A microwave-heated multistage channel biomimetic reactor for liquid storage hydrogen system

Abstract

The present application relates to the technical field of hydrogen storage reactor, and discloses a microwave heating multistage channel biomimetic reactor for a liquid hydrogen storage system, which comprises a reaction structure, a microwave source group and a shell structure, wherein the reaction structure comprises a reaction tube and a multistage channel biomimetic module arranged in the cavity of the reaction tube; the microwave source group has several groups, is equidistantly distributed on the outer side of the axial direction of the reaction tube and is in the same plane with the multistage channel biomimetic module, and comprises a microwave generator and a rectangular waveguide; the present application applies microwave heating technology and biomimetic multistage channel technology to the reactor of the liquid hydrogen storage system, creates a scheme of coupling microwave heating and multistage channel biomimetic reactor, and not only has high reaction efficiency and high energy utilization rate, but also realizes the modularization and miniaturization of the reactor, and supplies high-purity hydrogen gas at a lower cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydrogen storage reactor, and particularly relates to a microwave heating multistage channel biomimetic reactor for a liquid hydrogen storage system. BACKGROUND

[0002] Since the dehydrogenation reaction of the hydrogen-rich carrier is a strong endothermic process, the energy consumption is high, and the reaction selectivity directly affects the complexity of the subsequent hydrogen purification process, therefore, the design of the reactor is particularly crucial for optimizing the reaction process and improving the energy efficiency. The conventional process usually adopts a fixed bed reactor with outward conduction heating, which has problems such as low heating efficiency, uneven temperature distribution in the bed, and easy occurrence of cold zones in the central region. In addition, the conventional fixed bed reactor has a significant pressure drop under high flow rate feeding conditions, and the problem of catalyst internal diffusion limitation is prominent.

[0003] The microwave heating technology selectively acts on the catalyst bed with a high loss tangent, effectively eliminates the cold zone in the center of the bed, and realizes high energy efficiency. However, due to the difficulty in matching the electromagnetic field distribution with the catalyst bed form in the fixed bed reactor with high aspect ratio, the microwave heating easily has the problem of insufficient uniformity in the axial range.

[0004] Based on the wide application prospect of the liquid hydrogen storage technology, the existing technology still has many defects in the design of the reactor, which is a technical problem that needs to be solved by the personnel in the field. SUMMARY

[0005] This section aims to summarize some aspects of the embodiments of the present application and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of the specification to avoid obscuring the purpose of this section, abstract and title, and such simplifications or omissions cannot be used to limit the scope of the present application.

[0006] In view of the above problems of the existing microwave heating multistage channel biomimetic reactor for a liquid hydrogen storage system, the present application is proposed.

[0007] Therefore, the purpose of the present application is to provide a microwave heating multistage channel biomimetic reactor for a liquid hydrogen storage system, which aims to solve the problems of the conventional fixed bed reactor, such as low heating efficiency, uneven temperature distribution in the bed, and easy occurrence of cold zones in the central region, as well as the problem of insufficient uniformity of microwave heating in the axial range, which leads to the problems of low hydrogen storage reaction efficiency and low energy utilization rate of the existing hydrogen storage reactor.

[0008] To solve the above technical problems, the present application provides the following technical solutions: a microwave heating multistage channel biomimetic reactor for a liquid hydrogen storage system, the reactor comprising a reaction structure, a microwave source group and a shell structure, wherein the reaction structure comprises a reaction tube and a multistage channel biomimetic module arranged in the cavity of the reaction tube; the microwave source group has several groups, is distributed equidistantly on the axial outside of the reaction tube and is in the same plane with the multistage channel biomimetic module, and comprises a microwave generator and a rectangular waveguide.

[0009] As a preferred scheme of the microwave heating multistage channel biomimetic reactor for a liquid hydrogen storage system, wherein: the multistage channel biomimetic module is located at the middle position of the reaction tube, divides the reaction tube into two parts, forms a feeding channel above the multistage channel biomimetic module and forms a discharging channel below the multistage channel biomimetic module.

