Air Carbon Dioxide Reduction and Organic Compound Synthesis Device Based on Photocatalysis and Solar Energy

Abstract

The present invention relates to an air carbon reduction and organic synthesis device based on photocatalysis and solar energy, comprising a gas separation system, an NH3 synthesis system, a supercritical CO2 conversion system, a photocatalytic supercritical CO2 reduction system, a product collection system, and a Fresnel high-concentration photothermal power generation system. The gas separation system is used to separate H2, N 2、 CO2 and H2O from the gas, and electrolyze H2O to generate H2; the NH3 synthesis system is connected to the gas separation system and is used to synthesize N2 and the generated H2 separated by the gas separation system into NH3; the supercritical CO2 conversion system is connected to the gas separation system and is used to convert the CO2 separated by the gas separation system into supercritical CO2; the photocatalytic supercritical CO2 reduction system is respectively connected to the supercritical CO2 conversion system and the NH3 synthesis system; the product collection system is connected to the photocatalytic supercritical CO2 reduction system. The present invention can sustainably convert CO2 in the atmosphere into various clean hydrocarbon fuels through photocatalysis based on air and using solar energy.

Description

Technical Field

[0001] The present invention relates to an air carbon reduction and organic synthesis device, and particularly to an air carbon reduction and organic synthesis device based on photocatalysis and solar energy. Background Art

[0002] The increase in the concentration of carbon dioxide in the atmosphere has disrupted the original balance among the various spheres of the earth, leading to ecological and environmental problems such as intensified greenhouse effect, extreme weather changes, and sea-level rise. With the continuous development of humanity, the energy and climate crises are getting closer and closer, and these ecological and environmental problems are closely related to people's production and life and are related to the fate of all mankind.

[0003] At the present stage, global fossil fuels are decreasing day by day, and solar energy, as a renewable energy source, has become an important part that cannot be ignored by mankind. The use of sunlight is not restricted by geography, can be directly developed and utilized, and does not require mining and transportation, which is very convenient; moreover, solar energy is one of the cleanest energy sources and does not pollute the environment.

[0004] As one of the most potential green and new technologies, photocatalysis technology can convert greenhouse gases such as carbon dioxide into high-value-added chemicals and fuels through solar energy, which is conducive to solving problems such as the shortage of fossil fuels and global environmental pollution, and has considerable economic effects. The photocatalyst does not consume other chemical substances during the reaction process, and uses water and oxygen in the air as raw materials, which is green, resource-saving, and pollution-free.

[0005] At the present stage, energy supply and demand tensions have frequently occurred in many countries around the world, the contradiction between energy supply and demand is prominent, and prices have continued to rise. Today, with the increasingly serious problem of energy shortage, it is very necessary to study an air carbon reduction and organic synthesis device based on photocatalysis and solar energy. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide an air carbon reduction and organic synthesis device based on photocatalysis and solar energy, which can continuously convert CO2 in the atmosphere into various clean hydrocarbon fuels by photocatalysis based on air and using solar energy.

[0007] To solve the above technical problem, the technical solution of the present invention is: an air carbon reduction and organic synthesis device based on photocatalysis and solar energy, comprising:

[0008] A gas separation system for separating H2, N 2、 CO2 and H2O in the gas, and electrolyzing H2O to generate H2;

[0009] An NH3 synthesis system connected to the gas separation system for synthesizing N2 and the generated H2 separated by the gas separation system into NH3;

[0010] A supercritical CO2 conversion system, connected to the gas separation system, for converting the CO2 separated by the gas separation system into supercritical CO2;

[0011] A photocatalytic supercritical CO2 reduction system, respectively connected to the supercritical CO2 conversion system and the NH3 synthesis system, for allowing NH3 and supercritical CO2 to mix therein and react under the catalysis of a photocatalyst to obtain products;

[0012] A product collection system, connected to the photocatalytic supercritical CO2 reduction system, for collecting the products;

[0013] A Fresnel high-concentration photothermal-electricity conversion system, concentrating light at least on the NH3 synthesis system and the photocatalytic supercritical CO2 reduction system to provide photothermal energy.

