A magnesium-based hydride hydrogen storage device

Abstract

The application discloses a magnesium-based hydride hydrogen storage device, and relates to the field of hydrogen, which comprises a bottom plate, four identical supporting columns are fixedly arranged on the upper end of the bottom plate, a supporting disc is fixedly arranged on the upper end of the supporting column, a placing shell is fixedly arranged on the supporting disc, a storage device is arranged in the placing shell, a storage mechanism is arranged in the storage device, so that hydrogen can be stored, a flow pipe is fixedly arranged on the upper end of the storage device, the flow pipe is in communication with the storage device, so that hydrogen in the storage device can be discharged through the flow pipe, and the magnesium-based hydride hydrogen storage device provides a controllable temperature heat source for releasing hydrogen of the magnesium-based hydride by means of hydrogen catalytic combustion, and solves the key technical problems in the application process of the magnesium-based hydride hydrogen storage device. The placing shell is arranged outside the storage device, the storage device can be placed, heat can be saved, heat loss can be avoided, and the temperature for releasing hydrogen can be met.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of hydrogen, in particular to a magnesium-based hydride hydrogen storage device. BACKGROUND

[0002] Hydrogen storage alloy can reversibly absorb and release hydrogen under certain temperature and pressure conditions, and has excellent cycle life performance. The hydrogen storage and use can be realized by using the characteristics of hydrogen storage alloy. The reaction equation is as follows (in the formula, M represents hydrogen storage alloy, MHx represents metal hydride, and ΔH represents heat effect:

[0003] Hydrogen absorption process:

[0004] Hydrogen release process:

[0005] The representative hydrogen storage alloy mainly includes rare earth La-Ni-based, Ti-based, V-based or Mg-based hydrogen storage alloy. The Mg-based hydrogen storage alloy is widely concerned due to high hydrogen storage capacity and low cost, but the application range is greatly limited due to high hydrogen release temperature (> 250℃) of the Mg-based hydrogen storage alloy.

[0006] The metal hydride hydrogen storage device is a device specially used for storing hydrogen, which is made of hydrogen storage alloy and can reversibly absorb and release hydrogen under certain temperature and pressure conditions. The device has been commercialized in many fields such as hydrogen energy storage, hydrogen fuel cell vehicles and the like. For the hydrogen storage device filled with magnesium-based hydride, the magnesium-based hydride bed in the hydrogen storage device needs to be heated to above 250℃ to smoothly release hydrogen during the hydrogen release process. The common solution is to wrap an electric heating mechanism around the hydrogen storage device shell to release hydrogen, but for many application fields such as mobile tool application field, electric heating is not practical. In addition, electric heating also has the disadvantage of low energy utilization efficiency. In view of the above problems, the present application provides a controllable temperature heat source for the release of hydrogen gas of magnesium-based hydride by using hydrogen catalytic combustion, which solves the key technical problem in the application process of magnesium-based hydride hydrogen storage device. SUMMARY

[0007] The present application aims to provide a magnesium-based hydride hydrogen storage device to solve the problems in the background art.

[0008] In order to achieve the above object, the application provides the following technical scheme: a magnesium-based hydride hydrogen storage device, comprising a bottom plate, four identical support columns are fixedly arranged on the upper end of the bottom plate, a support disc is fixedly arranged on the upper end of the support column, a placing shell is fixedly arranged on the support disc, a storage device is arranged in the placing shell, a storage mechanism is arranged in the storage device, so that hydrogen can be stored, a flow pipe is fixedly arranged on the upper end of the storage device, the flow pipe is in communication with the storage device, so that the hydrogen in the storage device can be discharged through the flow pipe, a triggering mechanism is connected to the flow pipe, the other end of the triggering mechanism extends into the bottom end of the storage device, so that part of the hydrogen discharged from the flow pipe can return to the storage device, thereby achieving the release condition of the hydrogen in the storage device, and the hydrogen in the storage device can be discharged.

[0009] Preferably, the triggering mechanism comprises a gas distribution pipe, one end of the gas distribution pipe is in the storage device, the other end of the gas distribution pipe is outside the left side of the storage device, a gas mixer is connected to the left end of the gas distribution pipe, an air pipe is connected to the left end of the gas mixer, and a right-angle pipe is connected between the flow pipe and the gas mixer.

[0010] Preferably, the air pipe is respectively provided with a second pump and a second flow controller, so that the air outside can be adsorbed under the action of the second pump, and the air can quantitatively enter the gas mixer under the control of the second flow controller, the gas distribution pipe is provided with a first control valve, the right-angle pipe is provided with a first pump and a first flow controller, so that the hydrogen in the flow pipe can quantitatively enter the gas mixer, and then mix with the entering air, and then enter the storage device under the action of the first control valve.

