion exchange membrane, or a bipolar membrane.

[0074] In this embodiment, the anode channel plate further includes an anode channel surface, which is concavely disposed on the anode channel plate, and the anode channel is convexly disposed on the anode channel surface.

[0075] In this embodiment, the cathode flow channel plate further includes 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.

[0076] 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.

[0077] In this embodiment, 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 channel of the anode channel plate.

[0078] 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 of the above materials.

[0079] Preferably, the anode catalyst is made of nickel (Ni), nickel iron (NiFe) or iridium dioxide (IrO 2 ) material.

[0080] Preferably, the anode catalyst is made of iridium dioxide (IrO2) material.

[0081] 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.

[0082] 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.

[0083] In the present embodiment, the at least two air-blocking gaskets have a specific thickness to control the height of the first accommodating space and the second accommodating space and adjust a compression rate of the first gap and the second gap.

[0084] 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 in a competitive reaction relationship, reducing HER helps promote the occurrence of CO2RR.

[0085] 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 0.4-0.7mm, the first accommodating space and the second accommodating space generated can achieve a better compression rate, which can enable the carbon dioxide electrolyzer module 1 to have the best carbon oxide Faraday efficiency.

[0086] Preferably, the total thickness of the gas barrier gasket (PTFE) is 0.65 mm.

[0087] 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 (PEEKmatrix) material.

[0088] 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.

[0089] 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 both provided with a detachable adapter, and the detachable adapter is but not limited to an adapter made of plastic, stainless steel or metal.

[0090] In this embodiment, 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.

[0091] 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 adjust 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.

[0092] 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 thickness of the anion exchange membrane is 20 to 100µm, 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-like flow channels.

[0093] When the power supply is connected to the collector plate, the carbon dioxide electrolyzer module 1 is provided with power for electrolysis; the mass flow control unit 302 is used as the power for conveying 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 conveyed 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 plate, it enters the condenser for condensation and dehydration and is collected; the electrolyte uses a peristaltic pump as the conveying power, so that the electrolyte is extracted from the electrolyte storage tank 305 and then conveyed 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 reach the cathode through the anion exchange membrane to assist 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 an anode mixture.

[0094] The gas barrier gasket in the first embodiment has four third through holes, which are connected to each other in the battery stack in parallel, so that the movement of gas and liquid in the battery stack assembly is as follows: Figure 4 shown.

[0095] Among them, in another embodiment, the gas barrier gasket has only two third through holes, and the way of connecting each other in the battery stack is series connection, so that the electrolyte and the gas pass through the flow channel plate of the battery stack assembly composed of the single battery stack group in sequence, rather than passing through at the same time, so as to achieve the purpose of connecting the electrodes in series and increasing the reaction area. Figure 5 shown.

[0096] Please refer to Figure 6 , Figure 6 The present invention is a flow chart of the steps of the reduction method applicable to the electrolytic carbon dioxide reduction system, comprising the following steps: Step S610: passing the cathode reactant tank to allow the cathode reactant to flow through the mass flow control unit, and obtaining the mass flow rate; Step S620: controlling 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 through the control unit; Step S630: allowing the anode reactant to flow into the carbon dioxide electrolyzer module through the electrolyte storage tank; Step S640: electrolyzing the cathode reactant and the anode reactant using the carbon dioxide electrolysis cell module to form a cathode product; Step S650: collecting the cathode product to a product storage unit through the second outlet of the second fluid multi-way valve.

[0097] 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.

[0098] In this embodiment, the following steps are also included: 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.

[0099] Preferably, when using the present invention, after the electrolysis period, the control unit opens the first fluid multi-way valve to allow 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.

[0100] In this embodiment, an electrolyte circulation cooling module is set in the pipeline for the electrolyte to flow back to the electrolyte storage tank, so that the electrolyte is cooled before flowing back to the electrolyte storage tank. The electrolyte circulation cooling module controls the temperature of the battery stack in the following way: thermoelectric corners are placed at the outlet and inlet of the battery stack electrolyte, respectively, and the thermoelectric corners are connected to the 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, which means 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.

[0101] 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 electrode will diffuse into the deionized water due to the concentration difference, thereby reducing the salt deposition in the cathode electrode and increasing the life of the battery stack.

[0102] In summary, 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 as an anode electrode and a cathode electrode through a gas diffusion electrode, and use membrane electrode assembly (MEA) technology to effectively reduce the distance between electrodes and reduce resistance, thereby improving the stability and high current density of the electrodes, so that the energy consumption required for electrolyzing carbon dioxide is smaller, and carbon dioxide is electrolyzed and reduced with better reaction efficiency, thereby achieving the effect of saving energy.

[0103] Although the present invention is disclosed as above with the aforementioned embodiments, it is not intended to limit the present invention. Any equivalent substitutions made by anyone 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, characterized in that: include: 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, characterized in that: 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 by 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, characterized in that: The stack assembly further includes at least one limiting groove through which a limiting 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, characterized in that: 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, characterized in that: The anode channel plate further includes 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, characterized in that: The cathode flow channel plate further includes 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, characterized in that: The anode flow channel and the cathode flow channel include grid-shaped flow channels, serpentine flow channels or interdigitated flow channels.

8. The carbon dioxide electrolyzer module according to claim 1, characterized in that: The anode catalyst is a gas diffusion electrode and includes an anode catalyst layer and an anode gas diffusion layer. 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.

9. The carbon dioxide electrolyzer module according to claim 1, characterized in that: 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, characterized in that: The cathode catalyst is a gas diffusion electrode and includes a cathode catalyst layer and a cathode gas diffusion layer. 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.

11. The carbon dioxide electrolyzer module according to claim 1, characterized in that: 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, characterized in that: The at least two air-blocking gaskets both 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, characterized in that: The gas barrier gasket is a gasket made of polypropylene, polyamide, acrylonitrile-butadiene-styrene, polyetherimide, polyphenylene sulfide, Teflon or polyetheretherketone matrix material.

14. The carbon dioxide electrolyzer module according to claim 1, characterized in that: It further comprises two sealing gaskets, 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.

15. The carbon dioxide electrolyzer module according to claim 1, characterized in that: 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 an adapter made of plastic, stainless steel or metal.

16. The carbon dioxide electrolyzer module according to claim 1, characterized in that: 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, characterized in that: A carbon dioxide electrolyzer module comprising 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; and 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, characterized in that: 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.

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

20. A reduction method applicable to the electrolytic carbon dioxide reduction system of claim 17, characterized in that: It includes the following steps: Allowing the cathode reactant to flow through the mass flow control unit through the cathode reactant tank and obtaining the mass flow 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, characterized in that: It also 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; 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, characterized in that: The method also includes the following steps: when the carbon dioxide electrolyzer module flows out the heated anode reactant after the electrolysis reaction, the anode reactant is cooled by the electrolyte circulation cooling module, and the anode reactant is made to flow back to the electrolyte storage tank.

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