Green electricity energy conversion system and method based on electrocatalytic ammonia production and ammonia combustion

Abstract

The invention relates to a green electricity energy conversion system and method based on electro-catalysis ammonia production and ammonia combustion, the system comprises an electro-catalysis ammonia production device, a combustion device, a generator and a post-treatment device, the electro-catalysis ammonia production device, the combustion device and the post-treatment device are sequentially and circularly connected, and the generator is connected with the combustion device; the electro-catalysis ammonia production device uses green electricity as an electric energy source of electro-catalysis ammonia production, the combustion device uses prepared ammonia gas as fuel for ammonia combustion to drive a generator to work, the post-treatment device treats combustion emissions of the combustion device, products nitrogen and water are obtained through post-treatment, and the power generation device is connected with the combustion device. And after being condensed, the water is circularly introduced into the electro-catalysis ammonia production device to participate in electro-catalysis ammonia production again. Compared with the prior art, waste electricity is converted and merged into a power grid for transmission, green electricity is effectively utilized, and carbon emission is effectively eliminated.

Description

Technical Field

[0001] The present invention belongs to the technical field of energy conversion, and relates to a green electricity energy conversion system and method based on electrocatalytic ammonia production and ammonia combustion. Background Art

[0002] Ammonia (NH3) is a naturally occurring zero-carbon fuel composed of one nitrogen atom and three hydrogen atoms. It boasts high energy density and a high hydrogen storage density, with a hydrogen content per unit volume exceeding four times that of compressed hydrogen. Ammonia, a product of nitrogen and hydrogen synthesis, can be liquefied and stored under standard conditions (at -33°C under atmospheric pressure or at 1.03 MPa at room temperature).

[0003] Currently, industrial ammonia production typically uses the Harper-Bosch process, which produces hydrogen from water or methane. Ammonia is then synthesized from hydrogen and nitrogen at 723-873K and 10-25MPa. This synthesis process consumes significant energy, and the efficiency of a single cycle is only 15-25%. In recent years, researchers have discovered that ammonia can be produced directly from nitrogen and water using a noble metal electrolyte membrane at room temperature and pressure. This method offers lower costs than the Harper-Bosch process, and the efficiency can be increased to over 60% by adding heating.

[0004] Wind power and photovoltaic power are widely recognized as green electricity, and solar and wind power are also renewable energy sources. However, these two methods of generating electricity have significant limitations. Wind and photovoltaic power are significantly impacted by the environment. First, unstable power generation prevents the electricity generated by these two methods from being integrated into the grid. Second, these power generation methods are typically located in western China or offshore areas. These two factors have limited their use to small, localized areas, significantly hindering their widespread adoption.

[0005] Patent CN118775899A discloses a natural gas-ammonia combustion system coupled with green hydrogen to produce ammonia. The system comprises an ammonia production subsystem and a combustion subsystem. The ammonia production subsystem includes an electrolysis unit, a water storage tank, an oxygen storage tank, a hydrogen storage tank, an ammonia production kettle, and a nitrogen storage tank. The combustion subsystem includes a fuel mixing unit, a combustion chamber, a steam generator, a nitrogen oxide treatment unit, a carbon-nitrogen separation unit, and a carbon dioxide storage tank. An ammonia storage tank is located between the fuel mixing unit and the ammonia production kettle. However, this patent has several shortcomings: First, hydrogen is produced by electrolysis of water, which is then reacted with nitrogen to produce ammonia, a traditional Harper-Bosch process with low efficiency. Second, the patent incorporates natural gas, which fails to achieve the goal of a zero-carbon full-cycle system. Third, the patent uses green electricity electrolysis to produce hydrogen, followed by ammonia production. Ultimately, the ammonia is used only to make urea and has nothing to do with power generation.

