TW202405247A - Electrochemical equipment for reduction of carbon dioxide and system thereof - Google Patents

Abstract

An electrochemical equipment for reduction of carbon dioxide and system thereof is provided with cathode compartment, catholyte compartment, anode compartment, anolyte chamber, and isolation unit.

Description

Electrochemical treatment equipment and systems for reducing carbon dioxide

The present invention discloses an equipment and system for reducing carbon dioxide, in particular, an electrochemical treatment equipment and system for reducing carbon dioxide.

"Carbon emissions" are greenhouse gases produced directly or indirectly by humans in various activities. When greenhouse gases are emitted into the earth's atmosphere, they will produce a greenhouse effect and cause global warming. The total amount of greenhouse gases The weight is called "carbon emissions". Among various greenhouse gases, carbon dioxide (CO ₂ ) accounts for the largest proportion in the atmosphere. Therefore, the weight of carbon dioxide is the most common measure of carbon emissions, and the so-called carbon footprint can be defined as a The amount of carbon dioxide emissions produced directly and indirectly during the entire life cycle of an activity or product. The life cycle here refers to the raw materials obtained or generated from natural resources to the final disposal. Regarding the product, The continuous and interconnected processes in a system.

The aforementioned greenhouse gas effect caused by carbon dioxide, that is, the increase in greenhouse gases due to the rapid growth of carbon emissions, has become one of the important factors leading to climate change. The huge impact of carbon emissions on the earth includes global warming. The speed of global warming is accelerating, the global average temperature is rising, and sea levels are rising, which intensifies extreme climate and leads to accelerated global warming. Therefore, if we want to slow down the impact of global warming on the earth, The most direct and effective way is to reduce greenhouse gases, in other words, to reduce carbon emissions as quickly as possible.

In order to achieve net-zero carbon emissions, it is an urgent goal for mankind around the world. Therefore, technology to capture, reuse and store carbon dioxide is accelerating research and development. 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, it combines a photocatalyst and a water decomposition system to decompose water to produce oxygen and process carbon dioxide. Reduction, that is, using photocatalysts to reduce and convert carbon dioxide into hydrocarbons or alcohol chemical fuels. This stage uses solar energy to split water (H ₂ O) to produce hydrogen or convert carbon dioxide into fuels, and metal catalysts are used to reduce carbon dioxide. Water or non-aqueous solutions of carbon dioxide produce hydrocarbon or alcohol chemical fuels. However, including the aforementioned photocatalyst method, it can only be carried out in batch reaction devices and the energy conversion efficiency is relatively low, which is not conducive to industries that need to process large amounts of carbon dioxide. .

Therefore, the industry is very much looking forward to the development of an electrochemical treatment equipment or system that can effectively reduce carbon dioxide, and it will benefit related industries to develop and utilize such highly environmentally friendly electrochemical equipment and systems related to carbon dioxide.

The invention provides an electrochemical treatment equipment and system for reducing carbon dioxide. Carbon dioxide is used as feed material as carbon dioxide gas, and a permeable gas diffusion electrode is used as a cathode electrode. The function of the gas diffusion electrode is mainly to increase the concentration of reactants and thereby improve reactivity. (high current density).

According to the foregoing, a three-chamber electrochemical treatment device for reducing carbon dioxide according to the present invention at least includes: the cathode chamber includes a cathode gas input port and a cathode gas output port, wherein the carbon dioxide gas feed enters the cathode chamber from the cathode gas input port , a mixture with carbon dioxide reduction products the body leaves the cathode chamber from the cathode gas output port; a cathode electrolyte chamber that allows the cathode electrolyte to pass or stay, wherein the cathode electrode is disposed between the cathode chamber and the cathode electrolyte chamber, and the cathode electrode reduces the carbon dioxide gas feed, A mixed gas and a mixed liquid with carbon dioxide reduction products are formed, leaving the device through the cathode gas output port and the liquid output port respectively; an isolation unit; and an anode chamber, and the isolation unit separates the anode chamber and the cathode electrolyte chamber, and the anode chamber includes The anode input port, the anode output port and the anode electrode. The anode chamber is adjacent to the isolation unit with the anode electrode, and the isolation unit is adjacent to the cathode electrolyte chamber. The anode feed enters the anode chamber from the anode input port and contacts the anode electrode. The anode feed is liquid, and the anode discharge leaves the anode chamber from the anode output port.

According to the foregoing, a four-chamber electrochemical treatment device for reducing carbon dioxide according to the present invention at least includes: a cathode chamber, including a cathode gas input port, and a cathode gas output port, wherein the carbon dioxide gas feed enters the cathode from the cathode gas input port Chamber, the mixed gas with carbon dioxide reduction products leaves the cathode chamber from the cathode gas output port; the cathode electrolyte chamber, which allows the cathode electrolyte to pass or stay, the cathode electrode reduces the carbon dioxide gas feed to form a mixed gas with carbon dioxide reduction products and The mixed liquid leaves the device through the cathode gas output port and the liquid output port respectively, the cathode electrode is arranged between the cathode chamber and the cathode electrolyte chamber; an isolation unit; an anode electrolyte chamber and the isolation unit separates the anode electrolyte chamber and a cathode electrolyte chamber, the anode electrolyte chamber has an anolyte input port and an anolyte output port, wherein the anolyte feed enters the anode electrolyte chamber from the anolyte input port, and the anolyte discharge is made by the anode electrolyte The liquid output port leaves the anode electrolyte chamber; and the anode chamber includes an anode input port, an anode output port and an anode electrode. The anode electrode is disposed between the anode chamber and the anode electrolyte chamber, and the anode electrolyte chamber is between the isolation unit and the anode electrolyte chamber. Between the anode electrodes, the anode feed enters the anode chamber from the anode input port to contact the anode electrode, the anode feed is gas, and the anode discharge leaves the anode chamber from the anode output port.

A system of electrochemical treatment equipment for reducing carbon dioxide according to the present invention includes a plurality of electrochemical treatment equipment for reducing carbon dioxide connected to each other in series or in parallel, or in any combination of series and parallel.

An electrochemical treatment equipment for reducing carbon dioxide of the present invention has the advantage that when the carbon dioxide feed is carbon dioxide gas, the problem of poor solubility of carbon dioxide in general catholyte can be avoided, and a gas diffusion electrode can be used as a cathode electrode, thereby Increasing the reactant concentration results in a high current density, thereby increasing reactivity.

The advantage of the electrochemical treatment equipment for reducing carbon dioxide of the present invention is that when the arrangement method used in the present invention is used, the distance between the electrodes can be effectively reduced to reduce the resistance, thereby reducing the resistance of the reaction tank and improving the stability of the electrodes and high current. density.

The invention is an electrochemical treatment equipment for reducing carbon dioxide. It has the advantage of isolating the chamber with an isolation unit, thereby blocking the materials in the two chambers to a limited extent and preventing direct exchange of materials. At the same time, it allows the flow of ions to maintain the necessary conditions for the operation of the electrolyzer. Electrically neutral balance.

