Catalytic hydrolysis hydrogen production device and method

Abstract

The application belongs to the technical field of hydrogen production by catalytic hydrolysis, and relates to a hydrogen production device and method by catalytic hydrolysis. The hydrogen production device by catalytic hydrolysis comprises a reaction cavity and a hydrogen storage tank which are connected with each other. A catalyst is arranged in the reaction cavity and connected with a liquid inlet chamber of an ammonia borane reaction liquid. A liquid inlet piston is arranged in the liquid inlet chamber. An air inlet, an air pressure stabilizing piston assembly and an air outlet are arranged in the hydrogen storage tank from top to bottom. The air pressure stabilizing piston assembly comprises an air pressure stabilizing piston body, a guide rod assembly, an upper limit stopper and a lower limit stopper. The upper limit stopper and the lower limit stopper are arranged on the inner wall of the hydrogen storage tank. The air pressure stabilizing piston body has a set weight and is sealingly and movably installed through the guide rod assembly, so that the air pressure stabilizing piston body can sealingly slide up and down in the hydrogen storage tank. The application discards the hydrogen supply mode of on-demand production and use of ammonia borane catalytic hydrolysis at normal temperature and pressure, replaces the use of high-pressure hydrogen storage steel cylinders, and effectively reduces the safety hazards.

Description

Technical Field

[0001] This invention belongs to the field of catalytic hydrolysis for hydrogen production technology, specifically relating to a catalytic hydrolysis hydrogen production device and a hydrogen production method. Background Technology

[0002] The statements herein provide only background information in relation to this invention and do not necessarily constitute prior art.

[0003] Hydrogen energy is a clean and efficient energy carrier, widely used in experimental research in chemistry, materials science, energy, and related fields. However, current conventional methods of hydrogen use in laboratories have many drawbacks. Currently, most laboratories use high-pressure hydrogen storage cylinders as their primary hydrogen source. These cylinders store hydrogen at high pressures, posing safety hazards such as leakage and explosion during handling, storage, and use. Furthermore, most commercially available hydrogen production equipment is complex in structure, bulky, and expensive, with cumbersome operating procedures and high professional requirements for operators. This makes it difficult to meet the daily needs of laboratories for convenient, flexible, and on-demand hydrogen production and use, impacting the efficiency and safety of experiments.

[0004] On the other hand, in off-grid scenarios such as outdoor exploration, field training, and power supply for small outdoor equipment where there is no municipal power grid access, existing power supply methods mostly rely on batteries or fuel generators. Batteries have limited range, and generators are noisy and pollute the environment, neither of which can meet the convenient power supply needs of small power and scattered applications.

[0005] Ammonia borane catalytic water splitting for hydrogen production and its co-operation with fuel cells can provide a distributed green power supply solution for the aforementioned off-grid scenarios. However, during the ammonia borane catalytic water splitting process, the concentration of the ammonia borane reaction solution and the activity of the catalyst change over time, making it difficult to precisely control the hydrogen production rate and ensuring a continuous and stable supply of hydrogen for hydrogen-using equipment such as hydrogen power generation devices. Summary of the Invention

[0006] To address the shortcomings of existing technologies, the purpose of this invention is to provide a catalytic hydrolysis hydrogen production device and method.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solution: In a first aspect, the present invention provides a catalytic hydrolysis hydrogen production device, comprising a reaction chamber and a hydrogen storage chamber connected to each other, wherein a catalyst is provided in the reaction chamber and is connected to the inlet chamber of an ammonia borane reaction liquid, and an inlet piston is provided in the inlet chamber. The hydrogen chamber is provided with an air inlet, a pressure stabilizing piston assembly and an air outlet from top to bottom, with the air outlet located at the bottom of the hydrogen chamber. The pressure stabilizing piston assembly includes a pressure stabilizing piston body, a guide rod assembly, an upper limit stop, and a lower limit stop. The upper limit stop and the lower limit stop are both disposed on the inner wall of the hydrogen chamber or on the guide rod assembly, and are used to limit the upper and lower limits of the sliding of the pressure stabilizing piston body. The main body of the pressure stabilizing piston has a set weight, and a hydrogen pressure sensor is installed below it. The sensor is installed in a sealed manner through a guide rod assembly, allowing it to slide up and down the hydrogen chamber in a sealed manner.

[0008] In a second aspect, the present invention provides a method for producing hydrogen through catalytic hydrolysis, comprising the following steps: The ammonia borane reaction solution is injected into the reaction chamber. Under the catalytic action of the catalyst, the ammonia borane reaction solution hydrolyzes to produce hydrogen. The generated hydrogen enters the hydrogen chamber. As the reaction proceeds, the pressure stabilizing piston slides upward under the hydrogen pressure. When it reaches 1 / 5 to 2 / 3 of the height of the hydrogen chamber, the valve between the hydrogen chamber and the hydrogen-using equipment is opened to supply hydrogen to the hydrogen-using equipment. During the process of simultaneous hydrogen production and supply, when the main body of the pressure stabilizing piston slides upward to the set height, the liquid inlet piston extracts the ammonia borane reaction liquid in the reaction chamber, separates the ammonia borane reaction liquid from the catalyst, and stops the catalytic hydrolysis to produce hydrogen. At this time, the main body of the pressure stabilizing piston slides down, squeezing the hydrogen in the hydrogen chamber outward. When the pressure stabilizing piston body slides down to the set height, the liquid inlet piston pushes the ammonia borane reaction liquid into the reaction chamber to carry out catalytic hydrolysis to produce hydrogen. The above operations are repeated.

[0009] The beneficial effects achieved by one or more embodiments of the present invention described above are as follows: In the catalytic hydrolysis of ammonia borane to produce hydrogen, excessive hydrogen pressure in the storage tank can significantly inhibit hydrogen production. The hydrogen production device of this invention is generally suitable for the simultaneous external hydrogen supply process of catalytic hydrolysis of ammonia borane. The hydrogen storage chamber stores the hydrogen generated by catalytic hydrolysis and is equipped with a pressure-stabilizing piston assembly. As hydrogen is produced, the hydrogen pressure in the chamber gradually increases. When the pressure increases to the point where it can overcome the gravity of the pressure-stabilizing piston, the piston body can slide upwards under the pressure of the hydrogen until it reaches the upper limit slider. During this process, the hydrogen pressure in the chamber remains relatively stable and low, which is beneficial for the continuous catalytic hydrolysis of ammonia borane to produce hydrogen. Simultaneously, the low hydrogen pressure in the chamber reduces safety risks to some extent.

