Device for generating carbon material by direct air capture coupling hydrate method

Abstract

The utility model discloses a device for generating a carbon material by a direct air capture coupling hydrate method, which is characterized by comprising an absorption regeneration system, a hydration purification system and a photocatalytic cracking system which are sequentially arranged, the photocatalytic cracking system comprises a catalytic reactor, a photocatalytic xenon lamp, a discharge pipe, a CO2 connecting pipe and a first emptying pipe are arranged on the catalytic reactor, and the CO2 connecting pipe is connected with the discharge pipe. Ga-Sn alloy is arranged in the catalytic reactor, a first temperature control mechanism is arranged on the outer wall of the catalytic reactor, the CO2 connecting pipe is connected with the hydration purification system, a flow control meter and a valve are arranged on the CO2 connecting pipe, the discharging pipe is connected with a carbon material collecting box, and a transfer pump is arranged on the discharging pipe. The device disclosed by the utility model has the beneficial effects that a photocatalytic cracking method and a hydrate method are integrated, and a carbon material is directly generated from a direct air capture coupling hydrate method, so that efficient capture of carbon dioxide is realized, and cyclic utilization of the carbon material is realized.

Description

Technical Field

[0001] This utility model relates to the field of CO2 collection and utilization technology, and in particular to a device for generating carbon materials by direct air capture coupled with hydrate method. Background Technology

[0002] The hydrate method is a novel gas separation technology. Its separation principle utilizes the pressure difference between various gases and the gas hydrates formed by them. Components with lower pressure accumulate in the hydrate phase, while components with relatively higher pressure remain in the reactor, thus achieving the separation of the mixed gases. The hydrate method for CO2 separation is highly competitive due to its pollution-free, non-corrosive, simple process, and low energy consumption.

[0003] Photocatalytic CO2 reduction to produce valuable hydrocarbon fuels (such as formic acid, methane, ethanol, etc.) is an effective way to alleviate the dual pressures on the environment and energy. Compared with traditional thermocatalysis, it has advantages such as low energy consumption, mild reaction conditions and being green. There are two main effective ways to convert CO2 into high-value-added products through photocatalysis: one is a homogeneous reaction process and the other is an isomerization reaction process.

[0004] Currently, existing technologies lack the ability to combine the two methods mentioned above to generate carbon materials and achieve carbon material recycling. Therefore, it is necessary to provide a device for generating carbon materials by direct air capture coupled with hydrate method. Summary of the Invention

[0005] The purpose of this invention is to provide a device for generating carbon materials by direct air capture coupled with hydrate method, which achieves efficient capture of carbon dioxide, obtains a relatively stable compound form by using hydrate method, and realizes the recycling of carbon materials.

[0006] The objective of this utility model is achieved through the following technical solution:

[0007] A device for generating carbon materials via direct air capture coupled with hydrate method includes an absorption and regeneration system, a hydration purification system, and a photocatalytic cracking system arranged sequentially. The photocatalytic cracking system includes a catalytic reactor, which is equipped with a photocatalytic xenon lamp, a discharge pipe, a CO2 connecting pipe, and a first vent pipe. A Ga-Sn alloy is disposed inside the catalytic reactor, and a first temperature control mechanism is disposed on the outer wall of the catalytic reactor. The CO2 connecting pipe is connected to the hydration purification system and is equipped with a flow meter and a valve. The discharge pipe is connected to a carbon material collection box and is equipped with a pump.

[0008] Furthermore, the absorption and regeneration system includes an air compressor and an absorption and regeneration tower arranged in sequence. The absorption and regeneration tower is equipped with CO2 adsorption material, a second exhaust pipe, and a CO2 delivery pipe. The CO2 delivery pipe is connected to the hydration and purification system.

