CN109027660B - Supercritical hydrogen storage method and application thereof - Google Patents

Supercritical hydrogen storage method and application thereof Download PDF

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Publication number
CN109027660B
CN109027660B CN201811097934.6A CN201811097934A CN109027660B CN 109027660 B CN109027660 B CN 109027660B CN 201811097934 A CN201811097934 A CN 201811097934A CN 109027660 B CN109027660 B CN 109027660B
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hydrogen
supercritical
storage
pressure
storage tank
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CN109027660A (en
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吕翠
伍继浩
周远
李青
龚领会
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Beijing Zhongke Fu Hai Low Temperature Technology Co.,Ltd.
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Technical Institute of Physics and Chemistry of CAS
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  • General Engineering & Computer Science (AREA)
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  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

A storage method of supercritical hydrogen comprises the steps of cooling hydrogen meeting pressure and purity to obtain supercritical hydrogen, and inputting the supercritical hydrogen into a supercritical storage tank for storage, wherein the storage state of the supercritical hydrogen is that the temperature is higher than 33.145K, and the pressure is higher than 1.2964 MPa. The storage method of the supercritical hydrogen can ensure the hydrogen storage density, does not consider the problem of heat conversion of the para-hydrogen in the cooling process of preparing the supercritical hydrogen, saves energy, and does not have the problem of gas release required by liquid evaporation in the use process. In addition, the invention also provides application of the supercritical hydrogen.

Description

Supercritical hydrogen storage method and application thereof
Technical Field
The invention relates to the technical field of hydrogen energy storage, in particular to a storage method of supercritical hydrogen and application of the supercritical hydrogen.
Background
Hydrogen energy is a clean secondary energy, and has the advantages of high combustion heat value, no pollution, rich reserves and the like. The hydrogen energy is mainly applied to the petrochemical industry and electronics industry, the aerospace industry, the fuel cell industry and the like. The large-scale application of the hydrogen energy plays an important role in restraining global temperature rise, adjusting energy mechanisms in China, and relieving the problems of high external dependence of energy in China and the like. However, the density of hydrogen is small, the relative molecular weight is 2, and in hydrogen energy utilization, the storage and transportation technology of hydrogen is a bottleneck technology in the industry at present.
At present, the storage and transportation of hydrogen energy mainly adopt the form of high-pressure hydrogen storage and transportation or liquid hydrogen storage and transportation.
High pressure hydrogen storage and transportation is the storage of hydrogen by compression, for example to the usual pressures of 35Mpa or 70 Mpa. Aiming at the 35Mpa gas hydrogen storage tank commonly adopted in China at present, the storage density is about 23kg/m3Even if the storage tank of 70MPa can be applied in large scale in the future, the storage density of the high-pressure gas hydrogen is only 39kg/m3. If the storage pressure is increased, the required compression strength of the tank will increase. The storage density of hydrogen can be improved to a certain extent through high-pressure hydrogen storage and transportation, but higher requirements are provided on the aspects of pressure bearing, wall thickness and the like of the storage tank. The high pressure is caused by the restriction of high bearing pressure, large wall thickness of the storage tank and the likeThe mass hydrogen storage ratio of the gas hydrogen storage tank is relatively small.
The liquid hydrogen storage is to cool the hydrogen gas to about 20K of the condensation point temperature through a certain refrigeration mode, thereby achieving the purpose of hydrogen gas liquefaction. The storage density of the liquid hydrogen can reach 70kg/m3The storage density is high, but the liquid hydrogen has the evaporation phenomenon that liquid is changed into gas in the transportation or use process. At present, the daily evaporation rate of the liquid hydrogen storage tank is about 0.5% -1%, on one hand, the evaporation of the liquid hydrogen causes the waste of hydrogen energy, on the other hand, the evaporated gas causes the gas pressure in the tank to be increased, and the gas must be discharged. Hydrogen in nature consists of 75% orthohydrogen and 25% parahydrogen, the equilibrium concentration of orthohydrogen and parahydrogen changes with decreasing temperature, and the process of converting orthohydrogen into parahydrogen is an exothermic reaction. Therefore, in order to preserve the liquid hydrogen for a long time, the heat of the positive-secondary conversion is prevented from evaporating the partially liquefied hydrogen gas, and the cold energy is prevented from being wasted. In the process of temperature reduction, a catalyst is required to be arranged, the conversion speed of the para-hydrogen is increased, and the partial conversion heat is taken away by a refrigerator. Research has shown that the heat of conversion of para-hydrogen consumes about 20% of the liquefaction work, thus increasing the process power consumption and cost of liquefying hydrogen gas.
