TWI816374B - Electrochemical equipment for reduction of carbon dioxide and system thereof - Google Patents

Abstract

An electrochemical equipment for reduction of carbon dioxide is provided with cathode chamber, anode chamber and a semipermeable unit interposed between the cathode chamber and the anode chamber. The cathode chamber includes cathode electrode, cathode inlet port and cathode outlet port. A gas feed or dissolved form carbon dioxide enters the cathode chamber via the cathode inlet port.

Description

Electrochemical equipment and systems for reducing carbon dioxide

The present invention relates to the field of equipment and systems for reducing carbon dioxide, in particular to electrochemical equipment and systems for reducing carbon dioxide.

As we all know, greenhouse gases including carbon dioxide are one of the factors causing climate change, and reaching net-zero carbon emissions is an urgent goal for global mankind. Therefore, technology to capture, reuse, and even store carbon dioxide is accelerating research. and developing.

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, one method is to combine a photocatalyst and a water decomposition system to generate electron-hole pairs by illuminating light. One splits water to produce oxygen and reduces carbon dioxide, while the other reduces carbon dioxide electrocatalytically.

Based on the above, the existing photocatalytic method can only be used in batch reaction devices and has low energy conversion efficiency, which is very unfavorable for processing large amounts of carbon dioxide. The electrocatalytic method faces problems such as carbon dioxide diffusion capacity, conversion rate, product separation and purification, etc. The shortcomings of complicated steps also need to be effectively improved.

In terms of modern trends, the industry is looking forward to electrochemical equipment and systems that reduce carbon dioxide, so that the industry can develop and utilize electrochemical equipment and systems that are highly environmentally friendly and related to carbon dioxide.

An electrochemical device for reducing carbon dioxide of the present invention includes: a cathode chamber, including a cathode electrode, a cathode feed port, and a cathode discharge port; an anode chamber, including an anode electrode, and an anode feed port port and an anode discharge port; and an isolation unit.

An electrochemical device for reducing carbon dioxide according to the present invention, wherein the carbon dioxide gas feed enters the cathode chamber from the cathode feed port, and a mixed gas including carbon dioxide reduction products leaves the cathode chamber from the cathode discharge port, and the The cathode electrode reduces the carbon dioxide gas feed to form the mixed gas including the carbon dioxide reduction product; an anode chamber includes an anode electrode, an anode feed port and an anode outlet port, wherein a feed including the anolyte is supplied from The anode feed port enters the anode chamber, an anode product discharge exits the anode chamber from the anode discharge port, and the anode electrode is disposed in the anode chamber to contact the feed including anolyte and the anode Product discharge; and an isolation unit is disposed between the cathode electrode and the anode electrode and separates the cathode chamber and the anode chamber.

According to the foregoing, a system of electrochemical equipment for reducing carbon dioxide according to the present invention includes a gas separation equipment connected to the cathode discharge port, wherein the gas separation equipment at least includes an adsorption unit to remove the mixed gas from the mixed gas including carbon dioxide reduction products. absorb carbon dioxide.

The invention provides an electrochemical equipment and system for reducing carbon dioxide, which uses carbon dioxide as feed material as carbon dioxide gas. The advantage is that it can avoid the poor solubility of carbon dioxide in general catholyte, thereby increasing the concentration of reactants and thereby improving the reactivity. (high current density).

One of the advantages of the present invention is that the gas diffusion electrode serves as the cathode electrode, which effectively reduces the distance between the electrodes and reduces the resistance, thereby reducing the resistance of the reaction tank and improving the stability and high current density of the electrode.

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.

The implementation method of the electrochemical device for reducing carbon dioxide and its system of the present invention will be described below through specific embodiments. Persons skilled in the relevant field can understand the advantages and effects of the present invention from the content disclosed herein, and the present invention can be implemented through other specific embodiments. Or application, various details can be modified and changed based on different viewpoints and applications without departing from the concept of the present invention.