[0006] Patent CN115838937A discloses a low-carbon emission system and method combining electrochemical technology with coal-fired ammonia mixing technology. The system comprises: a user terminal, a coal-fired ammonia mixing power generation device, an electrocatalytic nitrogen reduction reactor, an electrocatalytic carbon dioxide reduction reactor, and a renewable energy power generation device. The power outlet, nitrogen outlet, and carbon dioxide outlet of the coal-fired ammonia mixing power generation device are connected to the user terminal, the electrocatalytic nitrogen reduction reactor, and the electrocatalytic carbon dioxide reduction reactor, respectively. The power outlet of the renewable energy power generation device is connected to the electrocatalytic nitrogen reduction reactor and the electrocatalytic carbon dioxide reduction reactor, respectively. Although this patent also uses the electrocatalytic ammonia production process, the combustion of ammonia and coal drives the generator, which does not meet the full-cycle zero-carbon requirement. Summary of the Invention

[0007] The purpose of the present invention is to overcome at least one of the defects of the above-mentioned prior art and to provide a green electricity energy conversion system and method based on electrocatalytic ammonia production and ammonia combustion. The present invention realizes the conversion of "waste electricity" into power grid transmission, realizes the effective utilization of green electricity, and effectively eliminates carbon emissions.

[0008] The purpose of the present invention can be achieved by the following technical solutions:

[0009] One of the technical solutions of the present invention is to provide a green electricity energy conversion system based on electrocatalytic ammonia production and ammonia combustion, the system comprising an electrocatalytic ammonia production device, a combustion device, a generator, and a post-processing device, wherein the electrocatalytic ammonia production device, the combustion device, and the post-processing device are connected in a circular manner in sequence, and the generator is connected to the combustion device;

[0010] The electrocatalytic ammonia production device uses green electricity as the power source for electrocatalytic ammonia production, the combustion device uses the produced ammonia (NH3) as fuel for ammonia combustion to drive the generator, and the post-processing device processes the combustion emissions of the combustion device to obtain nitrogen (N2) and water (H2O) as products. After condensation, the water is circulated into the electrocatalytic ammonia production device to participate in electrocatalytic ammonia production again.

[0011] Furthermore, the green electricity is selected from one or more of wind power generation and photovoltaic power generation.

[0012] As a preferred technical solution, the electrocatalytic ammonia production device is arranged near the area where green electricity is located, and the electricity generated by green electricity is directly electrocatalytically produced into ammonia, which is convenient for on-site utilization of green electricity.

[0013] Furthermore, the electrocatalytic ammonia production device uses water and nitrogen to generate ammonia and oxygen (O2) through electrocatalysis, and the chemical reaction formula for electrocatalytic ammonia production is 2N2+6H2O=4NH3+3O2.

[0014] As a preferred technical solution, the water used in the electrocatalytic ammonia production device is selected from one or more of water introduced from the outside and condensed water circulated in the system.

[0015] As a preferred technical solution, the system uses water introduced from the outside when it is turned on, uses condensed water circulated in the system during operation, and supplements the water introduced from the outside when the condensed water is insufficient.

[0016] As a preferred technical solution, the nitrogen used in the electrocatalytic ammonia production device is nitrogen introduced from the outside.

[0017] Furthermore, electrocatalysis is performed using a positive electrode and a negative electrode inserted into an electrolyte.

[0018] Furthermore, the positive electrode is made of platinum (Pt) or graphite, the negative electrode is made of iron-fluorine doped tin oxide glass (Fe-FTO glass) or iron-nickel foam (Fe-Nickel foam), and the electrolyte is [P 6,6,6,14 ][eFAP] ionic liquid or [C4mpyr][eFAP] ionic liquid.

[0019] Furthermore, the ammonia and oxygen obtained by the electrocatalytic ammonia production device are separated by cooling and pressurizing, and then liquefied and stored in an ammonia storage device and an oxygen storage device respectively.

[0020] As a preferred technical solution, the ammonia storage device adopts a liquid ammonia tank, and the oxygen storage device adopts an oxygen tank.

[0021] As a preferred technical solution, the ammonia in the ammonia storage device is used as fuel for ammonia combustion or is directly transported as a chemical raw material, kiln fuel, or fuel cell raw material for chemical plants to produce other chemical products.

[0022] Furthermore, the combustion device uses stored ammonia and oxygen as fuel and oxidant for ammonia combustion, and ammonia is introduced into the combustion device to burn and drive the generator. However, since the combustion characteristics of ammonia are poor, the produced oxygen can also be introduced into the combustion device to promote the combustion of ammonia fuel and improve the combustion efficiency of the combustion device.