Disclosure of Invention
In view of the above, there is a need for a method of storing supercritical hydrogen with high storage density and low energy consumption, and without need of gas release during use, and application of the supercritical hydrogen.
A storage method of supercritical hydrogen comprises the steps of cooling hydrogen meeting pressure and purity to obtain supercritical hydrogen, and inputting the supercritical hydrogen into a supercritical storage tank for storage, wherein the storage state of the supercritical hydrogen is that the temperature is higher than 33.145K, and the pressure is higher than 1.2964 MPa.
In addition, the application of the supercritical hydrogen in the fuel cell is also provided, wherein the supercritical hydrogen stored in the supercritical storage tank is used as a hydrogen source, and the storage state of the supercritical hydrogen in the supercritical storage tank is that the temperature is more than 33.145K and the pressure is more than 1.2964 MPa.
In addition, the application of the supercritical hydrogen in the hydrogenation station is also provided, wherein the supercritical hydrogen stored in the supercritical storage tank is used as a hydrogen source, and the storage state of the supercritical hydrogen in the supercritical storage tank is that the temperature is more than 33.145K and the pressure is more than 1.2964 MPa.
In addition, the application of the supercritical hydrogen as a chemical raw material is also provided, wherein the storage state of the supercritical hydrogen is that the temperature is more than 33.145K, and the pressure is more than 1.2964 MPa.
In addition, the application of the supercritical hydrogen as a chemical raw material in hydrogenation reaction in the processes of producing synthetic ammonia, methanol and petroleum refining is also provided, wherein the storage state of the supercritical hydrogen is that the temperature is more than 33.145K, and the pressure is more than 1.2964 MPa.
In addition, the application of the supercritical hydrogen as a chemical raw material in the industries of electronics, metallurgy, food processing, float glass, fine chemical synthesis, aerospace industry and semiconductors is further provided, wherein the storage state of the supercritical hydrogen is that the temperature is more than 33.145K, and the pressure is more than 1.2964 MPa.
In addition, the application of the supercritical hydrogen as fuel in a power system is also provided, wherein the storage state of the supercritical hydrogen is that the temperature is greater than 33.145K, and the pressure is greater than 1.2964 MPa.
The storage method of the supercritical hydrogen can ensure the hydrogen storage density, does not consider the problem of heat conversion of the para-hydrogen in the cooling process of preparing the supercritical hydrogen, saves energy, and does not have the problem of gas release required by liquid evaporation in the use process.
Drawings
FIG. 1 is a schematic flow diagram of a method for supercritical hydrogen storage according to one embodiment;
FIG. 2 is a schematic view of a supercritical hydrogen cooling process according to one embodiment;
FIG. 3 is a schematic diagram of a supercritical hydrogen storage tank according to an embodiment;
FIG. 4 is a schematic diagram of a liquid hydrogen production process according to one embodiment;
FIG. 5 is a schematic view of another embodiment of a supercritical hydrogen production process;
FIG. 6 is a schematic diagram of the use of supercritical hydrogen in a fuel cell;
FIG. 7 is a schematic diagram of the use of supercritical hydrogen in a hydrogen station;
FIG. 8 is a schematic illustration of the use of supercritical hydrogen as a chemical feedstock;
FIG. 9 is a schematic illustration of the use of supercritical hydrogen as a fuel in a power system.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The supercritical hydrogen storage method comprises the steps of cooling hydrogen meeting pressure and purity to obtain supercritical hydrogen, and inputting the supercritical hydrogen into a supercritical storage tank for storage, wherein the supercritical hydrogen is stored at a temperature higher than 33.145K and at a pressure higher than 1.2964 MPa.
