Renewable energy driven nitrogen-carbon-hydrogen coupling fixation nitrogen fertilizer preparation device and method

Abstract

The invention discloses a renewable energy-driven nitrogen-carbon-hydrogen coupling fixation nitrogen fertilizer preparation device and method. On-site conversion of renewable energy and zero-carbon synthesis of nitrogen fertilizers (ammonia, ammonium nitrate, ammonium bicarbonate, urea and the like) can be realized under the condition that additional energy and material input are not needed. Energy management and system energy supply are achieved by means of renewable energy source driving and a flexible control technology, and materials such as carbon dioxide, nitrogen and water are continuously obtained from the environment based on a direct air trapping technology; the green nitrogen fertilizer is synthesized by direct selective catalytic conversion of inert nitrogen, oxygen, hydrogen and other materials by using a low-temperature plasma-electro-catalysis composite conversion system and equipment. According to the invention, stable and efficient synthesis of air into the nitrogen fertilizer with high added value is realized under the driving of renewable energy sources, so that instant green fertilizer and chemical supply is provided for remote areas such as high mountains, deserts and islands and areas lacking industrial foundations, and the method has a good application prospect.

Description

Technical Field

[0001] The present invention relates to a device and method for coupling and fixing nitrogen, carbon, and hydrogen to produce nitrogen fertilizer driven by renewable energy, which can be applied to distributed supply of nitrogen fertilizer or nitrogen cycle energy storage in remote areas, and belongs to the field of new energy application and engineering thermophysics. Background Art

[0002] With the growth of the population and the expansion of agricultural production, nitrogen fertilizer has become increasingly important in agricultural production, playing an irreplaceable role in increasing crop yields, improving soil quality, and ensuring food security. However, in some remote areas, especially mountainous areas, desert regions, or islands, etc., due to factors such as inconvenient transportation and high transportation costs, the supply of nitrogen fertilizer faces many challenges, restricting the development of industrial and agricultural production. In addition, the current large-scale artificial nitrogen fixation technology still uses the Haber-Bosch process from a hundred years ago, which requires high-temperature (~500°C) and high-pressure (~20 - 30 MPa) reaction conditions. Therefore, the global nitrogen fixation industry consumes 2% of the earth's energy every year. In the context of the era of developing new quality productivity, developing green and low-carbon nitrogen fixation technologies driven by renewable energy and efficient and distributed nitrogen fertilizer synthesis processes are urgent problems to be solved in the current artificial nitrogen cycle.

[0003] Although the current renewable energy-driven nitrogen fixation technologies are developing rapidly (such as electrocatalysis, photocatalysis, plasma catalysis, etc.), the distributed nitrogen fixation technology in actual application scenarios is still limited. The main reason is the limitation of energy and material supply. During the distributed nitrogen fixation process, remote areas often lack a mature energy supply system, and the continuous supply of materials such as high-purity nitrogen, high-purity hydrogen, and electrolyte also faces multiple dilemmas such as high transportation costs, limited transportation capacity, and difficulty in synthesizing materials in real time, making it difficult to achieve real-time energy supply and long-distance material transportation. At present, the levelized cost of distributed nitrogen fixation remains high, and the technical economy is poor. Therefore, solving the real-time in-situ supply of energy and materials in the nitrogen fixation process can greatly broaden the application prospects of distributed nitrogen fixation technology, promote the artificial nitrogen cycle, and contribute to the sustainable development of agricultural production. Summary of the Invention

[0004] The object of the present invention is to provide a device and method for nitrogen-carbon-hydrogen coupled fixation to produce nitrogen fertilizer driven by renewable energy, which can achieve distributed nitrogen fertilizer synthesis without additional energy and material input. The green power supply module obtains electric energy from sunlight to provide continuous electric energy supply for the whole device; the material capture module is driven by solar energy and can directly capture key reactants such as water, nitrogen, oxygen, carbon dioxide, etc. from the air; various reaction raw materials are selectively converted in the catalytic conversion module to achieve efficient synthesis of high-value-added nitrogen fertilizer. The whole process does not require additional electric energy input and material supply, directly obtaining energy and materials from sunlight and air, and has the advantages of starting and stopping immediately, high nitrogen fixation activity, and good long-term stability.