[0014] Further, the gas separation system includes:

[0015] A first water capture device, for capturing H2O in the air;

[0016] A second carbon dioxide capture device, connected to the first water capture device, for capturing CO2 in the gas in the air other than H2O, and connected to the supercritical CO2 conversion system to provide CO2 to the supercritical CO2 conversion system;

[0017] A nitrogen-oxygen separation device, connected to the second carbon dioxide capture device, for separating N2 in the gas in the air other than H2O and CO2, and connected to the NH3 synthesis system through an N2 collection chamber to provide N2 to the NH3 synthesis system;

[0018] An H2O electrolysis chamber, connected to the first water capture device through an H2O pipeline, for electrolyzing H2O to obtain H2, and connected to the NH3 synthesis system through an H2 collection chamber to provide H2 to the NH3 synthesis system;

[0019] A cooling device, for condensing gaseous H2O in the H2O pipeline.

[0020] Further, the first water capture device and the second carbon dioxide capture device respectively include:

[0021] A housing;

[0022] A gravity switch, installed in the middle part of the housing to divide the interior of the housing into an upper chamber and a lower chamber. After the gravity switch is opened under the action of gravity, the lower chamber and the upper chamber are connected;

[0023] A spiral coiled pipe is installed in the upper cavity for gas to flow through, and a plurality of leakage holes are provided on the lower side of the spiral coiled pipe;

[0024] A refrigerator is installed in the upper cavity;

[0025] A heating element is installed in the lower cavity.

[0026] Furthermore, the supercritical CO2 conversion system includes a conversion tank, the conversion tank is configured with a heat-assisted water injection layer, and a compressor is installed in the inner cavity of the conversion tank.

[0027] Furthermore, the photocatalytic supercritical CO2 reduction system includes:

[0028] A TiO2 alkali modification chamber, which is internally provided with a filter screen, the filter screen is adhered with TiO2 powder, the inlet of the TiO2 alkali modification chamber is connected to the NH3 synthesis system, and the outlet is connected to the alkali-modified TiO2 pipeline;

[0029] A first photocatalytic reaction chamber, and both ends are respectively connected to the alkali-modified TiO2 pipeline through a cyclotron;

[0030] A second photocatalytic reaction chamber is connected to the supercritical CO2 conversion system, and the Fresnel high-magnification concentrating photovoltaic-thermal conversion system is at least used to provide photothermal energy to the first photocatalytic reaction chamber and the second photocatalytic reaction chamber;

[0031] Two connecting pipes respectively connected between the first photocatalytic reaction chamber and the second photocatalytic reaction chamber, each of the two connecting pipes is configured with an air pump, and the flow directions of the air pumps on the two connecting pipes are opposite.

[0032] Furthermore, the product collection system includes:

[0033] A product collection chamber is connected to the photocatalytic supercritical CO2 reduction system;

[0034] A number of product collection containers connected to the bottom of the product collection chamber, and a filter screen is installed at the inlet of each product collection container.

[0035] Furthermore, in order to aerate small bubbles at the bottom of the product collection chamber to accelerate the molecular movement rate, the supercritical CO2 conversion system is connected to the bottom of the product collection chamber to provide supercritical CO2 to the product collection chamber.

[0036] Furthermore, the air carbon reduction and organic matter synthesis device based on photocatalysis and solar energy further includes a heat exchange system, and the heat exchange system is used to cool the pipeline for transporting the separated H2O in the gas separation system and heat the supercritical CO2 conversion system.

[0037] After adopting the above technical solution, the present invention is based on air and utilizes solar energy to continuously convert CO2 in the atmosphere into clean hydrocarbon fuels such as methane, methanol, and carbon monoxide through photocatalysis, alleviating energy tension and the greenhouse effect, and is of great significance for improving the energy structure, protecting the ecological environment, coping with climate change, and achieving sustainable economic and social development. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic structural diagram of the air carbon reduction and organic synthesis device based on photocatalysis and solar energy of the present invention;

[0039] Figure 2 It is a schematic structural diagram of the first carbon capture device and the second carbon capture device of the present invention;

[0040] Figure 3 It is a schematic structural diagram of the supercritical CO2 conversion system of the present invention;

[0041] Figure 4 It is a schematic structural diagram of the first photocatalytic reaction chamber and the second photocatalytic reaction chamber of the present invention;

[0042] Figure 5 It is a schematic structural diagram of the product collection system of the present invention;

[0043] Figure 6 It is a schematic structural diagram of the Fresnel high-concentration photothermal conversion system of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0044] In order to make the content of the present invention easier to be clearly understood, the present invention will be further described in detail below according to specific embodiments and in conjunction with the drawings.