An electrochemical treatment device for reducing carbon dioxide according to the present invention has the advantage of using gas-liquid splitting, and the cathode electrolyte chamber and the cathode chamber can each be provided with their own input port and output port. Therefore, the products of different phases produced after the cathode electrolysis reaction can be directly separated and left the cathode chamber and the cathode electrolyte chamber through their respective output ports, which has the effect of reducing the cost of separating products and improving the purity of the products. Similarly, the anode chamber can also use the same method to achieve gas-liquid splitting to facilitate the separation of gas-liquid products.

In order to further understand the technical content and features of the present invention, please refer to the following detailed description and drawings of the present invention. However, the drawings provided herein are for reference and illustration purposes and are not intended to limit the present invention.

2: Electrochemical treatment equipment for reducing carbon dioxide

4: Electrochemical treatment equipment for reducing carbon dioxide

10:Cathode chamber

11:Cathode electrolyte chamber

12:Cathode electrode

13:Cathode gas input port

14: Carbon dioxide gas feed

15:Cathode gas output port

16: Mixed gas with carbon dioxide reduction products

20:Anode chamber

21:Anode chamber

22:Anode electrode

23:Anode input port

24: Anode feed (liquid)

25:Anode output port

26: Anode discharging

30:Isolation unit

33:Cathode electrolyte input port

34: Catholyte feed

35:Liquid output port

36: Liquid products

40: Anolyte chamber

43: Anolyte input port

44: Anolyte feed

45: Anolyte output port

46: Anolyte and anolyte liquid products

54: Anode feed (gas)

56: Anode discharging

Figure 1 is a schematic cross-sectional view of the first embodiment of the electrochemical treatment equipment for reducing carbon dioxide according to the present invention.

Figure 2 is a schematic cross-sectional view of the second embodiment of the electrochemical treatment equipment for reducing carbon dioxide according to the present invention.

Figure 3 is a block diagram of a first embodiment of a system including an electrochemical device for reducing carbon dioxide according to the present invention.

Figure 4 is a block diagram of a second embodiment of a system including an electrochemical device for reducing carbon dioxide according to the present invention.

FIG. 5 is a block diagram of a third embodiment of a system including an electrochemical device for reducing carbon dioxide according to the present invention.

Figure 6 is a block diagram of a fourth embodiment of a system including an electrochemical device for reducing carbon dioxide according to the present invention.

The implementation method of the electrochemical treatment equipment and system for reducing carbon dioxide of the present invention will be described below through specific embodiments. Those skilled in the art can understand the advantages and effects of the present invention from the content disclosed herein. The present invention can be realized through other specific embodiments or Applications, various details can be modified and changed based on different viewpoints and applications without departing from the concept of the present invention. The drawings of the present invention are only simple illustrations and are not drawn according to actual sizes. Specific details may be exaggerated for convenience of explanation. The term "or" used in this article shall include any one or more combinations of the associated listed items, as appropriate.

Figure 1 is a schematic cross-sectional view of the first embodiment of the electrochemical treatment equipment for reducing carbon dioxide according to the present invention. Referring to FIG. 1 , an electrochemical treatment device 2 for reducing carbon dioxide includes a cathode chamber 10 , a cathode electrode 12 , a cathode electrolyte chamber 11 , an isolation unit 30 , an anode electrode 22 , and an anode chamber 20 .

Still referring to Figure 1, the cathode chamber 10 has a cathode gas input port 13 and a cathode gas output port 15, both of which are located at appropriate positions of the cathode chamber 10 for external connection to other components, structures, equipment or devices without As shown in the figure, the cathode chamber 10 can be connected to pipelines, components, equipment or devices that input gas feed through the cathode gas input port 13 .

As shown in Figure 1, in the cathode chamber 10 of this embodiment, carbon dioxide enters the cathode chamber 10 through the cathode gas input port 13. The carbon dioxide here can be a gas including carbon dioxide. The concentration of the carbon dioxide gas is, for example, but not limited to The volume percentage is limited to 0.01-100, and the gas used for dilution can be nitrogen, argon, etc. The phase of the carbon dioxide gas feed 14 here is mainly gas phase. It should be noted that the cathode gas input port 13 of the present invention is mainly used to feed cathode gas. However, it is undeniable that in actual operation, the cathode feed gas may contain a very small amount of moisture, but this is not the case. The technical core claimed by the invention. Therefore, regarding the cathode gas feed in the cathode gas input port 13, it is not a limitation that the cathode gas feed of the present invention must not contain liquid phase moisture, but the carbon dioxide gas feed of the present invention enters the reduction equipment in the gas phase for electrolysis. Learn to react. Secondly, during the electrolysis reaction, the carbon dioxide entering the cathode chamber 10 from the cathode gas input port 13 can be reduced to carbon monoxide on the cathode electrode 12, or other product gases, such as methane, ethane, ethylene, and formic acid, The aforementioned combinations such as methanol or ethanol, and carbon monoxide, other product gases, non-reactive gases, unused carbon dioxide, or some or all of the aforementioned gases, can form a mixed gas 16 with carbon dioxide reduction products.

As still shown in Figure 1, in the cathode chamber 10 of this embodiment, a mixed gas 16 of carbon dioxide reduction products is generated. The mixed gas 16 can leave the cathode chamber 10 through the cathode gas output port 15, and the cathode The gas output port 15 can be externally connected to a pipeline, so the mixed gas 16 containing the carbon dioxide reduction product is transported by the pipeline to other units, equipment or devices for further processing. It should be noted that, The mixed gas 16 with carbon dioxide reduction products of the present invention is also based on the gas phase discharge of the mixed gas, but it is not limited to the existence of only the gas phase. In actual operation, it may be different due to operating conditions or environmental parameters. There is very little liquid moisture present in the mixed gas 16 with carbon dioxide reduction products, or water vapor and moisture reach gas-liquid equilibrium, both of which will appear in the mixed gas 16 with carbon dioxide reduction products. Therefore, the cathode chamber 10 of the present invention is set as a space to provide cathode electrolysis reaction. It may have one or more input ports and one or more output ports to provide cathode reactants and cathode electrolyte in and out. and stay.

Continuing to refer to FIG. 1 , the cathode electrode 12 is disposed between the cathode chamber 10 and the cathode electrolyte chamber 11 . In the embodiment of the present invention, the cathode electrode 12 is conducive to the reduction reaction of the gas phase reactant carbon dioxide, such as a porous electrode. Secondly, the cathode electrode 12 may further include one or more cathode catalysts, such as gold, silver, zinc, copper, bismuth, tin, or other metals or metal single atom catalysts or various combinations of the foregoing, and the cathode catalysts are arranged in an appropriate manner. The cathode electrode 12 is connected by, for example but not limited to, physical or chemical adsorption, or chemical bonding.