[0023] Furthermore, the combustion device is selected from one or more of an ammonia fuel engine, an ammonia fuel gas turbine, and a boiler.

[0024] As a preferred technical solution, the electricity generated by the generator is fed into the power grid.

[0025] Furthermore, the post-processing device can be used to treat unburned ammonia, nitrogen oxides (NO x) and nitrous oxide (N2O) and other combustion emissions are catalytically decomposed, usually requiring the integration of multiple catalysts, the post-treatment device is selected from one or more of a selective catalytic reduction device (SCR), an ammonia slip catalyst (ASC), an ammonia oxidation catalyst (AOC), and a nitrous oxide decomposition catalyst (DeN2O), to ensure that the combustion emissions can be efficiently reduced to nitrogen and water.

[0026] As a preferred technical solution, the catalyst of the selective catalytic reduction device is a molecular sieve.

[0027] As a preferred technical solution, the molecular sieve adopts a copper (Cu)-based molecular sieve, an iron (Fe)-based molecular sieve or a manganese (Mn)-based molecular sieve.

[0028] As a preferred technical solution, the catalyst of the ammonia slip catalyst is a precious metal alloy or a precious metal oxide.

[0029] As a preferred technical solution, the precious metal alloy is silver-copper alloy.

[0030] As a preferred technical solution, the noble metal oxide is platinum oxide, palladium oxide or rhodium oxide.

[0031] As a preferred technical solution, the catalyst of the ammonia oxidation catalyst is a precious metal alloy.

[0032] As a preferred technical solution, the precious metal alloy is Pt / CeZrO2 or Ni-doped Pt / Ce-Zr.

[0033] As a preferred technical solution, the catalyst of the nitrous oxide decomposition catalyst is made of metal.

[0034] As a preferred technical solution, the metal includes copper, iron, nickel (Ni), indium (In), palladium (Pd), ruthenium (Ru) or rhodium (Rh).

[0035] As a preferred technical solution, the catalyst of the nitrous oxide decomposition catalyst is made of precious metal.

[0036] As a preferred technical solution, the noble metal includes palladium, ruthenium or rhodium.

[0037] As a preferred technical solution, the nitrogen generated by the post-processing device is discharged to the outside or stored in a nitrogen storage device.

[0038] One of the technical solutions of the present invention is to provide a green electricity energy conversion method based on electrocatalytic ammonia production and ammonia combustion. The method uses the above-mentioned system to perform green electricity energy conversion, and the method includes the following steps:

[0039] The electrocatalytic ammonia production device uses green electricity as the source of electricity for electrocatalytic ammonia production, and uses water and nitrogen as raw materials for electrocatalytic ammonia production. The electrocatalytic ammonia production obtains ammonia and oxygen as products, and the produced ammonia and oxygen are stored in a storage device. The combustion device uses the produced ammonia and oxygen as fuel and oxidant for ammonia combustion, and uses the energy of ammonia combustion to drive the generator. The electricity generated by the generator is connected to the power grid. The post-processing device processes the combustion emissions of the combustion device, and the post-processing obtains nitrogen and water as products. After condensation, the water is circulated into the electrocatalytic ammonia production device to participate in electrocatalytic ammonia production again.

[0040] Compared with the prior art, the present invention has the following beneficial effects:

[0041] (1) The present invention uses green electricity as the source of electricity for electrocatalytic ammonia production, and uses the produced ammonia as fuel for ammonia combustion to drive the generator. The generated electricity is stable and no longer affected by the environment. It realizes the conversion of "waste electricity" into power grid transmission. The green electricity that cannot be integrated into the grid is effectively utilized through the technical route of ammonia production-combustion-generator power generation-grid connection, which is conducive to the popularization and widespread use of green electricity generation methods and responds to the country's dual carbon goals;

[0042] (2) The present invention directly uses nitrogen and water to produce ammonia by electrocatalysis, which is safer than producing hydrogen by electrolysis of water;

[0043] (3) The ammonia produced by the electrocatalytic ammonia production method of the present invention has lower storage and transportation costs than hydrogen. Ammonia can not only be used as a fuel for ammonia combustion, but can also be directly transported to the outside world as a product;