[0010] As a preferred scheme of the microwave heating multistage channel biomimetic reactor for a liquid hydrogen storage system, wherein: the multistage channel biomimetic module comprises a reaction structure body located at the middle, a permeation wall surface arranged on the outer wall of the reaction structure body and a sealing layer surface arranged on the top and bottom of the reaction structure body and the permeation wall surface.

[0011] As a preferred scheme of the microwave heating multistage channel biomimetic reactor for a liquid hydrogen storage system, wherein: the reaction structure body has a layered structure as a whole, comprises a catalyst bed layer, a side feeding channel and a side discharging channel, the side feeding channel and the side discharging channel are alternately distributed on the two sides of the catalyst bed layer; the inlet of the side feeding channel extends to the surface of the sealing layer surface on the top; the outlet of the side discharging channel extends to the surface of the sealing layer surface on the bottom.

[0012] As a preferred scheme of the microwave heating multistage channel biomimetic reactor for a liquid hydrogen storage system, wherein: the catalyst bed layer is filled with a mixture of wave-absorbing medium, catalyst and dilution material.

[0013] As a preferred scheme of the microwave heating multistage channel biomimetic reactor for a liquid hydrogen storage system, wherein: the permeation wall surface adopts porous honeycomb ceramic, porous honeycomb cordierite or porous honeycomb silicon carbide.

[0014] As a preferred scheme of the microwave heating multistage channel biomimetic reactor for a liquid hydrogen storage system, wherein: the shell structure comprises an outer shell, an upper sealing cover arranged on the top of the outer shell and a lower sealing cover arranged on the bottom of the outer shell.

[0015] As a preferred scheme of the microwave heating multistage channel biomimetic reactor for liquid storage hydrogen system, wherein: the reaction structure is arranged in the middle of the inner cavity of the outer shell, and the microwave source group is uniformly arranged outside the outer shell.

[0016] As a preferred scheme of the microwave heating multistage channel biomimetic reactor for liquid storage hydrogen system, wherein: the inner cavity of the outer shell is filled with heat preservation material, and the heat preservation material wraps the outer wall of the tube body of the reaction tube.

[0017] As a preferred scheme of the microwave heating multistage channel biomimetic reactor for liquid storage hydrogen system, wherein: further comprising a pipeline unit including an air inlet pipe and an air outlet pipe, one end of the air inlet pipe penetrates through the upper end side wall of the outer shell and communicates with the feed channel, and one end of the air outlet pipe penetrates through the lower end side wall of the outer shell and communicates with the discharge channel.

[0018] The beneficial effects of the present application are:

[0019] 1. The multistage channel biomimetic module in the present application adopts an inner radial flow design, which can significantly reduce the bed pressure drop, thereby effectively eliminating the internal diffusion limitation by using small size catalyst particles, strengthening the reaction mass transfer, and improving the reaction efficiency.

[0020] 2. The microwave heating selectively heats the multistage channel biomimetic module, eliminates the reaction cold zone, and improves the energy utilization rate.

[0021] 3. The design size of the multistage channel biomimetic module in the present application is close to the waveguide size, which realizes the matching of electromagnetic field distribution and catalyst bed distribution, and improves the bed temperature distribution.

[0022] 4. The reactor of the present application can significantly reduce the flow resistance while strengthening the heat transfer and mass transfer process, has the characteristics of miniaturization and modularization, thereby realizing the mobility application, and providing a feasible scheme for the on-site hydrogen energy application scenario.

[0023] The microwave heating multistage channel biomimetic reactor designed in the present application has the advantages of low pressure drop, uniform temperature, high energy utilization rate, etc., and is suitable for the dehydrogenation reaction with strong heat absorption and high energy consumption in the liquid storage hydrogen system. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor. Among them:

[0025] Figure 1 is a schematic diagram of a plant leaf vein system.

