Device and method for in-situ deposition preparation of supported nano oxygen carriers by flame synthesis

Abstract

The present invention provides a device and method for in-situ deposition preparation of a supported nano-oxygen carrier by flame synthesis. It includes a three-dimensional translation stage and a deposition device. By using the above-mentioned preparation device, the preparation of supported nano-materials can be realized. The system combines the flame synthesis of nano-particles technology with the chemical vapor deposition technology, and can directly prepare in-situ a composite material loaded with active components of the nano-oxygen carrier. It can achieve precise control of the particle size distribution, morphology size and crystal phase purity of the supported nano-oxygen carrier particles, greatly expand the structure and components of the supported nano-oxygen carrier particle materials, significantly increase the yield of the supported nano-oxygen carrier particle materials, and can achieve industrial scale-up of the preparation of the in-situ supported nano-oxygen carrier particle materials by flame synthesis.

Description

Technical Field

[0001] The present invention belongs to the technical field related to the synthesis of oxygen carriers, and particularly relates to a device and method for in-situ deposition preparation of supported nano oxygen carriers by flame synthesis. Background Art

[0002] Chemical looping combustion (CLC), as a new combustion technology, has great application prospects in carbon dioxide capture. The main principle is as follows: in the fuel reactor, oxygen carrier particles provide the active lattice oxygen required for fuel combustion. Theoretically, the fuel is completely oxidized to CO2 and H2O, and pure CO2 can be obtained by condensation, realizing carbon capture at the source during combustion; the reduced oxygen carrier particles are sent into the air reactor, where they undergo an oxidation reaction with oxygen in the air to achieve regeneration and release a large amount of heat; the oxygen carrier particles circulate between the fuel reactor and the air reactor to transfer heat and active substances (active oxygen), which is equivalent to decomposing a one-step combustion reaction into two-step reactions carried out separately in the fuel reactor and the air reactor, thereby realizing the advantages of cascaded utilization of chemical energy, flameless low-NOx combustion, and CO2 capture at the source.

[0003] Currently, oxygen carrier materials are required to have characteristics such as high reaction activity, low cost, resistance to sintering, agglomeration, wear, and fragmentation, and environmental friendliness and non-toxicity. The particle size of oxygen carrier particles for chemical looping combustion is generally above 100 microns, and their reaction activity is limited due to the relatively low specific surface area; nano oxygen carrier particles have disadvantages such as easy sintering and agglomeration and high cost; loading nano oxygen carriers on carrier materials (the carrier materials can be micron-sized active metal oxides or micron-sized inert supports) is expected to improve the anti-sintering and agglomeration ability of oxygen carriers, have high reaction activity, and relatively low cost, which is a potential oxygen carrier design strategy. The preparation methods of supported nano oxygen carriers mainly include impregnation method, co-precipitation method, sol-gel method, solid-phase mixing method, etc., but the processes are complicated and it is difficult to prepare on a large scale.

[0004] Flame synthesis has the advantages of one-step synthesis of nanoparticles, easy industrial scale-up, and rich means of regulating the physical and chemical properties of nanoparticles. It is currently the main industrial-scale production method for nanoparticles. During the flame synthesis process, multi-component metal oxides can be mixed at the atomic scale. The active phases on the surface of nanomaterials have extremely high dispersion, and flame synthesis can easily prepare ultrafine nanoparticles with a size below 20 nm. Combining the flame synthesis method with the chemical vapor deposition method can directly and rapidly synthesize nanoparticles and deposition structures in one step, including nanofilms, nanocoatings, etc., without complex subsequent treatment measures (such as drying, aging, annealing, etc.), and has the characteristics of environmental protection, energy conservation, and high efficiency. The physical and chemical properties of supported nanoparticles can be adjusted by operating process parameters, such as the type of precursor, concentration, flow rate, type of solvent, type of dispersion gas, flow rate of dispersion gas, pressure drop of dispersion gas, etc. Therefore, the flame chemical vapor deposition technology that combines the advantages of the flame synthesis method and the chemical vapor deposition method has opened up a new way for the preparation of supported nano oxygen carriers (including other supported functional nanomaterials). However, the conventional flame chemical vapor deposition technology has a single type and morphology of the supported material, cannot be continuously prepared, has a low yield, and currently there is still no unified and widely applicable design theory and method for the key parameters such as the particle size, morphology, and deposition thickness of the supported nano oxygen carriers prepared by the flame chemical vapor deposition method. Summary of the Invention