[0010] The hydrogen chamber of this invention serves as a buffer chamber for hydrogen produced by the catalytic hydrolysis of ammonia borane. It can buffer and store the produced hydrogen and supply it stably to ensure the stable operation of hydrogen-using equipment.

[0011] After the ammonia borane reaction solution is extracted from the reaction chamber, hydrogen gas is discharged from the hydrogen outlet. During the hydrogen discharge process, the hydrogen pressure decreases. At this time, the pressure stabilizing piston body will slide down under its own gravity. This serves two purposes: firstly, it provides pressure for the external hydrogen supply; secondly, by placing the lower limit stop above the outlet, it facilitates the discharge of most of the hydrogen gas from the hydrogen chamber. When the hydrogen production unit is not used for a long time or is being moved, purging the internal hydrogen gas can significantly reduce safety risks.

[0012] Furthermore, the hydrogen production device in this invention primarily requires electricity for the processes of injecting the reaction liquid into the reaction chamber using a motor-driven inlet piston, or extracting the reaction liquid from the reaction chamber. The required power is relatively low, so a battery can meet the requirements, enabling hydrogen use in outdoor exploration, field training, and other similar scenarios. In extreme cases where no starting power source is available, the hydrogen production reaction can be started manually with zero power consumption. The generated hydrogen then drives a fuel cell to generate electricity, powering the hydrogen generator for continuous operation.

[0013] In off-grid power supply scenarios, the method of this invention can partially replace the use of diesel and gasoline generators, reduce exhaust gas pollution and noise pollution, and achieve near-zero emissions in the hydrogen production process, thus demonstrating outstanding energy-saving and emission-reduction benefits. Attached Figure Description

[0014] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0015] Figure 1 This is a schematic diagram of the catalytic hydrolysis hydrogen production device according to an embodiment of the present invention.

[0016] In the diagram: 1. Hydrogen sensor, 2. Pressure stabilizing piston body, 3. Upper limit stop, 4. Hydrogen chamber, 5. Lower limit stop, 6. Mass flow meter, 7. Gas outlet, 8. Hydrogen pressure sensor, 9. Reaction chamber, 10. Main valve, 11. Liquid inlet valve, 12. Liquid outlet valve, 13. Liquid inlet chamber, 14. Liquid inlet piston, 15. Reaction liquid storage tank, 16. Waste liquid storage tank, 17. Liquid inlet pipe, 18. Liquid outlet pipe, 19. Nitrogen blow valve, 20. Safety valve. Detailed Implementation

[0017] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0018] In view of the technical problems mentioned in the background art, the present invention provides a catalytic hydrolysis hydrogen production device, including a reaction chamber and a hydrogen chamber that are interconnected. A catalyst is provided in the reaction chamber and is connected to the inlet chamber of the ammonia borane reaction liquid. An inlet piston is provided in the inlet chamber. The hydrogen chamber is provided with an air inlet, a pressure stabilizing piston assembly and an air outlet from top to bottom, with the air outlet located at the bottom of the hydrogen chamber. The pressure stabilizing piston assembly includes a pressure stabilizing piston body, a guide rod assembly, an upper limit stop, and a lower limit stop. The upper limit stop and the lower limit stop are both disposed on the inner wall of the hydrogen chamber or on the guide rod assembly, and are used to limit the upper and lower limits of the sliding of the pressure stabilizing piston body. The main body of the pressure stabilizing piston has a set weight, and a hydrogen pressure sensor is installed below it. The sensor is installed in a sealed manner through a guide rod assembly, allowing it to slide up and down the hydrogen chamber in a sealed manner.

[0019] The catalytic hydrolysis hydrogen production device of the present invention operates at constant pressure in principle. The pressure is generated by atmospheric pressure, piston weight, and counterweight. If a pressure range is set, it is achieved by adding or removing counterweight.

[0020] The reaction chamber, as the core of the ammonia borane catalytic hydrolysis reaction, contains the catalyst and is connected to the liquid inlet chamber to receive the reaction liquid. The liquid inlet chamber is used to temporarily store the ammonia borane reaction solution. The liquid inlet piston controls the injection and extraction of the reaction solution by pushing / pulling, thereby starting and stopping the reaction. This can solve the problems of slow reaction response and delayed start-up control in traditional equipment. The rapid movement of the mechanical piston enables instant start-up and shutdown, improving the controllability of catalytic hydrolysis hydrogen production.

[0021] In the catalytic hydrolysis of ammonia borane to produce hydrogen, excessive hydrogen pressure in the storage tank can significantly inhibit hydrogen production. In this invention, a hydrogen chamber stores the hydrogen generated by catalytic hydrolysis. The chamber contains a pressure-stabilizing piston. As hydrogen is produced, the hydrogen pressure in the chamber gradually increases. When the pressure increases to a level sufficient to overcome the weight of the pressure-stabilizing piston, the piston slides upwards under the pressure of the hydrogen until it reaches the upper limit slider. During this process, the hydrogen pressure in the chamber remains relatively stable and low, which is beneficial for the continuous catalytic hydrolysis of ammonia borane to produce hydrogen. Simultaneously, the lower hydrogen pressure in the chamber reduces safety risks to some extent.

[0022] Under normal circumstances, hydrogen is supplied to the outside simultaneously during the hydrogen production process of ammonia borane catalysis. If the hydrogen production rate is greater than the hydrogen consumption rate, the hydrogen that accumulates in the hydrogen tank will cause the main body of the pressure stabilizing piston to rise. When the main body of the pressure stabilizing piston rises to the upper limit block, the reaction liquid in the reaction chamber can be drawn back into the liquid inlet chamber by pulling the liquid inlet piston in the liquid inlet chamber, thereby separating the reaction liquid from the catalyst and terminating the catalytic hydrolysis hydrogen production reaction.

[0023] At this point, hydrogen can be continuously supplied to the outside. During the hydrogen discharge process, the hydrogen pressure inside the hydrogen chamber decreases. The pressure stabilizing piston will then slide down under its own weight. This provides pressure for the external hydrogen supply and, by placing the lower limit stop above the outlet, facilitates the discharge of most of the hydrogen from the chamber. When the hydrogen production unit is not in use for an extended period or is being moved, purging the internal hydrogen can significantly reduce safety risks.