As shown in FIG. 1 , the cathode electrode 12 is disposed between the cathode chamber 10 and the cathode electrolyte chamber 11 , that is, the cathode electrolyte chamber 11 is adjacent to the cathode chamber 10 with the cathode electrode 12 . The cathode electrode 12 can be used as a gas-liquid separation interface to separate the gas-liquid phase of the gas phase and liquid phase carbon dioxide reduction products produced by the cathode electrolysis reaction. Therefore, the cathode electrode 12 allows the cathode electrolyte chamber 11 and the cathode chamber 10 to each have their own input port and output port. Therefore, the products of different phases produced after the cathode electrolysis reaction can be directly separated and left the cathode chamber 10 through their respective output ports, which has the effect of reducing the cost of separating the products and improving the purity of the products.

Continuing to refer to Figure 1, the cathode electrolyte chamber 11 includes a cathode electrolyte input port 33 and a liquid output port 35, and the catholyte input port 33 and the liquid output port 35 are respectively located at appropriate positions in the cathode electrolyte chamber 11, The cathode electrolyte chamber 11 is connected to other components, structures, equipment or devices without limitation as shown in the figure, and the cathode electrolyte chamber 11 is adjacent to the cathode chamber 10 with the cathode electrode 12 . Catholyte feed 34 series from The catholyte input port 33 enters the cathode electrolyte chamber 11, and after participating in the reaction, leaves the cathode electrolyte chamber 11 through the liquid output port 35. The catholyte feed 34 is a liquid phase, and the liquid product 36 includes catholyte and cathode liquid products, low carbon number alcohols, acids, urea, etc., wherein the cathode liquid product can be a single or mixed product.

Please refer to FIG. 1 . The cathode electrolyte used in the cathode electrolyte chamber 11 may include the following cathode electrolytes, including, but not limited to, sodium hydroxide, sodium bromide, sodium bicarbonate, and sodium sulfate. , sodium phosphate, sodium hydrogen phosphate, lithium hydroxide, lithium bromide, lithium hydrogen carbonate, lithium sulfate, lithium phosphate, lithium hydrogen phosphate, potassium hydroxide, potassium bromide, potassium hydrogen carbonate, potassium sulfate, potassium phosphate, potassium hydrogen phosphate, Or an electrolyte solution that is a combination of any two or more of the above. Anolyte, for example but not limited to, sodium hydroxide, sodium bromide, sodium bicarbonate, sodium sulfate, sodium phosphate, sodium hydrogenphosphate, lithium hydroxide, lithium bromide, lithium bicarbonate, lithium sulfate, lithium phosphate, phosphoric acid An aqueous electrolyte solution of lithium hydrogen, potassium hydroxide, potassium bromide, potassium bicarbonate, potassium sulfate, potassium phosphate, potassium hydrogen phosphate, urea, potassium chloride, sodium chloride, or any combination thereof. Solid electrolytes can include polymer solid electrolytes, inorganic solid electrolytes, organic and inorganic composite solid electrolytes, and colloidal electrolytes.

As shown in Figure 1, the isolation unit 30 of this embodiment is adjacent to the cathode electrolyte chamber 11, and the present invention uses the isolation unit 30 to block the materials in the two chambers to a limited extent, preventing direct exchange of materials, and at the same time allowing ions flow to maintain the electrical neutral balance required for the operation of the electrolyzer, where the isolation unit 30 can be a porous ceramic, a bipolar membrane (Bipolar Membrane), anion, and cation semipermeable membranes. According to the foregoing, when the carbon dioxide feed is carbon dioxide gas, the problem of poor solubility of carbon dioxide in general catholyte can be avoided, thereby increasing the reactant concentration and thereby increasing the reactivity (high current density). Mainly because the function of the gas diffusion electrode is to increase the concentration of reactants, thereby increasing reactivity (high current density). Secondly, the arrangement method of the present invention can effectively reduce the distance between electrodes and reduce the resistance, thereby reducing the resistance of the reaction tank to improve the stability of the electrodes and high current density. Therefore, reducing the distance between electrodes is also the electrode arrangement method used in the present invention.

Continuing to refer to FIG. 1 , the anode electrode 22 of this embodiment is adjacent to the isolation unit 30 , and the anode electrode 22 may include one or more anode catalysts, such as, but not limited to, ruthenium, iridium, titanium, nickel, iron, and cobalt. , platinum and other metals or combinations of the above, the anodic oxidation reactions that can be performed include oxygen evolution reaction (Oxygen Evolution Reaction, OER), chlorine evolution reaction (Chlorine Evolution Reaction, CER) or urea oxidation reaction (Urea Oxidation Reaction, UOR), Oxygen Reduction Reaction, phenol oxidation reaction or organic pollutant oxidation reaction.

As shown in Figure 1, the anode electrode 22 in the embodiment of the present invention may further include adding one or more anode catalysts and disposing them on the anode electrode 22 in an appropriate manner, for example but not limited to, such as physical or chemical adsorption or Chemical bonding. Furthermore, the preparation method of the cathode electrode 12 or the anode electrode 22 is, for example but not limited to, a porous electrode of metal material or a metal modified by coating, chemical deposition, physical deposition, electroplating or electroless plating. As for the porous electrode material, the metal is the same as the metal used for the aforementioned catalyst. The porous electrode material can be a conductive composite of polytetrafluoroethylene, polypropylene, polyethylene and a conductor, or a porous carbon material.

As shown in FIG. 1 , the anode electrode 22 of the present invention can provide the function of anodic electrolysis reaction, and its anode chamber 20 can have one or more input ports and one or more output ports to provide anode reactants and anolyte. Enter, exit and stay. When the anode electrolyte is a liquid, the anode electrode 22 can split-flow the gas and liquid of the anodic electrolysis reaction. Therefore, the products of different phases produced after the anodic electrolysis reaction can be directly separated from The respective output ports leave the anode chamber 20, which has the effect of reducing the cost of separation products and improving the purity of the products. Without limitation, the anode electrode 22 may also be disposed on the boundary of the space (the anode chamber 20 ), so that the anode reactant and the anolyte can enter the anode chamber 20 together.

Referring again to FIG. 1 , the anode chamber 20 includes an anode input port 23 and an anode output port 25 . The anode chamber 20 is connected to the liquid (gas) feed pipeline, component, equipment or device through the anode input port 23. The anode input port 23 and the anode output port 25 are respectively located at appropriate positions of the anode chamber 20, so as to External connections to other components, structures, equipment or devices are not limited to those shown in the figure, and the anolyte and anode An anode output 26 of product may exit the anode chamber 20 from the anode output port 25 , which may include a liquid-gas two-phase anolyte and an anode product, where the anode product may be a single or mixed product.

