JP2003074796A - Hydrogen storage method and hydrogen storage vessel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hydrogen storage method capable of rapidly filling hydrogen into a hydrogen storage vessel, and sufficiently increasing a hydrogen storage amount. SOLUTION: This hydrogen storage method adopts means for filling hydrogen storage material powder Ph after hydrogen storage into the hydrogen storage vessel 3, discharging the hydrogen storage material powder Ph from the hydrogen storage vessel 3 after a hydrogen discharge, and filling new hydrogen storage material powder Ph after the hydrogen storage into the hydrogen storage vessel 3. When filling the hydrogen storage material powder Ph after the hydrogen storage into the hydrogen storage vessel 3, a fluid F1 comprising the hydrogen storage material powder Ph and a gas g is led into the hydrogen storage vessel 3, the gas g is discharged from the hydrogen storage vessel 3, and the hydrogen storage material powder Ph is left inside the hydrogen storage vessel 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydrogen storage method, and more particularly to a hydrogen storage method and a hydrogen storage container using a hydrogen storage material powder such as hydrogen storage alloy powder or nanostructured carbon powder.

[0002]

2. Description of the Related Art Conventionally, when a hydrogen storage material powder is filled in a hydrogen storage container incorporating a heat medium pipe and hydrogen is stored in the hydrogen storage material powder, the hydrogen storage material powder is cooled by the heat medium. On the other hand, a hydrogen storage method is known in which, when hydrogen is released from the hydrogen storage material powder, the hydrogen storage material powder is heated by a heat medium (for example, Japanese Patent Laid-Open No. 2-1).
64701 gazette).

[0003]

In the rapid filling of hydrogen, the hydrogen storage material powder generates a large amount of heat. However, the conventional method cannot sufficiently absorb this large amount of heat. There is a problem that rapid filling cannot be adopted, and therefore it takes a lot of time to store hydrogen. If hydrogen storage alloy powder is used as the hydrogen storage material powder and the density of the powder increases due to vibration, etc., the container may be deformed when the hydrogen storage alloy powder expands during hydrogen storage. In order to do so, the rigidity of the container must be increased, which also leads to a complicated structure and higher cost.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a hydrogen storage method capable of rapidly filling hydrogen into a hydrogen storage container and sufficiently increasing the hydrogen storage amount. .

According to the present invention to achieve the above object,
Fill the hydrogen storage container with hydrogen storage material powder after hydrogen storage,
A method for storing hydrogen, wherein the hydrogen storage material powder is discharged from the hydrogen storage container after hydrogen is released, and new hydrogen storage material powder after hydrogen storage is filled into the hydrogen storage container. Upon filling the hydrogen storage material powder after storage, a fluid comprising the hydrogen storage material powder and gas is introduced into the hydrogen storage container, and the gas is discharged from the hydrogen storage container and the hydrogen storage material powder is discharged. There is provided a hydrogen storage method for leaving hydrogen in the hydrogen storage container.

When filling the hydrogen storage container with hydrogen as described above, when the hydrogen storage material powder after hydrogen storage is filled into the hydrogen storage container, the time for filling the hydrogen storage container with hydrogen is shortened as compared with the conventional case. Substantially, rapid filling of hydrogen can be realized.

On the other hand, since the hydrogen storage material powder is introduced into the hydrogen storage container as a fluid together with the gas, even if the hydrogen storage material powder is fine, it is kept in a dispersed state and the gas is discharged from the hydrogen storage container. By allowing the hydrogen storage material powder to remain in the container, the deposition amount of the hydrogen storage material powder is gradually increased, and by this, the hydrogen storage amount of the hydrogen storage container can be sufficiently increased.

In this case, as the gas for forming the fluid, an inert gas is suitable for the hydrogen storage material powder, but in the case of the inert gas, a step of removing it from the hydrogen storage container is required. Becomes In order to omit this removing step, it is preferable to use hydrogen as the fluid forming gas.