[0026] Figure 2 is a schematic diagram of the reaction structure and microwave source group distribution structure of the microwave heating multistage channel biomimetic reactor for the liquid storage and hydrogen system of the present application.

[0027] Figure 3 is a schematic diagram of the internal structure of the reaction structure of the microwave heating multistage channel biomimetic reactor for the liquid storage and hydrogen system of the present application.

[0028] Figure 4 is a schematic diagram of the internal structure of the multistage channel biomimetic module of the microwave heating multistage channel biomimetic reactor for the liquid storage and hydrogen system of the present application.

[0029] Figure 5 is a schematic diagram of the internal planar structure of the multistage channel biomimetic module of the microwave heating multistage channel biomimetic reactor for the liquid storage and hydrogen system of the present application.

[0030] Figure 6 is a schematic diagram of the overall structure of the multistage channel biomimetic module of the microwave heating multistage channel biomimetic reactor for the liquid storage and hydrogen system of the present application.

[0031] Figure 7 is a schematic diagram of the overall external structure of the microwave heating multistage channel biomimetic reactor for the liquid storage and hydrogen system of the present application.

[0032] Figure 8 is a schematic diagram of the overall internal cross-sectional structure of the microwave heating multistage channel biomimetic reactor for the liquid storage and hydrogen system of the present application. DETAILED DESCRIPTION

[0033] In order to make the above objectives, features and advantages of the present application more apparent, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0034] In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present application, however, the present application can be practiced in other manners different from those described herein, and those skilled in the art can make similar generalizations without departing from the spirit and scope of the present application, therefore, the present application is not limited to the specific embodiments disclosed below.

[0035] Secondly, the "one embodiment" or "embodiment" referred to herein means that the specific features, structures or characteristics can be included in at least one implementation of the present application. The "in one embodiment" appearing in different places in the specification does not mean the same embodiment, nor is it an embodiment that is independent of or selected from other embodiments.

[0036] Thirdly, the present application is described in detail in combination with the schematic diagram. In the detailed description of the embodiments of the present application, the cross-sectional view of the device structure is locally enlarged without the general proportion for the convenience of illustration, and the schematic diagram is only an example which should not limit the scope of protection of the present application. In addition, the three-dimensional spatial dimensions including length, width and depth should be included in the actual manufacture.

[0037] Referring to Figures 1 to 8 For an embodiment of the present application, a microwave heating multi-stage channel biomimetic reactor for a liquid storage hydrogen system is provided, which comprises a reaction structure 100, a microwave source group 200 and a shell structure 300, wherein the reaction structure 100 is the main area of the reaction, which is used to generate the hydrogen storage reaction inside; the microwave source group 200 is used for microwave heating to provide heat for the reaction; and the shell structure 300 is used to accommodate the reaction structure 100 and the microwave source group 200, which is beneficial to the progress of the reaction.

[0038] Specifically, the reaction structure 100 comprises a reaction tube 101 and a multi-stage channel biomimetic module 102 arranged in the cavity of the reaction tube 101; further, the reaction tube 101 is made of quartz material, the inner part of the tube body is hollow, and both ends are open; the multi-stage channel biomimetic module 102 is located at the middle position of the reaction tube 101, preferably the axial middle position; and the overall outer diameter of the multi-stage channel biomimetic module 102 is the same as the inner cavity diameter of the reaction tube 101, that is, the multi-stage channel biomimetic module 102 divides the inner cavity of the reaction tube 101 into two parts, forming upper and lower cavity channels, specifically, the upper tube body of the multi-stage channel biomimetic module 102 forms a feeding channel 101a, and the lower tube body of the multi-stage channel biomimetic module 102 forms a discharging channel 101b.

[0039] Further, the multi-stage channel biomimetic module 102 comprises a reaction structure body 102a located at the middle, a permeation wall surface 102b arranged on the outer side wall of the reaction structure body 102a, and a sealing layer surface 102c arranged on the top and bottom of the reaction structure body 102a and the permeation wall surface 102b.