[0005] The object of the present invention is achieved by the following technical solutions: A device for nitrogen-carbon-hydrogen coupled fixation to produce nitrogen fertilizer driven by renewable energy, which includes a green power supply module, a material capture module, and a catalytic conversion module; The green power supply module includes an energy collection sub-module, a power conversion sub-module, and an energy storage control sub-module, which obtains energy from sunlight and ensures stable, efficient energy management and flexible control within the system; the energy collection sub-module collects energy from renewable energy with the help of solar photovoltaic panels; the power conversion sub-module conducts AC-DC conversion with the help of an inverter and a rectifier to achieve real-time optimization and dynamic regulation of energy; the energy storage control sub-module stores the surplus energy during the day with batteries to cope with stable power supply under intermittent energy input; The material capture module includes a material transport sub-module, a water extraction sub-module, and a carbon dioxide extraction sub-module, which obtains nitrogen source, oxygen source, carbon source, and hydrogen source from the air; the material transport sub-module is responsible for the introduction and distribution of target substances in the air to ensure the stable operation of the subsequent extraction process; the water extraction sub-module uses temperature difference drive to promote the adsorption and desorption of water molecules on the water-absorbing material, and collects the condensate as electrolyte; the carbon dioxide extraction sub-module also relies on temperature difference drive technology to regulate the reversible adsorption-desorption process of carbon dioxide molecules on the adsorption material to achieve efficient enrichment and transport it to the downstream reaction system as a key reaction gas; The catalytic conversion module includes a non-thermal plasma sub-module and an electrolytic cell sub-module, which converts carbon, nitrogen, oxygen, and hydrogen sources into liquid nitrogen fertilizer; the non-thermal plasma sub-module excites the remaining gas from which water and carbon dioxide have been extracted in the material capture module to the vibrational state, and after collision dissociation, forms nitrogen oxides with a low activation energy barrier; the electrolytic cell sub-module co-catalytically converts nitrogen oxides, carbon dioxide, and water to form a liquid nitrogen fertilizer rich in ammonium nitrate, ammonium bicarbonate, and urea.

[0006] Further, the water extraction sub-module in the material capture module consists of a hygroscopic material membrane, a reflector, a condensation housing, and a drain pipe. The hygroscopic material membrane captures and enriches moisture from the air. The reflector prevents the moisture from volatilizing and dissipating from the water extraction sub-module. The condensation housing condenses the water vapor into liquid water, and the drain pipe transports the moisture to the downstream for reaction.

[0007] Further, the hygroscopic material membrane of the material capture and supply module is composed of a hygroscopic material and a composite membrane. The hygroscopic material includes one or more of zeolite molecular sieve, porous activated carbon, metal-organic framework, nano-aluminum oxide, magnesium sulfate, calcium chloride, and lithium chloride. The composite membrane is one of polytetrafluoroethylene membrane, polyethylene membrane, or polyethylene terephthalate membrane.

[0008] Further, the carbon dioxide extraction sub-module in the material capture module consists of a carbon dioxide adsorption material membrane, a concentrator, a housing, and a gas pipeline. The carbon dioxide adsorption material membrane captures and enriches carbon dioxide from the air. The concentrator heats the carbon dioxide adsorption material membrane to the carbon dioxide desorption temperature. The housing prevents the carbon dioxide from dissipating, and the gas pipeline transports the carbon dioxide gas to the downstream for reaction.

[0009] Further, the carbon dioxide adsorption material membrane of the material capture and supply module is composed of a carbon dioxide adsorption material and a composite membrane. The carbon dioxide adsorption material includes one or more of zeolite molecular sieve, metal-organic framework, and covalent organic framework. The composite membrane is one of polytetrafluoroethylene membrane or polyethylene membrane.