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

As shown in FIG. 1 , in an embodiment of the electrochemical device for reducing carbon dioxide according to the present invention, the isolation unit 30 can be regarded as a structure that separates the body of the electrochemical device 2 for reducing carbon dioxide from the cathode chamber 10 and the anode chamber 20 . Secondly, the cathode chamber 10 includes a cathode electrode 12 , a cathode feed port 13 , and a cathode outlet port 15 , wherein the cathode electrode 12 is adjacent to or close to the isolation unit 30 . The cathode feed port 13 and the cathode discharge port 15 are located at appropriate positions in the cathode chamber 10 for external connection to other components, structures, equipment or devices.

Continuing to refer to the embodiment of the electrochemical device for reducing carbon dioxide according to the present invention, the anode chamber 20 includes an anode electrode 22, an anode feed port 23 and an anode discharge port 25, wherein the anode electrode 22 is adjacent to or close to the isolation unit 30 , the anode feed port 23 and the anode discharge port 25 are located at appropriate positions in the anode chamber 20 to externally connect other components, structures, equipment, or devices.

Referring again to the embodiment of the electrochemical device for reducing carbon dioxide of the present invention shown in Figure 1, the isolation unit 30 of the present invention is disposed between the cathode electrode 12 and the anode electrode 22, and the three basically extend between the electrochemical device 2 for reducing carbon dioxide. On any section of the body, the fluids (gas or liquid or both) in the cathode chamber 10 and the anode chamber 20 cannot directly flow or mix, and the substances in the fluid pass through the isolation under the selection of the isolation unit 30 Only then can the unit 30 enter from one chamber to another. In addition, the positions of the cathode feed port 13, cathode discharge port 15, anode feed port 23 and anode discharge port 25 on the body in Figure 1 are only for convenience of illustration and can be adjusted according to the actual application, and are not intended to be limiting. The relative position of the chamber and port of the present invention.

Please refer again to the embodiment of the electrochemical equipment for reducing carbon dioxide of the present invention shown in Figure 1. The cathode chamber 10 is connected to a pipeline, component, equipment, or device for inputting gas feed through the cathode feed port 13. In this embodiment, , carbon dioxide enters the cathode chamber 10 from the cathode feed port 13. The carbon dioxide here may be a gas including carbon dioxide. The concentration of the carbon dioxide gas is, for example but not limited to, 0.01-100% by volume, wherein the carbon dioxide here is The phase of the gas feed 14 is predominantly gas phase. It should be noted here that the present invention mainly feeds 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 what the present invention advocates. Technical core. Therefore, although the present invention advocates using cathode gas feed as one of the main technologies, it is not limited to the fact that the cathode gas feed of the present invention must not contain liquid phase moisture or other components, such as electrolyte, but the carbon dioxide gas feed of the present invention , the carbon dioxide enters the reduction equipment in the gas phase to perform electrochemical reactions, which is different from the traditional technology of dissolving carbon dioxide in the liquid phase to perform electrochemical reactions. The two are different.

As shown in FIG. 1 , the embodiment of the electrochemical equipment for reducing carbon dioxide according to the present invention is still shown. During the electrolysis reaction, the carbon dioxide entering the cathode chamber 10 from the cathode feed port 13 will be reduced to carbon monoxide or more on the cathode electrode 12 Other product gases, such as methane, ethane, ethylene, formic acid, methanol, or ethanol and other combinations of the above, so carbon monoxide, other product gases, non-reactive gases, unused carbon dioxide, or some or all of the above gases are formed Mixed gas 16 including carbon dioxide reduction products. The mixed gas 16 including carbon dioxide reduction products leaves the cathode chamber 10 through the cathode discharge port 15, which can be externally connected to a pipeline. The mixed gas 16 including carbon dioxide reduction products is transported by the pipeline to other units, equipment or devices for further processing. It should be noted here that the mixed gas 16 including carbon dioxide reduction products referred to in 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 , there may be very little liquid moisture present in the mixed gas including carbon dioxide reduction products 16 due to operating conditions or environmental factors, or water vapor and moisture reach gas-liquid equilibrium, which may occur in the mixture including carbon dioxide reduction products Gas 16.