[0044] (4) The present invention directly uses ammonia combustion to eliminate the process of ammonia cracking to produce hydrogen and then using hydrogen as internal combustion engine fuel, thereby reducing system operating costs; traditional fossil fuels are carbon-containing fuels and produce carbon emissions after combustion. Under the national dual carbon goals, using ammonia as fuel instead of traditional fossil fuels can effectively eliminate carbon emissions;

[0045] (5) The post-treatment device in the present invention can efficiently treat combustion pollutants. The final products of the post-treatment are nitrogen and water. The water can be recycled after condensation and passed into the electrocatalytic ammonia production device to participate in the ammonia production reaction again, realizing a semi-closed circulation system with zero carbon clean emissions. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 Schematic diagram of the structure of a green electricity energy conversion system based on electrocatalytic ammonia production and ammonia combustion in an embodiment of the present invention.

[0047] Description of the marks in the figure:

[0048] 1—electrocatalytic ammonia production device, 2—ammonia storage device, 3—oxygen storage device, 4—combustion device, 5—generator, 6—post-processing device. DETAILED DESCRIPTION

[0049] The present invention is described in detail below with reference to specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0050] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like, indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific direction, be constructed, or operate in a specific direction. Therefore, they should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like, used to describe common objects, merely refer to different instances of the same object and are not intended to imply that the objects described must be in a given order, whether temporally, spatially, or in any other manner.

[0051] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0052] Example:

[0053] A green electricity energy conversion system based on electrocatalytic ammonia production and ammonia combustion, such as Figure 1 As shown, it includes an electrocatalytic ammonia production device 1, a combustion device 4, a generator 5 and a post-processing device 6. The electrocatalytic ammonia production device 1, the combustion device 4 and the post-processing device 6 are connected in a circular manner, and the generator 5 is connected to the combustion device 4;

[0054] The electrocatalytic ammonia production device 1 uses green electricity as the power source for electrocatalytic ammonia production. The combustion device 4 uses the produced ammonia (NH3) as fuel for ammonia combustion to drive the generator 5. The post-processing device 6 processes the combustion exhaust of the combustion device 4 to obtain nitrogen (N2) and water (H2O) as products. The water is condensed and circulated into the electrocatalytic ammonia production device 1 to participate in electrocatalytic ammonia production again.

[0055] Green electricity is selected from one or more of wind power generation and photovoltaic power generation, and in this embodiment, wind power generation and photovoltaic power generation are preferred;

[0056] The electrocatalytic ammonia production device 1 is generally installed near the area where green electricity is located. The electricity generated by green electricity is directly electrocatalytically produced into ammonia, which is convenient for local use of green electricity.

[0057] The electrocatalytic ammonia production device 1 uses water and nitrogen to generate ammonia and oxygen (O2) through electrocatalysis. The chemical reaction formula of electrocatalytic ammonia production is 2N2+6H2O=4NH3+3O2;

[0058] The water used in the electrocatalytic ammonia production device 1 is selected from one or more of water introduced from the outside and condensed water circulated in the system. In this embodiment, water introduced from the outside is used when the system is started, and condensed water circulated in the system is used during operation. When the condensed water is insufficient, water introduced from the outside is supplemented.

[0059] The nitrogen used in the electrocatalytic ammonia production device 1 is nitrogen introduced from the outside;

[0060] Electrocatalysis is performed using a positive electrode and a negative electrode inserted into an electrolyte;

[0061] The positive electrode is usually made of platinum (Pt) or graphite, and in this embodiment, platinum is preferred;

[0062] The negative electrode is usually made of Fe-Fluorine doped tin oxide glass (Fe-FTO glass) or Fe-Nickel foam. In this embodiment, Fe-Fluorine doped tin oxide glass is preferred.