[0045] As shown in Figure 1 , 2 , 3, 4, 5, 6, an air carbon reduction and organic synthesis device based on photocatalysis and solar energy includes:

[0046] A gas separation system 1 for separating H2, N 2、 CO2 and H2O in the gas, and electrolyzing H2O to generate H2;

[0047] An NH3 synthesis system 2 connected to the gas separation system 1 for synthesizing N2 and the generated H2 separated by the gas separation system 1 into NH3;

[0048] A supercritical CO2 conversion system 3 connected to the gas separation system 1 for converting the CO2 separated by the gas separation system 1 into supercritical CO2;

[0049] The photocatalytic supercritical CO2 reduction system 4 is respectively connected to the supercritical CO2 conversion system 3 and the NH3 synthesis system 2, and is used for supplying NH3 and supercritical CO2 to mix therein and react under the catalysis of a photocatalyst to obtain a product;

[0050] The product collection system 5 is connected to the photocatalytic supercritical CO2 reduction system 4 and is used for collecting the product;

[0051] The Fresnel high-concentration photothermal-electricity conversion system focuses light at least on the NH3 synthesis system 2 and the photocatalytic supercritical CO2 reduction system 4 to provide photothermal energy.

[0052] As Figure 1 shown, the gas separation system 1 includes:

[0053] The first carbon and water capture device 11 is used for capturing H2O in the air;

[0054] The second carbon and water capture device 12 is connected to the first carbon and water capture device 11, is used for capturing CO2 in the gas in the air other than H2O, and is connected to the supercritical CO2 conversion system 3 to provide CO2 to the supercritical CO2 conversion system 3;

[0055] The nitrogen and oxygen separation device 13 is connected to the second carbon and water capture device 12, is used for separating N2 in the gas in the air other than H2O and CO2, and is connected to the NH3 synthesis system 2 through the N2 collection chamber 14 to provide N2 to the NH3 synthesis system 2;

[0056] The H2O electrolysis chamber 15 is connected to the first carbon and water capture device 11 through an H2O pipeline, is used for electrolyzing H2O to obtain H2, and is connected to the NH3 synthesis system 2 through the H2 collection chamber 16 to provide H2 to the NH3 synthesis system 2;

[0057] The cooling device 17 is used for condensing the gaseous H2O in the H2O pipeline.

[0058] In this embodiment, the cooling device 17 is a liquid-cooled circulating water tank.

[0059] As Figure 1 、 2 shown, the first carbon and water capture device 11 and the second carbon and water capture device 12 respectively include:

[0060] The housing 111;

[0061] The gravity switch 112 is installed in the middle of the housing 111 to divide the inside of the housing 111 into an upper cavity and a lower cavity. After the gravity switch 112 is opened under the action of gravity, the lower cavity and the upper cavity are communicated;

[0062] The spiral coiled pipe 113 is installed in the upper cavity for gas to flow through therein, and a plurality of leakage holes are formed in the lower side of the spiral coiled pipe 113;

[0063] The cooler 114 is installed in the upper cavity;

[0064] The heating element 115 is installed in the lower cavity.

[0065] In this embodiment, the housing 111 is a heat-insulating housing, and the heating element 115 is an annular heating plate.

[0066] The nitrogen-oxygen separation device 13 is a mature existing technology. Here is one example. The nitrogen-oxygen separation device 13 includes a nitrogen-oxygen separation chamber and a plurality of groups of magnetic fan blades installed side by side in the nitrogen-oxygen separation chamber. After the gas enters the nitrogen-oxygen separation chamber, it is split into multiple strands, with each strand corresponding to a group of magnetic fan blades. O2 is output from one end due to paramagnetism, and N2 is output from the other end due to diamagnetism. The structure of the nitrogen-oxygen separation device 13 is not limited to this. Among the gases in the air other than H2O and CO2, it mainly includes N2 and O2. Since O2 has paramagnetism and N2 has diamagnetism, in the nitrogen-oxygen separation device 13, the magnetic fan blades separate O2 from N2; O2 is released into the atmosphere, and N2 is then led to the NH3 synthesis system 2.