The storage method of the supercritical hydrogen can ensure the hydrogen storage density, does not consider the problem of heat conversion of the para-hydrogen in the cooling process of preparing the supercritical hydrogen, saves energy, and does not have the problem of gas release required by liquid evaporation in the use process.
Referring to fig. 1, the method for preparing supercritical hydrogen specifically includes the following steps:
firstly, judging whether the pressure of incoming flow hydrogen reaches the preset value of a cooling system, if not, firstly compressing the incoming flow hydrogen to the required pressure through a hydrogen compressor; if so, judging whether the purity of the hydrogen reaches the preset value of the cooling system, and if not, further improving the purity of the hydrogen through the purification system 2. If so, the hydrogen enters the hydrogen cooling system 3, the temperature of the hydrogen is reduced, and the hydrogen becomes supercritical hydrogen. Then, the supercritical hydrogen is stored in the supercritical hydrogen storage tank.
In addition, the supercritical hydrogen stored in the supercritical storage tank can be transported to the user 5 for use.
The cooling scheme for supercritical hydrogen is shown in figure 2:
the design of the hydrogen cooling system can be composed of a liquid nitrogen precooling part, mixed working medium precooling, multistage turbine expansion precooling and the like, and the pressure level of the cooling system can be single-stage or multistage. The cooling system for supercritical hydrogen is illustrated in fig. 2 above, where the inside of the black box represents the hydrogen cooling system. H1-H6, hydrogen gas flow, SH7 supercritical hydrogen. The figure shows liquid nitrogen LN precooling, the temperature of hydrogen is reduced to about 80K through a liquid nitrogen precooling stage, then the hydrogen enters a turbine expansion precooling stage, the upper figure shows two stages of turbines E1-E2 for expansion precooling, and the later dotted line part shows that the selection and matching of the refrigeration stages (including the number of turbines, the combination form, other forms of refrigeration modes and the like) are carried out according to the preparation quantity of an actual system, and finally the temperature of the hydrogen is cooled to be higher than 33.145K, so that the supercritical state of the hydrogen is ensured.
This is explained with reference to fig. 3. The supercritical hydrogen storage tank mainly comprises an outer tank 1, an inner tank 5 and a fiber reinforced epoxy resin matrix composite material layer 4 wrapped outside the inner tank 5. A vacuum cavity is arranged between the inner tank 5 and the outer tank 1, and in order to ensure the low-temperature performance of the supercritical storage tank, a solid heat-insulating material 3 and a vacuum multi-layer heat-insulating layer 2 are filled in the vacuum cavity. The supercritical hydrogen storage tank is provided with a vacuum layer extraction opening 7 and a vacuum meter 8. In addition, the supercritical hydrogen storage tank is also provided with a filling interface 6, and an inner pipeline of the supercritical hydrogen storage tank is deep into the bottom of the supercritical hydrogen storage tank. The supercritical hydrogen storage tank is also provided with a safety discharge device 9 which mainly comprises a pressure gauge 9-2, a safety valve 9-1, one for one of the two safety valves, a valve 9-4 and a valve 9-3.
In this example, the storage tank inner tank 5 is used for storing high-pressure supercritical hydrogen, has a pressure-bearing capacity of more than 20MPa, and can employ an aluminum inner tank. In order to enhance the strength of the inner tank 5, the outer part of the inner tank 5 is wrapped with a fiber reinforced epoxy resin based composite material layer 4, which may be carbon fiber or glass fiber. The heat insulating material 3 may be a micro bead heat insulating material or polyurethane foam, and reduces heat conduction between the fluid in the inner tank 5 and the outside. The vacuum multilayer heat insulation layer 2 wraps the whole storage tank by adopting aluminum foil, and the main purpose is to prevent the radiation heat exchange between the internal low-temperature fluid and the external environment, wherein the number of aluminum foil layers, the wrapping density and the like are determined by specific heat transfer calculation.
In order to ensure that the vacuum layer has good vacuum degree, a vacuum pumping hole 7 is formed in the vacuum interlayer, the vacuum degree of the vacuum interlayer meets the requirement by connecting an external vacuum pump, and meanwhile, the vacuum degree of the vacuum interlayer is monitored by arranging a vacuum gauge 8.