[0010] Further, the low-temperature plasma sub-module in the catalytic conversion module consists of a high-voltage electrode, a grounded electrode, and a reactor housing. The high-voltage electrode and the grounded electrode form a discharge breakdown for dissociating and activating the gas. The reactor housing is used for fixing, sealing, and material transportation.

[0011] Further, the discharge characteristics of the low-temperature plasma sub-module are input voltage regulation, carrier gas regulation, or discharge gap regulation. The input voltage regulation range is 5000 kV to 7000 kV, the carrier gas regulation is 0.2 L / min to 5 L / min, and the discharge gap regulation is 1 mm to 3 mm.

[0012] Further, the electrolytic cell sub-module in the catalytic conversion module consists of a cathode plate, an anode plate, a cathode electrode, an anode electrode, an ion exchange membrane, and a gasket. The material is transported in the flow channels of the cathode and anode plates. An electrocatalytic reaction occurs at the interface between the cathode electrode and the anode electrode. The ion exchange membrane is used to separate the two electrodes and maintain the ion transport path. The gasket is used to seal the device.

[0013] Further, the cathode potential of the electrolytic cell sub-module is 0 to -1.2 V vs. RHE, and the catalyst type is one of copper nanoparticles, cobalt nanoparticles, nickel nanoparticles, copper-nickel alloy or copper-cobalt alloy.

[0014] On the other hand, the present invention also provides a method for coupling and fixing nitrogen, carbon and hydrogen to produce nitrogen fertilizer driven by renewable energy, which comprises the following steps: (1) In the green power supply module, the energy collection sub-module converts solar energy into electric energy, and the power conversion sub-module converts the fluctuating electric energy into alternating current required by the reaction device. The surplus electric energy is temporarily stored through the energy storage control sub-module for system power supply at night or when the light is insufficient. The power conversion sub-module and the energy storage control sub-module cooperate and match to achieve two-way regulation of power consumption and power storage, forming flexible control of the fluctuating energy source; (2) In the material capture and supply module, air is transported in the device through the material transport sub-module. Upstream of the transport, it passes through the water extraction sub-module and the carbon dioxide extraction sub-module to capture and enrich the moisture and carbon dioxide in the air. After being condensed into liquid water and gaseous pure carbon dioxide, they are introduced into the electrolytic cell sub-module in the catalytic conversion module as reaction gas sources and electrolytes; The air from which water and carbon dioxide have been extracted continues to be transported by the material transport sub-module to the low-temperature plasma sub-module in the catalytic conversion module as reaction gas; (3) The low-temperature plasma sub-module in the catalytic conversion module vibrates and excites nitrogen and oxygen under suitable discharge characteristics. After dissociation, the active nitrogen and oxygen species will freely recombine to form nitrogen oxides. The nitrogen oxides are introduced into the electrolytic cell sub-module in the catalytic conversion module and react with carbon dioxide in the electrolyte to achieve directional conversion to liquid nitrogen fertilizer by regulating the cathode potential and catalyst type.

[0015] The advantages of the present invention are as follows: (1) Real-time material supply. A nitrogen fertilizer electrochemical synthesis device and method provided by the present invention that do not require material input directly obtain the nitrogen, carbon, and hydrogen species required for synthesizing nitrogen fertilizer from the air, avoiding the transportation and supply of raw materials and facilitating the popularization of distributed nitrogen fixation technology in remote areas; (2) Excellent catalytic performance. A nitrogen fertilizer electrochemical synthesis device and method provided by the present invention use low-temperature plasma-electrocatalytic composite catalysis to avoid the energy barrier in the process of activating chemical bonds in traditional electrocatalysis, and can achieve high-activity and high-selectivity nitrogen fertilizer synthesis.