[0040] It should be noted that the multi-stage channel biomimetic module 102 is designed by using the biomimetic concept, which is inspired by biological structures, such as Figure 1 As shown in FIG. 1, the multi-stage channel module is designed by imitating the plant vein network system with multi-stage channel xylem transport system and phloem recovery system. Such a plant vein network system can be regarded as a generalized concept of a reactor: the xylem vessel corresponds to the feeding system of the reactor (transporting water and nutrients), the phloem sieve tube constitutes the discharging system (transporting photosynthetic products), and the mesophyll cell constitutes the place where material transfer and core chemical reaction (photosynthesis) occur.

[0041] Specifically, the permeable wall surface 102b in the multi-stage channel biomimetic module 102 is enclosed to form a cylindrical accommodation, and the accommodation space is arranged in the middle, and the upper and lower end surfaces are blocked by the sealing layer surface 102c, so that the reaction structure 102a is limited to the middle position. As shown in Figure 4 It should be noted that the permeable wall surface 102b is made of a porous honeycomb material that can be permeable, and has through channels on the upper and lower surfaces; the hydrogen storage reaction gas medium can pass through the hole channel. Further, the permeable porous honeycomb material can use a porous honeycomb ceramic, a porous honeycomb cordierite or a porous honeycomb silicon carbide material. As a preferred porous honeycomb material, the porous honeycomb material is a porous honeycomb cordierite. The sealing layer surface 102c uses a high-temperature resistant inorganic adhesive material.

[0042] Further, the reaction structure 102a has a layered structure as a whole, which can be a side-by-side type layer structure or a ring layer type layer structure. In this scheme, a side-by-side type layer structure is taken as an example for illustration. As shown in Figure 4 and Figure 5 The reaction structure 102a includes a catalyst bed layer 102a1, a side feed channel 101a2 and a side discharge channel 102a3, and the side feed channel 101a2 and the side discharge channel 102a3 are alternately distributed on both sides of the catalyst bed layer 102a1.

[0043] It should be noted that in combination with Figure 5 and Figure 6 The channel inlet of the side feed channel 101a2 extends to the surface of the sealing layer surface 102c on the top, facilitating the entry of the material from the inlet of the side feed channel 101a2; and the channel outlet of the side discharge channel 102a3 extends to the surface of the sealing layer surface 102c on the bottom, facilitating the discharge of the reacted material from the outlet of the side discharge channel 102a3.

[0044] Among them, the layer structure of the reaction structure 102a has multiple layers, each side feed channel 101a2 and side discharge channel 102a3 occupies a column of channels, and the catalyst bed layer 102a1 occupies one or more columns of channels, and the hydrogen storage reaction gas medium can flow axially in the side feed channel 101a2 and the side discharge channel 102a3, and flow radially in the catalyst bed layer 102a1.

[0045] It should be noted that the catalyst bed layer 102a1 is filled with a mixture of wave-absorbing medium, catalyst and dilution material. Among them, the wave-absorbing medium needs to have a strong wave-absorbing medium material with high loss tangent, and the optional strong wave-absorbing medium includes silicon carbide, activated carbon, ceramic, etc. As a preferred strong wave-absorbing medium, the strong wave-absorbing medium is silicon carbide, and as a preferred dilution material, the dilution material is quartz sand.

[0046] Further, the mixing ratio of the catalyst and the strong wave-absorbing medium can be adjusted according to the electromagnetic field distribution. The catalyst bed 102a1 located close to the wall of the reaction tube 101 can adopt a higher mixing ratio of the catalyst and the strong wave-absorbing medium, and as a preferred, the mixing ratio of the catalyst and the strong wave-absorbing medium is 1:3. The catalyst bed 102a1 located close to the center can adopt a lower mixing ratio of the catalyst and the strong wave-absorbing medium, and be diluted with the microwave-transparent material, and as a preferred, the mixing ratio of the catalyst, the microwave-transparent material and the strong wave-absorbing medium is 1:1:2.