Continuing with the embodiment of the electrochemical equipment for reducing carbon dioxide according to the present invention, as shown in FIG. 1 , the anode chamber 20 is connected to a liquid (gas) feed pipeline, component, equipment, or device through the anode feed port 23 . In this embodiment, the liquid feed including the anolyte enters the anode chamber 20 from the anode feed port 23, where the phase presented by the feed 24 including the anolyte is a liquid phase, or It is a gas-liquid coexistence form including anode reaction gas.

As shown in the embodiment of the electrochemical device for reducing carbon dioxide of the present invention, in the electrolysis reaction, the feed 24 including the anolyte contacts the anode electrode 22, and is electrolyzed to generate an anode product, such as, but not limited to, oxygen, Carbon dioxide, nitrogen, chlorine, or a combination of the above. The anode product and the anolyte constitute the anode product discharge 26. The anode product discharge 26 leaves the anode chamber 20 through the anode discharge port 25. The anode discharge port 25 can be externally connected to another pipeline, and the anode product discharge 26 26 can be transported by the pipeline to other units, equipment, or devices for further processing. Furthermore, the 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, phosphoric acid Aqueous solutions of electrolytes of lithium, lithium hydrogen phosphate, potassium hydroxide, potassium bromide, potassium hydrogen carbonate, potassium sulfate, potassium phosphate, potassium hydrogen phosphate, urea, potassium chloride, sodium chloride or any combination thereof.

Continuing to refer to FIG. 1 , in the embodiment of the present invention, the cathode electrode 12 facilitates the reduction reaction of the gas phase reactant carbon dioxide therein, such as a porous electrode. Secondly, the cathode electrode 12 may further include one or more cathode catalysts, for example but not limited to gold, silver, zinc, copper, bismuth, tin or other metals, or metal single atom catalysts or various combinations of the above, and the cathode catalyst It is disposed on the cathode electrode 12 in an appropriate manner, such as, but not limited to, physical adsorption, chemical adsorption, or chemical bonding.

As shown in FIG. 1 , secondly, the anode electrode 22 may include one or more anode catalysts, for example but not limited to, including ruthenium, iridium, titanium, nickel, iron, cobalt, platinum and other metals, as well as combinations of the foregoing, which may The anodic oxidation reactions performed include oxygen evolution reaction (Oxygen Evolution Reaction, OER), chlorine evolution reaction (Chlorine Evolution Reaction, CER), urea oxidation reaction (Urea Oxidation Reaction, UOR), oxygen reduction reaction (Oxygen Reduction Reaction), phenol oxidation reactions, and oxidation reactions of organic pollutants. The anode electrode 22 may include an anode catalyst, or a plurality of anode catalysts, and may be disposed on the anode electrode 22 in an appropriate manner, for example but not limited to, by physical adsorption, chemical adsorption, or chemical bonding. Knot method.

Still as shown in Figure 1, catalysts such as cathode catalysts and anode catalysts can be metals, metal compounds, alloys, or contain heteroatoms (heteroatoms refer to atoms other than carbon and hydrogen in organic compounds. ), or a carbon compound of at least one of the metal-containing heterocyclic compounds (metallacyclic compound) or a combination of any two or more of the aforementioned. Metals include 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. The metal compounds include organic metal compounds and inorganic metal compounds, and cover metal halides, metal oxides, metal hydroxides, metal sulfides, and metal nitrides. Carbon compounds containing at least one of heteroatoms and metal-containing heterocyclic compounds include nitrogen-containing, sulfur-containing graphite, graphene, carbon tubes and other carbon materials, as well as structures composed of metal atoms.