[0009] Furthermore, the hydration purification system includes a first gas storage tank, a booster pump, a buffer tank, a hydration tower, and a second gas storage tank arranged in sequence. The CO2 delivery pipe is connected to the inlet end of the first gas storage tank. The hydration tower is equipped with a liquid inlet pipe, a third vent pipe, and a CO2 enrichment pipe. The CO2 enrichment pipe is connected to the second gas storage tank. The CO2 connection pipe is connected to the outlet end of the second gas storage tank. A second temperature control mechanism is provided on the outer wall of the hydration tower.

[0010] Furthermore, the upper end of the catalytic reactor is provided with an electric telescopic rod, the lower end of which is located in the catalytic reactor and is provided with a carbon material collection hood, which is connected to the discharge pipe via a connecting hose.

[0011] Furthermore, the hydration tower is equipped with a first liquid recovery pipe, which is connected to a storage tank. The storage tank contains a DIOX thermodynamic accelerator solution, and the storage tank is equipped with an inlet pump connected to the inlet pipe.

[0012] Furthermore, the carbon material collection box is equipped with a carbon material circulation tank, and a filter plate is inclinedly installed in the carbon material collection box between the carbon material circulation tank and the discharge pipe. The carbon material circulation tank is connected to a liquid addition pipe and a second liquid recovery pipe, the second liquid recovery pipe is connected to the storage tank, and a stirring mechanism is installed in the carbon material circulation tank.

[0013] Furthermore, the CO2 delivery pipe is connected to a CO2 detector.

[0014] Furthermore, the CO2 enrichment tube and the catalytic reactor are connected to a gas chromatograph detector.

[0015] Furthermore, the CO2 enrichment pipe is connected to the booster pump via a gas circulation pipe.

[0016] This utility model has the following advantages:

[0017] 1. By integrating photocatalytic cracking with the hydrate method, carbon materials are generated directly from direct air capture coupled with the hydrate method, achieving efficient capture of carbon dioxide and recycling of carbon materials.

[0018] 2. The generated carbon materials can be recycled back into the hydrate reaction to promote the rapid formation and decomposition of carbon dioxide hydrates, improve the hydrate formation efficiency, and effectively reduce costs. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model.

[0020] In the diagram, 1-catalytic reactor, 2-photocatalytic xenon lamp, 3-discharge pipe, 4-CO2 connection pipe, 5-first vent pipe, 6-flow controller, 7-carbon material collection box, 8-feeding pump, 9-air compressor, 10-absorption regeneration tower, 11-second vent pipe, 12-CO2 delivery pipe, 13-first gas storage tank, 14-booster pump, 15-buffer tank, 16-hydration tower, 17-second gas storage tank, 18-liquid inlet pipe, 19-third vent pipe, 20-CO2 enrichment pipe, 21-first liquid recovery pipe, 22-storage tank, 23-liquid inlet pump, 24-CO2 detector, 25-gas circulation pipe, 26-electric telescopic rod, 27-carbon material collection hood, 28-gas chromatograph detector, 29-carbon material circulation tank, 30-filter plate, 31-second liquid recovery pipe. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0023] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0024] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0025] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0026] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] refer to Figure 1 As shown, one embodiment of this utility model is as follows:

[0028] A device for generating carbon materials via direct air capture coupled with hydrate method includes an absorption and regeneration system, a hydration purification system, and a photocatalytic cracking system arranged sequentially. The photocatalytic cracking system includes a catalytic reactor 1, which is equipped with a photocatalytic xenon lamp 2, a discharge pipe 3, a CO2 connecting pipe 4, and a first vent pipe 5. A Ga-Sn alloy is disposed inside the catalytic reactor 1, and a first temperature control mechanism is provided on the outer wall of the catalytic reactor 1. The CO2 connecting pipe is connected to the hydration purification system and is equipped with a flow meter 6 and a valve. The discharge pipe 3 is connected to a carbon material collection box 7 and is equipped with a pump 8.