[0024] Furthermore, the hydrogen production device in this invention primarily requires electricity for the processes of injecting the reaction liquid into the reaction chamber using a motor-driven inlet piston, or extracting the reaction liquid from the reaction chamber. The required power is relatively low, so a battery can meet the requirements, enabling hydrogen use in outdoor exploration, field training, and other similar scenarios. In off-grid power supply scenarios, it can partially replace diesel and gasoline generators, reducing exhaust and noise pollution. The hydrogen production process achieves near-zero emissions, demonstrating significant energy-saving and emission-reduction benefits.

[0025] This invention employs a room-temperature, atmospheric-pressure ammonia-borane catalytic hydrolysis method for on-demand hydrogen production, eliminating the need for high-pressure hydrogen storage cylinders. This eliminates safety hazards such as leakage and explosion during hydrogen storage and transportation, significantly improving hydrogen safety in laboratories, research platforms, field exploration, and outdoor training scenarios. It also greatly reduces the professional qualification requirements for operators, making the process safer and more reliable.

[0026] In terms of energy efficiency and environmental protection, the hydrogen production reaction of ammonia borane catalytic hydrolysis can be carried out spontaneously at room temperature and pressure, requiring only a small amount of electricity to maintain the operation of the intelligent control system. The entire hydrogen production process produces no pollutants such as carbon dioxide, sulfides, and nitrogen oxides, making it a truly zero-carbon hydrogen production route.

[0027] The device of this invention has a simplified and compact structure, eliminating the need for high-pressure containers, high-temperature reaction components, and large electrolysis modules. The overall design achieves miniaturization, lightweighting, and modularity, facilitating transportation, installation, and rapid deployment. Ammonia borane, used as the hydrogen storage medium, is a stable solid at room temperature and pressure, eliminating the need for high-pressure storage tanks and high-pressure filling equipment during storage and transportation. With large-scale application, the cost of hydrogen production can be comparable to mainstream hydrogen production methods, demonstrating significant economic advantages.

[0028] The device of this invention produces hydrogen with high purity, directly meeting the high-purity hydrogen requirements for fuel cell power supply, precision laboratory reactions, and gas chromatography analysis. The hydrogen production rate is precisely controllable, with rapid start-up and shutdown response, and excellent system stability and durability. The device can be flexibly adapted to various scenarios such as safe hydrogen supply for university laboratories, off-grid power supply in the field, emergency rescue power supply, distributed hydrogen energy storage, and power supply for small outdoor equipment. It promotes the popularization of hydrogen energy towards miniaturization, scenario-based application, civilian use, and portability, providing key technical support for energy structure transformation and the promotion and application of clean energy, and possesses broad social value and market application prospects.

[0029] In some embodiments, a counterweight is provided on the pressure-stabilizing piston body. The operating pressure inside the hydrogen chamber is adjusted by adjusting the weight of the counterweight and the mass of the pressure-stabilizing piston body.

[0030] In some embodiments, the guide rod assembly includes at least three guide rods, which are vertically arranged and matrix-arranged.

[0031] The pressure-stabilizing piston body needs to slide up and down along the inner wall of the hydrogen chamber when the hydrogen pressure changes to maintain pressure stability. If there are not enough guide rods, the piston is prone to tilting due to uneven force, leading to seal failure. At least three guide rods form a spatially geometrically stable structure (such as a triangular or rectangular matrix arrangement), which limits the radial displacement of the piston through multi-point support, ensuring that it always slides vertically along the axial direction and avoiding jamming or seizing.

[0032] The piston body is sealed to the inner wall of the hydrogen chamber and the guide rods by lubricating oil. The matrix-arranged guide rods can evenly transmit the piston's own weight and hydrogen pressure to the chamber wall, avoiding excessive local sealing pressure that could lead to lubricating oil leakage or wear of the seals.

[0033] During the hydrogen production-use cycle, the piston needs to move up and down. The matrix arrangement of guide rods can reduce the load on individual guide rods, avoid bending or breakage caused by stress concentration after long-term use, and extend the service life of the device.

[0034] Preferably, the main body of the pressure stabilizing piston is provided with through holes, the number of through holes corresponding to the number of guide rods, and the guide rods are disposed through the through holes; The pressure stabilizing piston body and the guide rod, as well as the pressure stabilizing piston body and the inner wall of the hydrogen chamber, are sealed with lubricating oil.

[0035] The number of through holes corresponds one-to-one with the guide rods, allowing the guide rods to pass through the piston body and form a rigid constraint. This ensures that the piston slides only axially (up and down), preventing radial tilting caused by uneven hydrogen pressure. The cooperation between the through holes and the guide rods evenly distributes the pressure on the piston to multiple guide rods, reducing the load on individual guide rods and preventing bending or breakage due to stress concentration after long-term use. The gaps between the piston, guide rods, and the inner wall of the hydrogen chamber are filled with lubricating oil, forming a liquid sealing layer that blocks the path of hydrogen escape from the gaps, solving the safety hazard of hydrogen leakage in high-pressure hydrogen storage scenarios. The viscosity of the lubricating oil allows it to continuously adhere to the sealing surface during piston sliding, maintaining a long-term sealing effect. As a lubricant, the lubricating oil significantly reduces the coefficient of friction between the piston, guide rods, and chamber walls, ensuring that the piston can respond quickly to pressure changes (such as pressure drop when using hydrogen), avoiding pressure fluctuations caused by jamming.

[0036] In some embodiments, a first distance sensor is provided on the upper surface of the pressure stabilizing piston body, and a second distance sensor is provided on the lower surface.

[0037] All sensors used in this invention can be wireless sensors.

[0038] The first and second distance sensors can measure the operating position of the pressure stabilizing piston body in real time. When the pressure stabilizing piston body moves upward and reaches the set distance from the upper limit stop, the first distance sensor can detect the distance signal and transmit it to the controller. The controller then controls the liquid inlet piston to extract the ammonia borane reaction liquid. Since the extraction of the reaction liquid requires a certain amount of time, the reaction liquid will continue to catalytically hydrolyze to produce hydrogen during this period. Utilizing this delay effect, the pressure stabilizing piston body can still rise to the upper limit stop. Extracting the reaction liquid in advance can prevent excessive hydrogen pressure in the hydrogen chamber, thereby ensuring safe operation.