As shown in FIG. 1 , furthermore, the cathode electrode 12 or the anode electrode 22 is prepared as follows. For example, at least one of the cathode electrode 12 and the anode electrode 22 is a porous electrode. For example, but not The materials for the porous electrodes can be, but are not limited to, polytetrafluoroethylene, polypropylene, polyethylene and conductor-blended conductive composites, conductive polymers, porous carbon materials, and porous metals. The material can also be used as the cathode electrode 12 through a gas diffusion electrode. The manufacturing method of the porous metal material is to modify the selected metal on the porous material by chemical deposition, physical deposition, electroplating, or chemical plating to become the porous metal material. And the selected metal is the same as the metal material of the aforementioned anode or cathode catalyst. The material selected for the porous electrode may include any combination of at least any two of the aforementioned groups, and the selected material is used as the Porous electrode.

Furthermore, the isolation unit 30 may be a porous ceramic, a bipolar membrane (Bipolar Membrane), an anion semipermeable membrane, or a cation semipermeable membrane. The porous electrode is selected from at least any two of the aforementioned groups.

According to the aforementioned Figure 1, when the carbon dioxide feed of the present invention 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 improving the reactivity. Secondly, the present invention can be used as a cathode electrode through a porous electrode or a gas diffusion electrode, which can effectively improve the concentration of reactants and the mass transfer efficiency. In addition, the configuration of the membrane electrode assembly (MEA) can effectively reduce the distance between the electrodes and reduce the resistance, thereby reducing the resistance of the reaction tank and improving the stability and current density of the electrodes.

Figure 2 is a block schematic diagram of an embodiment of a system including an electrochemical device for reducing carbon dioxide according to the present invention. The electrochemical system for reducing carbon dioxide at least includes an electrochemical device for reducing carbon dioxide 2, a gas separation device 6 and a gas-liquid product separation device 8.

As shown in Figure 2, there is a system embodiment of the present invention including an electrochemical device for reducing carbon dioxide, in which the gas separation device 6 is connected to the cathode discharge port 15 through appropriate pipelines 17, and is further connected to the electrochemical device 2 for reducing carbon dioxide.

Still as shown in Figure 2, there is a system embodiment of the present invention including an electrochemical device for reducing carbon dioxide. After the mixed gas 16 including carbon dioxide reduction products leaves the electrochemical device 2 for reducing carbon dioxide in Figure 1, it enters the gas separation device 6 through the pipeline 17. For the separation of gas phase products, the gas separation device 6 at least includes an adsorption unit 62 to absorb carbon dioxide from the mixed gas 16 including carbon dioxide reduction products.

As shown in Figure 2, a system embodiment of the present invention including an electrochemical device for reducing carbon dioxide, the adsorption unit 62 of the gas separation device 6 has absorbed carbon dioxide from the mixed gas 16 including the carbon dioxide reduction product, and left from the gas separation device 6 The cathode mixed gas 66 does not include carbon dioxide, but the cathode mixed gas 66 is still a mixed gas.

As shown in Figure 2, a system embodiment of the present invention including an electrochemical device for reducing carbon dioxide, wherein the gas separation device 6 includes a pressure swing adsorption unit to separate at least hydrogen and carbon monoxide from the mixed gas including carbon dioxide reduction products. , methane, ethylene, and ethane, and the gas separation device 6 also includes a low-temperature distillation unit to separate at least hydrogen, carbon monoxide, methane, and ethylene from the mixed gas including carbon dioxide reduction products. , and selected from the group of ethane. In other words, multiple mixed gases are required to pass through the system embodiment of the present invention including the electrochemical device for reducing carbon dioxide as shown in FIG. 2 , thereby further separating the gases of the cathode mixed gas 66 .