Fill notes pipeline 6, through outer courage 1, multilayer vacuum heat insulation layer 2, heat-insulating material 3, fibre reinforced epoxy resin based composite material layer 4 and inner tank 5 reach inside supercritical fluid bottom in proper order, carry out the filling of liquid.
Because the supercritical storage tank stores the cryogenic fluid, aiming at the problem of pressure rise of the tank body caused by heat leakage, the invention is also provided with an overpressure relief system 9 which is provided with a pressure gauge 9-2 for monitoring the fluid pressure in the inner tank 5 in real time, and when the pressure exceeds the set pressure, the interlocking safety valve 9-1 is used for pressure relief. To ensure safety. The safety valve 9-1 is one-use one-standby, and the normally open valves 9-3 and 9-4 are arranged at the upstream of the pressure gauge 9-2 and the safety valve 9-1 to ensure the convenience of maintenance.
The following illustrates the advantages of supercritical hydrogen storage and transportation over conventional hydrogen energy storage and transportation for specific embodiments in conjunction with supercritical hydrogen cooling and supercritical hydrogen storage. The system power consumption of liquid hydrogen and supercritical hydrogen is compared under the condition of the same yield and the same fluid density, and the purity of the incoming hydrogen can meet the requirement of the system on the purity. In this embodiment, for convenience of comparison, in the supercritical hydrogen production process, the storage temperature of the supercritical hydrogen is assumed to be 34K, the storage pressure is assumed to be 11MPa, and the corresponding storage density is 70.194kg/m3The storage density of saturated liquid hydrogen at approximately 1.3bar was 69.81kg/m3。
FIG. 4 is a schematic diagram of a liquid hydrogen production process. Here we use liquid nitrogen pre-cooling and two stage turbo-expansion pre-cooling to produce liquid hydrogen. The circulating power of the cooling circulation comes from two-stage compressors C-100 and C-200. The incoming flow hydrogen H1, the temperature is about 300K, the pressure is 2MPa, the parahydrogen concentration is 25 percent, the temperature of the low-temperature hydrogen H is reduced after passing through a liquid nitrogen precooling stage2About 80K, H2After passing through an isothermal ortho-para hydrogen converter O-P1, H3The para-hydrogen concentration becomes 40% and the exothermic heat of conversion is carried away by the liquid nitrogen. Posterior menstruationThe liquid hydrogen is gradually cooled and continuously converted into O-P2-O-P6 by heat exchangers HEX 2-HEX 7, and finally is depressurized by a throttle valve CV1 to generate liquid hydrogen H8, wherein the temperature is 21K, the pressure is 1.3bar, and the concentration of secondary hydrogen is more than 98%. The specific power consumption of the process for producing liquid hydrogen is about 17.6 kW/kg.
Fig. 5 is a schematic view of a supercritical hydrogen production process. Liquid hydrogen is also produced here in the form of a liquid nitrogen precool LN and an expansion precooling of two stages of turbines E1, E2. The same incoming flow hydrogen property is adopted, the temperature is about 300K, the pressure is 2MPa, the temperature of H1 after compression by a compressor is 300K, the pressure is 20MPa, in the production process of the supercritical hydrogen, the temperature of the hydrogen H2-H6 is gradually reduced through precooling processes of all stages without considering the conversion of the normal-secondary hydrogen, and the temperature of an outlet SH7 is 34K and 11 MPa. In this process, it is found that, since the production process does not take into account the ortho-para hydrogen conversion, an isothermal ortho-para hydrogen conversion device is not required, and a continuous ortho-para hydrogen conversion device is subsequently arranged in the heat exchanger, so that the equipment is reduced, the manufacturing process is simpler, and the possibility of system pollution is reduced. And a throttle valve is not needed in the cooling process, so that the irreversible power loss is reduced. In addition, the lowest temperature of the system is increased from the original liquid hydrogen temperature of 21K to the current temperature of 34K, the Carnot efficiency is improved, and the power consumption of the system is reduced. Through practical data analysis, the specific power consumption of the process for producing the supercritical hydrogen is about 10kW/kg, which is reduced by 42% compared with liquid hydrogen.