[0005] In view of the above defects or improvement requirements of the prior art, the present invention provides a device and method for in-situ deposition preparation of supported nano oxygen carriers by flame synthesis. The system combines the flame synthesis nanoparticle technology and the chemical vapor deposition technology, can directly in-situ prepare a composite material loaded with the active components of the nano oxygen carrier, can achieve precise control of the particle size distribution, morphology size, and crystal phase purity of the supported nano oxygen carrier particles, can greatly expand the structure and components of the supported nano oxygen carrier particle material, significantly increase the yield of the supported nano oxygen carrier particle material, and can achieve industrial scale-up of the preparation of the supported nano oxygen carrier particle material by flame synthesis in-situ.

[0006] To achieve the above technical features, the object of the present invention is achieved as follows: A device for in-situ deposition preparation of supported nano oxygen carriers by flame synthesis, which includes a three-dimensional translation stage and a deposition device;

[0007] The three-dimensional translation stage includes a base, the bottom end of the base is fixed with a horizontal guide rail, and the top end of the base is fixed with a vertical guide rail;

[0008] The deposition device includes a support plate, a partition plate, a metal mesh, and a deposition plate;

[0009] The partition plate is fixed on the vertical guide rail through a locking nut;

[0010] A support plate is fixedly installed on the vertical guide rail above the partition baffle through a locking nut, and the deposition plate is fixed to the bottom end of the support plate;

[0011] The metal mesh is installed on the deposition plate by snap fasteners and fixing bolts;

[0012] Cooling water pipes are arranged on the deposition plate;

[0013] It also includes a burner.

[0014] The support plate is used to support and fix the deposition plate;

[0015] The partition baffle is used to shield the deposition plate and control the deposition amount of nanoparticles at different preparation stages;

[0016] The metal mesh is used to fix the carrier material;

[0017] The carrier material is attached to the deposition plate by coating or adhesion;

[0018] The deposition plate is used to collect nanomaterials;

[0019] The metal precursor undergoes pyrolysis in a high-temperature flame, nucleates and grows in the high-temperature flame, and then in-situ adheres to the carrier material on the deposition plate.

[0020] By adjusting the up-and-down position of the deposition device on the vertical guide rail, the relative position between the carrier material and the flame can be adjusted. The distance from the burner can be adjusted within the range of 5 mm - 650 mm, which can make the flame directly contact the carrier material or keep a certain distance from the carrier material.

[0021] The deposition plate has multiple different size models, and its size can be selected according to needs. The outer shape is rectangular, circular or square.

[0022] The deposition plate can rotate around the vertical guide rail. Multiple deposition plates can be fixed simultaneously through locking nuts. By rotation, in-situ deposition of nanoparticles on different deposition plates can be achieved to realize continuous preparation.

[0023] The carrier material includes but is not limited to oxygen carriers, catalysts and inert carriers, and the form of the carrier material is powder or block.

[0024] The moving frequency of the three-dimensional translation stage relative to the flame position is maintained at 0 times / min - 10 times / min, and the distance from the burner is controlled within 10 mm - 500 mm.

[0025] The adjustment range of the cooling water flow rate of the deposition plate is: 1 L / min - 10 L / min, so that the temperature is controlled between 50 - 90 °C;

[0026] A baffle is installed in the deposition device, which is placed below the deposition plate and closer to the flame to block the flame particles when continuously preparing and replacing the deposition plate.

[0027] By controlling the rotation of the locking nut on the vertical guide rail, the moving frequency and distance of the three-dimensional translation stage, it is possible to achieve the in-situ loading of specific nanoparticles layer by layer and continuously from the center of the circle for the carrier material in the disk-shaped in-situ deposition loading.