[0067] As Figure 1 shown, the NH3 synthesis system 2 includes an NH3 synthesis chamber and an NH3 collection chamber connected to the NH3 synthesis chamber, and a compressor is installed in the NH3 synthesis chamber.

[0068] As Figure 1 、 4 shown, the supercritical CO2 conversion system 3 includes a conversion tank, and the conversion tank is configured with a heat-assisted water injection layer 31, and a compressor is installed in the inner cavity of the conversion tank.

[0069] In this embodiment, the conversion tank includes an outer wall of the tank and an inner wall of the tank, and the heat-assisted water injection layer 31 is a circumferential sandwich layer located between the outer wall of the tank and the inner wall of the tank.

[0070] As Figure 1 、 5 shown, the photocatalytic supercritical CO2 reduction system 4 includes:

[0071] The TiO2 alkali modification bin 41 is internally provided with a filter screen 42, and the filter screen 42 is adhered with TiO2 powder. The inlet of the TiO2 alkali modification bin 41 is connected to the NH3 synthesis system 2, and the outlet is connected to the alkali-modified TiO2 pipeline 43;

[0072] The first photocatalytic reaction chamber 44 is connected to the alkali-modified TiO2 pipeline 43 at both ends through a cyclotron 48;

[0073] A second photocatalytic reaction chamber 45 is connected to the supercritical CO2 conversion system 3, and the Fresnel high-concentration photothermal-electricity conversion system is at least used to provide photothermal energy to the first photocatalytic reaction chamber 44 and the second photocatalytic reaction chamber 45.

[0074] Two connecting pipes 46 are respectively connected between the first photocatalytic reaction chamber 44 and the second photocatalytic reaction chamber 45. Air pumps 47 are arranged on each of the two connecting pipes 46, and the flow directions of the air pumps 47 on the two connecting pipes 46 are opposite.

[0075] As Figure 1 、 6 shown, the product collection system 5 includes:

[0076] A product collection chamber 51 is connected to the photocatalytic supercritical CO2 reduction system 4.

[0077] Several product collection containers 52 are connected to the bottom of the product collection chamber 51, and a filter screen is installed at the inlet of each product collection container 52.

[0078] In this embodiment, the product collection system 5 further includes a PT integrated sensor 53 for monitoring the pressure and temperature in the product collection chamber 51.

[0079] As Figure 1 shown, the supercritical CO2 conversion system 3 is connected to the bottom of the product collection chamber 51 to provide supercritical CO2 to the product collection chamber 51.

[0080] As Figure 6 shown, the Fresnel high-concentration photothermal-electricity conversion system includes a fixed bracket 71, a Fresnel mirror I 72, a Fresnel mirror II 73, a Fresnel mirror III 74, a carrier platform I 75, a carrier platform II 76, a carrier platform III 77, and a solar panel 78. The Fresnel mirror I 72, the Fresnel mirror II 73, and the Fresnel mirror III 74 are arranged side by side and supported by the fixed bracket 71. The carrier platform I 75 carries the NH3 synthesis chamber, and the Fresnel mirror I 72 concentrates light on the NH3 synthesis chamber. The carrier platform II 76 carries the solar panel 78, and uses a battery storage box to supply power to the H2O electrolysis chamber 15. The solar panel 78 is electrically connected to the battery storage box to supply power to the battery storage box. The Fresnel mirror II 73 concentrates light on the solar panel 78. The carrier platform III 77 carries the first photocatalytic reaction chamber 44 and the second photocatalytic reaction chamber 45, and the Fresnel mirror III 77 concentrates light on the first photocatalytic reaction chamber 44 and the second photocatalytic reaction chamber 45.