[0011] Preferably, the storage mechanism comprises four identical reaction pipes fixed on the gas distribution pipe, the reaction pipes are in communication with the gas distribution pipe, a reaction exhaust pipe is fixedly arranged on the upper end of the reaction pipe, the reaction exhaust pipe is in communication with the reaction pipe, and the reaction exhaust pipe is provided with a second control valve.

[0012] Preferably, the reaction pipe is provided with a catalytic combustion catalyst, the catalytic combustion catalyst is a substrate SiC or Al2O3 or TiO2, and is loaded with Pd or Pt or AgO, one or a combination of several, so that the gas entering the gas distribution pipe can react with it, thereby releasing heat and making its temperature reach a temperature sensor-℃, thereby achieving the release condition of the hydrogen in the storage device.

[0013] Preferably, each of the reaction tubes is fixedly provided with fins, which are wrapped around the reaction tubes so that when the reaction tubes release heat, it can be transferred through the fins. A temperature sensor is fixedly provided on the inner wall of the memory so that the temperature inside the memory can be detected.

[0014] Preferably, the storage mechanism further includes a hydrogen storage alloy material placed inside the memory. The hydrogen storage alloy material is a Mg-based hydride, which can release hydrogen gas under certain temperature and pressure. A gas filter rod is also fixed inside the memory to filter the released hydrogen gas, which is then discharged through the flow pipe.

[0015] Preferably, the upper left and right sides of the placement shell are provided with square grooves to facilitate the installation and removal of the memory. The left side of the placement shell is provided with a rectangular groove, which is connected to the square groove and both penetrate through the inner and outer ends of the placement shell.

[0016] Preferably, the housing has an insulation layer to prevent heat loss from the memory and thus facilitate the release of hydrogen.

[0017] In summary, the beneficial effects of this invention are:

[0018] 1. This invention solves a key technical problem in the application of magnesium-based hydride hydrogen storage devices by providing a controllable temperature heat source for the hydrogen released from magnesium-based hydrides through hydrogen catalytic combustion.

[0019] 2. By setting a casing around the memory, the present invention can store the memory while retaining heat and preventing heat loss, thereby meeting the temperature requirements for releasing hydrogen. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the 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 of the invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a magnesium-based hydride hydrogen storage device according to the present invention;

[0022] Figure 2 For the present invention Figure 1 Schematic diagram of the cross-sectional view at point AA;

[0023] Figure 3 For the present invention Figure 2 Enlarged cross-sectional view of section B in the middle;

[0024] Figure 4 Temperature and time change graph of the combustion catalyst of the present invention, which is a 1wt% Pd catalyst supported on a SiC carrier.

[0025] Figure 5 Temperature and time change graph of the combustion catalyst of the present invention, which is a 1wt% Pt catalyst supported on an Al2O3 carrier.

[0026] The reference numerals in the drawings are described as follows: 11, base plate; 12, support column; 13, support disk; 14, placement case; 15, square groove; 16, rectangular groove; 17, memory; 18, flow-through tube; 19, right-angle tube; 20, air tube; 21, gas mixer; 22, hydrogen storage alloy material; 23, reaction tube; 24, fin; 25, temperature sensor; 26, gas distribution tube; 27, reaction exhaust tube; 28, first pump; 29, first flow controller; 30, second pump; 31, second flow controller; 32, first control valve; 33, gas filter stick; 34, second control valve. DETAILED DESCRIPTION

[0027] All of the features disclosed in this specification, and / or all of the steps of any methods disclosed, can be combined in any combination, except where features or steps are mutually exclusive (that is, where a feature or step of a kind cannot be substantially combined with a feature or step of a different kind).

[0028] Any feature disclosed in this specification, unless stated otherwise, can be replaced by any other feature serving the same, or a similar, purpose.

[0029] The application will now be described in detail by way of specific examples. Figures 1-3 The application will now be described in detail by way of specific examples, in which the following terms are defined as follows: the up-down, left-right, front-rear directions in the following description are the same as the up-down, left-right, front-rear directions of the device of the present invention, Figure 1 the front-rear, left-right, up-down directions in the view direction are the same as the front-rear, left-right, up-down directions of the device of the present invention, Figure 1 the front-rear, left-right, up-down directions in the view direction are the same as the front-rear, left-right, up-down directions of the device of the present invention, Figure 1 the front-rear, left-right, up-down directions in the view direction are the same as the front-rear, left-right, up-down directions of the device of the present invention.

