Catalyst carrier of methanol-to-hydrogen system and supporting structure of catalyst carrier

Abstract

The invention provides a methanol hydrogen production system catalyst carrier and a supporting structure thereof, the catalyst carrier is a hollow cylinder structure formed by weaving and winding metal wires, a central through hole in the middle of the catalyst carrier is a stepped hole composed of multiple sections of inner holes, and the aperture of the stepped hole is gradually increased along the reaction direction in a reaction tube. The catalyst carrier is of a hollow structure, heat transfer is facilitated, the reaction efficiency is improved, the central through hole of the catalyst carrier is the stepped hole, the porosity of the catalyst carrier is also in stepped distribution in the axial direction of the stepped hole, the catalyst consumption can be reduced through cooperation of the central through hole and the stepped hole, and the reaction efficiency is further improved.

Description

Technical Field

[0001] This invention relates to the field of methanol-to-hydrogen equipment technology, and more particularly to a catalyst support for a methanol-to-hydrogen system, and a support structure for the catalyst support in a methanol-to-hydrogen system. Background Technology

[0002] Methanol-to-hydrogen catalysts are typically coated onto a support, and then the catalyst-coated support is loaded into the corresponding reaction tube of the hydrogen production reactor. Currently, in high-capacity methanol-to-hydrogen equipment, hollow catalyst supports are generally used due to the low temperature and low hydrogen production rate in the central part of the catalyst support. Auxiliary parts are then used to plug the pores in the hollow parts, resulting in low space utilization and additional weight.

[0003] Furthermore, catalyst support loading is difficult. To ensure smooth loading into the reaction tube, a relatively large tolerance range is typically allowed, resulting in the catalyst support not completely adhering to the inner wall of the reaction tube after loading, leaving a gap. This reduces heat transfer efficiency and affects hydrogen production yield. When the catalyst activity decreases and the catalyst support needs to be replaced, since there is no internal gripping point after loading into the reaction tube, disassembly requires the use of special tools to hook it from the outside. The disassembly process is cumbersome and can cause deformation of the support structure, making the coated catalyst prone to detachment. The detached catalyst powder may enter other flow channels of the reactor, causing blockage. Summary of the Invention

[0004] The present invention aims to provide a catalyst support for a methanol-to-hydrogen system to overcome the shortcomings of the prior art.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is: a catalyst support for a methanol-to-hydrogen system, wherein the catalyst support is a hollow cylindrical structure woven and wound from metal wires, and the central through hole in the middle of the catalyst support is a stepped hole composed of multiple segments of internal holes, and the pore diameter of the stepped holes gradually increases along the reaction direction inside the reaction tube, thereby gradually increasing the porosity of the catalyst support.

[0006] Furthermore, in the catalyst support of the aforementioned methanol-to-hydrogen system, the metal wire is made of iron-chromium-aluminum metal wire with a diameter of 0.2-0.5 mm.

[0007] Furthermore, the catalyst support of the methanol-to-hydrogen system described above includes multiple sets of support groups, which are arranged axially along the stepped pores.

[0008] Furthermore, in the catalyst support of the methanol-to-hydrogen system described above, each support group includes at least one sub-support, and the central through-hole diameter of the sub-support in each support group is the same, with each support group corresponding to a section of the inner hole of the stepped hole.

[0009] Furthermore, in the aforementioned methanol-to-hydrogen system catalyst support, the porosity of the catalyst support ranges from 80% to 90%.

[0010] Furthermore, in the aforementioned methanol-to-hydrogen system catalyst support, the porosity of the catalyst support gradually decreases from the inside to the outside along the cross-section of the catalyst support.

[0011] The present invention also provides a support structure for a catalyst carrier in a methanol-to-hydrogen system, including a central rod. The central rod includes a first installation section, a second installation section, and a third installation section arranged sequentially. The first installation section extends into the reaction tube and is connected to the end cap at the front end of the reaction tube. The second installation section is fitted with a catalyst carrier on its exterior. The second installation section and the catalyst carrier are fitted with a stepped hole with clearance. The third installation section is at least partially located outside the reaction tube and is connected to an end plate located outside the reaction tube.