[0028] A method for in-situ deposition preparation of a supported nano-oxygen carrier by flame synthesis includes the following steps:

[0029] Step 1, prepare the carrier material;

[0030] Step 2, after processing the prepared carrier material, fix it on the deposition plate;

[0031] Step 3, prepare the metal precursor;

[0032] Step 4, atomize the prepared metal precursor, ignite the flame spray pyrolysis device for feeding the metal precursor, and control the feeding amount of the metal precursor, the flow rate of the oxygen disperser, and the sheath gas flow rate;

[0033] Step 5, control the distance between the three-dimensional translation stage and the burner, the flow rate of the cooling water of the deposition plate, and control the temperature of the deposition plate. At the same time, adjust the baffle to control the deposition area and time of the carrier material;

[0034] Step 6, the atomized metal precursor is further diffused by the oxygen dispersing gas and ignited by the premixed flame composed of methane and oxygen. After the metal precursor decomposes, it nucleates and grows in the high-temperature zone of the flame, and finally the particles are cooled and solidified through a rapid quenching process. Finally, with the help of an auxiliary vacuum pump, it is deposited on the deposition plate above the device; when the syringe pump has completely injected the metal precursor, at the same time, stop the supply of the premixed gas and the dispersing gas, and scrape off the powder on the deposition plate for characterization and chemical looping combustion performance testing.

[0035] Generally speaking, compared with the prior art by the above technical solutions conceived in the present invention, the in-situ deposition preparation device and method of a supported nano-oxygen carrier provided by the present invention mainly have the following beneficial effects:

[0036] 1. The in-situ deposition device of the present invention is installed on the three-dimensional translation stage. By adjusting the front, back, left, and right positions of the three-dimensional translation stage and the up and down position of the in-situ deposition device on the guide rail, the relative position between the carrier material and the flame can be flexibly adjusted. The distance between the carrier material and the burner can be adjusted within a large range, and it can even be placed inside the flame to control the size and morphology of the loaded nanoparticles.

[0037] 2. The carrier materials of the present invention include, but are not limited to, oxygen carriers, catalysts, inert carriers, etc. The forms of the carrier materials can be powders, porous ceramics, foam sintered bodies, etc., which can expand the applicable range of materials prepared by the flame synthesis method.

[0038] 3. The deposition plate of the present invention can rotate around the vertical guide rail. Therefore, multiple deposition plates can be fixed simultaneously, and different deposition plates can be collected by rotating the locking nut to achieve the goal of continuous preparation.

[0039] 4. A water cooling device is installed on the upper surface of the deposition plate of the present invention, that is, the part facing away from the flame. The temperature of the lower surface of the disc, that is, the part facing the flame, is controlled by adjusting the water flow rate. By controlling the distance between the in-situ deposition device and the bottom of the flame and the temperature of the lower surface of the disc, key parameters such as the particle size, morphology, and deposition thickness of the nanoparticles loaded on the carrier material can be controlled.

[0040] 5. The present invention can significantly increase the yield of the material loaded with nanoparticles and achieve the industrial scale-up of flame synthesis of loaded nanoparticles. This in-situ deposition device can realize the continuous preparation of supported nanoparticles. By controlling the rotation of the locking nut on the guide rail and the moving frequency and distance of the three-dimensional translation stage, the carrier material in the disc-shaped in-situ deposition loading can be continuously and layer-by-layer in-situ loaded with nanoparticles meeting specific requirements starting from the center of the circle.

[0041] 6. A baffle is installed in the in-situ deposition device of the present invention, which can adjust the deposition area and deposition time of the carrier material. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The present invention will be further described below in conjunction with the drawings and embodiments.

[0043] Figure 1 is the front view of the overall structure of the preparation device of the present invention.

[0044] Figure 2 is the top view of the overall structure of the preparation device of the present invention.

[0045] Figure 3 is the three-dimensional view of the preparation device of the present invention.

[0046] Figure 4 is the physical diagram of the in-situ loaded nanoparticle material prepared in Example 3.

[0047] Figure 5 is the SEM and EDX diagrams of the in-situ loaded nanoparticle material prepared in Example 3.

[0048] Figure 6 is the total surface spectrum diagram of the in-situ loaded nanoparticle material prepared in Example 3.

[0049] Figure 7Figures (a) and (b) are TEM images of the in-situ loaded nanoparticle material prepared in Example 3.

[0050] Figure 8 It is a comparison chart of carbon conversion rates in the chemical-looping combustion reaction performance of the in-situ loaded nanoparticle material prepared in Example 3.

[0051] Figure 9 It is a comparison chart of NO gas production rates in the chemical-looping combustion reaction performance of the in-situ loaded nanoparticle material prepared in Example 3.

[0052] Figure 10 It is a comparison chart of NO gas component concentrations in the chemical-looping combustion reaction performance of the in-situ loaded nanoparticle material prepared in Example 3.