According to the present invention, in discharging the hydrogen storage material powder after releasing hydrogen from the hydrogen storage container,
A hydrogen storage method is provided in which a gas is blown into the hydrogen storage container to form a fluid comprising the hydrogen storage material powder and the gas, and the fluid is discharged from the hydrogen storage container.

According to the above method, even if the hydrogen storage material powder is solidified, it is possible to loosen the solidified material by blowing gas and easily form a fluid, which allows replacement work of the hydrogen storage material powder. You can do it efficiently.

Further, according to the present invention, the bottom wall has a hydrogen storage material powder filling chamber having an inclined surface having a downward slope from the outer peripheral portion to the center portion, and the center portion of the bottom wall after the hydrogen storage. It contributes to the introduction of the first fluid consisting of the hydrogen storage material powder and the gas into the filling chamber, and at the same time from the filling chamber of the second fluid consisting of the hydrogen storage material powder and the gas after hydrogen release. At least a part of the bottom wall and the introduction / delivery portion that contributes to the discharge are formed to allow the discharge of the gas from the filling chamber during the hydrogen storage material powder introduction process, while the hydrogen storage material powder is discharged. In the discharging process, a hydrogen storage container having a filter member that allows the gas to be blown into the filling chamber is provided.

With the above-mentioned structure, the hydrogen storage material powder is heated only in the filling chamber and does not need to be cooled. It is possible to expand the space occupied by the, and thereby increase the hydrogen storage capacity. Also, when hydrogen-absorbing alloy powder is used, hydrogen is not stored in the filling chamber, so that the rigidity required for the container can be relaxed, and the structure can be simplified and the cost can be reduced.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, a hydrogen storage system 1 is mounted on a vehicle such as an automobile equipped with a fuel cell 2, a railroad vehicle, etc., and has five hydrogen storage containers 3 which are adjacent to each other. The two containers 3 are arranged in a line so as to be in close contact with each other. At the hydrogen discharge port 5 existing on the upper wall 4 of each container 3,
Conduits 7 with open / close valves 6 are connected, which are connected to one conduit 9 extending from the hydrogen inlet 8 of the fuel cell 2. In order to supply the heat medium to each hydrogen storage container 3, one end of the supply pipe 10 is connected to the heat medium outlet 11 in the cooling system of the fuel cell 2, and the other end of the supply pipe 10 exists.
The branched portions 12 that are branched into two are respectively connected to the inlets 13 of the heat medium pipes of the five vessels 3. In addition, in order to return the heat medium from each hydrogen storage container 3 to the fuel cell 2, a return pipe 14
5 branching portions 15 present at one end of each are respectively connected to the outlets 16 of the heat medium pipes of the 5 vessels 3,
The other end of the return pipe 14 is connected to the heat medium inlet 17 in the cooling system of the fuel cell 2.

As shown in FIGS. 2 to 4, the container 18 of the hydrogen storage container 3 comprises a rectangular parallelepiped upper shell 19 having an upper wall 4.
The upper shell 19 has a lower truncated pyramid-shaped lower shell 20 which is continuous with the lower opening edge portion.

A filter member 21 having an inverted quadrangular truncated pyramid shape, which is the same shape as that of the lower shell body 20, and thus having a substantially funnel shape, is arranged in the vicinity of the lower shell body 20 in the container 18, and its outer peripheral portion is formed. The filter member 21 is attached to the inner peripheral surface of the upper shell body 19 to define a hydrogen storage material powder filling chamber 22 above and a gas chamber 23 below. The filter member 21 as a whole constitutes a bottom wall of the filling chamber 22, and the bottom wall has four slopes 24 having a downward slope from the outer peripheral portion toward the central portion. The tilt angle in this case is set to exceed the repose angle of the hydrogen storage material powder. The filter member 21 has a plurality of pores having a diameter that allows gas to pass through but does not allow hydrogen storage material powder to pass through. A filter member 25 having similar pores is also provided on the hydrogen discharge port 5 of the upper wall 4. A coil-shaped heat medium pipe line 26 is provided in the filling chamber 22, and its inlet 13
The side having the is drawn out from the lower part of the peripheral wall 27 of the upper shell 19, and the side having the outlet 16 is drawn out from the upper part of the peripheral wall 27 of the upper shell 19.