[0012] Furthermore, in the aforementioned support structure of the catalyst carrier for the methanol-to-hydrogen system, the front end of the first installation section is provided with a threaded section, and the end cap is provided with a threaded hole that is threadedly connected to the threaded section.

[0013] Furthermore, in the aforementioned support structure of the catalyst carrier for the methanol-to-hydrogen system, a groove is provided between the threaded section and the second installation section, and a retaining plate is provided in the groove. The front end of the catalyst carrier, which is fitted onto the outside of the second installation section, is limited by the retaining plate, and the rear end abuts against the end of the third installation section.

[0014] Furthermore, in the aforementioned methanol-to-hydrogen system catalyst support structure, the outer side of the second installation section is adapted to the stepped holes of the catalyst support, and is distributed in a stepped manner; each stepped section of the second installation section is fitted with a set of support groups, and each set of support groups has an elastic partition at its front end.

[0015] Furthermore, in the aforementioned support structure of the catalyst carrier for the methanol-to-hydrogen system, the elastic partition includes an installation part and an elastic part located outside the installation part. The installation part is sleeved on the outside of the central rod, and the elastic part is an umbrella-shaped thin plate with multiple circumferentially distributed guide holes.

[0016] Furthermore, in the aforementioned support structure of the catalyst carrier for the methanol-to-hydrogen system, at least one connecting rod extending radially toward the central rod is provided on the outer side of the installation section three, and the connecting rod is connected to the end plate by fasteners.

[0017] Furthermore, the supporting structure of the catalyst carrier in the methanol-to-hydrogen system described above also has multiple operating grooves on the outer side of the installation section three.

[0018] Furthermore, in the aforementioned support structure of the catalyst carrier for the methanol-to-hydrogen system, the second and third mounting sections are hollow rods with a detection hole in the middle. A temperature sensor is provided at the rear end of the third mounting section. The detection hole contains multiple small holes arranged along the axial direction of the detection hole, and the small holes correspond to the temperature measurement points and are used to set the probe of the temperature sensor.

[0019] Compared with the prior art, the beneficial effects of the present invention are: The catalyst carrier of the present invention has a hollow annular structure, which is conducive to heat transfer and reduces the problem of insufficient heat in the center. The central part does not need to be coated with catalyst, which increases the effective utilization rate of catalyst. At the same time, the temperature difference of the entire catalyst coverage area is reduced, improving the reaction efficiency. Furthermore, the hollow structure can be effectively installed with the support structure, improving the ease of disassembly and assembly of the catalyst carrier.

[0020] The catalyst support of this invention exhibits a gradient pore distribution in both the cross-sectional and length directions, thereby addressing the issues caused by temperature differences in these directions, improving reaction efficiency, reducing catalyst usage, and saving costs. Furthermore, the central through-hole of the catalyst support is a stepped pore, and the porosity of the catalyst support also exhibits a stepped distribution in the axial direction of the stepped pore. The combination of these two features reduces catalyst usage and further improves reaction efficiency.