[0053] In the figure: 1 - base, 2 - vertical guide rail, 3 - locking nut, 4 - support plate, 5 - partition plate, 6 - metal mesh, 7 - deposition plate, 8 - cooling water pipe, 9 - buckle, 10 - burner, 11 - horizontal guide rail, 12 - fixing bolt. Detailed implementation manners

[0054] The embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0055] Example 1:

[0056] Refer to Figures 1-3 , a flame synthesis in-situ deposition preparation device for a supported nano oxygen carrier, which includes a three-dimensional translation stage and a deposition device; the three-dimensional translation stage includes a base 1, a horizontal guide rail 11 is fixed at the bottom end of the base 1, and a vertical guide rail 2 is fixed at the top end of the base 1; the deposition device includes a support plate 4, a partition plate 5, a metal mesh 6 and a deposition plate 7; the partition plate 5 is fixed on the vertical guide rail 2 through a locking nut 3; a support plate 4 is fixedly installed on the vertical guide rail 2 above the partition plate 5 through a locking nut, and the deposition plate 7 is fixed at the bottom end of the support plate 4; the metal mesh 6 is installed on the deposition plate 7 by a buckle 9 and a fixing bolt 12; a cooling water pipe 8 is arranged on the deposition plate 7; it also includes a burner 10. By using the above preparation device, the preparation of supported nano materials can be realized. The system combines the flame synthesis of nanoparticles technology with the gas phase deposition technology, and can directly in-situ prepare a composite material loaded with the active components of the nano oxygen carrier, and can realize the precise control of the particle size distribution, morphology size and crystal phase purity of the supported nano oxygen carrier particles, and can greatly expand the structure and components of the supported nano oxygen carrier particle material, significantly increase the yield of the supported nano oxygen carrier particle material, and can achieve the industrial scale-up of the preparation of the flame synthesis in-situ loaded nano oxygen carrier particle material.

[0057] Further, the support plate 4 is used to support and fix the deposition plate 7; the partition plate 5 is used to block the deposition plate 7 and control the deposition amount of nanoparticles at different preparation stages; the metal mesh 6 is used to fix the carrier material; the carrier material is coated or adhered to the deposition plate 7; the deposition plate 7 is used to collect nanomaterials; the metal precursor undergoes pyrolysis in a high-temperature flame, nucleates and grows in the high-temperature flame, and then is in-situ attached to the carrier material on the deposition plate.

[0058] Further, by adjusting the vertical position of the deposition device on the vertical guide rail 2, the relative position between the carrier material and the flame can be adjusted, and the distance from the burner 10 can be adjusted within the range of 5 mm - 650 mm, enabling the flame to be in direct contact with the carrier material or maintaining a certain distance from the carrier material. By adjusting the combustion distance as described above, supported nano-oxygen carrier particles with different particle requirements can be prepared according to requirements.

[0059] Further, the deposition plate 7 has multiple different size models, and its size can be selected according to needs, with the outer shape being rectangular, circular or square. By adopting different size models, its adaptability and flexibility are enhanced.

[0060] Further, the deposition plate 7 can rotate around the vertical guide rail 2. Multiple deposition plates 7 can be fixed simultaneously through the lock nut 3. By rotating, different deposition plates 7 can perform in-situ deposition of nanoparticles, realizing continuous preparation.

[0061] Further, the carrier material includes, but is not limited to, oxygen carriers, catalysts, and inert carriers, and the form of the carrier material is powder or block. By using different types of carrier materials, its adaptability is enhanced. Furthermore, it is ensured that selection can be made according to needs.

[0062] Further, the moving frequency of the three-dimensional translation stage relative to the flame position is maintained at 0 times / min - 10 times / min, and the distance from the burner is controlled within 10 mm - 500 mm. Through the above control of the moving frequency and distance, nano-oxygen carrier particles with different requirements can be prepared according to needs during the preparation process.

[0063] Further, the adjustment range of the cooling water flow rate of the deposition plate is: 1 L / min - 10 L / min, so that the temperature is controlled between 50 - 90 °C; a partition plate 5 is installed in the deposition device, which is placed below the deposition plate closer to the flame to block flame particles when continuously preparing and replacing the deposition plate 7.

[0064] Further, by controlling the rotation of the lock nut 3 on the vertical guide rail, the moving frequency and distance of the three-dimensional translation stage, in-situ loading of nanoparticles with specific requirements layer by layer and continuously starting from the center of the circle can be achieved for the carrier material in the disk-shaped in-situ deposition loading.