As shown in Figure 1, the cathode electrode and anode electrode of the present invention are porous electrodes or gas diffusion electrodes. The materials of the porous electrodes at least include conductive materials mixed with polytetrafluoroethylene, polypropylene, polyethylene and conductors. Composite, conductive polymer, porous carbon material, and porous metal material, wherein the metal is modified on the porous material by chemical deposition method, physical deposition method, electroplating method, and electroless plating method to become a porous metal material , or a material selected from a combination of at least any two of the aforementioned groups to serve as a porous electrode. Secondly, the metal system consists of vanadium, chromium, manganese, iron, cobalt, nickel, copper, tin, zirconium, niobium, molybdenum, ruthenium, rhodium, palladium, silver, cadmium, hafnium, tantalum, tungsten, rhenium, iridium, platinum, gold , aluminum, indium, titanium, lead, bismuth, antimony, tellurium, lanthanum, cerium, neodymium, and combinations thereof.

Referring to FIG. 1 , the cathode electrode 12 , the isolation unit 30 and the anode electrode 22 of the present invention basically extend on any cross-section of the body of the electrochemical treatment device 2 for reducing carbon dioxide. In addition, the positions of the cathode gas input port 13, cathode gas output port 15, anode input port 23, anode output port 25, cathode electrolyte input port 33, and liquid output port 35 on the body in Figure 1 are only for convenience of illustration. It can be adjusted according to the actual application and is not intended to limit the relative positions of each chamber and each port of the present invention.

Continuing to refer to Figure 1, in the electrolysis reaction of the present invention, an anode feed 24 (liquid) including anolyte and anode reactants contacts the anode electrode 22 and is electrolyzed to generate anode products, such as, but not limited to, oxygen, carbon dioxide. , nitrogen, chlorine, or a combination of the above.

Still as shown in Figure 1, in the electrolysis reaction of the present invention, carbon dioxide will be electrically reduced to generate different carbon dioxide reduction products, and the design of the present invention can enable the cathode products to be formed at the gas/liquid interface according to different physical and chemical properties. In order to achieve the liquid-gas diversion effect.

Figure 2 is a schematic cross-sectional view of the second embodiment of the electrochemical treatment equipment for reducing carbon dioxide according to the present invention. The difference between Figure 1 and Figure 2 is that the electrochemical treatment equipment for reducing carbon dioxide in Figure 2 The device 4 includes the following, respectively: a cathode chamber 10, a cathode electrode 12, a cathode electrolyte chamber 11, an isolation unit 30, an anode electrolyte chamber 40, an anode electrode 22, and an anode chamber 21.

Still referring to Figure 2, the cathode chamber 10 has a cathode gas input port 13 and a cathode gas output port 15, both of which are located at appropriate positions of the cathode chamber 10 for external connection to other components, structures, equipment or devices without As shown in the figure, the cathode chamber 10 can be connected to pipelines, components, equipment or devices that input gas feed through the cathode gas input port 13 .

As shown in Figure 2, in the cathode chamber 10 of this embodiment, carbon dioxide enters the cathode chamber 10 through the cathode gas input port 13. The carbon dioxide here can be a gas including carbon dioxide. The concentration of the carbon dioxide gas is, for example, but not limited to The volume percentage is limited to 0.01-100, and the gas used for dilution can be nitrogen, argon, etc. The phase of the carbon dioxide gas feed 14 here is mainly gas phase. It should be noted that the cathode gas input port 13 of the present invention is mainly used to feed cathode gas. However, it is undeniable that in actual operation, the cathode feed gas may contain a very small amount of moisture, but this is not the case. The technical core claimed by the invention. Therefore, regarding the cathode gas feed in the cathode gas input port 13, it is not a limitation that the cathode gas feed of the present invention must not contain liquid phase moisture, but the carbon dioxide gas feed of the present invention enters the reduction equipment in the gas phase for electrolysis. Learn to react. Secondly, during the electrolysis reaction, the carbon dioxide entering the cathode chamber 10 from the cathode gas input port 13 can be reduced to carbon monoxide on the cathode electrode 12, or other product gases, such as methane, ethane, ethylene, and formic acid, The aforementioned combinations such as methanol or ethanol, and carbon monoxide, other product gases, non-reactive gases, unused carbon dioxide, or some or all of the aforementioned gases, can form a mixed gas 16 with carbon dioxide reduction products.

As still shown in Figure 2, in the cathode chamber 10 of this embodiment, a mixed gas 16 of carbon dioxide reduction products will be generated. The mixed gas 16 can leave the cathode chamber 10 through the cathode gas output port 15, and the cathode The gas output port 15 can be externally connected to a pipeline, so the mixed gas 16 containing the carbon dioxide reduction product is transported by the pipeline to other units, equipment or devices for further processing. It should be noted that the mixed gas 16 with carbon dioxide reduction products of the present invention is also based on the gas phase discharge of the mixed gas. Mainly, but it is not limited to the existence of only the gas phase. In actual operation, there may be very little liquid moisture present in the mixed gas with carbon dioxide reduction products 16, or water vapor and moisture due to operating conditions or environmental parameters. The situation of reaching gas-liquid equilibrium will occur in mixed gases 16 with carbon dioxide reduction products. Therefore, the cathode chamber 10 of the present invention is set as a space to provide cathode electrolysis reaction. It may have one or more input ports and one or more output ports to provide cathode reactants and cathode electrolyte in and out. and stay.

Continuing to refer to FIG. 2 , the cathode electrode 12 is disposed between the cathode chamber 10 and the cathode electrolyte chamber 11 . In the embodiment of the present invention, the cathode electrode 12 is conducive to the reduction reaction of the gas phase reactant carbon dioxide, such as a porous electrode. Secondly, the cathode electrode 12 may further include one or more cathode catalysts, such as gold, silver, zinc, copper, bismuth, tin, or other metals or metal single atom catalysts or various combinations of the foregoing, and the cathode catalysts are arranged in an appropriate manner. The cathode electrode 12 is connected by, for example but not limited to, physical or chemical adsorption, or chemical bonding.

As still shown in FIG. 2 , the cathode electrode 12 is disposed between the cathode chamber 10 and the cathode electrolyte chamber 11 , that is, the cathode electrolyte chamber 11 is adjacent to the cathode chamber 10 with the cathode electrode 12 . The cathode electrode 12 can be used as a gas-liquid separation interface to separate the gas-liquid phase of the gas phase and liquid phase carbon dioxide reduction products produced by the cathode electrolysis reaction. Therefore, the cathode electrode 12 allows the cathode electrolyte chamber 11 and the cathode chamber 10 to each have their own input port and output port. Therefore, the products of different phases produced after the cathode electrolysis reaction can be directly separated and left the cathode chamber 10 through their respective output ports, which has the effect of reducing the cost of separating the products and improving the purity of the products.