[0029] The absorption and regeneration system includes an air compressor 9 and an absorption and regeneration tower 10 arranged in sequence. The absorption and regeneration tower 10 is equipped with CO2 adsorption material, a second exhaust pipe 11, and a CO2 delivery pipe 12. The CO2 delivery pipe 12 is connected to the hydration and purification system.

[0030] The absorption and regeneration system uses physical adsorption to enrich CO2 in the air. Specifically, the air compressor 9 blows air into the absorption and regeneration tower 10. The CO2 adsorption material in the absorption and regeneration tower 10 (metal-organic framework materials such as MOF, molecular sieves and porous nanomaterials such as activated carbon) absorbs CO2 in the air. The unabsorbed gas is discharged through the second exhaust pipe 11. When the absorbed CO2 reaches saturation, the air compressor is turned off, the CO2 is desorbed by heating, and the valve on the CO2 delivery pipe 12 is opened to discharge it to the hydration and purification system.

[0031] The hydration purification system utilizes the hydration reaction of CO2 to separate CO2 from impurity gases, thereby increasing the CO2 concentration. Specifically, it includes a first gas storage tank 13, a booster pump 14, a buffer tank 15, a hydration tower 16, and a second gas storage tank 17 arranged in sequence. The CO2 delivery pipe 12 is connected to the inlet end of the first gas storage tank 13. The hydration tower 16 is equipped with a liquid inlet pipe 18, a third vent pipe 19, and a CO2 enrichment pipe 20. The CO2 enrichment pipe 20 is connected to the second gas storage tank 17. The CO2 connection pipe 4 is connected to the outlet end of the second gas storage tank 17. A second temperature control mechanism is provided on the outer wall of the hydration tower 16.

[0032] Booster pump 14 pressurizes the CO2 gas to the pressure range required for the hydration reaction. After pressurization, the CO2 gas is stored in buffer tank 15 and then introduced into hydration tower 16. Hydration tower 16 is equipped with a magnetically coupled mechanical stirring mechanism to agitate the materials. CO2 reacts with the liquid to form CO2 hydrate. During the hydration reaction, the valves on the third exhaust pipe 19 and the CO2 enrichment pipe 20 are closed, and a DIOX thermodynamic accelerator solution is added to the hydration tower. The mixture is dissolved and stirred at 273K using the stirring mechanism. Stirring is stopped once the pressure stabilizes. The hydration tower is cooled down, at which point solid CO2 hydrate is formed inside. Impurity gases such as nitrogen and oxygen do not participate in the hydration reaction and can therefore be vented through the third vent pipe 19. After venting, the valve on the third vent pipe 19 is closed, and the valve on the CO2 enrichment pipe 20 is opened. The CO2 hydrate inside the hydration tower is then heated to 298K by the second temperature control mechanism, causing it to decompose and reform into CO2 gas. This CO2 gas is then discharged through the CO2 enrichment pipe 20 and collected in the second gas storage tank 17 for storage. Repeating these steps allows for continuous purification of the captured CO2.

[0033] To accurately control the temperature and pressure inside the hydration tower, the top cover of the hydration tower is equipped with a 0.25MPa dual-range pressure gauge and a 22.5MPa safety explosion-proof valve. At the same time, thermocouple sheaths and K-type thermocouples are used to measure the temperature of the hydration tower.

[0034] In order to realize the recycling of the liquid in the hydration reaction, the hydration tower 16 is provided with a first liquid recovery pipe 21, which is connected to a storage tank 22. The storage tank 22 stores a DIOX thermodynamic promoter solution, and the storage tank 22 is equipped with an inlet pump 23 connected to the inlet pipe 18.

[0035] Accelerators can promote the hydration reaction of carbon dioxide. Traditional accelerators are mixed solutions of accelerators SDS and THF, which foam severely when stirred, making them unsuitable for industrial recycling and reuse. Therefore, the solution used in this application is a DIOX thermodynamic accelerator solution, which can promote gas-liquid mass transfer, facilitate industrial recycling, achieve circular utilization, and thus reduce costs.