[0021] This invention significantly simplifies the loading and unloading process of the catalyst support, making installation and disassembly convenient and reducing the risk of damage to the catalyst and support. The pre-tightening structure (elastic baffles and clamping plates) ensures a tight arrangement of the supports, reducing the possibility of shaking and collisions and guaranteeing the stability of the catalyst support within the reactor. Furthermore, the hollow catalyst support structure and the appropriate gap between the support and the central rod facilitate heat transfer, improving heat transfer efficiency and mitigating the problem of low hydrogen production rate at the center. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the catalyst support structure for the methanol-to-hydrogen system of the present invention; Figure 2 This is a schematic cross-sectional view of the catalyst support assembly in the methanol-to-hydrogen system of the present invention. Figure 3 This is a schematic cross-sectional view of the catalyst support for the methanol-to-hydrogen system of the present invention. Figure 4 This is a schematic diagram of the support structure of the catalyst support in the methanol-to-hydrogen system of the present invention; Figure 5 This is a schematic cross-sectional view of the support structure of the catalyst support in the methanol-to-hydrogen system of the present invention. Figure 6 This is a partial schematic diagram of the support structure of the catalyst support in the methanol-to-hydrogen system of the present invention; Figure 7 This is a schematic diagram of the central rod of the supporting structure of the catalyst support in the methanol-to-hydrogen system of the present invention; Figure 8 This is a schematic diagram of the elastic partition supporting the catalyst carrier of the methanol-to-hydrogen system of the present invention. In the diagram: 1. Catalyst support; 11. Stepped pores; 12. Support group; 121. Sub-support; 2. Center rod; 21. Mounting section one; 211. Threaded section; 212. Slot; 22. Mounting section two; 23. Mounting section three; 231. Connecting rod; 232. Operating groove; 24. Inspection hole; 241. Small hole; 3. Reaction tube; 31. End cap; 4. End plate 5. Plate; 6. Elastic partition; 61. Mounting part; 62. Elastic part; 63. Guide hole; 7. Temperature sensor. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Example 1 like Figure 1-3 As shown, a catalyst support for a methanol-to-hydrogen system is provided. The catalyst support 1 is disposed inside the reaction tube 3 and is a hollow cylindrical structure made of woven and wound metal wires. The central through hole in the middle of the catalyst support 1 is a stepped hole 11 composed of multiple internal holes, and the pore size of the stepped hole 11 gradually increases along the reaction direction inside the reaction tube 3.

[0026] The metal wire is made of iron-chromium-aluminum metal wire with a diameter of 0.2-0.5mm. Specifically, the metal wire is first woven into a wire mesh with a weaving angle of 30°-60° and square or diamond-shaped mesh openings. Then, the wire mesh is wound into a hollow cylindrical structure.

[0027] like Figure 3 , 5As shown, the catalyst support 1 includes multiple support groups 12, which are arranged axially along the stepped holes 11. Each support group 12 includes at least one sub-support 121. The central through-hole diameter of each sub-support 121 in each support group 12 is the same, and each support group 12 corresponds to a section of the inner hole of the stepped hole 11. Specifically, the stepped hole 11 includes multiple sections of inner holes with different inner diameters. Each section of the inner hole is provided with a support group 12, and the central through-hole diameter of each support group 12 is the same. The stepped hole 11 is composed of a combination of the central through-holes of multiple support groups 12. The number of support groups 12 and sub-supports 121 can be flexibly adjusted according to the hydrogen production rate and the size of the reaction tube, such as... Figure 3 As shown, there are four sets of support groups 12 inside the reaction tube, and each set of support groups 12 has two sub-supports 121. The catalyst support is manufactured into standardized sub-supports, which are then assembled into a suitable catalyst support, providing good flexibility and facilitating mass production.

[0028] The porosity of catalyst support 1 ranges from 80% to 90%. The higher the porosity, the looser the support structure, and the less catalyst coating is required.

[0029] Along the cross-section of catalyst support 1, from the inside out, the porosity of catalyst support 1 gradually decreases. The porosity distribution across the cross-section corresponds to a decrease in temperature from the outside in, resulting in a reduction in catalytic reactions.

[0030] Along the reaction direction within reaction tube 3, the porosity of catalyst support 1 gradually increases. This porosity distribution corresponds to the reaction direction within reaction tube 3; as the temperature decreases, the catalytic reaction decreases.

[0031] Specifically, the outermost porosity of each carrier group 12 increases sequentially, with the outermost porosity ranging from 80-86% and the innermost porosity ≤90%. During installation, the carriers are loaded into the reaction tube 3 sequentially from front to back, according to the order of the outermost porosity from smallest to largest.