Continuing to refer to Figure 2, the cathode electrolyte chamber 11 includes a cathode electrolyte input port 33 and a liquid output port 35, and the catholyte input port 33 and the liquid output port 35 are respectively located at appropriate positions in the cathode electrolyte chamber 11, The cathode electrolyte chamber 11 is connected to other components, structures, equipment or devices without limitation as shown in the figure, and the cathode electrolyte chamber 11 is adjacent to the cathode chamber 10 with the cathode electrode 12 . The catholyte feed 34 is from the catholyte input port 33 and enters the cathode chamber 11. After participating in the reaction, it is sent from the liquid output port 35 Exit the cathode electrolyte chamber 11. The catholyte feed 34 is a liquid phase, and the liquid product 36 includes catholyte and cathode liquid products, low carbon number alcohols, acids, urea, etc., wherein the cathode liquid product can be a single or mixed product.

Please refer to FIG. 2 . The cathode electrolyte used in the cathode electrolyte chamber 11 may include the following cathode electrolytes, including, but not limited to, sodium hydroxide, sodium bromide, sodium bicarbonate, and sodium sulfate. , sodium phosphate, sodium hydrogen phosphate, lithium hydroxide, lithium bromide, lithium hydrogen carbonate, lithium sulfate, lithium phosphate, lithium hydrogen phosphate, potassium hydroxide, potassium bromide, potassium hydrogen carbonate, potassium sulfate, potassium phosphate, potassium hydrogen phosphate, Or an electrolyte solution that is a combination of any two or more of the above. Anolyte, for example but not limited to, sodium hydroxide, sodium bromide, sodium bicarbonate, sodium sulfate, sodium phosphate, sodium hydrogenphosphate, lithium hydroxide, lithium bromide, lithium bicarbonate, lithium sulfate, lithium phosphate, phosphoric acid An aqueous electrolyte solution of lithium hydrogen, potassium hydroxide, potassium bromide, potassium bicarbonate, potassium sulfate, potassium phosphate, potassium hydrogen phosphate, urea, potassium chloride, sodium chloride, or any combination thereof. Solid electrolytes can include polymer solid electrolytes, inorganic solid electrolytes, organic and inorganic composite solid electrolytes, and colloidal electrolytes.

As shown in FIG. 2 , the isolation unit 30 of this embodiment is adjacent to the cathode electrolyte chamber 11 , and the isolation unit 30 may be a porous ceramic, a bipolar membrane (Bipolar Membrane), anion, or cation semipermeable membrane. According to the foregoing, when the carbon dioxide feed is carbon dioxide gas, the problem of poor solubility of carbon dioxide in general catholyte can be avoided, thereby increasing the reactant concentration and thereby increasing the reactivity (high current density). Mainly because the function of the gas diffusion electrode is to increase the concentration of reactants, thereby increasing reactivity (high current density). Secondly, the arrangement method of the present invention can effectively reduce the distance between electrodes and reduce the resistance, thereby reducing the resistance of the reaction tank to improve the stability of the electrodes and high current density. Therefore, reducing the distance between electrodes is also the electrode arrangement method used in the present invention.

Referring to FIG. 2 , the isolation unit 30 is disposed between the cathode electrolyte chamber 11 and the anode electrolyte chamber 40 . Therefore, the isolation unit 30 is adjacent to the anode electrolyte chamber 40 , that is, the anode electrolyte chamber 40 is isolated. Unit 30 is adjacent to this cathode electrolyte chamber 11 . The present invention isolates the cathode through the isolation unit 30 The electrolyte chamber 11 and the anode electrolysis chamber 40 are used to isolate the materials in the two chambers to a limited extent, preventing direct exchange of materials, and at the same time allowing the flow of ions to maintain the electrically neutral balance required for the operation of the electrolyzer.

As shown in FIG. 2 , the anode electrolyte chamber 40 has an anolyte input port 43 and an anolyte output port 45 . The anode electrolyte chamber 40 is adjacent to the anode chamber 21 with the anode electrode 22 . The anolyte feed 44 enters the anode electrolyte chamber 40 through the anolyte input port 43, becomes an anolyte and anode liquid product 46 after participating in the reaction, and leaves the anode electrolyte chamber 40 through the anolyte output port 45. Therefore, in addition to the cathode chamber 10, the anode chamber 21 also adopts a gas-liquid split design to directly separate products of different phases. In addition to reducing the cost of separation, it can also improve the purity of the product. According to the above, for a few examples of products that are difficult to separate directly, for example, the alkaline substances produced by the cathode react with the remaining CO ₂ to cause product loss. Through the gas-liquid split design of the present invention, the products that are originally difficult to separate can be effectively separated. separation.

Continuing to refer to FIG. 2 , the anode electrode 22 of this embodiment is adjacent to the anode electrolyte chamber 40 , and the anode electrode 22 may include one or more anode catalysts, such as, but not limited to, ruthenium, iridium, titanium, nickel, and iron. , cobalt, platinum and other metals or a combination of the above, the anodic oxidation reactions that can be performed include oxygen evolution reaction (Oxygen Evolution Reaction, OER), chlorine evolution reaction (Chlorine Evolution Reaction, CER) or urea oxidation reaction (Urea Oxidation Reaction, UOR ), oxygen reduction reaction (Oxygen Reduction Reaction), phenol oxidation reaction or organic pollutant oxidation reaction.

As shown in Figure 2, the anode electrode 22 in the embodiment of the present invention may further include adding one or more anode catalysts and disposing them on the anode electrode 22 in an appropriate manner, for example but not limited to, such as physical or chemical adsorption or Chemical bonding. Furthermore, the preparation method of the cathode electrode 12 or the anode electrode 22 is, for example but not limited to, a porous electrode of metal material or a metal modified by coating, chemical deposition, physical deposition, electroplating or electroless plating. As for the porous electrode material, the metal is the same as the metal used for the aforementioned catalyst. The porous electrode material can be a conductive composite of polytetrafluoroethylene, polypropylene, polyethylene and a conductor, or a porous carbon material.

As shown in Figure 2, the anode electrode 22 of the present invention can provide the function of anode electrolysis reaction. The anode electrode 22 is disposed between the anode electrolyte chamber 40 and the anode chamber 21. It can have one or more input ports and an or multiple output ports to provide the anode reactant and the anolyte to enter and stay. When the anode electrolyte is a liquid, the anode electrode 22 can split-flow the gas-liquid reaction of the anode electrolysis reaction, and the anode electrolyte chamber Chamber 40 and anode chamber 21 may each be provided with their own input and output ports. Therefore, the products of different phases produced after the anodic electrolysis reaction can be directly separated and left the anode chamber 21 through their respective output ports, which has the effect of reducing the cost of separating the products and improving the purity of the products. Without limitation, the anode electrode 22 may also be disposed on the boundary of the space (the anode chamber 21 ), so that the anode reactant and the anolyte can enter the anode chamber 21 together.