The storage method of the supercritical hydrogen is a new hydrogen energy storage and transportation mode, and the temperature of the hydrogen with certain pressure is reduced to be more than 33.145K through a certain refrigeration mode. The hydrogen gas is stored in a supercritical state by a supercritical hydrogen storage tank. The supercritical state is a state in which the fluid is at a temperature higher than the critical pressure and the critical temperature. For hydrogen, the critical temperature is 33.145K and the critical pressure is 1.315 MPa. Pressurizing the hydrogen gas to 11MPa, so that the density of the supercritical hydrogen can reach 70kg/m3I.e. the storage density of liquid hydrogen. The higher the pressure, the higher the storage density, and the specific storage pressure of supercritical hydrogen is selected according to actual needs.
The storage method of the supercritical hydrogen has the following beneficial effects:
1. compared with the conventionalCompared with the high-pressure hydrogen storage, the storage density of the high-pressure hydrogen is 23kg/m3 under the storage pressure of 35MPa, and the storage density of the high-pressure hydrogen is 39kg/m under the storage pressure of 70MPa3(ii) a The liquid hydrogen is stored in a liquid hydrogen storage tank, and the storage density of the liquid hydrogen storage tank is 71.29kg/m under the conditions of 1bar and 20K3(ii) a The storage density of the supercritical hydrogen is 70.194kg/m at 11MPa and 34K by adopting supercritical hydrogen storage3The storage density of supercritical hydrogen at 20MPa and 34K is 77.37kg/m3. From the data, compared with liquid hydrogen storage and transportation, the efficiency of the whole system is higher by adopting the supercritical hydrogen storage and transportation temperature higher than that of the liquid hydrogen; compared with high-pressure gas hydrogen storage tank storage, the high-pressure gas hydrogen storage tank can reach very high storage density under the condition of lower storage pressure, and the energy utilization efficiency is improved.
2. Because the supercritical hydrogen is stored in the supercritical hydrogen storage tank, the problem of liquid evaporation does not exist, the supercritical hydrogen storage tank can be conveniently used for vehicle-mounted equipment, and the popularization and the application of hydrogen energy sources are facilitated.
3. The supercritical hydrogen storage density is high, the single transportation volume is large, the transportation frequency in the hydrogen energy utilization process can be reduced, the supercritical hydrogen storage system can be used as a vehicle-mounted energy storage element, and the endurance mileage of a vehicle can be improved.
4. The production of liquid hydrogen requires the conversion of ortho-hydrogen to para-hydrogen, which gives off heat of conversion during the conversion process, resulting in a decrease in overall efficiency. In the supercritical hydrogen preparation process, the normal-para hydrogen conversion process is not contained, the refrigerating capacity required in the whole process is reduced, and the refrigerating efficiency is improved.
5. The power consumption in the supercritical hydrogen preparation process is reduced, the cost is reduced, and the hydrogen energy price of an end user is more economic.
6. Compared with a liquid hydrogen storage tank, the supercritical hydrogen storage tank has the advantages of high storage temperature, less heat dissipation and easy storage; compared with a high-pressure gas hydrogen storage tank, the storage pressure is low, and the high-pressure gas hydrogen storage tank is more economical and safer in large-scale use.
7. The liquid hydrogen storage and transportation mode needs to be periodically deflated during storage and use. In comparison, the supercritical hydrogen storage and transportation has the advantages that the conversion of the normal-secondary hydrogen is not needed in the preparation process, the power consumption of the whole system is low, and the problem of periodic gas release does not exist because the system is in a supercritical state. Therefore, the supercritical hydrogen storage tank is adopted for hydrogen resource storage, which has great advantages.
The following are applications of supercritical hydrogen in various fields.
The application of the supercritical hydrogen in the fuel cell is disclosed, wherein the supercritical hydrogen stored in the supercritical storage tank is used as a hydrogen source, the storage state of the supercritical hydrogen in the supercritical storage tank is that the temperature is higher than 33.145K, and the pressure is higher than 1.2964 MPa.