[0032] The methanol-to-hydrogen reaction is endothermic. As the reaction proceeds, the heat transfer fluid on the heating side gradually decreases in temperature along the flow direction. Inevitably, the heat transfer decreases from front to back (the reaction direction within the tube), leading to a significant temperature difference between the front and back of the tube. Since the methanol-to-hydrogen catalyst is highly sensitive to temperature, using a uniform coating amount across the entire process often results in lower actual hydrogen production efficiency in the latter half, reducing the amount of hydrogen produced per unit mass of catalyst and indirectly increasing the catalyst dosage. This problem caused by the temperature difference along the length direction is addressed through a stepped porosity distribution. Similarly, during heat transfer, since the heating side is outside the tube, heat is transferred from the outside to the inside. A stepped porosity distribution across the cross-section addresses the temperature difference problem in the cross-sectional direction.

[0033] The catalyst support of the present invention has a gradient distribution of pores in both the cross-section and length direction, thereby solving the problem caused by temperature difference in the cross-section and length direction, improving reaction efficiency, reducing catalyst dosage, and saving costs.

[0034] The catalyst support of this invention has a hollow annular structure, which facilitates heat transfer and reduces the problem of insufficient heat in the central area. The central portion does not require catalyst coating, increasing the effective utilization rate of the catalyst. Simultaneously, the temperature difference across the entire catalyst coverage area is reduced, improving reaction efficiency. Furthermore, the hollow structure allows for effective installation with the support structure, improving the ease of assembly and disassembly of the catalyst support. In addition, the central through-hole of the catalyst support is a stepped hole, and the porosity of the catalyst support also exhibits a stepped distribution along the axial direction of the stepped hole. These two factors combined reduce the amount of catalyst required and further improve reaction efficiency.

[0035] Example 2 like Figure 4-8 As shown, the present invention also provides a support structure for installing the catalyst carrier of the above-mentioned methanol-to-hydrogen system, including a central rod 2. The central rod 2 includes a first installation section 21, a second installation section 22, and a third installation section 23 arranged sequentially. The first installation section 21 extends into the reaction tube 3 and is connected to the end cap 31 at the front end of the reaction tube 3. The catalyst carrier 1 is fitted on the outside of the second installation section 22. The second installation section 22 is clearance-fitted with the stepped hole 11 of the catalyst carrier 1. The third installation section 23 is at least partially located outside the reaction tube 3 and is connected to the end plate 4 located outside the reaction tube 3.

[0036] The central rod 2 fills the hollow portion of the hollow catalyst carrier 1 and is made of high-strength, corrosion-resistant, and lightweight metal materials, such as stainless steel and titanium alloy, to ensure its long-term stable use in the reactor. The outer diameters of installation sections 1 (21), 22 (22), and 3 (23) are distributed in a stepped manner from smallest to largest. During installation, the catalyst carrier 1 is inserted into the central rod 2 through installation section 1 (21) to facilitate the installation of the catalyst carrier.

[0037] In the above structure, such as Figure 5-7 As shown, the front end of the installation section 21 is provided with a threaded section 211, and the end cover 31 is provided with a threaded hole that is threadedly connected to the threaded section 211.

[0038] A groove 212 is provided between the threaded section 211 and the second installation section 22. A retaining plate 5 is provided in the groove 212. The front end of the catalyst carrier 1, which is fitted outside the second installation section 22, is limited by the retaining plate 5, and the rear end abuts against the end of the third installation section 23. The retaining plate 5 cooperates with the third installation section 23 to prevent the carrier from falling off the central rod 2. During installation, the catalyst carrier 1 can be inserted into the central rod 2 first, and then inserted into the reaction tube 3 together with the central rod 2. It is not necessary to insert them into the reaction tube one by one, which makes the installation more convenient. When the catalyst carrier 1 is disassembled, it is used to provide a force support point for the elastic partition 6.