[0081] As Figure 1As shown in the figure, the air carbon reduction and organic matter synthesis device based on photocatalysis and solar energy further includes a heat exchange system 6. The heat exchange system includes an energy storage tank, a heat-resistant oil pipe, a water pipe I, and a water pipe II. The energy storage tank is connected to the cooling device 17 in the gas separation system through the water pipe I. The energy storage tank, the water pipe I, and the cooling device 17 together form a circulating cooling loop. The energy storage water tank is connected to the heat-assisted water injection layer 31 through the water pipe II. The energy storage tank, the water pipe II, and the heat-assisted water injection layer 31 together form a circulating heat-assisted loop. The heat-resistant oil pipe passes through the bottom of the NH3 synthesis chamber in the NH3 synthesis system through the energy storage tank to form a circulating pipeline. The energy storage tank plays a pivotal role in the heat exchange of each cavity. In this embodiment, to better control the reaction temperature and reduce equipment loss caused by excessive high-concentration sunlight temperature, this heat exchange system introduces a heat-resistant oil pipe, which passes through the bottom of the NH3 synthesis chamber through the energy storage tank to effectively control the reaction temperature through heat exchange. When the light is insufficient, it can also provide heat for the reaction to ensure the sustainable progress of the reaction.

[0082] The working process of the technical solution involved in the above embodiment will be introduced in detail:

[0083] When the entire air carbon reduction and organic matter synthesis device based on photocatalysis and solar energy starts to work, air enters the horizontal spiral coil 113 in the first carbon and water capture device 11. The refrigerator 114 in the first carbon and water capture device 11 cools to -4°C, and the H2O in the air becomes solid. The solid H2O falls onto the gravity switch 112 through the leak holes on the spiral coil. When the solid H2O reaches a certain weight, the gravity switch 112 opens, and the solid H2O falls onto the lower heating element 115 while the gravity switch 112 closes. The heating element 115 heats the solid H2O into a gas, and at this time, the heat exchange system starts to work.

[0084] The liquid-cooled circulating water tank is a surrounding cavity, surrounded by the H2O pipeline, and is connected to the water pipe I through the energy storage tank to form a circulating cooling pipeline for condensing the gaseous H2O in the H2O pipeline.

[0085] When the gaseous H2O passes through the H2O pipeline section surrounded by the liquid-cooled circulating water tank, it is absorbed by the cold water in the liquid-cooled circulating water tank on the H2O pipeline and condensed into a liquid, and then flows to the H2O electrolysis chamber 15. In the H2O electrolysis chamber 15, H2O generates O2 at the electrolysis anode and is released into the atmosphere, and generates H2 at the cathode, which passes through the H2 collection chamber 16 to the NH3 synthesis chamber.

[0086] In the second carbon and water capture device 12, the refrigerator 114 cools to -80°C, and the CO2 in the gas from the first carbon and water capture device 11 becomes solid and falls. The solid CO2 is then heated to a gas at the bottom and then passes through to the conversion tank. The remaining gas in the second carbon and water capture device 12 then passes through to the nitrogen and oxygen separation device 13.

[0087] Since O2 is paramagnetic and N2 is diamagnetic, the nitrogen-oxygen separation device 13 separates O2 and N2. O2 is released into the atmosphere, and N2 is sent to the NH3 synthesis chamber through the N2 collection chamber 14;

[0088] In the NH3 synthesis chamber carried by the carrier platform I 75 in the Fresnel high-concentration solar thermoelectric conversion system, when the temperature is raised to about 500 °C by the Fresnel mirror I 72 above and the pressure in the NH3 synthesis chamber is controlled by the compressor at 35 MPa, N2 and H2 react to synthesize NH3, which is then sent to the NH3 collection chamber and further sent to the TiO2 alkali modification chamber 41 in the photocatalytic supercritical CO2 reduction system;

[0089] The TiO2 alkali modification chamber 41 is internally provided with a filter screen 42 adhered with TiO2 powder. After NH3 from the NH3 collection chamber passes through the filter screen 42 in the TiO2 alkali modification chamber 41, the TiO2 surface carries NH3 basic molecules and is accelerated through the cyclotron 48 and sent into the first photocatalytic reaction chamber 44. At this time, the valves of the air pumps 47 on the two connecting pipes 46 are both in the closed state;