[0039] Similarly, when the reaction liquid is extracted from the reaction chamber and hydrogen is continuously supplied externally, the pressure stabilizing piston body will continue to slide down. When it slides down to the distance set by the lower limit stop, the second distance sensor collects the signal and transmits it to the controller. The controller then controls the inlet piston to re-inject the ammonia borane reaction liquid into the reaction chamber for catalytic hydrolysis to produce hydrogen. Since the injection of the ammonia borane reaction liquid requires a certain amount of time, injecting it into the reaction chamber before the pressure stabilizing piston body slides down to the lower limit stop can avoid situations such as unstable hydrogen supply caused by untimely hydrogen production.

[0040] In some embodiments, the hydrogen chamber is further provided with a top cover, which is sealed to the top of the hydrogen chamber. The air inlet is provided on the top cover, and a hydrogen sensor is provided on the inner wall of the top cover. The upper end of the guide rod assembly is fixed to the inner wall of the top cover.

[0041] The top cover seals onto the top of the hydrogen tank and provides a mounting platform for the air inlet, hydrogen sensor, and guide rod assembly.

[0042] A hydrogen sensor is installed on the inner wall of the top cover, which can detect abnormal hydrogen concentration in the chamber between the top cover and the pressure stabilizing piston body in real time (such as leakage caused by seal failure), and trigger an alarm device through the controller. The upper end of the guide rod assembly is fixed to the inner wall of the top cover, forming a vertical rigid support with the lower end (fixed to the bottom of the chamber or the lower limit block), ensuring that the pressure stabilizing piston body slides accurately along the axial direction.

[0043] To ensure the smooth up-and-down sliding of the pressure-stabilizing piston body, the chamber between the top cover and the piston body should be pressure-balanced with the external environment to prevent excessive or insufficient pressure from affecting the stable operation of the piston body. The air inlet is located on the top cover and directly connects to the outside environment, serving to balance the pressure.

[0044] Preferably, the catalytic hydrolysis hydrogen production device further includes a reaction liquid storage tank and a waste liquid storage tank. The outlet of the inlet chamber is connected to the reaction chamber, the reaction liquid storage tank, and the waste liquid storage tank respectively via a four-way valve, and valves are installed on the connecting pipelines. This facilitates the discharge of reaction waste liquid and the replacement of fresh reaction liquid.

[0045] More preferably, the bottom of the hydrogen storage chamber is connected to a vent pipe, a safety valve is installed on the vent pipe, the safety valve is connected to the bottom of the vent pipe, and the top of the vent pipe extends upward to connect with the outside.

[0046] In emergency situations, such as when the pressure stabilizing piston slides up and gets stuck, causing the hydrogen pressure in the hydrogen chamber to exceed the threshold; or when the liquid inlet piston malfunctions, preventing the timely extraction of the ammonia borane reaction liquid and causing the hydrogen pressure in the hydrogen chamber to continue to rise, the safety valve can be opened immediately to release the hydrogen in the hydrogen chamber to a high place outdoors to avoid safety hazards.

[0047] In addition, when the hydrogen-using equipment is finished, the ammonia borane catalytic hydrogen production stops, and the external hydrogen supply also stops. At this time, the hydrogen in the hydrogen storage tank needs to be discharged through the vent pipe to further avoid safety hazards during hydrogen storage.

[0048] In a further preferred embodiment, the sidewall of the reaction chamber is connected to a nitrogen source via a nitrogen blowing pipe, and a nitrogen blowing valve is installed on the nitrogen blowing pipe.

[0049] When the hydrogen production unit is shut down, if it is not used for a long time or needs to be relocated, nitrogen gas is blown into the reaction chamber through the nitrogen blowing pipe, and the residual hydrogen gas in the reaction chamber and hydrogen storage is discharged out through the vent pipe to minimize safety hazards.

[0050] A further preferred embodiment includes a controller, which is connected to each sensor and each valve respectively.

[0051] In a further preferred embodiment, the hydrogen sensor is connected to the controller, and the controller is connected to the alarm device.

[0052] In some embodiments, the number of upper limit blocks and lower limit blocks is 2-10. The upper limit blocks are arranged in a horizontal ring along the inner wall of the hydrogen chamber, and the lower limit blocks are arranged in a horizontal ring along the inner wall of the hydrogen chamber. The number of upper limit blocks and lower limit blocks can be 2, 3, 4, 5, 6, 7, 8, 9 or 10.

[0053] In some embodiments, the lower limit block is positioned above the lowest point of the guide rod.

[0054] The lower limit stop is positioned higher than the bottom of the guide rod. This is mainly to ensure that the air pressure stabilizer piston body can still be effectively supported by the guide rod assembly when it slides down to the lower limit position, thus avoiding sealing failure or sliding jamming due to loss of guide constraint.

[0055] In some embodiments, the catalyst is placed in a pull-out cage, which includes a cage with evenly distributed through holes and a sealing plate connected together. A sealing ring is provided around the sealing plate to seal the reaction chamber, and a gripper is provided on the sealing plate.

[0056] The catalyst is placed inside the pull-out cage and can be directly pulled out and replaced using the handles on the sealing plate without disassembling the entire reaction chamber structure. Through holes are provided in the cage to ensure full contact between the ammonia-borane reaction solution and the catalyst. The sealing rings around the sealing plate fit tightly against the reaction chamber interface to prevent leakage of the reaction solution and hydrogen.

[0057] In some embodiments, the number of reaction chambers is at least two, and the number of liquid inlet chambers is equal to the number of reaction chambers, and they are matched one by one.

[0058] In a second aspect, the present invention provides a method for producing hydrogen through catalytic hydrolysis, comprising the following steps: The ammonia borane reaction solution is injected into the reaction chamber. Under the catalytic action of the catalyst, the ammonia borane reaction solution hydrolyzes to produce hydrogen. The generated hydrogen enters the hydrogen chamber. As the reaction proceeds, the pressure stabilizing piston slides upward under the hydrogen pressure. When it reaches 1 / 5 to 2 / 3 of the height of the hydrogen chamber, the valve between the hydrogen chamber and the hydrogen-using equipment is opened to supply hydrogen to the hydrogen-using equipment. During the process of simultaneous hydrogen production and supply, when the main body of the pressure stabilizing piston slides upward to the set height, the liquid inlet piston extracts the ammonia borane reaction liquid in the reaction chamber, separates the ammonia borane reaction liquid from the catalyst, and stops the catalytic hydrolysis to produce hydrogen. At this time, the main body of the pressure stabilizing piston slides down, squeezing the hydrogen in the hydrogen chamber outward. When the pressure stabilizing piston body slides down to the set height, the liquid inlet piston pushes the ammonia borane reaction liquid into the reaction chamber to carry out catalytic hydrolysis to produce hydrogen. The above operations are repeated.