[0030] Reference will now be made to Figures 1-3The application provides a magnesium-based hydrogen storage device, which comprises a bottom plate 11, four same supporting columns 12 are arranged on the upper end of the bottom plate 11, a supporting disc 13 is arranged on the upper end of the supporting column 12, a placing shell 14 is arranged on the supporting disc 13, the placing shell 14 can be arranged vertically or horizontally, a storage device 17 is arranged in the placing shell 14, a storage mechanism is arranged in the storage device 17, so that hydrogen can be stored, a flow pipe 18 is fixedly arranged on the upper end of the storage device 17, the flow pipe 18 is in communication with the storage device 17, so that the hydrogen in the storage device 17 can be discharged through the flow pipe 18, a triggering mechanism is connected to the flow pipe 18, the other end of the triggering mechanism extends into the bottom end of the storage device 17, so that part of the hydrogen discharged from the flow pipe 18 can return to the storage device 17, and then the release condition of the hydrogen in the storage device 17 is achieved, so that the hydrogen in the storage device 17 can be discharged.

[0031] In addition, in an embodiment, the triggering mechanism comprises a gas distribution pipe 26, one end of the gas distribution pipe 26 is arranged in the storage device 17, the other end of the gas distribution pipe 26 is arranged outside the left side of the storage device 17, a gas mixer 21 is connected to the left end of the gas distribution pipe 26, an air pipe 20 is connected to the left end of the gas mixer 21, and a right-angle pipe 19 is connected between the flow pipe 18 and the gas mixer 21.

[0032] In addition, in an embodiment, the air pipe 20 is respectively provided with a second pump 30 and a second flow controller 31, so that the air outside can be adsorbed under the action of the second pump 30, and the air can quantitatively enter the gas mixer 21 under the control of the second flow controller 31; the gas distribution pipe 26 is provided with a first control valve 32; the right-angle pipe 19 is provided with a first pump 28 and a first flow controller 29, so that the hydrogen in the flow pipe 18 can quantitatively enter the gas mixer 21, and then the hydrogen is mixed with the entering air, and then the hydrogen enters the storage device 17 under the action of the first control valve 32.

[0033] In addition, in an embodiment, the storage mechanism comprises four same reaction pipes 23 fixed on the gas distribution pipe 26, the reaction pipes 23 are in communication with the gas distribution pipe 26, a reaction exhaust pipe 27 is fixedly arranged on the upper end of the reaction pipe 23, the reaction exhaust pipe 27 is in communication with the reaction pipe 23, and the reaction exhaust pipe 27 is provided with a second control valve 34.

[0034] In addition, in one embodiment, the reaction tube 23 is provided with a catalytic combustion catalyst, which is a substrate SiC or A1203 or TiO2, loaded with Pd or Pt or AgO, one or several combinations, so that the gas entering the gas distribution pipe 26 can react with it to release heat, so that its temperature reaches 250-350℃, and then reaches the hydrogen release condition in the storage 17.

[0035] In addition, in one embodiment, each reaction tube 23 is provided with a fin 24 fixed thereon, which surrounds the reaction tube 23, so that when the reaction tube 23 releases heat, it can be transferred through the fin 24, and a temperature sensor 25 is fixed on the inner wall of the storage 17, so that the temperature in the storage 17 can be detected.

[0036] In addition, in one embodiment, the storage mechanism further comprises a hydrogen storage alloy material 22 placed in the storage 17, which is a Mg-based hydride, which can release hydrogen gas at a certain temperature and pressure, and a gas filter rod 33 is also fixed in the storage 17, so that the released hydrogen gas can be filtered and discharged through the flow pipe 18.

[0037] In addition, in one embodiment, the placing shell 14 is provided with a square slot 15 on the left and right sides of the upper end, so that the storage 17 can be easily installed and taken out, and a rectangular slot 16 is provided on the left side of the placing shell 14, which communicates with the square slot 15 and penetrates through the inner and outer ends of the placing shell 14.

[0038] In addition, in one embodiment, the placing shell 14 is provided with a heat preservation layer, so that the heat in the storage 17 can be prevented from being lost, and the release of hydrogen gas can be completed.

[0039] In addition, in one embodiment, when the catalytic combustion catalyst is a 1wt% Pd catalyst supported on a SiC carrier, the fuel-air ratio is 1:20, and a temperature of 280℃ is obtained.

[0040] When the catalytic combustion catalyst is a 1wt% Pt catalyst supported on an A1203 carrier, the fuel-air ratio is 1:10, and a temperature of 320℃ is obtained.

[0041] In the initial state, the gas mixer 21 stores a certain proportion of mixed gas of air and hydrogen.