[0065] Example 2:

[0066] A method for preparing a supported nano-oxygen carrier by in-situ deposition through flame synthesis, comprising the following steps:

[0067] Step 1, preparing a carrier material;

[0068] Step 2, after processing the prepared carrier material, fixing it on the deposition plate 7;

[0069] Step 3, preparing a metal precursor;

[0070] Step 4, atomizing the prepared metal precursor, igniting the flame spray pyrolysis device for feeding the metal precursor, and controlling the feeding amount of the metal precursor, the flow rate of the oxygen disperser, and the flow rate of the sheath gas;

[0071] Step 5, controlling the distance between the three-dimensional translation stage and the burner, the flow rate of the cooling water of the deposition plate, and controlling the temperature of the deposition plate, and at the same time adjusting the baffle plate 5 to control the deposition area and time of the carrier material;

[0072] Step 6, the atomized metal precursor is further diffused by the oxygen dispersion gas and ignited by the premixed flame composed of methane and oxygen. After the metal precursor decomposes, it nucleates and grows in the high-temperature zone of the flame, and finally the particles are cooled and solidified through a rapid quenching process. Finally, with the help of an auxiliary vacuum pump, it is deposited on the deposition plate above the device; after the syringe pump has completely injected the metal precursor, at the same time stop the supply of the premixed gas and the dispersion gas, and scrape off the powder on the deposition plate for characterization and chemical looping combustion performance testing.

[0073] Example 3:

[0074] See Figures 4-10 , and adopt a device for preparing a supported nano-oxygen carrier by in-situ deposition through flame synthesis, and then load the supported Sr 0.9 Na 0.1 Ti 0.5 Co 0.5 O3 nano-oxygen carrier particles:

[0075] Step 1, preparing a carrier material:

[0076] 1. Select fine iron ore particles bonded with cement as raw materials, and the preparation method of the carrier material is as follows: Mix iron ore and cement in a ratio of 4:1, and use a wheel mill to stir well, with an appropriate amount of water supplemented during the stirring process; after the above operations are completed, transport the wet material into the mold through a conveyor belt and a pneumatic device, and then automatically press and discharge the wet material through a control system using a hydraulic press, and perform natural drying at room temperature for 36 h to obtain the shaped carrier material.

[0077] Step 2, fixing the prepared carrier material on the deposition plate 7:

[0078] 2. After grinding the form carrier material, it is adhered to the deposition plate 7. Figure 3 This is a physical diagram of the preparation device for the in-situ flame synthesis and loading of nanoparticle materials of the present invention. For this experiment, only one deposition plate 7 is assembled.

[0079] Step three, prepare the metal precursor:

[0080] 3. Add 1.56 g of strontium acetate, 0.08 g of sodium ethoxide, and 3.16 g of cobalt 2-ethylhexanoate to 50 mL of acetic acid solution, stir vigorously for 5 minutes, and perform ultrasonic treatment for 10 minutes. Then continue stirring until the strontium acetate solid is completely dissolved in the acetic acid solution to form a clear and transparent solution.

[0081] 4. Add molecular sieve to the acetic acid solution to remove the moisture in the solution. After standing for 10 minutes, filter out the molecular sieve.

[0082] 5. Dissolve 1.30 g of tetrabutyl titanate in 50 mL of ethanol and stir vigorously.

[0083] 6. Mix the acetic acid solution and the ethanol solution to obtain the metal precursor solution, and stir vigorously until the metal precursor solution presents a homogeneous and clear state, and the total metal ion concentration of the solution is 0.15 mol / L.

[0084] Step four, atomize the prepared metal precursor, ignite the flame spray pyrolysis device for feeding the metal precursor, and control the feeding amount of the metal precursor, the flow rate of the oxygen disperser, and the sheath gas flow rate:

[0085] 7. Ignite the flame spray pyrolysis device for feeding the liquid metal precursor, spray and atomize the prepared metal precursor solution through an injection pump, and keep the feeding flow rate of the metal precursor at 3 mL / min, the flow rate of the oxygen dispersion gas at 5 L / min, and the sheath gas as argon with a flow rate of 8 L / min.