Specifically, the fuel cell using supercritical hydrogen can be used in vehicle-mounted systems, household fuel systems, small and medium-scale power stations, communication systems, space shuttles, submarines and other places requiring power supplies.
Reference is made to fig. 6 for the application of supercritical hydrogen in a fuel cell. The supercritical hydrogen storage tank is conveyed to a hydrogen fuel cell system through a valve and a cold energy recovery device. Through the valve control hydrogen production on-off and the function of controlling the inlet pressure of the fuel cell, because the supercritical hydrogen belongs to low-temperature hydrogen, the cold energy of the supercritical hydrogen is recycled at first, the energy waste is prevented, and the inlet temperature and the inlet pressure of a hydrogen fuel cell system are met.
The supercritical hydrogen stored in the supercritical storage tank is used as a hydrogen source, the storage density is high, the supercritical hydrogen storage and transportation has the advantages that the conversion of the para-hydrogen is not needed in the preparation process, the power consumption of the whole system is low, the problem of liquid evaporation does not exist, the whole fuel cell is more beneficial to the stability of the whole fuel cell, and the fuel source can be provided for the fuel cell for a long time.
The application of the supercritical hydrogen in the hydrogen adding station is disclosed, wherein the supercritical hydrogen stored in the supercritical storage tank is used as a hydrogen source, the storage state of the supercritical hydrogen in the supercritical storage tank is that the temperature is higher than 33.145K, and the pressure is higher than 1.2964 MPa.
The application of supercritical hydrogen in a hydrogen station is shown in FIG. 7. The supercritical hydrogen output by the supercritical hydrogen storage tank passes through the cold energy recovery device, the cold energy of the supercritical hydrogen is recycled and then is pumped into a hydrogenation machine of the hydrogenation station, and when a user hydrogenates to the hydrogenation station, the hydrogen is filled into the user through the hydrogenation machine.
The supercritical hydrogen stored in the supercritical storage tank is used as a hydrogen source, the storage density is high, and the construction cost and the occupied area of the hydrogen station are reduced. The supercritical hydrogen storage and transportation has the advantages that the conversion of normal-secondary hydrogen is not needed in the preparation process, the power consumption of the whole system is low, the problem of liquid evaporation does not exist, and the control convenience and the stability of the whole hydrogenation station are better facilitated.
The application of the supercritical hydrogen as the chemical raw material is provided, wherein the storage state of the supercritical hydrogen is that the temperature is higher than 33.145K, and the pressure is higher than 1.2964 MPa.
In one embodiment, the supercritical hydrogen is used as a chemical raw material in hydrogenation reaction for producing synthetic ammonia, methanol and petroleum refining process, wherein the storage state of the supercritical hydrogen is that the temperature is higher than 33.145K, and the pressure is higher than 1.2964 MPa.
The application of supercritical hydrogen in the hydrogenation reaction for producing synthetic ammonia, methanol and petroleum refining process is shown in FIG. 8. The basic application flow is that hydrogen in the supercritical hydrogen storage tank passes through a cold energy recovery device, the cold energy is recycled and enters a hydrogen reaction device, and the hydrogen is applied to the industries and used as an important chemical raw material.
In another embodiment, the supercritical hydrogen is used as a chemical raw material in the fields of electronics, metallurgy, food processing, float glass, fine chemical synthesis, aerospace industry and semiconductor industry, wherein the storage state of the supercritical hydrogen is that the temperature is more than 33.145K and the pressure is more than 1.2964 MPa.
The supercritical hydrogen stored in the supercritical storage tank is used as a hydrogen source, the storage density is high, the large reserve demand of the application places can be met, meanwhile, in the supercritical hydrogen preparation process, impurities are solidified in the cooling process, and the purity of the supercritical hydrogen is high, so that high-purity hydrogen can be directly obtained after gasification, the purity demand of the hydrogen used in the application places, particularly in the semiconductor industry, is met, and the capital and labor cost of the traditional hydrogen source needing to be repurified are reduced.