[0047] For the microwave source group 200, a plurality of groups are arranged, equidistantly distributed on the axial outside of the reaction tube 101, and in the same plane as the multi-stage channel biomimetic module 102, which includes a microwave generator 201 and a rectangular waveguide 202.

[0048] It should be noted that the plurality of microwave source groups 200 are circumferentially distributed, and the output ends are all directed to the multi-stage channel biomimetic module 102 in the reaction tube 101. The advantage of the microwave source group 200 and the multi-stage channel biomimetic module 102 being distributed in the same plane is that the electromagnetic field distribution is adapted to the catalyst bed distribution, and the bed absorption power and the bed temperature uniformity are improved.

[0049] Further, each part of the reactor is installed through the shell structure 300, which includes an outer shell 301, an upper sealing cover 302 arranged on the top of the outer shell 301, and a lower sealing cover 303 arranged on the bottom of the outer shell 301.

[0050] The outer shell 301 is a regular hollow cylindrical structure, and the upper and lower ends have openings, which are blocked by the upper sealing cover 302 and the lower sealing cover 303. It should be noted that the regular shape can be understood as a regular polygon structure or a circular shape.

[0051] Further, the reaction structure 100 is arranged in the middle of the inner cavity of the outer shell 301, and the two ends of the reaction tube 101 are communicated with the upper and lower openings of the outer shell 301. The heat preservation material 301a filled in the inner cavity of the outer shell 301 completely wraps the outer wall of the tube body of the reaction tube 101, and is used for heat preservation in the shell to reduce heat dissipation and improve energy utilization.

[0052] The microwave source groups 200 are uniformly arranged outside the outer shell 301. For a regular pentagonal outer shell 301, the microwave source groups 200 are distributed on the middle side walls of the five faces.

[0053] Further, the pipeline unit 400 is needed to transport the reacted gas, so the pipeline unit 400 at least includes a gas inlet pipe 401 and a gas outlet pipe 402, one end of the gas inlet pipe 401 penetrates the upper end side wall of the outer shell 301 and communicates with the feeding channel 101a for inputting gas; one end of the gas outlet pipe 402 penetrates the lower end side wall of the outer shell 301 and communicates with the discharging channel 101b for outputting gas.

[0054] Further, for the convenience of grasping the temperature inside the reactor, a temperature detection port is arranged at the top of the reactor, and a thermocouple R can be used to detect the reaction temperature, so as to facilitate the control of the reaction process, which will not be described in detail here.

[0055] Based on the multi-stage channel biomimetic reactor, when in operation, the microwave generator 201 in the microwave source group 200 generates microwaves with a certain power, which is guided into the inside of the outer shell 301 by the waveguide 202 and is absorbed by the catalyst bed 102a1 in the multi-stage channel biomimetic module 102, so as to realize the selective heating of the catalyst bed 102a1 by microwaves. The gas stream for hydrogen storage reaction enters the reaction tube 101 from the gas inlet pipe 401, and enters the multi-stage channel biomimetic module 102 from the feeding channel 101a. The gas material first enters the side feeding channel 101a2 of the multi-stage channel biomimetic module 102, then penetrates through the permeable wall surface 102b, flows radially through the catalyst bed 102a1, and thus reacts; the reacted gas product penetrates through the permeable wall surface 102b again, enters the side discharging channel 102a3 for collection, and flows out of the multi-stage channel biomimetic module 102. Subsequently, the product gas enters the discharging channel 101b and finally leaves the reactor through the gas outlet pipe 402.

[0056] The gas material used for the reaction is one or more of toluene, benzene, benzyl toluene, perhydro-N-ethylcarbazole, methyl piperidine and other hydrogen storage carriers. Preferably, the pressure of the reactor is micro-positive pressure.