[0036] The CO2 delivery pipe 12 is connected to a CO2 detector 24, which can detect the concentration of CO2 captured by the absorption and regeneration system, thereby determining the capture effect of the absorption and regeneration system.

[0037] The CO2 enrichment pipe 20 is connected to the booster pump 14 via a gas circulation pipe 25. The purified CO2 is transported to the booster pump 2 through the gas circulation pipe 25, and after being pressurized by the booster pump 2, it re-enters the buffer tank 3 for repeated purification. After multiple purification processes, the CO2 concentration in the second gas storage tank 17 can reach over 98%.

[0038] The purified CO2 gas, controlled by a flow meter, enters the catalytic reactor 1 through the CO2 connecting pipe 4 at a flow rate of 30 mL / min. Under the action of the photocatalytic xenon lamp 2, it undergoes focused photolysis, with the light intensity controlled at 3 W / cm². 2 The first temperature control mechanism keeps the catalytic reactor above the melting temperature of the Ga-Sn alloy. The product obtained from concentrated photocatalytic CO2 cracking is an amorphous carbon material, in which metallic Ga and Sn are oxidized, and the product also contains oxides of Ga and Sn.

[0039] To improve CO2 conversion rate, the generated carbon material is discharged from the catalytic reactor during the reaction through the discharge pipe 3, allowing the reaction to proceed in the forward direction and ensuring sufficient contact between the gas and the molten Ga-Sn alloy. In practice, the electric telescopic rod 26 at the upper end of the catalytic reactor 1 intermittently descends during the reaction, bringing the lower end of the electric telescopic rod 26, the carbon material collection hood 17, close to the reaction liquid surface. Under the action of the pump 8, the reaction products enter the discharge pipe 3 through the connecting hose at the upper end of the carbon material collection hood 17 and are collected in the carbon material collection box.

[0040] During the collection of carbon materials, the valve on the CO2 connecting pipe 4 should be closed and the valve on the first vent pipe 5 should be opened to keep the catalytic reactor under normal pressure.

[0041] The CO2 enrichment tube 20 and the catalytic reactor 1 are connected to a gas chromatograph detector 28. As shown in the figure, valves are installed on the pipes connecting the CO2 enrichment tube 20 and the catalytic reactor 1 to the gas chromatograph detector 28. During gas detection, the valves control the separate detection. Specifically, the gas chromatograph detector 17 detects the concentration of purified CO2 in the CO2 enrichment tube to determine the purification effect; the gas chromatograph detector 17 also detects the CO2 concentration in the catalytic reactor 1 to determine the reaction progress.

[0042] The carbon material collection box 7 is equipped with a carbon material circulation tank 29. A filter plate 30 is inclinedly arranged in the carbon material collection box 7 between the carbon material circulation tank 29 and the discharge pipe 3. The carbon material circulation tank 30 is connected to a liquid addition pipe and a second liquid recovery pipe 31. The second liquid recovery pipe 31 is connected to the liquid storage tank 22. The carbon material circulation tank 20 is equipped with a stirring mechanism.

[0043] The carbon material entering the carbon material collection box passes through the filter plate 30 and is stored in the carbon material collection box, while the rest falls into the carbon material circulation pool 29. Since some carbon material is not separated from the metal, this part of the carbon material loaded on the metal oxide falls into the carbon material circulation pool 29 along with the metal oxide.

[0044] Since the generated carbon material is mainly amorphous carbon containing graphite, which is also a hydration reaction promoter, this application adds a DIOX thermodynamic promoter solution to the carbon material circulation tank through a liquid addition pipe. A stirring mechanism allows for the separation of some carbon material from the metal oxides, facilitating metal recovery and recycling. Simultaneously, the DIOX thermodynamic promoter solution, the carbon material in the liquid, and the small amount of metal oxides remaining therein are recycled into the storage tank 22 through the second liquid recovery pipe 31. The rapid heat conduction channels provided by the metal oxides, combined with the good thermal stability of the carbon material, form an efficient and stable heat transfer network, which is beneficial for the rapid formation and decomposition of carbon dioxide hydrates, improving the hydrate formation efficiency.