[0059] In some embodiments, the upper limit of the hydrogen pressure in the hydrogen chamber is set to 0.15-0.2 MPa; the lower limit is set to 0.1-0.12 MPa.

[0060] In some embodiments, there are two reaction chambers with the same specifications. The first reaction chamber is selected for reaction. When the ammonia borane reaction solution continues to catalytically hydrolyze to produce hydrogen in the reaction chamber, the gas pressure stabilizes and the piston body descends. When it descends to a set height, fresh ammonia borane reaction solution is injected into the second reaction chamber to catalytically hydrolyze to produce hydrogen. Then, the ammonia borane reaction solution in the first reaction chamber is extracted and discharged into the waste liquid storage tank, and fresh ammonia borane reaction solution is added to the inlet chamber.

[0061] The ammonia borane reaction solution is gradually consumed under the action of a catalyst, and the reaction rate decreases over time. If only a single reaction chamber is used, there will be periodic fluctuations of hydrogen production-interruption-solvent replacement-restart, which cannot meet the continuous power supply requirements of precise laboratory reactions or fuel cells. The dual reaction chambers operate alternately. When the rate of the first reaction chamber drops to the threshold, the second reaction chamber is immediately started to produce hydrogen simultaneously, which can ensure continuous hydrogen production.

[0062] When operating in alternating dual-chamber mode, the first reaction chamber can continue reacting for a period of time after the second reaction chamber starts, effectively improving the conversion rate of ammonia borane. By extending the reaction time, the effective components in the reaction solution are fully utilized, reducing the unit hydrogen production cost.

[0063] Preferably, if injecting fresh ammonia borane reaction solution into the second reaction chamber still fails to prevent the pressure stabilizing piston from continuing to descend, the machine needs to be stopped and the catalyst in the second reaction chamber replaced.

[0064] In practical applications, catalysts with high durability should be developed to reduce the frequency of catalyst replacement.

[0065] In some embodiments, when the hydrogen-using equipment has finished using hydrogen, the valve between the hydrogen storage tank and the hydrogen-using equipment is closed, and the safety valve is opened to discharge the hydrogen in the hydrogen storage tank to the outside through the vent pipe.

[0066] Preferably, the method further includes a step of introducing nitrogen into the area below the reaction chamber and the pressure stabilizing piston body to purge the hydrogen therein, and the mixture of nitrogen and hydrogen is discharged to the outside through the vent pipe.

[0067] In some embodiments, when the hydrogen sensor detects a hydrogen signal in the chamber between the pressure stabilizing piston body and the top cover, the controller controls the alarm device to sound an alarm, and at the same time controls the motor to pull the liquid inlet piston back, drawing the reaction liquid in the reaction chamber into the liquid inlet chamber. After the hydrogen in the hydrogen tank is used up or drawn into the spare hydrogen storage tank, the device is maintained.

[0068] The present invention will be further described below with reference to the embodiments.

[0069] Example like Figure 1 As shown, a catalytic hydrolysis hydrogen production device includes a reaction chamber 9 and a hydrogen storage chamber 4 that are interconnected. A catalyst is provided in the reaction chamber 9 and is connected to the liquid inlet chamber 13 of the ammonia borane reaction liquid. A liquid inlet piston 14 is provided in the liquid inlet chamber 13. The hydrogen chamber 4 is provided with an air inlet, a pressure stabilizing piston assembly and an air outlet 7 from top to bottom. The air outlet 7 is located at the bottom of the hydrogen chamber 4. A mass flow meter 6 is installed at the air outlet 7.

[0070] The pressure stabilizing piston assembly includes a pressure stabilizing piston body 2, a guide rod assembly, an upper limit stop 3, and a lower limit stop 5. The upper limit stop 3 and the lower limit stop 5 are both disposed on the inner wall of the hydrogen chamber 4 or on the guide rod assembly, and are used to limit the upper and lower limits of the sliding of the pressure stabilizing piston body 2, respectively. The main body 2 of the gas pressure stabilizing piston has a set weight, and a hydrogen pressure sensor 8 is set below it. It is installed in a sealed manner through a guide rod assembly, so that it can slide up and down the hydrogen chamber in a sealed manner.

[0071] The catalytic hydrolysis hydrogen production device of the present invention operates at constant pressure in principle, and the operating pressure in the hydrogen chamber is adjusted by adjusting the weight of the counterweight and the mass of the gas pressure stabilizing piston body.

[0072] During the catalytic hydrolysis of ammonia borane to produce hydrogen, excessive hydrogen pressure in the storage tank can significantly inhibit hydrogen production. The hydrogen chamber 4 stores the hydrogen generated by the catalytic hydrolysis. Inside the chamber is a pressure-stabilizing piston body 2. As hydrogen is produced, the hydrogen pressure in the hydrogen chamber 4 gradually increases. When the pressure increases to the point where it can overcome the weight of the pressure-stabilizing piston body 2, it can slide upwards under the pressure of the hydrogen until it reaches the upper limit stop 3. During this process, the hydrogen pressure inside the hydrogen chamber remains relatively stable and low, which is beneficial for the continuous catalytic hydrolysis of ammonia borane to produce hydrogen.

[0073] The guide rod assembly includes at least three guide rods, which are vertically arranged in a matrix, such as forming a triangle or rectangle. The pressure-stabilizing piston body 2 has through holes, the number of which corresponds to the number of guide rods, through which the guide rods pass. The pressure stabilizing piston body 2 and the guide rod, as well as the pressure stabilizing piston body 2 and the inner wall of the hydrogen chamber 4, are sealed with lubricating oil.

[0074] A first distance sensor is installed on the upper surface of the pressure-stabilizing piston body 2, and a second distance sensor is installed on the lower surface. These sensors allow for real-time measurement of the operating position of the pressure-stabilizing piston body 2. When the piston body 2 moves upward to a predetermined distance from the upper limit stop 3, the first distance sensor detects this distance signal and transmits it to the controller. The controller then controls the inlet piston to extract the ammonia-borane reaction liquid. Since the extraction process takes time, during which the reaction liquid continues to catalytically hydrolyze to produce hydrogen, the pressure-stabilizing piston body 2 may still rise to the upper limit stop 3 due to this delay effect. Extracting the reaction liquid in advance prevents excessive hydrogen pressure in the hydrogen chamber, thus ensuring safe operation.