[0016] (3) Good environmental effect. A nitrogen fertilizer electrochemical synthesis device and method provided by the present invention realize nitrogen fertilizer synthesis with zero carbon emissions under normal temperature and pressure environment, with flexible deployment, clean and pollution-free, and having broad prospects for sustainable application. Description of the Drawings

[0017] Figure 1 Overall schematic diagram of the device; Figure 2 Schematic diagram of the water extraction sub-module; Figure 3 Schematic diagram of the carbon dioxide extraction sub-module; Figure 4 Schematic diagram of a single reactor in the low-temperature plasma sub-module; Figure 5 Schematic diagram of a single electrode in the electrolyzer sub-module. Specific implementation manners

[0018] The following further elaborates on the specific implementation manners of the present invention in conjunction with the accompanying drawings.

[0019] As Figure 1 shown, the present invention provides a nitrogen-carbon-hydrogen coupling fixed nitrogen fertilizer production device and method driven by renewable energy, realizing the electrochemical synthesis of nitrogen fertilizer without material input. It includes an energy collection sub-module 1 (mainly composed of photovoltaic panels), an energy storage control sub-module 2 (mainly composed of energy storage batteries), a power conversion sub-module 3 (mainly composed of inverters), a carbon dioxide extraction sub-module 4, a water extraction sub-module 5, a material transportation sub-module 6, a low-temperature plasma sub-module 7 (mainly composed of a plasma power supply and a plasma reactor), and an electrolyzer sub-module 8 (mainly composed of a DC power supply and an electrolyzer). The energy collection sub-module 1, the energy storage control sub-module 2, and the power conversion sub-module 3 constitute a green power supply module; the carbon dioxide extraction sub-module 4, the water extraction sub-module 5, and the material transportation sub-module 6 constitute a material capture module; the low-temperature plasma sub-module 7 and the electrolyzer sub-module 8 constitute a catalytic conversion module.

[0020] In the green power supply module, the energy collection sub-module 1 is connected to the energy storage control sub-module 2 and the power conversion sub-module 3. Under normal operating conditions, electrical energy is collected by the energy collection sub-module 1, and after passing through the power conversion sub-module 3, the fluctuating electrical energy becomes the alternating current required by downstream electrical equipment to drive the operation of the entire equipment. When the supply of renewable energy is sufficient, a part of the energy is diverted into the energy storage control sub-module 2 for energy storage. When the energy supply is insufficient, the electrical energy in the energy storage control sub-module 2 is connected to the power conversion sub-module 3 to achieve flexible control of energy and stable operation of the entire system under the supply of fluctuating electrical energy.

[0021] As Figure 2As shown in the figure, the carbon dioxide extraction sub-module 4 in the material capture module is composed of a carbon dioxide capture sub-module housing 401, a carbon dioxide adsorption material membrane 402, a concentrator 403, and a gas pipeline 404. Air passes through the carbon dioxide adsorption material membrane 402, and the carbon dioxide in the air is captured and absorbed by the carbon dioxide adsorption material membrane 402. The concentrator 403 is irradiated by sunlight to heat the carbon dioxide adsorption material membrane 402. After the carbon dioxide is thermally desorbed, it is input into the carbon dioxide storage tank through the gas pipeline 404 to supply a carbon source for the catalytic conversion module.

[0022] As Figure 3 shown, the water extraction sub-module 5 in the material capture module is composed of a reflector 501, a moisture absorption material membrane 502, a condensation housing 503, and a drain pipe 504. At night, air passes through the moisture absorption material membrane 502, and the moisture in the air is captured and absorbed by the moisture absorption material membrane 502. During the day, the moisture absorption material membrane 502 is heated to volatilize the moisture, which condenses on the condensation housing 503. The reflector 501 prevents the moisture from being volatilized outside the water capture sub-module 5. The moisture is input into the water storage tank through the drain pipe 504, which can supply a hydrogen source for the catalytic conversion module.

[0023] As Figure 4 shown, the non-thermal plasma sub-module in the electrocatalytic conversion module is composed of an array of multiple plasma reactors connected in parallel. A single reactor is composed of a high-voltage electrode 701, a grounded electrode 702, a quartz dielectric 703, a non-thermal plasma sub-module gas inlet 704, and a non-thermal plasma sub-module gas outlet 705. Air enters the non-thermal plasma reactor through the non-thermal plasma sub-module gas inlet 704. The high-voltage electrode 701 and the grounded electrode 702 form a dielectric barrier discharge breakdown under the block of the quartz dielectric 703, converting the air into nitrogen oxides, which are transported to the electrolytic cell sub-module 7 through the non-thermal plasma sub-module gas outlet 705.