The application of the supercritical hydrogen as fuel in a power system is provided, wherein the supercritical hydrogen is stored at a temperature of more than 33.145K and a pressure of more than 1.2964 MPa.
Referring to fig. 9, as shown in the figure, the basic flow of the application of supercritical hydrogen as fuel in a power system is that hydrogen in a supercritical hydrogen storage tank passes through a cold energy recovery device, the cold energy of the hydrogen is recycled and enters a hydrogen combustion device, chemical energy is converted into kinetic energy, and the power device is driven to operate.
The supercritical hydrogen stored in the supercritical storage tank is used as a hydrogen source, the storage density is high, and the energy density of the power system is improved by using the supercritical hydrogen as an energy source of the power system. Supercritical hydrogen stored in the supercritical storage tank is used as fuel, and certain power is provided by hydrogen combustion. Because the combustion product of the hydrogen is water, ash and waste gas are not generated, and the environment is not polluted.
It is understood that the application of supercritical hydrogen is not limited to the above technical fields, and that supercritical hydrogen can also be applied to other technical fields.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (7)

1. The method for storing the supercritical hydrogen is characterized by comprising the steps of cooling hydrogen meeting the pressure and purity to obtain the supercritical hydrogen, inputting the supercritical hydrogen into a supercritical storage tank for storage, wherein the supercritical hydrogen is stored at the temperature of more than 33.145K and at the pressure of more than 1.2964 MPa;
the supercritical storage tank mainly comprises an outer tank (1) and an inner tank (5), wherein a fiber reinforced epoxy resin matrix composite material layer (4) is wrapped outside the inner tank (5); the fiber reinforced epoxy resin-based composite material layer (4) is wrapped with a solid heat-insulating material (3), and a vacuum multilayer heat-insulating layer (2) is arranged between the solid heat-insulating material (3) and the outer tank (1); the supercritical storage tank is also provided with a filling interface (6), and an internal pipeline of the filling interface (6) extends into the bottom of the supercritical storage tank; the supercritical storage tank is also provided with a safety discharge device (9) which comprises a pressure gauge (9-2) and a corresponding valve (9-3), a safety valve (9-1) and a corresponding valve (9-4).
2. The application of supercritical hydrogen in a fuel cell, wherein the supercritical hydrogen stored in a supercritical storage tank is used as a hydrogen source, and the storage state of the supercritical hydrogen in the supercritical storage tank is that the temperature is more than 33.145K and the pressure is more than 1.2964 MPa.
3. The application of supercritical hydrogen in a hydrogenation station is characterized in that the supercritical hydrogen stored in a supercritical storage tank is used as a hydrogen source, and the storage state of the supercritical hydrogen in the supercritical storage tank is that the temperature is higher than 33.145K and the pressure is higher than 1.2964 MPa.
4. The application of the supercritical hydrogen as a chemical raw material is characterized in that the storage state of the supercritical hydrogen is that the temperature is higher than 33.145K, and the pressure is higher than 1.2964 MPa.
5. The application of supercritical hydrogen as a chemical raw material in hydrogenation reaction in the processes of producing synthetic ammonia, methanol and petroleum refining, wherein the storage state of the supercritical hydrogen is that the temperature is higher than 33.145K and the pressure is higher than 1.2964 MPa.
6. The application of the supercritical hydrogen as a chemical raw material in the industries of electronics, metallurgy, food processing, float glass, fine chemical synthesis, aerospace industry and semiconductors is provided, wherein the storage state of the supercritical hydrogen is that the temperature is higher than 33.145K, and the pressure is higher than 1.2964 MPa.
7. The application of supercritical hydrogen as fuel in power system includes that the storage state of the supercritical hydrogen is that the temperature is greater than 33.145K and the pressure is greater than 1.2964 MPa.
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Address after: 1407, 14th floor, building 51, 63 Zhichun Road, Haidian District, Beijing 100083

Patentee after: Beijing Zhongke Fu Hai Low Temperature Technology Co.,Ltd.

Address before: No. 29 East Zhongguancun Road, Haidian District, Beijing 100190

Patentee before: Technical Institute of Physics and Chemistry of the Chinese Academy of Sciences

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