[0057] Embodiment

[0058] Reference Figures 2~7 For an embodiment of the present application, a microwave heating multi-stage channel biomimetic reactor for a liquid hydrogen storage system is used to produce hydrogen gas by reaction.

[0059] In this embodiment, the reactor outer shell 301 is a regular pentagonal structure. That is, it has five identical side surfaces, and two microwave source groups 200 are arranged in parallel in the middle of each side surface, a total of 10 microwave source groups, and the microwave frequency generated by the microwave generator 201 is 2.45 GHz. The waveguide 202 is preferably a BJ26 type waveguide with a size of 86.36x43.18x100 mm.

[0060] Further, the liquid hydrogen storage carrier used in this embodiment is methylcyclohexane. The material of the permeable wall 102b of the multi-stage channel biomimetic module 102 is commercially available porous honeycomb cordierite, with a density of 900 kg / m 3 , a permeability of 5 x 10 -13 m 2， , a diameter of 190 mm, a height of 1440 mm, a grid size of 2 mm, a wall thickness of 0.5 mm, and a total number of channels of 49 columns x 53 rows, including 3 columns of side feed channels 101a2, 4 columns of side discharge channels 102a3, and 6 regions of catalyst beds 102a1, each of which is filled with 6 columns of channels.

[0061] In this embodiment, the materials filled in the two catalyst beds 102a1 near the center position are a mixture of platinum-based catalyst, silicon carbide, and quartz sand, with a mass ratio of 1:1:2, and the materials filled in the four catalyst beds 102a1 near the outer wall are a mixture of platinum-based catalyst and silicon carbide, with a mass ratio of 1:3.

[0062] Further, the catalyst loading particle size is 0.1 mm, the catalyst effective coefficient is >99.9%, the bed bulk density is 1400 kg / m 3 , the bed porosity is 0.53, and the permeability is 5.64 x 10 -11 m 2 .

[0063] The operating conditions are a methylcyclohexane volumetric space velocity of 11.5 h -1 , a gas feed temperature of 150°C, a microwave frequency of 2.45 GHz, a total microwave input power of 6 kW, a reaction temperature of 350°C, and a reaction pressure of 0.1 MPa. The inlet composition is 63.6% methylcyclohexane and 36.4% hydrogen.

[0064] During the reaction, the raw material methylcyclohexane enters the quartz reaction tube 101 from the gas inlet pipe 401, and then enters the multi-stage channel biomimetic module 102 from the feed channel 101a. The gas material first enters the side feed channel 101a2 in the multi-stage channel biomimetic module 102, then permeates through the porous honeycomb cordierite wall, flows radially through the catalyst bed 102a1, and undergoes dehydrogenation. After the reaction, the gas product permeates through the porous honeycomb cordierite wall again, enters the side discharge channel 102a3, and then flows out of the multi-stage channel biomimetic module 102 after being collected. Subsequently, the product gas enters the discharge channel 101b and finally exits the reactor through the gas outlet pipe 402. The methylcyclohexane conversion rate is greater than 99%, the byproduct methane is less than 10 ppm, the hydrogen generation rate is greater than 5 g / min, and the bed pressure drop is 10 kPa.

[0065] In summary, the present application provides a microwave heating multi-stage channel biomimetic reactor for liquid storage hydrogen system, which realizes selective heating of the catalyst bed in the reactor by microwave heating technology, bypasses the resistance limitation of traditional heating methods, and improves the energy utilization rate; the multi-stage channel biomimetic module technology realizes the reduction of reaction pressure drop, so that small particle size catalyst particles can be used, the internal diffusion limitation is eliminated, the reaction flux and mass transfer efficiency are considered, and higher reaction efficiency is realized; by coupling the microwave heating technology with the multi-stage channel biomimetic module technology, the adaptation of electromagnetic field distribution and catalyst bed distribution is realized, which is beneficial to the miniaturization and modularization design of the reactor, and can be applied to mobile storage hydrogen system.