The lower shell body 20 has a bottomed connecting cylinder portion 28 projecting downward at the center thereof, and the inside thereof communicates with the gas chamber 23. Further, the filter member 21 has a connecting tubular portion 29 projecting downward at the center thereof, and the connecting tubular portion 29 penetrates the bottom wall of the bottomed connecting tubular portion 28 and the inside thereof is filled with the filling chamber 2.
Connect to 2.

One end of a conduit 31 having a second opening / closing valve 30 is connected to the connecting cylinder portion 29, and the other end is connected to the first port p1 of the first three-way valve 32. The second port p2 of the first three-way valve 32 is connected via a conduit 33 to a fluid supply device 34 which supplies the first fluid, and the third port p3 is connected via a conduit 35 to the second fluid. Fluid recovery device 3 for recovery
6 is connected. The first fluid consists of hydrogen storage material powder and gas after hydrogen storage, while the second fluid is
It consists of hydrogen storage material powder and gas after hydrogen is released. The inside of the connection tubular portion 29 is an inlet / outlet 37 of the filling chamber 22, and the inlet / outlet 37 contributes to the introduction of the first fluid into the filling chamber 22 and the derivation of the second fluid from the filling chamber 22. It is an introductory / deriving part that contributes.

One end of a conduit 39 having a third opening / closing valve 38 is connected to the bottomed connecting tubular portion 28, and the other end has a second three-way valve 40.
Is connected to the first port p1. Second of the second three-way valve 40
The port p2 is connected to the first port p1 of the third three-way valve 41 via the conduit 42, and the second port p2 of the third three-way valve 41 is connected to the vacuum pump P via the conduit 43.
The discharge side of the vacuum pump P is connected via the conduit 46 to the gas recovery unit 4
4 is connected. The third port p3 of the third three-way valve 41 is connected (or open to the atmosphere) to the gas container 44 via the conduit 45. Further, the third port p3 of the second three-way valve 40 is connected to the compressed gas supply device 48 via the conduit 47.

Next, the hydrogen storage material 3 is filled with hydrogen storage material powder, hydrogen is supplied to the fuel cell 2, and the container 3 is supplied.
The discharge of the hydrogen storage material powder from the will be described.

In FIG. 5, the second and third on-off valves 30, 3
8 is “open”, the first opening / closing valve 6 is “closed”, between the first and second ports p1 and p2 of the first and second three-way valves 32 and 40, and the first and third of the third three-way valve 41. The fluid supply device 34 is operated with the ports p1 and p3 being in "communication" with each other, and the first fluid F1 composed of the hydrogen storage material powder Ph and the gas g after hydrogen storage is supplied to the inlet / outlet port 37 at a predetermined pressure. After that, the fluid is introduced into the filling chamber 22 to fill the inside thereof, then the operation of the fluid supply device 34 is stopped, and the second opening / closing valve 3
0 is closed. During this time, a part of the gas g in the first fluid F1 passes through the filter member 21, the gas chamber 23, the third opening / closing valve 38, the second three-way valve 40, and the third three-way valve 41, and enters the gas recovery unit 44. Be recovered.

As shown in FIG. 6, the vacuum pump P is operated by shutting off the first and third ports p1 and p3 of the third three-way valve 41 and connecting the first and second ports p1 and p2. . As a result, the gas g in the first fluid F1 is sufficiently discharged, and the hydrogen storage material powder P on the filter member 21.
h is left, and the gas g is recovered by the gas recovery device 44. Then, the operation of the vacuum pump P is stopped.

As shown in FIG. 7, the second opening / closing valve 30 is "opened", the fluid supply device 34 is operated, and the first fluid F1 is introduced into the filling chamber 22 at a predetermined pressure. The operation of the fluid supply device 34 is stopped and the second opening / closing valve 30 is “closed”. The central portion of the hydrogen storage material powder Ph deposited on the filter member 21 is the first fluid F1.
The first fluid F1 is blown away by the powder Ph and exists in the central portion and above the powder Ph.