As shown in Figure 2, the anode chamber 21 of the present invention has an anode input port 23 and an anode output port 25, wherein the anode feed 54 (gas) includes anode gas reactants, and the anode discharge 56 includes anode gas products. Referring again to FIG. 2 , the anode chamber 21 includes an anode input port 23 and an anode output port 25 . The anode chamber 21 is connected to the liquid (gas) feed pipeline, component, equipment or device through the anode input port 23. The anode input port 23 and the anode output port 25 are respectively located at appropriate positions of the anode chamber 21, so as to Externally connected to other components, structures, equipment or devices without being limited by the drawings, the anode discharge 26 of the anolyte and anode product can leave the anode chamber 21 from the anode output port 25, which can include liquid and gas. Phase anolyte and anode product, where the anode product can be a single or mixed product.

The schematic cross-sectional view of the first embodiment of the electrochemical treatment equipment for reducing carbon dioxide in Figure 1 and the schematic cross-sectional view of the second embodiment of the electrochemical treatment equipment for reducing carbon dioxide in Figure 2 of the present invention include the cathode electrode and the anode described below. The electrode is a porous electrode or a gas diffusion electrode. The material of the porous electrode at least includes polytetrafluoroethylene, polypropylene, a conductive composite of polyethylene and a conductor, conductive polymer, porous carbon material, and porous A porous metal material, in which the metal is modified on the porous material by a chemical deposition method, a physical deposition method, an electroplating method, and an electroless plating method to become a porous metal material, or a combination selected from at least any two of the aforementioned groups materials as porous electrical Extremely. Secondly, the metal system consists of vanadium, chromium, manganese, iron, cobalt, nickel, copper, tin, zirconium, niobium, molybdenum, ruthenium, rhodium, palladium, silver, cadmium, hafnium, tantalum, tungsten, rhenium, iridium, platinum, gold , aluminum, indium, titanium, lead, bismuth, antimony, tellurium, lanthanum, cerium, neodymium, and combinations thereof.

In the schematic cross-sectional view of the first embodiment of the electrochemical treatment equipment for reducing carbon dioxide in Figure 1 and the schematic cross-sectional view of the second embodiment of the electrochemical treatment equipment for reducing carbon dioxide in Figure 2 of the present invention, the cathode catalyst described below is included. and an anode catalyst, which may be a metal, a metal compound, an alloy, a carbon compound containing at least one of heteroatoms or metals, or a combination of any two or more of the above. Metals can be vanadium, chromium, manganese, iron, cobalt, nickel, copper, tin, zirconium, niobium, molybdenum, ruthenium, rhodium, palladium, silver, cadmium, hafnium, tantalum, tungsten, rhenium, iridium, platinum, gold, aluminum , indium, titanium, lead, bismuth, antimony, tellurium, lanthanum, cerium, neodymium or combinations thereof. Metal compounds include organic metal compounds and inorganic metal compounds, and include metal halides, metal oxides, metal hydroxides, metal sulfides or metal nitrides. The carbon compound containing at least one of heteroatoms or metals can be a structure composed of nitrogen- or sulfur-containing graphite, graphene, or carbon materials such as carbon tubes and metal atoms.

In addition, the schematic cross-sectional view of the first embodiment of the electrochemical treatment equipment for reducing carbon dioxide in Figure 1 and the schematic cross-sectional view of the second embodiment of the electrochemical treatment equipment for reducing carbon dioxide in Figure 2 of the present invention include the cathode electrolyte chamber of Figure 1 chamber, as well as the cathode electrolyte chamber or anode electrolyte chamber in Figure 2. The aforementioned cathode electrolyte chamber and anode electrolyte chamber are used as a place to provide conductive substances for the purpose of conducting electricity. It can be a space that allows the electrolyte to In and out and through or stay, solid-state electrolyte (solid-state electrolyte) can also be disposed or filled therein, or electrolytes including both solid and liquid phases can be included. In a manner that allows electrolyte to enter, exit, and stay, the aforementioned cathode electrolyte chamber and anode electrolyte chamber may have one or more electrolyte input ports and one or more electrolyte output ports. Secondly, the present invention may include one or more cathode electrolyte chambers and an anode electrolyte chamber, and the cathode electrolyte chamber and the anode electrolyte chamber can be isolated by the isolation unit, thereby limiting the isolation of the cathode electrolyte chamber. The anode electrolyte chamber, as well as the materials in the anode electrolyte chamber, prevent direct exchange of materials between chambers while allowing the flow of ions to maintain the electrically neutral balance required for electrolytic cell operation.

In the schematic cross-sectional view of the first embodiment of the electrochemical treatment equipment for reducing carbon dioxide of the present invention in Figure 1, and the schematic cross-sectional view of the second embodiment of the electrochemical treatment equipment for reducing carbon dioxide in Figure 2, the method of reducing carbon dioxide according to the present invention A system of electrochemical treatment equipment includes a plurality of the same or different electrochemical treatment equipment for reducing carbon dioxide, and the different electrochemical treatment equipment for reducing carbon dioxide refers to the cathode chamber and anode chamber as shown in Figures 1 and 2. and electrolyte chambers may have different configurations. In Figure 1, the anode electrode is disposed on the boundary of the anode chamber space, so that the anode electrode 22 can be close to the isolation unit 30, shortening the distance between the cathode electrode 12 and the anode electrode 22, which can be beneficial to the reaction. conduct.

3 and 4 are respectively block diagrams of the first and second embodiments of the system including the electrochemical device for reducing carbon dioxide according to the present invention. Please refer to Figure 1 and Figure 3 at the same time. The system of the present invention including electrochemical equipment for reducing carbon dioxide can be implemented by connecting a plurality (only two are shown in the figure) of electrochemical treatment equipment 2 for reducing carbon dioxide in series. Each output The product output from the port can be used as feed material for the next connected electrochemical treatment device 2 for reducing carbon dioxide. Please refer to Figure 1 and Figure 4 at the same time. The system including electrochemical equipment for reducing carbon dioxide can be realized by connecting a plurality (only two are shown in the figure) of electrochemical treatment equipment 2 for reducing carbon dioxide in parallel. The feed system is through each The input port enters the electrochemical treatment equipment 2 for reducing carbon dioxide, and the product or discharge (not shown in the figure) output from the output port of each electrochemical treatment equipment 2 for reducing carbon dioxide is transported to the subsequent unit (not shown in the figure) ) for further processing.

5 and 6 are block diagrams of third and fourth embodiments of a system including an electrochemical device for reducing carbon dioxide, respectively, according to the present invention. Please refer to Figure 2 and Figure 5 at the same time. The system of the present invention including electrochemical equipment for reducing carbon dioxide can be realized by connecting a plurality (only two are shown in the figure) of electrochemical treatment equipment 4 for reducing carbon dioxide in series. Each output The product output from the port can be used as feed material for the next connected electrochemical treatment device 2 for reducing carbon dioxide. Please refer to both Figure 2 and Figure 6, including reduction of carbon dioxide The system of electrochemical equipment can be realized by connecting a plurality (only two are shown in the figure) of electrochemical treatment equipment 4 for reducing carbon dioxide in parallel. The feed enters the electrochemical treatment equipment 4 for reducing carbon dioxide through each input port, and The product or output (not shown in the figure) output from the output port of each electrochemical treatment device 4 for reducing carbon dioxide is transported to a subsequent unit (not shown in the figure) for further processing. In other words, an electrochemical treatment equipment system for reducing carbon dioxide according to the present invention includes a plurality of electrochemical treatment equipment for reducing carbon dioxide connected to each other in series or in parallel, or in any combination of series and parallel.