[0045] The feed end of the second liquid recovery pipe 31 should extend into the carbon material circulation tank 29 and be equipped with a filter screen or other filter components to prevent large particles of metal oxide from entering the pipe.

[0046] As shown in the figure, valves are installed on the connecting pipes between the various components of this utility model to control the opening and closing of the pipes. The first and second temperature control mechanisms are implemented using a jacketed high and low temperature circulating condenser.

[0047] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for producing carbon material by direct air capture coupled with hydrate method, characterized in that: The system includes an absorption and regeneration system, a hydration and purification system, and a photocatalytic cracking system arranged sequentially. The photocatalytic cracking system includes a catalytic reactor, which is equipped with a photocatalytic xenon lamp, a discharge pipe, a CO2 connection pipe, and a first vent pipe. The catalytic reactor contains a Ga-Sn alloy, and the outer wall of the catalytic reactor is equipped with a first temperature control mechanism. The CO2 connection pipe is connected to the hydration and purification system and is equipped with a flow meter and a valve. The discharge pipe is connected to a carbon material collection box and is equipped with a pump.

2. A device for producing carbon material by direct air capture coupled hydrate method according to claim 1, characterized in that: The absorption and regeneration system includes an air compressor and an absorption and regeneration tower arranged in sequence. The absorption and regeneration tower is equipped with CO2 adsorption material, a second vent pipe, and a CO2 delivery pipe. The CO2 delivery pipe is connected to the hydration and purification system.

3. The apparatus for generating carbon materials by direct air capture coupled with hydrate method according to claim 2, characterized in that: The hydration purification system includes a first gas storage tank, a booster pump, a buffer tank, a hydration tower, and a second gas storage tank arranged in sequence. The CO2 delivery pipe is connected to the inlet end of the first gas storage tank. The hydration tower is equipped with a liquid inlet pipe, a third vent pipe, and a CO2 enrichment pipe. The CO2 enrichment pipe is connected to the second gas storage tank. The CO2 connection pipe is connected to the outlet end of the second gas storage tank. A second temperature control mechanism is provided on the outer wall of the hydration tower.

4. The apparatus for generating carbon materials by direct air capture coupled with hydrate method according to claim 1, characterized in that: The upper end of the catalytic reactor is equipped with an electric telescopic rod, and the lower end of the electric telescopic rod is located in the catalytic reactor and is equipped with a carbon material collection hood. The carbon material collection hood is connected to the discharge pipe through a connecting hose.

5. The apparatus for generating carbon materials by direct air capture coupled with hydrate method according to claim 3, characterized in that: The hydration tower is equipped with a first liquid recovery pipe, which is connected to a storage tank. The storage tank is equipped with an inlet pump connected to the inlet pipe.

6. The apparatus for generating carbon materials by direct air capture coupled with hydrate method according to claim 5, characterized in that: The carbon material collection box is equipped with a carbon material circulation tank. A filter plate is inclinedly installed in the carbon material collection box between the carbon material circulation tank and the discharge pipe. The carbon material circulation tank is connected to a liquid addition pipe and a second liquid recovery pipe. The second liquid recovery pipe is connected to the storage tank. A stirring mechanism is installed in the carbon material circulation tank.

7. The apparatus for generating carbon materials by direct air capture coupled with hydrate method according to claim 2, characterized in that: The CO2 delivery pipe is connected to a CO2 detector.

8. The apparatus for generating carbon materials by direct air capture coupled with hydrate method according to claim 1, characterized in that: The CO2 enrichment tube and the catalytic reactor are connected to a gas chromatograph detector.

9. The apparatus for generating carbon materials by direct air capture coupled with hydrate method according to claim 3, characterized in that: The CO2 enrichment pipe is connected to the booster pump via a gas circulation pipe.

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