Thereafter, the discharge of the gas g shown in FIG. 6 and the introduction of the first fluid F1 shown in FIG. 7 are repeated, and the filling chamber 22 is filled with the hydrogen storage material powder Ph as shown in FIG. Then, the operation of the vacuum pump P is stopped and the third opening / closing valve 38 is closed.

In order to prevent clogging of the filter member 21 in the above process, in order to apply a reverse pressure to the filter member 21 to clean it, as shown in FIG.
The compressed gas g1 is supplied from the compressed gas supply device 48 to the gas chamber 23 through the third opening / closing valve 38 by connecting the third ports p1 and p3.

In FIGS. 1 and 2, the hydrogen is supplied to the fuel cell 2 by flowing the heat medium from the fuel cell 2 to the heat medium pipe 26 through the supply pipe 10 by opening the first opening / closing valve 6. Then, the hydrogen storage material powder Ph is heated to release hydrogen from the powder Ph.

In the case of discharging the hydrogen storage material powder Ph after releasing hydrogen from the filling chamber 22, as shown in FIG.
A state in which the third opening / closing valves 30 and 38 are “open”, the first opening / closing valve 6 is “closed”, and the first and third ports p1 and p3 of the first and second three-way valves 32 and 40 are “communication”, respectively. Then, the compressed gas g1 is ejected from the compressed gas supply device 48 from the bottom wall side of the filling chamber 22 through the gas chamber 23 and the filter member 21.
As a result, the hydrogen storage material powder Ph is loosened to form the second fluid F2.
7, the second on-off valve 30 and the first three-way valve 32 to collect the fluid in the fluid collecting device 36. The empty filling chamber 22 is filled with the hydrogen storage material powder after hydrogen storage in the same manner as described above. On the other hand, the recovered powder is reused after being subjected to hydrogen storage treatment.

Next, a specific example will be described. Hydrogen storage alloy powder: LaNi ₅ powder, particle size 2 μm or more, 10 μm or less, effective hydrogen storage amount 1.2 wt%; fluid forming gas: hydrogen; maximum working pressure of hydrogen storage container: 0.9 MP
a; minimum release pressure: 0.2 MPa; heat medium: long life coolant (LLC), temperature 50 ° C .; filter member: sintered stainless steel, pore diameter 5 μm or less; The equivalent of 350 kg La
When the filling chamber 22 was filled with the Ni ₅ powder in the same manner as described above, the time required for the filling was about 5 minutes. On the other hand, the time required to discharge 350 kg of LaNi ₅ powder from the filling chamber 22 was about 5 minutes.

For comparison, 350 kg of La is placed in the filling chamber 22.
Ni ₅ powder was filled, and then LaNi ₅ powder was allowed to occlude hydrogen while circulating cooling water at a flow rate of 50 L / min through the heat medium pipe line 26, and the time until the hydrogen occlusion amount reached about 4 kg was investigated. It turned out to be about 30 minutes.

Therefore, in the embodiment, the filling chamber 22
LaNi ₅ powder after hydrogen release is discharged from the chamber, and then the filling chamber 22 is filled with LaNi ₅ powder after hydrogen storage.
If the discharging / filling work is a hydrogen storage work, the working time is shortened to one-third of that of the comparative example.

The filter member 21 may form at least a part of the bottom wall 49 of the filling chamber 22, for example, approximately half of the bottom wall 49 as shown in FIG. See also FIG.
As shown in FIG. 1, the body 18 may be cylindrical.