Based on the above, an electrochemical treatment device for reducing carbon dioxide according to the present invention at least includes: a cathode chamber, including a cathode gas input port, and a cathode gas output port, wherein the carbon dioxide gas feed enters the cathode chamber from the cathode gas input port, The mixed gas with the carbon dioxide reduction product leaves the cathode chamber from the cathode gas output port; the cathode electrolyte chamber allows the cathode electrolyte to pass or stay, wherein the cathode electrode is disposed between the cathode chamber and the cathode electrolyte chamber, and the cathode electrode is reduced Carbon dioxide gas is fed to form a mixed liquid with carbon dioxide reduction products, the cathode electrolyte chamber is adjacent to the cathode chamber with the cathode electrode; an isolation unit; and an anode chamber, the isolation unit separates the anode chamber, the cathode electrolyte chamber, and the anode chamber The chamber includes an anode input port, an anode output port, and an anode electrode. The anode chamber is adjacent to the isolation unit with the anode electrode, and the isolation unit is adjacent to the cathode electrolyte chamber. The anode feed enters the anode chamber from the anode input port and contacts the anode electrode. The anode feed is liquid, and the anode discharge leaves the anode chamber from the anode output port.

In addition, an electrochemical treatment device for reducing carbon dioxide according to the present invention at least includes: a cathode chamber, including a cathode gas input port, and a cathode gas output port, wherein the carbon dioxide gas feed enters the cathode chamber from the cathode gas input port, with carbon dioxide The mixed gas of the reduction product leaves the cathode chamber from the cathode gas output port; a cathode electrolyte chamber that allows the cathode electrolyte to pass or stay, wherein the cathode electrode is disposed between the cathode chamber and the cathode electrolyte chamber, and the cathode electrode reduces carbon dioxide gas Feed, forming a mixed gas with carbon dioxide reduction products, the cathode electrolyte chamber is adjacent to the cathode chamber with the cathode electrode; the isolation unit; the anode electrolyte chamber, the anode electrolyte chamber and the cathode are separated by the isolation unit The anode electrolyte chamber has an anode electrolyte input port and an anode electrolyte output port, wherein the anolyte feed enters the anode electrolyte chamber from the anode electrolyte input port, and the anolyte discharge is discharged by the anode electrolyte The liquid output port leaves the anode electrolyte chamber; and the anode chamber includes an anode input port, an anode output port and an anode electrode. The anode electrode is disposed between the anode chamber and the anode electrolyte chamber, and the anode electrolyte chamber is between the isolation unit and the anode electrolyte chamber. Between the anode electrodes, the anode feed enters the anode chamber from the anode input port to contact the anode electrode, the anode feed is gas, and the anode discharge leaves the anode chamber from the anode output port.

The industrial advantage of the electrochemical treatment equipment for reducing carbon dioxide of the present invention is that the electrode configuration method of the present invention can effectively reduce the distance between the electrodes, thereby reducing the resistance of the reaction tank, thereby achieving the effect of reducing the resistance, relatively Improve electrode stability and high current density. In addition, the industrial advantage of the electrochemical treatment equipment for reducing carbon dioxide of the present invention is that when the feed of carbon dioxide is carbon dioxide gas, the problem of poor solubility of carbon dioxide in general catholyte can be avoided, and the carbon dioxide can be passed through the electrode as a When used as a cathode/anode electrode, it can increase the concentration of reactants, because it has a high current density at this time, so it can further increase the reactivity. In addition, the biggest advantage of this technology is that both the cathode and anode chambers can use gas-liquid split-flow to directly separate products of different phases. This can not only reduce the cost of separation, but also improve the purity of the product.

The above descriptions are only preferred embodiments of the present invention and are not intended to limit the patentable scope of the present invention; all other equivalent changes or modifications made without departing from the spirit disclosed in the present invention shall be included in the following within the scope of the patent application.

2: Electrochemical treatment equipment for reducing carbon dioxide

10:Cathode chamber

11:Cathode electrolyte chamber

12:Cathode electrode

13:Cathode gas input port

14: Carbon dioxide gas feed

15:Cathode gas output port

16: Mixed gas with carbon dioxide reduction products

20:Anode chamber

22:Anode electrode

23:Anode input port

24:Anode feed

25:Anode output port

26: Anode discharging

30:Isolation unit

33:Cathode electrolyte input port

34: Catholyte feed

35:Liquid output port

36: Liquid products

Claims (19)