[0024] As Figure 5 shown, the electrolytic cell sub-module in the electrocatalytic conversion module is composed of a stack of several single-piece membrane electrodes. A single-piece membrane electrode is composed of a cathode electrode 801, an ion exchange membrane 802, an anode electrode 803, a cathode plate 804, and an anode plate 805. The cathode plate 804 and the anode plate 805 are provided with in / out holes for gas-liquid transportation. In addition, there are serpentine flow channels inside to ensure sufficient mass transfer. During operation, gas-liquid enters the inside of the electrolytic cell through the cathode plate 804 and the anode plate 805, and a reaction occurs between the anode electrode 803 and the cathode plate 804. The ion exchange membrane 802 provides an ion-electron transport path and blocks the cross-transfer of substances. The produced nitrogen fertilizer is discharged through the outlets of the cathode plate 804 and the anode plate 805 and enters the nitrogen fertilizer storage tank.

[0025] Example 1: When ammonia is the target product, the valve between the water extraction sub-module 5 and the material transportation sub-module 6 can be opened, the valve between the carbon dioxide extraction sub-module 4 and the material transportation sub-module 6 can be closed, the valve for NO X +CO2 leading to the cathode in the electrolyzer sub-module 8 can be opened, and the valve for NO X +CO2 leading to the anode in the electrolyzer sub-module 8 can be closed. All other material transportation valves are in the open state. At this time, only the NO converted by the upstream low-temperature plasma sub-module 7 is introduced into the electrolyzer sub-module 8 X gas, and it is only introduced into the cathode for the reduction reaction, and the efficient synthesis of ammonia as a single product can be achieved.

[0026] Example 2: When ammonium nitrate is the target product: The valve between the water extraction sub-module 5 and the material transportation sub-module 6 can be opened, the valve between the carbon dioxide extraction sub-module 4 and the material transportation sub-module 6 can be closed, the valve for NO X +CO2 leading to the cathode in the electrolyzer sub-module 8 can be opened, and the valve for NO X +CO2 leading to the anode in the electrolyzer sub-module 8 can be opened. All other material transportation valves are in the open state. At this time, only the NO converted by the upstream low-temperature plasma sub-module 7 is introduced into the electrolyzer sub-module 8 X gas. This gas is reduced to ammonia at the cathode and oxidized to nitric acid at the anode, forming ammonium nitrate compound nitrogen fertilizer in the nitrogen fertilizer storage tank.

[0027] Example 3: When urea is the target product: The valve between the water extraction sub-module 5 and the material transportation sub-module 6 can be opened, the valve between the carbon dioxide extraction sub-module 4 and the material transportation sub-module 6 can be opened, the valve for NO X +CO2 leading to the cathode in the electrolyzer sub-module 8 can be opened, and the valve for NO X +CO2 leading to the anode in the electrolyzer sub-module 8 can be closed. All other material transportation valves are in the open state. At this time, the NO converted by the upstream low-temperature plasma sub-module 7 and the carbon dioxide captured in the carbon dioxide extraction sub-module 4 are introduced into the electrolyzer sub-module 8 X gas. This mixed gas is co-reduced at the cathode to achieve the stable synthesis of high-value-added urea.

[0028] Example 4: When carbon-based fuel is the target product: The valve between the water extraction sub-module 5 and the material transportation sub-module 6 can be opened, the valve between the carbon dioxide extraction sub-module 4 and the material transportation sub-module 6 can be opened, the valve for CO2 leading to the cathode in the electrolyzer sub-module 8 can be opened, the valve for CO2 leading to the anode in the electrolyzer sub-module 8 can be closed, and the valve for NO XThe anode valve in the electrolyzer sub-module 8, and the remaining material transport valves are all in the open state. At this time, only the carbon dioxide captured in the carbon dioxide extraction sub-module 4 is introduced into the electrolyzer sub-module 8. This gas undergoes a carbon dioxide reduction reaction at the cathode, enabling the selective synthesis of fuels such as syngas, ethylene, and ethanol.