In the hydrogen storage container 3 shown in FIG. 12, the introduction and derivation part of the hydrogen storage container 3 is constructed as follows. That is,
A bottomed cylinder 50 is provided at the center of the filter member 21 that is the bottom wall so as to project downward, and the inside thereof functions as a recess 51 that opens upward. An inner pipe 52 and an outer pipe 53 surrounding the inner pipe 52 penetrate the upper wall 4 of the filling chamber 22 and extend vertically in the filling chamber 22.
2 is supported by the outer tube 53, and the outer tube 53 is supported by the upper wall 4. The lower openings of the inner and outer tubes 52, 53 are located near the bottom wall, respectively, in the recess 51 in the embodiment. Inner pipe 52
Causes the first fluid F1 to flow down, and the second fluid F
Form a passage for blowing up 2. The outer tube 53 is
Gas is ejected into the recess 51 in order to form an ascending gas flow that blows up the second fluid F2 in the inner pipe 52 thereof. In this case, the rising gas flow is formed even without the concave portion 51, but the concave portion 51 has a function of immediately guiding the ejected gas to the inner pipe 52 without diffusing, so that the rising gas flow can be formed easily and reliably. Become. Further, the concave portion 51 has a function of injecting the second fluid F2 into the concave portion 51 and collecting the second fluid F2 to promote the blowing up. In this way, the inner pipe 52 and the outer pipe 53, and the recess 51 as necessary, constitute an inlet / outlet portion for the fluid.

One end of a conduit 31 having the second opening / closing valve 30 is connected to the upper end of the inner pipe 52, and the other end is connected to the first three-way valve 32.
Is connected to the first port p1. Second of the first three-way valve 32
A fluid supply device 34 for supplying the first fluid is connected to the port p2 via a conduit 33, and the third port p3
A fluid recovery device 36 for recovering the second fluid is connected to the via a conduit 35.

The lower shell 20 has a connecting cylinder portion 54 which communicates the inside with the gas chamber 23 and surrounds the bottomed cylinder 50.
One end of a conduit 39 having the third opening / closing valve 38 is connected to the connecting cylinder portion 54, and the other end is connected to the first port p1 of the second three-way valve 40. Second port p2 of second three-way valve 40
Is connected to the first port p1 of the third three-way valve 41 via the conduit 42, and the second port p2 of the third three-way valve 41 is
It is connected to the vacuum pump P via a conduit 43. The discharge side of the vacuum pump P is connected to the gas recovery device 44 via a conduit 46. The third port p3 of the third three-way valve 41 is connected (or opened to the atmosphere) to the gas collector 44 via the conduit 45. Further, a conduit 47 is provided at the third port p3 of the second three-way valve 40.
The compressed gas supply device 48 is connected via the
The middle part of 7 and the upper end of the outer tube 53 are connected by a conduit 56 having a fourth opening / closing valve 55. Other configurations are the same as those in FIG.

When the filling chamber 22 is filled with the hydrogen storage material powder after hydrogen storage, the same valve operation as described above is performed and the fourth opening / closing valve 55 is "closed", as shown in FIG.
The first fluid F1 is caused to flow down the inner pipe 52, and then the concave portion 51 is formed.
Of the gas g by the filter member 21 and the vacuum pump P in the same manner as described above, and then the introduction of the first fluid F1 into the filling chamber 22 and the subsequent gas discharge are repeated. The filling chamber 22 is filled with the hydrogen storage material powder Ph.

When the hydrogen storage material powder Ph after the hydrogen is released is discharged from the filling chamber 22, the same valve operation as described above is performed, and the compressed gas g1 is supplied to the gas chamber 23 and the filter member 21 as shown in FIG. Through the bottom wall side of the filling chamber 22 through. As a result, the hydrogen storage material powder Ph is loosened and the second
Fluid F2 is formed. Further, when the fourth opening / closing valve 55 is “open”, the compressed gas g1 is ejected from the outer pipe 52 into the recess 51, and the compressed gas g1 loosens the hydrogen storage material powder Ph in the recess 51 and the compressed gas g1. As a result of flowing into the inner pipe 52, a rising gas flow is formed.
The second fluid F2 flowing into the concave portion 51 and into the concave portion 51 is entrained in the rising gas flow and blown up in the inner pipe 52, and then collected by the fluid collecting device 36.

[0036]

According to the first aspect of the present invention, it is possible to provide a hydrogen storage method capable of rapidly filling hydrogen into a hydrogen storage container and sufficiently increasing the hydrogen storage amount.