[0086] Step five, control the distance between the three-dimensional translation stage and the burner, the cooling water flow rate of the deposition plate, and control the temperature of the deposition plate. At the same time, adjust the baffle 5 to control the deposition area and time of the carrier material:

[0087] 8. Control the distance between the three-dimensional translation stage and the burner at 100 mm, adjust the cooling water flow rate of the deposition plate to 5 L / min, control the temperature at 70 °C, and adjust the baffle to make the deposition area of the carrier material 10 cm2 and the time 20 min.

[0088] Step 6: The atomized metal precursor droplets are further dispersed by the oxygen dispersion gas and ignited by a premixed flame composed of 0.75 L / min of methane and 1.5 L / min of oxygen. After the metal precursor decomposes, nucleation and growth occur in the high-temperature zone of the flame. Finally, the particles are cooled and coagulated through a rapid quenching process, and ultimately deposited on the deposition plate above the device with the help of an auxiliary vacuum pump. After the syringe pump has completely injected the metal precursor, the supply of the premixed gas and the dispersion gas is stopped simultaneously, and the powder on the deposition plate is scraped off for characterization and chemical looping combustion performance testing. What is obtained in this example is Sr 0.9 Na 0.1 Ti 0.5 Co 0.5 O3 nano oxygen carrier material.

[0089] Furthermore, chemical looping combustion performance tests were carried out on the cement-bonded iron ore and the prepared supported nano oxygen carriers. The results show that the reaction rate of the supported nano oxygen carriers is significantly improved. It should be noted that through the analysis of the pollutants in the tail gas, it is found that compared with the cement-bonded iron ore, the NO yield and the real-time combustible gas concentration of the supported nano oxygen carriers are both reduced to a certain extent, which is attributed to the presence of the sample Sr 0.9 Na 0.1 Ti 0.5 Co 0.5 O3.

[0090] The nano-supported oxygen carrier prepared in Example 3 above was subjected to a chemical looping combustion experiment, and the specific implementation process can be seen in Example 4.

[0091] Example 4:

[0092] Supported Sr 0.9 Na 0.1 Ti 0.5 Co 0.5 O3 nano oxygen carrier particle chemical looping combustion experiment test.

[0093] This experiment is based on a fixed-bed reactor and aims to investigate the reaction performance of the supported nano oxygen carrier prepared in Example 3 of the present invention with plastics, and compare it with the cement-bonded iron ore without the supported nano oxygen carrier. The reactor is made of quartz tube and is divided into two reactors: pyrolysis and chemical looping combustion. The gas generated by the pyrolysis reactor is introduced into the chemical looping combustion reactor for combustion, and electric heating and thermocouple temperature control are used.

[0094] The experimental process is as follows: Place 30 g of the oxygen carrier sample in the chemical-looping combustion reactor. Under an air atmosphere, heat the pyrolysis reactor and the chemical-looping combustion reactor to 500 °C and 950 °C respectively, and then purge with N2 at a gas flow rate of 1 L / min. When the oxygen concentration in the reactor is 0 vol.%, add the plastic sample to the pyrolysis reactor, and monitor the gas concentration in real time with a flue gas analyzer.

[0095] Figures 8-10 This is a comparison of the performance of the oxygen carrier with and without loaded nanoparticles. The results show that, compared with the cement-bonded iron ore, the reaction rate of the loaded nano-oxygen carrier is significantly improved. It should be noted that through the analysis of the pollutants in the tail gas, it is found that the NO yield of the loaded nano-oxygen carrier decreases. The NO yield of the loaded nano-oxygen carrier is 31.465%, which is lower than 36.962% of the cement-bonded iron ore. This can be verified from the real-time NO concentration curve, which indicates that the presence of nanoparticles Sr 0.9 Na 0.1 Ti 0.5 Co 0.5 O3 forms a synergistic effect with the oxygen carrier, which helps to reduce the generation of NO.