[0075] Similarly, when the reaction liquid is drawn from the reaction chamber 9 and hydrogen is continuously supplied externally, the pressure stabilizing piston body 2 will continue to slide down. When it slides down to the set distance from the lower limit block 5, the second distance sensor collects the signal and transmits it to the controller. The controller then controls the inlet piston to re-inject the ammonia borane reaction liquid into the reaction chamber 9 for catalytic hydrolysis to produce hydrogen. Since the injection of the ammonia borane reaction liquid requires a certain amount of time, injecting it into the reaction chamber 9 before the pressure stabilizing piston body 2 slides down to the lower limit block 5 can avoid situations such as unstable hydrogen supply caused by untimely hydrogen production.

[0076] The hydrogen chamber 4 is also equipped with a top cover, with the air inlet located on the top cover. A hydrogen sensor 1 is installed on the inner wall of the top cover, and the upper end of the guide rod assembly is fixed to the inner wall of the top cover. The top cover can be completely removed or installed from the top of the hydrogen chamber, facilitating internal maintenance or lubrication to ensure airtightness. The top cover closes on the top of the hydrogen chamber 4, providing a mounting platform for the air outlet, hydrogen sensor 1, and guide rod assembly. The hydrogen sensor 1, installed on the inner wall of the top cover, can detect abnormal hydrogen concentrations in the chamber in real time (such as leaks caused by seal failure) and trigger an alarm device via the controller. The upper end of the guide rod assembly is fixed to the inner wall of the top cover, forming a vertical rigid support with the lower end (fixed to the bottom of the chamber or the lower limit block), ensuring stable gas pressure and precise axial sliding of the piston body.

[0077] To ensure the smooth up-and-down sliding of the pressure-stabilizing piston body 2, the pressure in the chamber between the top cover and the pressure-stabilizing piston body 2 should be balanced with the external pressure to prevent excessive or insufficient pressure from affecting the stable operation of the pressure-stabilizing piston body 2. The air inlet is located on the top cover and directly connects to the outside, serving to balance the pressure.

[0078] For ease of maintenance, the upper limit block 3 can be installed and removed from the inner wall of the hydrogen chamber or the guide rod assembly, and the installation and removal structure can be a conventional plug-in structure.

[0079] The bottom of the hydrogen storage chamber 4 is connected to an exhaust pipe, and a safety valve 20 is installed on the exhaust pipe. The safety valve 20 is connected to the bottom of the exhaust pipe, and the top of the exhaust pipe extends upward to connect with the outside.

[0080] In emergency situations, such as when the pressure stabilizing piston body 2 slides up and gets stuck, causing the hydrogen pressure in the hydrogen chamber 4 to exceed the threshold; or when the liquid inlet piston 14 malfunctions, causing the ammonia borane reaction liquid to fail to be extracted in time, resulting in a continuous rise in the hydrogen pressure in the hydrogen chamber 4, the safety valve 20 can be opened in an emergency to discharge the hydrogen in the hydrogen chamber 4 to a high place outdoors to avoid safety hazards.

[0081] In addition, when the hydrogen-using equipment is finished, the ammonia borane catalytic hydrogen production stops, and the external hydrogen supply also stops. At this time, the hydrogen in the hydrogen storage chamber 4 needs to be discharged through the vent pipe to further avoid safety hazards during hydrogen storage.

[0082] The side wall of the reaction chamber 9 is connected to a nitrogen source via a nitrogen blowing pipe, which is equipped with a nitrogen blowing valve 19. When the hydrogen production unit is shut down, if the unit is not used for a long time or needs to be relocated, the nitrogen blowing valve 19 is opened, and nitrogen gas is blown into the reaction chamber 9 through the nitrogen blowing pipe. The residual hydrogen gas in the reaction chamber 9 and the hydrogen storage tank 4 is discharged to the outside through the vent pipe, minimizing safety hazards.

[0083] When the hydrogen production unit is started for the first time, or restarted after being shut down following nitrogen purging, the safety valve needs to be opened to push the ammonia borane reaction liquid into the reaction chamber. The hydrogen produced after the reaction will first replace the nitrogen or air inside the unit. After the replacement is complete, the safety valve should be closed to allow the hydrogen production unit to operate normally.

[0084] The catalytic hydrolysis hydrogen production device also includes a reaction liquid storage tank 15 and a waste liquid storage tank 16. The outlet of the inlet chamber 13 is connected to the reaction chamber 9, the reaction liquid storage tank 15, and the waste liquid storage tank 16 via a four-way valve. The outlet of the inlet chamber 13 is connected to the reaction liquid storage tank 15 via an inlet pipe 17, and the outlet of the inlet chamber 13 is connected to the waste liquid storage tank 16 via a drain pipe 18. Valves are installed on the connecting pipes to facilitate the discharge of reaction waste liquid and the replacement of fresh reaction liquid.

[0085] It also includes a controller, which is connected to hydrogen sensor 1, hydrogen pressure sensor 8, and each valve. The controller is also connected to an alarm device.

[0086] The number of upper limit blocks 3 and lower limit blocks 5 is 2-10. The upper limit blocks 3 are arranged in a horizontal ring along the inner wall of the hydrogen chamber 4, and the lower limit blocks 5 are arranged in a horizontal ring along the inner wall of the hydrogen chamber 4. The position of the lower limit blocks 5 is higher than the bottom of the guide rod.

[0087] The catalyst is placed in a pull-out cage, which includes a cage with evenly distributed through holes and a sealing plate. The two are connected. A sealing ring is provided around the sealing plate to seal the reaction chamber 9, and a gripper is provided on the sealing plate.

[0088] There are two reaction chambers 9, and the number of liquid inlet chambers 13 is equal to the number of reaction chambers 9, and they are matched one by one.

[0089] The catalytic hydrolysis hydrogen production method based on the above-mentioned catalytic hydrolysis hydrogen production device includes the following steps: The ammonia borane reaction solution is injected into the reaction chamber 9. Under the catalytic action of the catalyst, the ammonia borane reaction solution hydrolyzes to produce hydrogen. The generated hydrogen enters the hydrogen chamber 4. As the reaction proceeds, the pressure stabilizing piston body 2 slides upward under the hydrogen pressure. When it reaches 1 / 5 to 2 / 3 of the height of the hydrogen chamber, the valve between the hydrogen chamber 4 and the hydrogen-using equipment is opened to supply hydrogen to the hydrogen-using equipment. During the process of simultaneous hydrogen production and supply, when the main body of the pressure stabilizing piston 2 slides upward to the set height, the liquid inlet piston 14 extracts the ammonia borane reaction liquid in the reaction chamber 9, so that the ammonia borane reaction liquid is separated from the catalyst, and the catalytic hydrolysis to produce hydrogen is stopped. At this time, the main body of the pressure stabilizing piston 2 slides down, squeezing the hydrogen in the hydrogen chamber 4 outward. When the pressure stabilizing piston body 2 slides down to the set height, the liquid inlet piston 14 pushes the ammonia borane reaction liquid into the reaction chamber 9 to carry out catalytic hydrolysis to produce hydrogen. The above operations are repeated.