[0039] like Figure 5-6 As shown, the outer side of the second installation section 22 is adapted to the stepped holes 11 of the catalyst carrier 1 and is distributed in a stepped manner; each stepped section of the second installation section 22 is fitted with a set of carrier groups 12, and each set of carrier groups 12 has an elastic partition 6 at its front end.

[0040] like Figure 8 As shown, the elastic partition 6 includes a mounting part 61 and an elastic part 62 located outside the mounting part 61. The mounting part 61 is sleeved on the outside of the central rod 2. The elastic part 62 is an umbrella-shaped thin plate with a certain degree of elasticity and rigidity, and has multiple circumferentially distributed guide holes 63. The guide holes are fan-shaped holes with arc-shaped ends, guiding the reactants through the catalyst carrier 1.

[0041] like Figure 5 , 6 As shown in Figure 8, the mounting part of the elastic partition 6 between adjacent carrier groups 12 is a mounting through hole. The mounting part of the elastic partition 6 at the front end is a sleeve with a mounting through hole in the middle. The mounting through hole of each elastic partition 6 is smaller than the outer diameter of the stepped section of the second mounting section 22 on which the corresponding carrier group 12 is mounted, so that the elastic partition 6 abuts against the front end of the corresponding stepped section on the second mounting section 22, restricting its position. In addition, during the threaded locking process between the first mounting section 21 and the end cover 31, the central rod 2 continuously advances forward. After the elastic partition 6 at the front end abuts against the clamping plate 5, it begins to squeeze the catalyst carrier 1 and the elastic partition 6 at the rear end. Since the catalyst carrier is made of metal wire braided and wound, it has a certain elasticity. The backward compression causes the other elastic partitions 6 and the catalyst carrier 1 on the central rod 2 to elastically compress along the central rod axis. The catalyst carrier 1 expands radially outward and gradually fits against the inner wall of the reaction tube 3, which can make up for the installation gap reserved during installation and improve the heat transfer efficiency. Furthermore, during installation, a torque wrench is used to rotate the center rod 2. As the torque changes, when it reaches a predetermined range, a pre-tightening state is achieved, effectively locking the various carrier groups and preventing them from shaking or colliding during operation. During reactor operation, equipment vibration may cause the catalyst carriers to collide with each other, damaging both the catalyst and the carriers. The aforementioned locking structure ensures a tighter arrangement of the carriers, reducing the possibility of shaking and collisions, and minimizing the likelihood of carriers detaching due to vibration and angular changes, thus ensuring the stability of the carriers during operation.

[0042] When the catalyst carrier 1 needs to be replaced or repaired, the elastic baffle 6 can serve as an internal force point to help push the carrier out while reducing damage to the carrier, and pull the carrier out together with the central rod 2, avoiding the catalyst falling off that may be caused by directly operating the carrier during disassembly.

[0043] like Figure 4As shown, at least one connecting rod 231 extending radially toward the central rod 2 is provided on the outer side of the installation section 3 23. In this embodiment, two connecting rods 231 are provided, and the connecting rods 231 are connected to the end plate 4 by fasteners. The connecting rods 231 can stably fix the central rod in the reactor and prevent it from shifting during operation.

[0044] like Figure 4-7 As shown, the outer side of the installation section 3 is also provided with multiple operating grooves 232. During assembly and disassembly, the central rod 2 can be easily and quickly pushed in and pulled out through the operating grooves, thereby easily placing the support structure and catalyst carrier into or removing the reaction tube 3.

[0045] like Figure 4-6 As shown, mounting sections 23 and 3 are hollow rods with a detection hole 24 in the middle. A temperature sensor 7 is located at the rear end of mounting section 3. Multiple small holes 241 arranged axially along the detection hole 24 are provided within the detection hole 24, corresponding to the temperature measurement points and used to mount the probe of the temperature sensor 7. The hollow design of the central rod 2 not only reduces weight but also facilitates the mounting of the temperature sensor. Conventional temperature sensor probes are attached between the inner wall of the reaction tube and the catalyst carrier, resulting in inaccurate temperature detection with significant errors compared to the actual temperature of the catalyst coating area, and also affecting the assembly and disassembly of the catalyst carrier. In this embodiment, the temperature sensor probe is located inside the detection hole, without affecting the installation of the catalyst carrier. Furthermore, the multiple small holes arranged axially along the detection hole 24 allow the probe to be attached to the inside of the stepped holes in the catalyst carrier, enabling accurate detection of the actual temperature field distribution during the reaction process.