Claims

1. A device for in-situ deposition preparation of a supported nano-oxygen carrier by flame spray pyrolysis synthesis, characterized in that, It includes a three-dimensional translation stage and a deposition device; The three-dimensional translation stage includes a base (1), a horizontal guide rail (11) is fixed at the bottom end of the base (1), and a vertical guide rail (2) is fixed at the top end of the base (1); The deposition device includes a support plate (4), a baffle plate (5), a metal mesh (6) and a deposition plate (7); The baffle plate (5) is fixed on the vertical guide rail (2) through a locking nut (3); A support plate (4) is fixedly installed on the vertical guide rail (2) above the baffle plate (5) through a locking nut, and the deposition plate (7) is fixed at the bottom end of the support plate (4); The metal mesh (6) is installed on the deposition plate (7) by a buckle (9) and a fixing bolt (12); A cooling water pipe (8) is arranged on the deposition plate (7); It also includes a burner (10); The support plate (4) is used to support and fix the deposition plate (7); The baffle plate (5) is used to shield the deposition plate (7) and control the deposition amount of nanoparticles at different preparation stages; The metal mesh (6) is used to fix the carrier material; The carrier material is coated or adhered to the deposition plate (7); The deposition plate (7) is used to collect nano materials; The metal precursor undergoes pyrolysis in a high-temperature flame, nucleates and grows in the high-temperature flame, and then in-situ adheres to the carrier material on the deposition plate; The deposition plate (7) can rotate around the vertical guide rail (2), and multiple deposition plates (7) can be fixed simultaneously through the locking nut (3). By rotation, different deposition plates (7) can perform in-situ deposition of nanoparticles to achieve continuous preparation; The adjustment range of the cooling water flow rate of the deposition plate is: 1 L / min - 10 L / min, and the temperature is controlled between 50 - 90 °C; A baffle plate (5) is installed in the deposition device, which is placed closer to the flame below the deposition plate. When continuously preparing and replacing the deposition plate (7), it blocks the flame particles; By controlling the rotation of the locking nut (3) on the vertical guide rail, the movement frequency and distance of the three-dimensional translation stage, it is possible to achieve that the carrier material on the disk-shaped in-situ deposition loading is in-situ loaded with nanoparticles required layer by layer and continuously starting from the center of the circle.

2. The in-situ deposition preparation device for synthesizing a supported nano-oxygen carrier by flame spray pyrolysis according to claim 1, wherein, By adjusting the relative position of the carrier material and the flame by adjusting the up and down position of the deposition device on the vertical guide rail (2), and adjusting the distance from the burner (10) within the range of 5 mm - 650 mm, it is possible to make the flame directly contact the carrier material or keep a certain distance between the flame and the carrier material.

3. The preparation device for in-situ deposition of a supported nano-oxygen carrier by flame spray pyrolysis synthesis according to claim 1, characterized in that, The deposition plate (7) has multiple different size models, and its size can be selected according to needs. The shape is rectangular, circular or square.

4. The preparation device for in-situ deposition of the supported nano-oxygen carrier by flame spray pyrolysis synthesis according to claim 1, characterized in that, The carrier material includes but is not limited to oxygen carriers, catalysts and inert carriers, and the form of the carrier material is powder or block.

5. The preparation device for in-situ deposition of a supported nano-oxygen carrier by flame spray pyrolysis synthesis according to claim 1, characterized in that, The movement frequency of the three-dimensional translation stage relative to the flame position is maintained at 0 times / min - 10 times / min, and the distance from the burner is controlled within 10 mm - 500 mm.

6. A method for in-situ deposition preparation of a supported nano-oxygen carrier by flame spray pyrolysis synthesis, characterized in that, It is realized by using the flame spray pyrolysis synthesis in-situ deposition preparation device for a supported nano oxygen carrier described in any one of claims 1 - 5, and includes the following steps: Step 1, prepare the carrier material; Step 2: After processing the prepared carrier material, fix it on the deposition plate (7). Step 3: Prepare the metal precursor. Step 4: Atomize the prepared metal precursor, ignite the flame spray pyrolysis device for feeding the metal precursor, and control the feeding rate of the metal precursor, the flow rate of the oxygen disperser, and the flow rate of the sheath gas. Step 5: Control the distance between the three-dimensional translation stage and the burner, the flow rate of the cooling water of the deposition plate, and control the temperature of the deposition plate. At the same time, adjust the baffle plate (5) to control the deposition area and time of the carrier material. Step 6: The atomized metal precursor is further diffused by the oxygen dispersing gas and ignited by the premixed flame composed of methane and oxygen. After the metal precursor decomposes, nucleation and growth occur in the high-temperature zone of the flame. Finally, the particles are cooled and solidified through a rapid quenching process, and are ultimately deposited on the deposition plate above the device with the help of an auxiliary vacuum pump. After the injection pump has completely injected the metal precursor, stop the supply of the premixed gas and the dispersing gas at the same time, and scrape off the powder on the deposition plate for characterization and chemical looping combustion performance testing.

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