[0090] The upper limit setting for hydrogen pressure in hydrogen chamber 4 is 0.15-0.2 MPa; the lower limit setting is 0.1-0.12 MPa.

[0091] There are two reaction chambers 9 with the same specifications. The first reaction chamber is selected for reaction. When the ammonia borane reaction liquid is continuously catalytically hydrolyzed to produce hydrogen in the reaction chamber, the gas pressure stabilizes and the piston body 2 descends. When it descends to the set height, fresh ammonia borane reaction liquid is injected into the second reaction chamber to catalytically hydrolyze to produce hydrogen. Then, the ammonia borane reaction solution in the first reaction chamber is extracted and discharged into the waste liquid storage tank 16, and fresh ammonia borane reaction solution is added to the liquid inlet chamber 13.

[0092] The ammonia borane reaction solution is gradually consumed under the action of a catalyst, and the reaction rate decreases over time. If only a single reaction chamber is used, there will be periodic fluctuations of hydrogen production-interruption-solvent replacement-restart, which cannot meet the continuous power supply requirements of precise laboratory reactions or fuel cells. The dual reaction chambers operate alternately. When the rate of the first reaction chamber drops to the threshold, the second reaction chamber is immediately started to produce hydrogen simultaneously, which can ensure continuous hydrogen production.

[0093] When operating in alternating dual-chamber mode, the first reaction chamber can continue reacting for a period of time after the second reaction chamber starts, effectively improving the conversion rate of ammonia borane. By extending the reaction time, the effective components in the reaction solution are fully utilized, reducing the unit hydrogen production cost.

[0094] If injecting fresh ammonia borane reaction solution into the second reaction chamber still fails to prevent the pressure stabilizing piston from continuing to descend, the machine needs to be stopped and the catalyst in the second reaction chamber replaced. The timing for replacing the catalyst in the first reaction chamber is the same as the timing for replacing the catalyst in the second reaction chamber.

[0095] In practical applications, catalysts with high durability should be developed to reduce the frequency of catalyst replacement.

[0096] After the hydrogen-using equipment has finished using the hydrogen, close the valve between the hydrogen storage chamber and the hydrogen-using equipment, and open the safety valve 20 to discharge the hydrogen in the hydrogen storage chamber 4 to the outside through the vent pipe.

[0097] It also includes the step of introducing nitrogen into the area below the reaction chamber 9 and the pressure stabilizing piston body 2 to purge the hydrogen therein, and the mixture of nitrogen and hydrogen is discharged to the outside through the vent pipe.

[0098] When the controller determines that the reaction liquid needs to be replaced, the controller controls the inlet piston 14 to draw the reaction liquid in the reaction chamber 9 to the inlet chamber 13. Then, the controller controls the main valve 10 between the inlet chamber 13 and the reaction chamber 9 to close, and controls the valve between the inlet chamber 13 and the waste liquid storage tank 16 to open. The inlet piston 14 pushes out the reaction liquid in the inlet chamber 13 and discharges it into the waste liquid storage tank 16 through the drain pipe 18.

[0099] Then, the controller closes the outlet valve 12 between the inlet chamber 13 and the waste liquid storage tank 16, and opens the inlet valve 11 between the inlet chamber 13 and the reaction liquid storage tank 15. The inlet piston 14 is pulled back to draw the fresh reaction liquid in the reaction liquid storage tank 15 into the inlet chamber 13 through the inlet pipe 17, thus completing the replacement of the reaction liquid.

[0100] When the hydrogen sensor 1 detects hydrogen gas in the chamber between the pressure stabilizing piston body 2 and the top cover, it indicates a hydrogen leak. At this time, the controller triggers the alarm and simultaneously controls the motor to pull back the inlet piston 14, drawing the reaction liquid from the reaction chamber 9 into the inlet chamber 13. This separates the reaction liquid from the catalyst, preventing further hydrogen production. The hydrogen in the hydrogen tank 4 can be used up as soon as possible, or pumped into a spare hydrogen storage tank, before performing maintenance on the device.

[0101] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A catalytic hydrolysis hydrogen production apparatus, characterized in that: It includes an interconnected reaction chamber and a hydrogen chamber. The reaction chamber contains a catalyst, which is connected to the inlet chamber of the ammonia borane reaction liquid. The inlet chamber is equipped with an inlet piston. The hydrogen chamber is provided with an air inlet, a pressure stabilizing piston assembly and an air outlet from top to bottom, with the air outlet located at the bottom of the hydrogen chamber. The pressure stabilizing piston assembly includes a pressure stabilizing piston body, a guide rod assembly, an upper limit stop, and a lower limit stop. The upper limit stop and the lower limit stop are both disposed on the inner wall of the hydrogen chamber or on the guide rod assembly, and are used to limit the upper and lower limits of the sliding of the pressure stabilizing piston body, respectively. The main body of the pressure stabilizing piston has a set weight, and a hydrogen pressure sensor is installed below it. It is installed in a sealed manner through a guide rod assembly, so that it can slide up and down the hydrogen chamber in a sealed manner. A first distance sensor is provided on the upper surface of the air pressure stabilizing piston body, and a second distance sensor is provided on the lower surface; The catalytic hydrolysis hydrogen production unit also includes a controller, which is connected to each sensor and each valve. The reaction chamber, as the core of the ammonia borane catalytic hydrolysis reaction, contains the catalyst and is connected to the liquid inlet chamber to receive the reaction liquid. The inlet chamber is used to temporarily store the ammonia borane reaction solution. The inlet piston controls the injection and extraction of the reaction solution by pushing / pulling, thereby starting and stopping the reaction. The setting of the first distance sensor and the second distance sensor can measure the running position of the pressure stabilizing piston body in real time. When the pressure stabilizing piston body moves upward and is at the set distance from the upper limit stop, the first distance sensor can detect the distance signal and transmit the signal to the controller. The controller controls the liquid inlet piston to extract the ammonia borane reaction liquid. When the reaction liquid is extracted from the reaction chamber and hydrogen is continuously supplied to the outside, the main body of the pressure stabilizing piston will continue to slide down. When it slides down to the distance set by the lower limit block, the second distance sensor collects the signal and transmits the signal to the controller. The controller controls the liquid inlet piston to re-inject the ammonia borane reaction liquid into the reaction chamber for catalytic hydrolysis to produce hydrogen.