[0066] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and not to limit it, although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present application, which should be covered in the scope of the claims of the present application.

Claims

1. A microwave-heated multi-stage channel biomimetic reactor for liquid storage hydrogen system, characterized in that: The reaction structure (100) comprises a reaction tube (101) and a multi-stage channel biomimetic module (102) arranged in the cavity of the reaction tube (101). The multi-stage channel biomimetic module (102) comprises a reaction structure body (102a) located in the middle, a permeable wall surface (102b) arranged on the outer side wall of the reaction structure body (102a), and a sealing layer surface (102c) arranged on the top and bottom of the reaction structure body (102a) and the permeable wall surface (102b). The reaction structure body (102a) has a layered structure as a whole, comprising a catalyst bed layer (102a1), a side feed channel (102a2) and a side discharge channel (102a3), and the side feed channel (102a2) and the side discharge channel (102a3) are alternately distributed on both sides of the catalyst bed layer (102a1). The catalyst bed layer (102a1) is filled with a mixture of wave-absorbing medium, catalyst and dilution material. The catalyst bed layer (102a1) near the wall of the reaction tube (101) is filled with a mixture of wave-absorbing medium and catalyst, the catalyst bed layer (102a1) at the center of the reaction tube (101) is filled with a mixture of wave-absorbing medium and catalyst diluted with microwave-transparent material, and the mixing ratio of wave-absorbing medium and catalyst in the catalyst bed layer (102a1) near the wall is greater than that in the catalyst bed layer (102a1) at the center. The inlet of the side feed channel (102a2) extends to the surface of the sealing layer surface (102c) on the top, and the outlet of the side discharge channel (102a3) extends to the surface of the sealing layer surface (102c) on the bottom. The permeable wall surface (102b) is made of porous honeycomb ceramic, porous honeycomb cordierite or porous honeycomb silicon carbide The microwave source group (200) has several groups, is evenly distributed on the outer side of the axial direction of the reaction tube (101), and is in the same plane with the multi-stage channel biomimetic module (102), and comprises a microwave generator (201) and a rectangular waveguide (202). The multi-stage channel biomimetic module (102) is located at the middle position of the reaction tube (101), and divides the reaction tube (101) into two parts, forms a feed channel (101a) above the multi-stage channel biomimetic module (102), and forms a discharge channel (101b) below the multi-stage channel biomimetic module (102).

2. The microwave-heated multistage channelized biomimetic reactor for liquid storage hydrogen system of claim 1, wherein: Further comprising, 3. The microwave-heated multistage channelized biomimetic reactor for liquid stored hydrogen system according to claim 2, characterized in that: The shell structure (300) comprises an outer shell (301), an upper sealing cover (302) arranged on the top of the outer shell (301), and a lower sealing cover (303) arranged on the bottom of the outer shell (301). The reaction structure (100) is arranged in the middle of the inner cavity of the outer shell (301), and the microwave source group (200) is evenly arranged outside the outer shell (301).

4. The microwave-heated multistage channelized biomimetic reactor for liquid stored hydrogen system of claim 3, wherein: The inner cavity of the outer shell (301) is filled with heat preservation material (301a), and the heat preservation material (301a) wraps the outer wall of the tube body of the reaction tube (101).

5. The microwave-heated multistage channelized biomimetic reactor for liquid storage hydrogen system of claim 4, wherein: Further comprising, 6. The microwave-heated multistage channelized biomimetic reactor for liquid storage hydrogen system according to any one of claims 3-5, characterized in that: ​ The pipeline unit (400) comprises an air inlet pipe (401) and an air outlet pipe (402), one end of the air inlet pipe (401) penetrates through the upper end side wall of the outer shell (301) and communicates with the feeding channel (101a), and one end of the air outlet pipe (402) penetrates through the lower end side wall of the outer shell (301) and communicates with the discharging channel (101b).

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