[0029] The above embodiments are used to explain the present invention, rather than to limit the present invention. Any modifications and changes made to the present invention within the spirit and scope of the claims of the present invention fall within the protection scope of the present invention.

Claims

1. A nitrogen-carbon-hydrogen coupled fixed nitrogen fertilizer production device driven by renewable energy, characterized in that: The device includes a green electricity supply module, a material capture module and a catalytic conversion module; The green power supply module includes an energy collection submodule, a power conversion submodule and an energy storage control submodule, which are used to obtain energy from sunlight and realize energy management and flexible control; the energy collection submodule is used to collect energy from renewable energy through solar photovoltaic panels; the power conversion submodule is used to perform AC / DC conversion through inverters and rectifiers to realize real-time optimization and dynamic regulation of energy; the energy storage control submodule is used to use batteries to store daytime surplus energy to cope with stable energy supply under intermittent energy input; The material capture module includes a material transport submodule, a water extraction submodule and a carbon dioxide extraction submodule, which are used to obtain nitrogen source, oxygen source, carbon source and hydrogen source from the air; the material transport submodule is responsible for the introduction and distribution of target substances in the air; the water extraction submodule is used to promote the adsorption and desorption of water molecules on the water-absorbing material by temperature difference driving, and collect them as electrolyte after condensation; the carbon dioxide extraction submodule is used to use temperature difference driving technology to regulate the reversible adsorption-desorption process of carbon dioxide molecules on the adsorption material to achieve enrichment, and transport them to the downstream reaction system as reaction gas; The catalytic conversion module comprises a low-temperature plasma submodule and an electrolytic cell submodule, which are used to convert a carbon-nitrogen source, an oxygen source, a carbon source and a hydrogen source into liquid nitrogen fertilizer; the low-temperature plasma submodule is used to excite the remaining gas from which water and carbon dioxide have been extracted in the material capture module to a vibrational state, and to form nitrogen oxides with a low activation energy barrier after collision dissociation; the electrolytic cell submodule is used to form liquid nitrogen fertilizer rich in ammonium nitrate, ammonium bicarbonate and urea after co-catalytic conversion of nitrogen oxides, carbon dioxide and water.

2. The nitrogen-carbon-hydrogen coupled fixed nitrogen fertilizer production device driven by renewable energy according to claim 1, characterized in that: The water extraction submodule in the material capture module is composed of a hygroscopic material membrane, a reflector, a condensation shell and a drain pipe, wherein the hygroscopic material membrane captures and enriches moisture from the air, the reflector prevents moisture from volatilizing and dissipating from the water extraction submodule, the condensation shell condenses water vapor into liquid water, and the drain pipe transports the moisture to the downstream for reaction.

3. The nitrogen-carbon-hydrogen coupled fixed nitrogen fertilizer production device driven by renewable energy according to claim 2, characterized in that: The hygroscopic material membrane of the material capture and supply module is composed of a hygroscopic material and a composite membrane. The hygroscopic material includes one or more of zeolite molecular sieve, porous activated carbon, metal organic framework, nano-alumina, magnesium sulfate, calcium chloride and lithium chloride. The composite membrane is one of a polytetrafluoroethylene membrane, a polyethylene membrane or a polyethylene terephthalate membrane.

4. The nitrogen-carbon-hydrogen coupled fixed nitrogen fertilizer production device driven by renewable energy according to claim 1, characterized in that: The carbon dioxide extraction submodule in the material capture module consists of a carbon dioxide adsorption material membrane, a concentrator, a shell and a gas pipeline, wherein the carbon dioxide adsorption material membrane captures and enriches carbon dioxide from the air, the concentrator heats the carbon dioxide adsorption material membrane to the carbon dioxide desorption temperature, the shell prevents the dissipation of carbon dioxide, and the gas pipeline transports the carbon dioxide gas to the downstream for reaction.