[0042] When the hydrogen is released, the first control valve 32 is opened, so that the mixed gas in the gas mixer 21 enters into the gas distribution pipe 26, and then enters into the reaction tube 23, and then reacts with the catalytic combustion catalyst in the reaction tube 23, and then generates heat, which is evenly distributed in the storage 17 by the fins 24, and the gas produced by the reaction is discharged through the reaction exhaust pipe 27, when the heat generated by the reaction is transferred to the hydrogen storage alloy material 22, the temperature of the hydrogen storage alloy material 22 is reached, so that the hydrogen storage alloy material 22 can release hydrogen, so that the hydrogen is filtered under the action of the gas filter stick 33, and then discharged through the flow pipe 18, and part of the hydrogen can enter into the straight pipe 19 under the action of the first pump 28, and then enter into the gas mixer 21, the second pump 30 is started, so that the external air enters into the gas mixer 21, under the action of the first flow controller 29 and the second flow controller 31, the proportion of air and hydrogen is controlled respectively, and then it is entered into the gas distribution pipe 26 again, so that the heat in the reaction tube 23 is continuously generated, and then the release of hydrogen is completed.

[0043] When the hydrogen is stored, the storage 17 is separated from the placing shell 14, so that the placing shell 14 is placed in water, and then the heat released by the stored hydrogen is absorbed by the water, and then the storage of hydrogen is completed.

[0044] The above is only a specific embodiment of the application, but the protection scope of the application is not limited thereto, any change or replacement without creative labor should be covered in the protection scope of the application. Therefore, the protection scope of the application should be limited by the protection scope defined in the claims.

Claims

1. A magnesium-based hydride hydrogen storage device comprising a base plate (11), characterised in that: The bottom plate (11) is provided with four identical support columns (12) at the upper end, the support columns (12) are provided with support discs (13) at the upper end, the support discs (13) are provided with placing shells (14) at the upper end, the placing shells (14) are provided with storage devices (17) inside, the storage devices (17) are provided with storage mechanisms, the storage devices (17) are provided with flow pipes (18) at the upper end, the flow pipes (18) are communicated with the storage devices (17), the flow pipes (18) are provided with trigger mechanisms, the other ends of the trigger mechanisms extend into the bottom end of the storage devices (17), the trigger mechanisms comprise gas distribution pipes (26), one end of the gas distribution pipes (26) is in the storage devices (17), the other end of the gas distribution pipes (26) is outside the left side of the storage devices (17), the left end of the gas distribution pipes (26) is provided with gas mixers (21), the left end of the gas mixers (21) is provided with air pipes (20), the flow pipes (18) and the gas mixers (21) are provided with straight pipes (19), so that part of the hydrogen gas discharged from the flow pipes (18) can return to the storage devices (17), so as to achieve the release condition of the hydrogen gas in the storage devices (17), and the hydrogen gas in the storage devices (17) is discharged.

2. A magnesium-based hydride hydrogen storage device according to claim 1, wherein: The air pipes (20) are respectively provided with second pumps (30) and second flow controllers (31), the gas distribution pipes (26) are provided with first control valves (32), and the straight pipes (19) are provided with first pumps (28) and first flow controllers (29).

3. A magnesium-based hydride hydrogen storage material according to claim 1, wherein: The storage mechanism comprises four identical reaction tubes (23) fixed on the gas distribution pipes (26), the reaction tubes (23) are communicated with the gas distribution pipes (26), the upper end of the reaction tubes (23) is provided with reaction exhaust pipes (27), the reaction exhaust pipes (27) are communicated with the reaction tubes (23), and the reaction exhaust pipes (27) are provided with second control valves (34).

4. A magnesium-based hydride hydrogen storage device according to claim 3, wherein: The reaction tube (23) is provided with a catalytic combustion catalyst, which is SiC or Al (2) O (3) or TiO (2) , loaded with Pd or Pt or AgO, one or several combinations.

5. A magnesium-based hydride hydrogen storage material according to claim 3, wherein: The reaction tubes (23) are respectively provided with fins (24) at the upper end, the fins (24) surround the reaction tubes (23), and temperature sensors (25) are fixed on the inner walls of the storage devices (17).

6. A magnesium-based hydride hydrogen storage material according to claim 1, wherein: The storage mechanism further comprises hydrogen storage alloy materials (22) placed in the storage devices (17), the hydrogen storage alloy materials (22) are Mg-based hydrides, and the hydrogen storage alloy materials (22) release hydrogen gas under certain temperature and pressure, and the storage devices (17) are further provided with gas filter rods (33) fixed therein, which filter the released hydrogen gas.

7. The magnesium-based hydride hydrogen storage material of claim 1, wherein: The placing shells (14) are provided with square grooves (15) at the upper end and on the left and right sides, the placing shells (14) are provided with rectangular grooves (16) on the left side, the rectangular grooves (16) are communicated with the square grooves (15), and the square grooves (15) and the rectangular grooves (16) penetrate through the inner and outer ends of the placing shells (14).

8. The magnesium-based hydride hydrogen storage device of claim 1, wherein: The placing shells (14) are provided with heat preservation layers to prevent heat loss of the storage devices (17).

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