2. The catalytic hydrolysis hydrogen production apparatus according to claim 1, characterized in that: A counterweight is provided on the main body of the pressure-stabilizing piston; The guide rod assembly includes at least three guide rods, which are vertically arranged and matrix-like. The main body of the air pressure stabilizing piston is provided with through holes, the number of which corresponds to the number of guide rods, and the guide rods are arranged through the through holes; The pressure stabilizing piston body and the guide rod, as well as the pressure stabilizing piston body and the inner wall of the hydrogen chamber, are sealed with lubricating oil.

3. The catalytic hydrolysis hydrogen production apparatus according to claim 1, characterized in that: The hydrogen chamber is also equipped with a top cover, which is sealed and closed on the top of the hydrogen chamber. The air inlet is located on the top cover, and a hydrogen sensor is installed on the inner wall of the top cover. The upper end of the guide rod assembly is fixed to the inner wall of the top cover. The catalytic hydrolysis hydrogen production device also includes a reaction liquid storage tank and a waste liquid storage tank. The outlet of the liquid inlet chamber is connected to the reaction chamber, the reaction liquid storage tank and the waste liquid storage tank respectively through a four-way valve. Valves are installed on the connecting pipes. The bottom of the hydrogen storage chamber is connected to an exhaust pipe, and a safety valve is installed on the exhaust pipe. The safety valve is connected to the bottom of the exhaust pipe, and the top of the exhaust pipe extends upward to connect with the outside. The sidewall of the reaction chamber is connected to a nitrogen source via a nitrogen blowing pipe, which is equipped with a nitrogen blowing valve. The hydrogen sensor is connected to the controller, and the controller is connected to the alarm device.

4. The catalytic hydrolysis hydrogen production apparatus according to claim 1, characterized in that: The number of upper limit blocks and lower limit blocks is 2-10. The upper limit blocks are arranged in a horizontal ring along the inner wall of the hydrogen chamber, and the lower limit blocks are arranged in a horizontal ring along the inner wall of the hydrogen chamber. The lower limit stop is positioned higher than the bottom of the guide rod.

5. The catalytic hydrolysis hydrogen production apparatus according to claim 1, characterized in that: The catalyst is placed in a pull-out cage, which includes a cage with evenly distributed through holes and a sealing plate connected together. A sealing ring is provided around the sealing plate to seal the reaction chamber, and a gripper is provided on the sealing plate.

6. The catalytic hydrolysis hydrogen production apparatus according to claim 1, characterized in that: The number of reaction chambers is at least two, and the number of liquid inlet chambers is equal to the number of reaction chambers, and they are matched one by one.

7. A method for producing hydrogen through catalytic hydrolysis, characterized in that: The catalytic hydrolysis hydrogen production apparatus according to any one of claims 1-6 includes the following steps: The ammonia borane reaction solution is injected into the reaction chamber. Under the catalytic action of the catalyst, the ammonia borane reaction solution hydrolyzes to produce hydrogen. The generated hydrogen enters the hydrogen chamber. As the reaction proceeds, the pressure stabilizing piston slides upward under the hydrogen pressure. When it reaches 1 / 5 to 2 / 3 of the height of the hydrogen chamber, the valve between the hydrogen chamber and the hydrogen-using equipment is opened to supply hydrogen to the hydrogen-using equipment. During the process of simultaneous hydrogen production and supply, when the main body of the pressure stabilizing piston slides upward to the set height, the liquid inlet piston extracts the ammonia borane reaction liquid in the reaction chamber, separates the ammonia borane reaction liquid from the catalyst, and stops the catalytic hydrolysis to produce hydrogen. At this time, the main body of the pressure stabilizing piston slides down, squeezing the hydrogen in the hydrogen chamber outward. When the pressure stabilizing piston body slides down to the set height, the liquid inlet piston pushes the ammonia borane reaction liquid into the reaction chamber to carry out catalytic hydrolysis to produce hydrogen. The above operations are repeated.

8. The method for producing hydrogen by catalytic hydrolysis according to claim 7, characterized in that: The upper limit of the hydrogen pressure in the hydrogen chamber is set at 0.15-0.2 MPa; the lower limit is set at 0.1-0.12 MPa. There are two reaction chambers with the same specifications. The first reaction chamber is selected for the reaction. When the ammonia borane reaction solution continues to catalytically hydrolyze to produce hydrogen in the reaction chamber, the gas pressure stabilizes and the piston body descends. When it descends to the set height, fresh ammonia borane reaction solution is injected into the second reaction chamber to catalytically hydrolyze to produce hydrogen. Then, the ammonia borane reaction solution in the first reaction chamber is extracted and discharged into the waste liquid storage tank, and fresh ammonia borane reaction solution is added to the inlet chamber.

9. The method for producing hydrogen by catalytic hydrolysis according to claim 8, characterized in that: If injecting fresh ammonia borane reaction solution into the second reaction chamber still fails to prevent the pressure stabilizing piston from continuing to descend, the machine needs to be stopped and the catalyst in the second reaction chamber replaced.

10. The method for producing hydrogen by catalytic hydrolysis according to claim 9, characterized in that: When the hydrogen-using equipment has finished using hydrogen, close the valve between the hydrogen storage tank and the hydrogen-using equipment, and open the safety valve to discharge the hydrogen in the hydrogen storage tank to the outside through the vent pipe. It also includes the step of introducing nitrogen into the area below the reaction chamber and the pressure stabilizing piston body to purge the hydrogen therein, and the mixture of nitrogen and hydrogen is discharged to the outside through the vent pipe; When the hydrogen sensor detects hydrogen in the chamber between the pressure stabilizing piston body and the top cover, the controller activates the alarm device and simultaneously controls the motor to pull the inlet piston back, drawing the reaction liquid from the reaction chamber into the inlet chamber. After the hydrogen in the hydrogen tank is used up or drawn into the spare hydrogen storage tank, the device is then maintained.

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