5. The nitrogen-carbon-hydrogen coupled fixed nitrogen fertilizer production device driven by renewable energy according to claim 4, characterized in that: The carbon dioxide adsorption material membrane of the material capture and supply module is composed of a carbon dioxide adsorption material and a composite membrane. The carbon dioxide adsorption material includes one or more of zeolite molecular sieves, metal organic frameworks and covalent organic frameworks. The composite membrane is one of a polytetrafluoroethylene membrane or a polyethylene membrane.

6. The nitrogen-carbon-hydrogen coupled fixed nitrogen fertilizer production device driven by renewable energy according to claim 1, characterized in that: The low-temperature plasma submodule in the catalytic conversion module consists of a high-voltage electrode, a ground electrode and a reactor shell, wherein the high-voltage electrode and the ground electrode form a discharge breakdown for gas dissociation and activation, and the reactor shell is used for fixing, sealing and material transportation.

7. The nitrogen-carbon-hydrogen coupled fixed nitrogen fertilizer production device driven by renewable energy according to claim 6, characterized in that: The discharge characteristics of the low-temperature plasma submodule are input voltage adjustment, carrier gas adjustment or discharge spacing adjustment. The input voltage adjustment range is 5000 kV~7000 kV, the carrier gas adjustment is 0.2 L / min~5 L / min, and the discharge spacing adjustment is 1mm~3 mm.

8. The nitrogen-carbon-hydrogen coupled fixed nitrogen fertilizer production device driven by renewable energy according to claim 1, characterized in that: The electrolytic cell submodule in the catalytic conversion module consists of a cathode plate, an anode plate, a cathode electrode, an anode electrode, an ion exchange membrane and a gasket, wherein the material is transported in the flow channels in the anode and cathode plates; an electrocatalytic reaction occurs at the interface between the cathode electrode and the anode electrode; the ion exchange membrane is used to separate the two poles and maintain the ion transport path; and the gasket is used to seal the device.

9. The nitrogen-carbon-hydrogen coupled fixed nitrogen fertilizer production device driven by renewable energy according to claim 8, characterized in that: The cathode potential of the electrolytic cell submodule is 0~-1.2 V vs. RHE, and the catalyst type is one of copper nanoparticles, cobalt nanoparticles, nickel nanoparticles, copper-nickel alloy or copper-cobalt alloy.

10. A method for producing nitrogen fertilizer by nitrogen-carbon-hydrogen coupling fixation driven by renewable energy based on the device according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: (1) In the green power supply module, the energy collection submodule is used to convert solar energy into electrical energy, and the power conversion submodule converts the fluctuating electrical energy into the AC power required by the reaction device. The surplus electrical energy is temporarily stored by the energy storage control submodule and used for system power supply at night or when there is insufficient light. The power conversion submodule and the energy storage control submodule are coordinated and matched to realize the two-way regulation of power consumption and storage, forming a flexible control of fluctuating energy. (2) In the material capture and supply module, air is transported in the device through the material transport submodule, and the air passes through the water extraction submodule and the carbon dioxide extraction submodule upstream to capture and enrich the moisture and carbon dioxide in the air, condense them into liquid water and pure carbon dioxide in the gas phase, and then pass them into the electrolyzer submodule in the catalytic conversion module as a reaction gas source and electrolyte; the air from which water and carbon dioxide are extracted continues to be transported through the material transport submodule to the low-temperature plasma submodule in the catalytic conversion module as a reaction gas; (3) The low-temperature plasma submodule in the catalytic conversion module excites the vibration of nitrogen and oxygen under appropriate discharge characteristics. After dissociation, the active nitrogen and oxygen species will freely recombine to form nitrogen oxides. The nitrogen oxides are introduced into the electrolytic cell submodule in the catalytic conversion module and react with carbon dioxide in the electrolyte. By regulating the cathode potential and catalyst type, the directional conversion to liquid nitrogen fertilizer is achieved.

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