[0090] In the conversion box, the compressor controls the pressure in the conversion box at 7.4 MPa; the water pipe II is connected to the heat-assisted water injection layer 31 of the conversion box through the energy storage box to form a circulating heat-assisted loop to provide heat for the conversion box. When the temperature in the conversion box reaches 32 °C and the pressure in the cavity is 7.4 MPa, CO2 becomes supercritical CO2 and is sent to the second photocatalytic reaction chamber 45;

[0091] At this time, the valves of the air pumps 47 on the two connecting pipes 46 are opened; one air pump 47 accelerates the unidirectional flow of gas from the second photocatalytic reaction chamber 45 to the first photocatalytic reaction chamber 44; the other air pump 47 accelerates the unidirectional flow of gas from the first photocatalytic reaction chamber 44 to the second photocatalytic reaction chamber 45, thus forming a continuously accelerating counterclockwise air flow state in the two photocatalytic reaction chambers, enabling the supercritical CO2 in the second photocatalytic reaction chamber 45 to be fully mixed with the alkali-modified TiO2 in the first photocatalytic reaction chamber 44;

[0092] On the carrier platform III 77 of the Fresnel high-concentration solar thermoelectric conversion system, the Fresnel mirror focuses light on the first photocatalytic reaction chamber 44 and the second photocatalytic reaction chamber 45 to provide sufficient light and heat; the high-concentration light acts on the surface of the alkali-modified TiO2 in the first photocatalytic reaction chamber 44. The alkali-modified TiO2 absorbs photons to generate photo-generated electrons. At the same time, the cyclotrons 48 on both sides accelerate the alkali-modified TiO2 to generate a continuous high-speed counterflow air flow in the first photocatalytic reaction chamber 44, accelerating the molecular movement and increasing the molecular collision probability to improve the overall photocatalytic efficiency; on the surface of the alkali-modified TiO2 photocatalyst, CO2 is reduced to CO, CH4, HCOOH, and CH3OH, while H2O is oxidized to O2;

[0093] At this time, one of the air pumps 47 and the two cyclotrons 48 are turned off; after a period of time, when all the substances in the second photocatalytic reaction chamber 45 are sucked into the first photocatalytic reaction chamber 44, then the other air pump 47 (air pump I) is turned off. At this time, both air pumps 47 and the two cyclotrons 48 are in the off state;

[0094] The product collection chamber 51 is filled with water. The mixture in the first photocatalytic reaction chamber 44 is introduced into the product collection chamber 51 to form a mixed solution. At this time, supercritical CO2 from the conversion box is introduced into the product collection chamber 51 in the form of aeration small bubbles from the bottom of the product collection chamber 51 to accelerate the molecular movement rate. The aeration allows the supercritical CO2 to be fully mixed with the organic mixture, increases the reaction rate between the organic matter and the supercritical CO2, and plays an auxiliary reaction role; at the same time, the PT comprehensive sensor 53 monitors the pressure and temperature. The product collection chamber 51 is cooled or depressurized to reduce the solubility of the supercritical CO2, and the organic mixture can be precipitated, and the organic mixture is directly collected by the product collection container 52 below; the inlets of the four product collection containers 52 at the bottom of the product collection chamber 51 are all equipped with filters to intercept TiO2 solid residues, thereby completing the reduction of the photocatalytic supercritical CO2 and the collection of the products.