According to the third aspect of the invention, the replacement work of the hydrogen storage material powder can be efficiently performed.

According to the fifth aspect of the present invention, it is possible to rapidly fill the hydrogen storage container with hydrogen, and it is possible to sufficiently increase the hydrogen storage amount. It is possible to provide a hydrogen storage method capable of efficiently performing

According to the second, fourth and sixth aspects of the invention, since the fluid forming gas is hydrogen, there is provided a hydrogen storage method which does not cause any trouble even if it remains in the hydrogen storage container. Can be provided.

According to the seventh aspect of the present invention, it is possible to provide a method suitable for storing hydrogen in the hydrogen storage container of a vehicle equipped with a fuel cell.

According to the invention described in claims 8 to 11, with the simplification of the heat medium pipe, the space occupied by the hydrogen storage material powder in the filling chamber is expanded to increase the hydrogen storage amount,
Further, it is possible to provide a hydrogen storage container having a simplified structure and reduced cost.

According to the twelfth aspect of the present invention, it is possible to provide a hydrogen storage container suitable for hydrogen storage in a vehicle equipped with a fuel cell.

[Brief description of drawings]

FIG. 1 is a plan view of a hydrogen storage system.

2 is a cross-sectional view of a first example of a hydrogen storage container according to FIG.
2-2 taken along the line.

FIG. 3 is a sectional view taken along line 3-3 of FIG.

FIG. 4 is a sectional view taken along line 4-4 of FIG.

FIG. 5 is an explanatory diagram of the first step regarding filling with hydrogen storage material powder.

FIG. 6 is a second step explanatory diagram related to filling with hydrogen storage material powder.

FIG. 7 is a third step explanatory diagram related to filling with hydrogen storage material powder.

FIG. 8 is an explanatory diagram showing the end of filling with hydrogen storage material powder.

FIG. 9 is an explanatory diagram showing a step of discharging hydrogen storage material powder.

10 is a cross-sectional view of a second example of the hydrogen storage container, which corresponds to FIG. 4.

FIG. 11 is a cross-sectional view of a third example of the hydrogen storage container and corresponds to FIG. 4.

FIG. 12 is a cross-sectional view of a fourth example of a hydrogen storage container and corresponds to FIG.

FIG. 13 is an explanatory diagram showing a fluid and a gas flow when the hydrogen storage material powder is filled.

FIG. 14 is an explanatory diagram showing a fluid and a gas flow when the hydrogen storage material powder is discharged.

[Explanation of symbols]

2 ... Fuel cell 3 ... Hydrogen storage container 21 ... Filter member 22 ... filling room 24 …… Slope 37: Doorway (introduction / deriving section) 52 ... Inner pipe (introducing and deriving component) 53 ... Outer tube (introducing and deriving component) F1 ... the first fluid F2 ... Second fluid Ph ... Hydrogen storage material powder g …… ... gas g1 ... compressed gas

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Mitsuya Hosoe             1-4-1 Chuo Stock Market, Wako City, Saitama Prefecture             Inside Honda Research Laboratory F-term (reference) 3D035 AA00 AA01 AA05                 3E072 EA01                 4G040 AA27 AB01                 5H027 AA02 BA13

Claims (12)