[0046] In summary, this invention significantly simplifies the loading and unloading process of the catalyst support, making installation and disassembly convenient and reducing the risk of damage to the catalyst and support. The pre-tightening structure (elastic baffles and clamping plates) ensures a tight arrangement of the supports, reducing the possibility of shaking and collisions and guaranteeing the stability of the catalyst support within the reactor. Furthermore, the hollow catalyst support structure and the appropriate gap between the support and the central rod facilitate heat transfer, improving heat transfer efficiency and mitigating the problem of low hydrogen production rate at the center.

[0047] The working principle of the support structure of the present invention is as follows: During installation, the carrier group 12 and the elastic partition 6 of the catalyst carrier 1 are installed one by one onto the central rod 2. The carrier is pre-tightened using the clamping plate 5, and the pre-tightening force is adjusted to a suitable range. Force is applied to the operating groove 232 to push the support structure containing the catalyst carrier 1 into the reaction tube 3 and fix it inside the reaction tube 3. When it is necessary to disassemble the catalyst carrier 1, the connection between the connecting rod 231 and the end plate 4 is first disassembled. Then, the central rod 2 is rotated to release the threaded connection between the threaded section 211 and the cover plate 31. During this process, the elastic partition 6 returns to its original state, and the catalyst carrier 1 no longer adheres to the inner wall of the reaction tube 3, playing an internal assisting role. At this time, the catalyst carrier 1 and the central rod 2 can be easily pulled out from the reaction tube 3.

[0048] To verify the performance of the catalyst support and structure of this invention, experimental verification was conducted. At 30 Nm... 3 In a methanol-to-hydrogen unit with a capacity of [number] h, there are 12 reaction tubes, each 450 mm long and 30 mm in inner diameter. Each reaction tube has 10 catalyst carriers, for a total of 120 catalyst carriers installed in the reactor. Sensors are placed on 3 reaction tubes. The temperature sensor probes have a diameter of 1 mm, a maximum length of 400 mm, and a minimum length of 200 mm. The central support rod has 5 steps, and there are 5 baffles. There are 5 groups of catalyst carriers, with the following loading quantities for each group: 3, 3, 2, 1, and 1 respectively. The central aperture diameters are 6 mm, 6.8 mm, 8 mm, 9.5 mm, and 11 mm, corresponding to the dimensions of the central rod steps and the baffle openings. The preload is 1.2 N·m.

[0049] Comparative tests during actual operation: In the table above, assembly / disassembly method 1 uses the catalyst carrier and support structure of this invention, while assembly / disassembly method 2 uses the existing conventional catalyst carrier installation structure and assembly / disassembly method (i.e., pushing the carriers one by one into the reaction tube and removing them one by one using a special tool). Results show that, calculating the amount of carrier deformation based on a deformation of the carrier diameter and height exceeding 10%, assembly / disassembly method 1 using the support structure offers significant advantages in terms of installation and removal time. Conventional assembly / disassembly method 2 is cumbersome and slow, and the conventional sensor probes are clamped between the catalyst carrier and the inner wall of the reaction tube, resulting in excessively tight contact between the catalyst carrier and the inner wall, especially at the rear of the catalyst carrier, where there are three sensor probes between them and the inner wall. These small sensor probes are easily broken during catalyst carrier disassembly. Experiments demonstrate that the catalyst carrier of this invention reduces loading time by 62.5% and disassembly time by 80%, making it very user-friendly for catalyst carrier assembly / disassembly.