[0095] Taking the ideal embodiments of the present invention as described above as an inspiration, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this invention. The technical scope of this invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. An air carbon reduction and organic synthesis device based on photocatalysis and solar energy, characterized in that, It includes: A gas separation system (1) for separating H2, N 2、 CO2 and H2O from a gas, and electrolyzing H2O to generate H2; An NH3 synthesis system (2), connected to the gas separation system (1), for synthesizing N2 and generated H2 separated by the gas separation system (1) into NH3; A supercritical CO2 conversion system (3), connected to the gas separation system (1), for converting CO2 separated by the gas separation system (1) into supercritical CO2; A photocatalytic supercritical CO2 reduction system (4), connected to the supercritical CO2 conversion system (3) and the NH3 synthesis system (2) respectively, for allowing NH3 and supercritical CO2 to mix therein and react under the catalysis of a photocatalyst to obtain products; A product collection system (5), connected to the photocatalytic supercritical CO2 reduction system (4), for collecting products; A Fresnel high-concentration photothermal-electric conversion system, concentrating light at least on the NH3 synthesis system (2) and the photocatalytic supercritical CO2 reduction system (4) to provide photothermal energy; The photocatalytic supercritical CO2 reduction system (4) includes: A TiO2 alkali modification chamber (41), with a filter screen (42) inside, the filter screen (42) is adhered with TiO2 powder, the inlet of the TiO2 alkali modification chamber (41) is connected to the NH3 synthesis system (2), and the outlet is connected to an alkali-modified TiO2 pipeline (43); A first photocatalytic reaction chamber (44), with both ends connected to the alkali-modified TiO2 pipeline (43) through a cyclotron (48) respectively; A second photocatalytic reaction chamber (45), connected to the supercritical CO2 conversion system (3), the Fresnel high-concentration photothermal-electric conversion system is at least used to provide photothermal energy to the first photocatalytic reaction chamber (44) and the second photocatalytic reaction chamber (45); Two connecting pipes (46) respectively connected between the first photocatalytic reaction chamber (44) and the second photocatalytic reaction chamber (45), each connecting pipe (46) is equipped with an air pump (47), and the air pumps (47) on the two connecting pipes (46) have opposite flow directions.

2. The air carbon reduction and organic synthesis device based on photocatalysis and solar energy according to claim 1, characterized in that, The gas separation system (1) includes: A first carbohydrate capture device (11), for capturing H2O in the air; A second carbohydrate capture device (12), connected to the first carbohydrate capture device (11), for capturing CO2 in the gas other than H2O in the air, and connected to the supercritical CO2 conversion system (3) to provide CO2 to the supercritical CO2 conversion system (3); A nitrogen-oxygen separation device (13), connected to the second carbohydrate capture device (12), for separating N2 in the gas other than H2O and CO2 in the air, and connected to the NH3 synthesis system (2) through an N2 collection chamber (14) to provide N2 to the NH3 synthesis system (2); The H2O electrolysis chamber (15) is connected to the first carbon and water capture device (11) through an H2O pipeline, and is used for electrolyzing H2O to obtain H2, and is connected to the NH3 synthesis system (2) through an H2 collection chamber (16) to provide H2 to the NH3 synthesis system (2); The cooling device (17) is used for condensing gaseous H2O in the H2O pipeline.

3. The air carbon reduction and organic matter synthesis device based on photocatalysis and solar energy according to claim 2, wherein The first carbon and water capture device (11) and the second carbon and water capture device (12) respectively include: A housing (111); A gravity switch (112) installed in the middle of the housing (111) to divide the interior of the housing (111) into an upper chamber and a lower chamber. After the gravity switch (112) is opened under the action of gravity, the lower chamber and the upper chamber are connected; A spiral coil pipe (113) installed in the upper chamber for gas to flow through therein, and a plurality of leakage holes are provided on the lower side of the spiral coil pipe (113); A refrigerator (114) installed in the upper chamber; A heating element (115) installed in the lower chamber.

4. The air carbon reduction and organic matter synthesis device based on photocatalysis and solar energy according to claim 1, wherein The supercritical CO2 conversion system (3) includes a conversion tank, the conversion tank is configured with a heat-assisted water injection layer (31), and a compressor is installed in the inner cavity of the conversion tank.

5. The air carbon reduction and organic matter synthesis device based on photocatalysis and solar energy according to claim 1, wherein The product collection system (5) includes: A product collection chamber (51) connected to the photocatalytic supercritical CO2 reduction system (4); A number of product collection containers (52) connected to the bottom of the product collection chamber (51), and a filter screen is installed at the inlet of each product collection container (52).

6. The air carbon reduction and organic matter synthesis device based on photocatalysis and solar energy according to claim 5, wherein The supercritical CO2 conversion system (3) is connected to the bottom of the product collection chamber (51) to provide supercritical CO2 to the product collection chamber (51).

7. The air carbon reduction and organic matter synthesis device based on photocatalysis and solar energy according to claim 1, wherein It further includes a heat exchange system (6), and the heat exchange system (6) is used for cooling the pipeline for transporting the separated H2O in the gas separation system (1) and heating the supercritical CO2 conversion system (3).

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