Referring to the system embodiment of the present invention including an electrochemical device for reducing carbon dioxide as shown in FIG. 2 , the carbon dioxide recovered by the adsorption unit 62 can be returned to the cathode feeding unit 7 through the pipeline 67 . The gas separation equipment 6 may further include a pressure swing adsorption unit (not shown in the figure), a low-temperature distillation unit (not shown in the figure), or both a pressure swing adsorption unit and a low-temperature distillation unit.

Furthermore, the pressure swing adsorption unit of the gas separation equipment 6 or the low-temperature distillation unit of the gas separation equipment 6 can separate carbon dioxide reduction products such as hydrogen, carbon monoxide, methane, ethylene, and ethane from the mixed gas 16 including carbon dioxide reduction products. product. In addition, the cathode mixed gas 66 separated from the gas separation device 6 can be composed of carbon monooxide, hydrogen, lower alkanes, alcohols and other products remaining after separation in any combination.

Still as shown in FIG. 2 , a system embodiment of the present invention including an electrochemical device for reducing carbon dioxide, the gas-liquid product separation device 8 is connected to the anode discharge port 25 through appropriate pipelines 27 and is further connected to the electrochemical device 2 for reducing carbon dioxide. The anode product discharge 26 in Figure 1 leaves the anode chamber 20 from the anode discharge port 25, and is input into the gas-liquid product separation device 8 from the pipeline 27 in Figure 2 for gas-liquid separation. The anolyte separated from the gas-liquid product separation device 8 can be recycled to the anode feeding unit 9 through the pipeline 87 . The anode mixed gas 86 separated from the gas-liquid product separation device 8 may include oxygen, chlorine, carbon dioxide, nitrogen, water vapor, etc. The gas-liquid product separation device 8 further includes an adsorption unit 82 to absorb carbon dioxide and water vapor, or introduces the anode mixed gas 86 into other adsorption units to absorb carbon dioxide and water vapor.

FIG. 3 is a block schematic diagram of another system embodiment of the present invention including an electrochemical device for reducing carbon dioxide. Comparing Figure 3 with Figure 2, it includes a plurality of electrochemical devices 2 for reducing carbon dioxide, connected in parallel, in series, or in a series-parallel manner to process the reduction of carbon dioxide. Other pipelines, components, equipment, or devices , can be the same as or modified correspondingly to each part in Figure 2, and will not be described again here. Secondly, in FIG. 3 , the number of electrochemical devices 2 for reducing carbon dioxide is only an example and is not used to limit the number of electrochemical devices that can be connected in series and parallel in the present invention.

Figure 4 is a block schematic diagram of another system embodiment of the present invention including an electrochemical device for reducing carbon dioxide. Comparing Figure 4 with Figure 3, the discharge of the electrochemical device 2 for reducing carbon dioxide is the feed of the next electrochemical device 2 for reducing carbon dioxide. The other pipelines, components, equipment, or devices can be combined with Each part in Figure 2 is identical or modified accordingly, and will not be described again here.

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 equipment for reducing carbon dioxide

6: Gas separation equipment

7:Cathode feeding unit

8: Gas-liquid product separation equipment

9: Anode feeding unit

10:Cathode chamber

12:Cathode electrode

13:Cathode feed port

14: Carbon dioxide gas feed

15:Cathode discharge port

16: Mixed gas including carbon dioxide reduction products

17:Pipeline

20:Anode chamber

22:Anode electrode

23:Anode feed port

24: Including anolyte feed

25: Anode discharge port

26: Anode product discharging

27:Pipeline

30:Isolation unit

62:Adsorption unit

66:Cathode mixed gas

67:Pipeline

82:Adsorption unit

86: Anode mixed gas

87:Pipeline

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

Figure 2 is a block schematic diagram of a system embodiment of the present invention including an electrochemical device for reducing carbon dioxide.

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

4 is a block schematic diagram of another system embodiment of the present invention including an electrochemical device for reducing carbon dioxide.