[0063] The electrolyte is usually [P 6,6,6,14 ][eFAP] ionic liquid or [C4mpyr][eFAP] ionic liquid, preferably [P 6,6,6,14 ][eFAP]ionic liquid;

[0064] The ammonia and oxygen obtained by the electrocatalytic ammonia production device 1 are separated by cooling and pressurization, and then liquefied and stored in the ammonia storage device 2 and the oxygen storage device 3 respectively;

[0065] Ammonia storage device 2 uses a liquid ammonia tank, and oxygen storage device 3 uses an oxygen tank;

[0066] The ammonia gas in the ammonia storage device 2 is used as fuel for ammonia combustion or is directly transported as a chemical raw material, kiln fuel, or fuel cell raw material for the production of other chemical products in chemical plants;

[0067] The combustion device 4 uses stored ammonia and oxygen as fuel and oxidant for ammonia combustion. Ammonia is introduced into the combustion device 4 to burn and drive the generator 5 to work. However, since ammonia has poor combustion characteristics, the produced oxygen can also be introduced into the combustion device 4 to promote the combustion of the ammonia fuel and improve the combustion efficiency of the combustion device 4.

[0068] The combustion device 4 is selected from one or more of an ammonia fuel engine, an ammonia fuel gas turbine, and a boiler. In this embodiment, the combustion device 4 is preferably an ammonia fuel engine.

[0069] The electricity generated by the generator 5 is fed into the grid;

[0070] The post-processing device 6 can treat unburned ammonia, nitrogen oxides (NO x ) and nitrous oxide (N2O) and other combustion emissions are catalytically decomposed, usually requiring the integration of multiple catalysts, the post-treatment device 6 is selected from one or more of a selective catalytic reduction device (SCR), an ammonia slip catalyst (ASC), an ammonia oxidation catalyst (AOC), and a nitrous oxide decomposition catalyst (DeN2O). In this embodiment, it is preferred that a selective catalytic reduction device, an ammonia slip catalyst, and a nitrous oxide decomposition catalyst are connected in series to ensure that the combustion emissions can be efficiently reduced to nitrogen and water;

[0071] The catalyst of the selective catalytic reduction device is generally a molecular sieve, such as a copper (Cu)-based molecular sieve, an iron (Fe)-based molecular sieve or a manganese (Mn)-based molecular sieve. In this embodiment, an iron-based molecular sieve is preferred;

[0072] The catalyst of the ammonia slip catalyst is generally made of a noble metal alloy, such as a silver-copper alloy, or a noble metal oxide, such as platinum oxide, palladium oxide or rhodium oxide. In this embodiment, platinum oxide is preferably used;

[0073] The catalyst of the ammonia oxidation catalyst is generally made of precious metal alloys, such as Pt / CeZrO2 or Ni-doped Pt / Ce-Zr;

[0074] The catalyst of the nitrous oxide decomposition catalyst is generally made of metal, such as copper, iron, nickel (Ni), indium (In), palladium (Pd), ruthenium (Ru) or rhodium (Rh). Precious metals have better effects, such as palladium, ruthenium or rhodium. In this embodiment, palladium is preferred.

[0075] The nitrogen generated by the post-processing device 6 is discharged to the outside or stored in a nitrogen storage device. In this embodiment, the nitrogen is discharged to the outside.

[0076] A green electricity energy conversion method based on electrocatalytic ammonia production and ammonia combustion uses the above system to perform green electricity energy conversion. The specific steps are as follows:

[0077] The electrocatalytic ammonia production device 1 uses green electricity as the source of electricity for electrocatalytic ammonia production, and uses water and nitrogen as raw materials for electrocatalytic ammonia production. The electrocatalytic ammonia production obtains ammonia and oxygen as products, and the produced ammonia and oxygen are stored in a storage device. The combustion device 4 uses the produced ammonia and oxygen as fuel and oxidant for ammonia combustion, and uses the energy of ammonia combustion to drive the generator 5 to work. The electricity generated by the generator 5 is incorporated into the power grid. The post-processing device 6 processes the combustion emissions of the combustion device 4, and the post-processing obtains nitrogen and water as products. After condensation, the water is circulated into the electrocatalytic ammonia production device 1 to participate in the electrocatalytic ammonia production again.

[0078] The above description of the embodiments is intended to facilitate understanding and use of the invention by those skilled in the art. It will be apparent that those skilled in the art can readily make various modifications to these embodiments and apply the general principles described herein to other embodiments without requiring inventive effort. Therefore, the present invention is not limited to the above-described embodiments. Improvements and modifications made by those skilled in the art based on the disclosure of the present invention, without departing from the scope of the present invention, should be within the scope of protection of the present invention.