[Claims] 1. A hydrogen storage material powder (Ph) after hydrogen storage is filled in a hydrogen storage container (3), and after hydrogen release, the hydrogen storage material powder (Ph) is discharged from the hydrogen storage container (3). Then, a new hydrogen storage material powder (P
A hydrogen storage method for filling the hydrogen storage container (3) with h), wherein the hydrogen storage material powder (Ph) is filled into the hydrogen storage container (3) after the hydrogen storage. A fluid (F1) consisting of Ph) and gas (g) is introduced into the hydrogen storage container (3), the gas (g) is discharged from the hydrogen storage container (3), and the hydrogen storage material powder ( A method for storing hydrogen, characterized in that Ph) is left in the hydrogen storage container (3). 2. The hydrogen storage method according to claim 1, wherein the gas (g) forming the fluid (F1) is hydrogen. 3. When discharging the hydrogen storage material powder (Ph) after hydrogen is released from the hydrogen storage container (3), a gas (g1) is blown into the hydrogen storage container (3) to discharge the hydrogen storage material. The hydrogen storage method according to claim 1 or 2, wherein a fluid (F2) composed of powder (Ph) and gas (g1) is formed, and the fluid (F2) is discharged from the hydrogen storage container (3). 4. Gas (g) forming the fluid (F2)
The hydrogen storage method according to claim 3, wherein 1) is hydrogen. 5. A hydrogen storage container (3) provided with a hydrogen storage material powder filling chamber (22) having a slope (24) whose bottom wall has a downward slope from its outer peripheral portion toward its central portion, Hydrogen storage material powder (Ph) after hydrogen storage in the filling chamber (22)
In the filling of hydrogen, the hydrogen storage material powder (Ph) and gas (g) after hydrogen storage are supplied from the introduction / outlet part (37; 52, 53) in the center of the bottom wall of the filling chamber (2). A first fluid (F1) consisting of the fluid (F1) is introduced into the filling chamber (22), and the gas (g) is introduced through the filter member (21) forming at least a part of the bottom wall into the filling chamber (22).
And the hydrogen storage material powder (Ph) is left in the filling chamber (22) while being discharged from the filling chamber (2).
In discharging the hydrogen storage material powder (Ph) after the hydrogen is released from 2), the gas (g1) is blown into the filling chamber (22) through the filter member (21) to release the hydrogen after the hydrogen is released. The hydrogen storage material powder (Ph) and gas (g
Forming a second fluid (F2) consisting of
The hydrogen storage method is characterized in that the fluid (F2) is discharged from the filling chamber (22) through the introduction and discharge section (37; 52, 53). 6. The first and second fluids (F1, F2)
The hydrogen storage method according to claim 5, wherein the gas (g, g1) forming hydrogen is hydrogen. 7. The hydrogen storage container (3) is mounted on a vehicle equipped with a fuel cell (2) to supply hydrogen to the fuel cell (2). Or the hydrogen storage method described in 6. 8. A hydrogen storage material powder filling chamber (22) having a bottom wall having a slope (24) descending from an outer peripheral portion of said bottom wall toward a central portion, and at the center portion of said bottom wall, after hydrogen storage. Of the hydrogen storage material powder (Ph) and gas (g) of the first fluid (F1) into the filling chamber (22), and the hydrogen storage material powder (P
Second fluid (F2) consisting of h) and gas (g1)
Of the gas (g) in the hydrogen storage material powder introduction process by forming at least a part of the introduction wall and the introduction part (37; 52, 53) that contributes to the discharge from the filling chamber (22). ) Is allowed to be discharged from the filling chamber (22), while in the process of deriving the hydrogen storage material powder (Ph), a filter member (that allows the gas (g1) to be blown into the filling chamber (22). 21) The hydrogen storage container characterized by having. 9. The charging / discharging portion is provided in the filling chamber (2).
The hydrogen storage container according to claim 8, which is the inlet / outlet (37) existing in the bottom wall of 2). 10. The charging / discharging portion is provided in the filling chamber (2).
2) An inner pipe (52) extending in the vertical direction and having a lower opening located near the bottom wall, and an outer pipe surrounding the inner pipe (52) and having the lower opening located near the bottom wall. (53), the inner pipe (52) causes the first fluid (F1) to flow down, and the second fluid (F).
2) A passage for blowing up the outer pipe (53) is formed.
The hydrogen storage container according to claim 8, wherein the gas ejects gas (g1) to form an ascending gas flow that blows up the second fluid (F2) in the inner pipe (52). 11. The first and second fluids (F1, F)
Hydrogen storage container according to claim 8, 9 or 10, wherein the gas (g, g1) forming 2) is hydrogen. 12. The hydrogen storage container according to claim 8, 9, 10 or 11, which is mounted on a vehicle equipped with a fuel cell (2) and supplies hydrogen to the fuel cell (2).