An electrochemical treatment device for reducing carbon dioxide, containing at least: A cathode chamber includes a cathode gas input port and a cathode gas output port, wherein carbon dioxide gas feed enters the cathode chamber from the cathode gas input port, and a mixed gas with carbon dioxide reduction products is output from the cathode gas port exiting the cathode chamber; A cathode electrolyte chamber that allows a cathode electrolyte to pass or stay, wherein the cathode electrode is disposed between the cathode chamber and the cathode electrolyte chamber, and the cathode electrode reduces the carbon dioxide gas feed to form the carbon dioxide reduction product mixed liquid, the cathode electrolyte chamber is adjacent to the cathode chamber with a cathode electrode; an isolation unit; and An anode chamber, the isolation unit separates the anode chamber and the cathode electrolyte chamber, the anode chamber includes an anode input port, an anode output port, and an anode electrode, the anode chamber is adjacent to the anode electrode An isolation unit is attached, the isolation unit is adjacent to the cathode electrolyte chamber, in which an anode feed enters the anode chamber from the anode input port to contact the anode electrode, the anode feed is liquid, and an anode discharge comes from the The anode output port exits the anode chamber. An electrochemical treatment device for reducing carbon dioxide, containing at least: A cathode chamber, including a cathode gas input port and a cathode gas output port, wherein carbon dioxide gas feed enters the cathode chamber from the cathode gas input port, and a mixed gas with carbon dioxide reduction products flows from the cathode gas output port exit the cathode chamber; A cathode electrolyte chamber that allows a cathode electrolyte to pass or stay, wherein the cathode electrode is disposed between the cathode chamber and the cathode electrolyte chamber, and the cathode electrode reduces the dioxide Carbon gas is fed to form the mixed gas with carbon dioxide reduction products, and the cathode electrolyte chamber is adjacent to the cathode chamber with a cathode electrode; an isolation unit; An anode electrolyte chamber, using the isolation unit to separate the anode electrolyte chamber and the catholyte chamber, the anode electrolyte chamber has an anolyte input port and an anolyte output port, wherein an anolyte Feed enters the anode electrolyte chamber from the anolyte input port, and an anolyte discharge exits the anode electrolyte chamber from the anolyte output port; and An anode chamber includes an anode input port, an anode output port and an anode electrode. The anode electrode is disposed between the anode chamber and the anode electrolyte chamber. The anode electrolyte chamber is between the isolation unit and the anode electrolyte chamber. Between the anode electrodes, an anode feed enters the anode chamber from the anode input port to contact the anode electrode, the anode feed is gas, and an anode discharge leaves the anode chamber from the anode output port. The electrochemical treatment equipment for reducing carbon dioxide as described in claim 1 and claim 2, wherein the isolation unit is composed of a porous ceramic semipermeable membrane, a bipolar membrane, an anion semipermeable membrane, and a cation semipermeable membrane. Selected from the group of membranes. The electrochemical equipment according to claim 1 and claim 2 further includes a catalyst disposed on at least one of the cathode electrode and the anode electrode, wherein the catalyst is made of metal, metal compound, alloy, containing heteroatoms, A carbon compound containing at least one metal heterocyclic compound, and any two or more combinations of the above are selected from the group. The electrochemical device as claimed in claim 4, wherein the metal is composed of vanadium, chromium, manganese, iron, cobalt, nickel, copper, tin, zirconium, niobium, molybdenum, ruthenium, rhodium, palladium, silver, cadmium, hafnium, Selected from the group consisting of tantalum, tungsten, rhenium, iridium, platinum, gold, aluminum, indium, titanium, lead, bismuth, antimony, tellurium, lanthanum, cerium, neodymium, and combinations thereof. The electrochemical device as claimed in claim 4, wherein the metal compound is selected from the group consisting of metal halides, metal oxides, metal hydroxides, metal sulfides, metal nitrides, and combinations of at least two of the foregoing. elected. The electrochemical device as claimed in claim 4, wherein at least one of the carbon compound containing heteroatoms and the metal-containing heterocyclic compound is composed of nitrogen-containing, sulfur-containing graphite, graphene, carbon tubes, and metal atoms. selected from the group forming the structure. The electrochemical device as claimed in claim 1 and claim 2, wherein the mixed gas including carbon dioxide reduction products is selected from the group consisting of hydrogen, carbon dioxide, carbon monoxide, methane, ethane, ethylene, and combinations thereof. The electrochemical device as claimed in claim 1, the anode feed includes an anode reactant and an anolyte, wherein the anolyte is composed of sodium hydroxide, sodium bromide, sodium bicarbonate, sodium sulfate, and sodium phosphate. , sodium hydrogen phosphate, lithium hydroxide, lithium bromide, lithium hydrogen carbonate, lithium sulfate, lithium phosphate, lithium hydrogen phosphate, potassium hydroxide, potassium bromide, potassium hydrogen carbonate, potassium sulfate, potassium phosphate, potassium hydrogen phosphate, urea, chlorine Selected from the group of potassium chloride, sodium chloride, and aqueous solutions of the aforementioned combinations. The electrochemical device of claim 9, wherein the anode output includes an anode product and the anolyte, and the anode product is selected from the group consisting of oxygen, carbon dioxide, nitrogen, chlorine, and combinations thereof. The electrochemical device as claimed in claim 2, wherein the anolyte is composed of sodium hydroxide, sodium bromide, sodium bicarbonate, sodium sulfate, sodium phosphate, sodium hydrogenphosphate, lithium hydroxide, lithium bromide, lithium bicarbonate, Lithium sulfate, lithium phosphate, lithium hydrogen phosphate, potassium hydroxide, potassium bromide, potassium bicarbonate, potassium sulfate, potassium phosphate, potassium hydrogen phosphate, urea, potassium chloride, sodium chloride, and groups of aqueous solutions of the foregoing combinations selected. The electrochemical device of claim 2, wherein the anode output is selected from the group consisting of oxygen, carbon dioxide, nitrogen, chlorine, and combinations thereof. The electrochemical device as claimed in claim 2, the anolyte chamber allows an anolyte to pass through or a solid electrolyte is disposed therein, wherein the anolyte is composed of sodium hydroxide, sodium bromide, sodium bicarbonate, sulfuric acid Sodium, sodium phosphate, sodium hydrogen phosphate, lithium hydroxide, lithium bromide, lithium hydrogen carbonate, lithium sulfate, lithium phosphate, lithium hydrogen phosphate, potassium hydroxide, potassium bromide, potassium hydrogen carbonate, potassium sulfate, potassium phosphate, potassium hydrogen phosphate , urea, potassium chloride, sodium chloride, and aqueous solutions of the aforementioned combinations. As for the electrochemical equipment described in claim 1 and claim 2, the cathode electrolyte is selected from the group consisting of a cathode electrolyte and a solid electrolyte, wherein the cathode electrolyte is composed of sodium hydroxide and sodium bromide. , sodium bicarbonate, sodium sulfate, sodium phosphate, sodium hydrogenphosphate, lithium hydroxide, lithium bromide, lithium bicarbonate, lithium sulfate, lithium phosphate, lithium hydrogenphosphate, potassium hydroxide, potassium bromide, potassium bicarbonate, potassium sulfate, Selected from the group of potassium phosphate, potassium hydrogen phosphate, and any two or more combinations of the aforementioned electrolytes. The electrochemical device as claimed in claim 14, wherein the solid electrolyte is selected from the group consisting of a polymer solid electrolyte, an inorganic solid electrolyte, an organic and inorganic composite solid electrolyte, a colloidal electrolyte, and a combination of any two or more of the above. selected. The electrochemical device according to claim 1 and claim 2, wherein the cathode electrode is a gas diffusion electrode. The electrochemical device according to claim 1 and claim 2, wherein at least one of the cathode electrode and the anode electrode is a porous electrode, and one of the materials of the porous electrode includes at least polytetrafluoroethylene, polytetrafluoroethylene, Conductive composites, conductive polymers, porous carbon materials, and porous metal materials mixed with propylene, polyethylene and conductors, including chemical deposition methods, physical deposition methods, electroplating methods, and and electroless plating method to modify a metal on a porous material to become the porous metal material, or the material selected from at least any two groups mentioned above to serve as the porous electrode. The electrochemical device as claimed in claim 17, wherein the metal is composed of vanadium, chromium, manganese, iron, cobalt, nickel, copper, tin, zirconium, niobium, molybdenum, ruthenium, rhodium, palladium, silver, cadmium, hafnium, Selected from the group consisting of tantalum, tungsten, rhenium, iridium, platinum, gold, aluminum, indium, titanium, lead, bismuth, antimony, tellurium, lanthanum, cerium, neodymium, and combinations thereof. A system including the electrochemical treatment equipment for reducing carbon dioxide as described in claim 1 and claim 2, including a plurality of the electrochemical treatment equipment for reducing carbon dioxide connected to each other in series or parallel or in series and parallel.

Images