Claims

1. A green electricity energy conversion system based on electrocatalytic ammonia production and ammonia combustion, characterized in that: The system comprises an electrocatalytic ammonia production device (1), a combustion device (4), a generator (5) and a post-processing device (6), wherein the electrocatalytic ammonia production device (1), the combustion device (4) and the post-processing device (6) are connected in a cycle in sequence, and the generator (5) is connected to the combustion device (4); The electrocatalytic ammonia production device (1) uses green electricity as a source of electric energy for electrocatalytic ammonia production, the combustion device (4) uses the produced ammonia as a fuel for ammonia combustion to drive the generator (5) to work, and the post-treatment device (6) treats the combustion exhaust of the combustion device (4) to obtain nitrogen and water as products, which are condensed and circulated into the electrocatalytic ammonia production device (1) to participate in the electrocatalytic ammonia production again.

2. A green electricity energy conversion system based on electrocatalytic ammonia production and ammonia combustion according to claim 1, characterized in that: The green electricity is selected from one or more of wind power generation and photovoltaic power generation.

3. A green electricity energy conversion system based on electrocatalytic ammonia production and ammonia combustion according to claim 1, characterized in that: The electrocatalytic ammonia production device (1) uses water and nitrogen to generate ammonia and oxygen in an electrocatalytic manner.

4. A green electricity energy conversion system based on electrocatalytic ammonia production and ammonia combustion according to claim 3, characterized in that: Electrocatalysis is performed using a positive electrode and a negative electrode inserted into an electrolyte.

5. A green electricity energy conversion system based on electrocatalytic ammonia production and ammonia combustion according to claim 4, characterized in that: The positive electrode is made of platinum or graphite, the negative electrode is made of iron-fluorine doped tin oxide glass or iron-nickel foam metal, and the electrolyte is [P 6,6,6,14 ][eFAP] ionic liquid or [C4mpyr][eFAP] ionic liquid.

6. A green electricity energy conversion system based on electrocatalytic ammonia production and ammonia combustion according to claim 3, characterized in that: The ammonia and oxygen obtained by the electrocatalytic ammonia production device (1) are separated by cooling and pressurizing, and then liquefied and stored in an ammonia storage device (2) and an oxygen storage device (3) respectively.

7. A green electricity energy conversion system based on electrocatalytic ammonia production and ammonia combustion according to claim 6, characterized in that: The combustion device (4) uses the stored ammonia and oxygen as fuel and oxidant for ammonia combustion.

8. The green electricity energy conversion system based on electrocatalytic ammonia production and ammonia combustion according to claim 1 is characterized in that: The combustion device (4) is selected from one or more of an ammonia fuel engine, an ammonia fuel gas turbine, and a boiler.

9. The green electricity energy conversion system based on electrocatalytic ammonia production and ammonia combustion according to claim 1, characterized in that: The post-treatment device (6) is selected from one or more of a selective catalytic reduction device, an ammonia slip catalyst, an ammonia oxidation catalyst, and a nitrous oxide decomposition catalyst.

10. A green electricity energy conversion method based on electrocatalytic ammonia production and ammonia combustion, characterized in that: The method uses the system according to any one of claims 1 to 9 to perform green electricity energy conversion, and the method comprises the following steps: The electrocatalytic ammonia production device (1) uses green electricity as the source of electric energy for electrocatalytic ammonia production, uses water and nitrogen as raw materials for electrocatalytic ammonia production, and obtains ammonia and oxygen as products through electrocatalytic ammonia production. The obtained ammonia and oxygen are stored in a storage device. The combustion device (4) uses the obtained ammonia and oxygen as fuel and oxidant for ammonia combustion, and uses the energy of ammonia combustion to drive the generator (5) to work. The electricity generated by the generator (5) is connected to the power grid. The post-treatment device (6) treats the combustion emissions of the combustion device (4), and obtains nitrogen and water as products through post-treatment. After the water is condensed, it is circulated into the electrocatalytic ammonia production device (1) to participate in the electrocatalytic ammonia production again.

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