[0050] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0051] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A catalyst support for a methanol-to-hydrogen system, characterized in that: The catalyst support is a hollow cylindrical structure woven and wound from metal wires. The central through hole in the middle of the catalyst support is a stepped hole composed of multiple internal holes. Along the reaction direction inside the reaction tube, the diameter of the stepped hole gradually increases, and the porosity of the catalyst support gradually increases.

2. The catalyst support for the methanol-to-hydrogen system according to claim 1, characterized in that: The metal wire is made of iron-chromium-aluminum metal wire with a diameter of 0.2-0.5mm.

3. The catalyst support for the methanol-to-hydrogen system according to claim 1, characterized in that: The catalyst support comprises multiple sets of support groups, which are arranged axially along the stepped pores.

4. The catalyst support for the methanol-to-hydrogen system according to claim 3, characterized in that: Each carrier group includes at least one sub-carrier. The central through-hole diameter of the sub-carrier in each carrier group is the same, and each carrier group is correspondingly set with a section of the inner hole of the stepped hole.

5. The catalyst support for the methanol-to-hydrogen system according to claim 1, characterized in that: The porosity of the catalyst support ranges from 80% to 90%.

6. The catalyst support for the methanol-to-hydrogen system according to claim 5, characterized in that: Along the cross-section of the catalyst support, from the inside out, the porosity of the catalyst support gradually decreases.

7. A support structure for mounting a catalyst support in a methanol-to-hydrogen system as described in any one of claims 1-6, characterized in that: The device includes a central rod comprising, in sequence, three mounting sections: mounting section one, mounting section two, and mounting section three. Mounting section one extends into the reaction tube and connects to the end cap at the front end of the reaction tube. Mounting section two is fitted with a catalyst carrier, and the mounting section two is clearance-fitted with the stepped holes of the catalyst carrier. Mounting section three is at least partially located outside the reaction tube and is connected to an end plate located outside the reaction tube.

8. The supporting structure of the catalyst support for the methanol-to-hydrogen system according to claim 7, characterized in that: The front end of the first installation section is provided with a threaded section, and the end cap is provided with a threaded hole that is threadedly connected to the threaded section.

9. The supporting structure of the catalyst support for the methanol-to-hydrogen system according to claim 8, characterized in that: A groove is provided between the threaded section and the second installation section, and a retaining plate is provided in the groove. The front end of the catalyst carrier, which is fitted outside the second installation section, is limited by the retaining plate, and the rear end abuts against the end of the third installation section.

10. The supporting structure of the catalyst support for the methanol-to-hydrogen system according to claim 7, characterized in that: The outer side of the second installation section is adapted to the stepped holes of the catalyst carrier and is distributed in a stepped manner; each stepped section of the second installation section is fitted with a set of carrier groups, and each set of carrier groups has an elastic partition at its front end.

11. The supporting structure of the catalyst support for the methanol-to-hydrogen system according to claim 10, characterized in that: The elastic partition includes a mounting part and an elastic part located outside the mounting part. The mounting part is sleeved on the outside of the central rod. The elastic part is an umbrella-shaped thin plate with multiple circumferentially distributed guide holes.

12. The supporting structure of the catalyst support for the methanol-to-hydrogen system according to claim 7, characterized in that: The outer side of the installation section three is provided with at least one connecting rod extending radially toward the center rod, and the connecting rod is connected to the end plate by fasteners.

13. The supporting structure of the catalyst support for the methanol-to-hydrogen system according to claim 7, characterized in that: The outer side of the third mounting section is also provided with multiple operating grooves.

14. The supporting structure of the catalyst support for the methanol-to-hydrogen system according to claim 7, characterized in that: The second and third installation sections are hollow rods with a detection hole in the middle. A temperature sensor is provided at the rear end of the third installation section. The detection hole has multiple small holes arranged along the axial direction of the detection hole. The small holes correspond to the temperature measurement points and are used to set the probe of the temperature sensor.

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