2: Electrochemical equipment for reducing carbon dioxide

10:Cathode chamber

12:Cathode electrode

13:Cathode feed port

14: Carbon dioxide gas feed

15:Cathode discharge port

16: Mixed gas including carbon dioxide reduction products

20:Anode chamber

22:Anode electrode

23:Anode feed port

24: Including anolyte feed

25: Anode discharge port

26: Anode product discharging

30:Isolation unit

Claims (13)

An electrochemical device for reducing carbon dioxide, including: a cathode chamber, including: a cathode electrode; a cathode feed port; and a cathode discharge port, wherein a carbon dioxide gas feed enters the cathode cavity from the cathode feed port chamber, a mixed gas including carbon dioxide reduction products leaves the cathode chamber from the cathode outlet, the cathode electrode reduces the carbon dioxide gas feed to form the mixed gas including carbon dioxide reduction products; a gas separation device connected to the cathode Discharge port, the gas separation equipment includes: an adsorption unit to absorb carbon dioxide from the mixed gas including carbon dioxide reduction products; a low-temperature distillation unit to separate at least hydrogen from the mixed gas including carbon dioxide reduction products. , carbon monoxide, methane, ethylene, and ethane selected from the group; and a pressure swing adsorption unit to separate at least hydrogen, carbon monoxide, methane, ethylene, and ethane from the mixed gas including carbon dioxide reduction products. selected from the group of alkanes; an anode chamber including: an anode electrode; an anode feed port; and An anode discharge port, wherein a feed including anolyte enters the anode chamber from the anode feed port, an anode product discharge leaves the anode chamber from the anode discharge port, the anode electrode is disposed on the anode chamber The anode chamber is in contact with the feed including the anolyte and the anode product discharge, 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 at least contains polyethylene Conductive composites, conductive polymers, porous carbon materials, and porous metal materials mixed with tetrafluoroethylene, polypropylene, polyethylene and conductors, including chemical deposition methods, physical deposition methods, electroplating methods, and electroless plating The method of modifying 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, wherein the metal is composed 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 , selected from the group consisting of lead, bismuth, antimony, tellurium, lanthanum, cerium, neodymium, and combinations thereof; and an isolation unit is disposed between the cathode electrode and the anode electrode and separates the cathode chamber and the anode Chamber, wherein the isolation unit is selected from the group consisting of a porous ceramic semipermeable membrane, a bipolar membrane, an anion semipermeable membrane, and a cation semipermeable membrane. The electrochemical device as claimed in claim 1, further comprising a catalyst disposed on at least one of the cathode electrode and the anode electrode, wherein the catalyst is made of metal, metal compounds, alloys, heteroatoms, and metal heterocycles. The compound is selected from the group consisting of at least one carbon compound and any two or more combinations of the aforementioned compounds. The electrochemical device as claimed in claim 2, 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 of claim 2, 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 2, 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, 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, wherein the anode product output is selected from the group consisting of oxygen, carbon dioxide, nitrogen, chlorine, and combinations thereof. The electrochemical equipment as described in claim 1, wherein the feed of the anolyte is sodium hydroxide, sodium bromide, sodium bicarbonate, sodium sulfate, sodium phosphate, sodium hydrogenphosphate, lithium hydroxide, lithium bromide, carbonic acid Lithium hydrogen, 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 aqueous solutions of the foregoing combinations selected from the group. The electrochemical equipment of claim 1 further includes a gas-liquid product separation device connected to the anode discharge port, wherein the gas-liquid product separation device performs gas-liquid separation on the anode product discharge. The electrochemical device according to claim 1, further comprising a catalyst disposed on at least one of the cathode electrode and the anode electrode, wherein the catalyst is composed of metal, metal compound, alloy, heteroatom-containing, metal-containing heterocycle The compound is selected from the group consisting of at least one carbon compound and any two or more combinations of the aforementioned compounds. The electrochemical device as claimed in claim 10, 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 of claim 10, 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 10, 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.

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