JP2000199090A - Method and device for producing hydrogen gas - Google Patents

Abstract

PROBLEM TO BE SOLVED: To produce hydrogen gas as clean energy by electrochemically decomposing an electrolyte by the potential difference between the different metals in close contact with each other without using external energy and to self- control the yield by transferring the electrolyte to a spare electrolyte tank. SOLUTION: An electrolyte 12 and an electrode 11 for electrochemically decomposing the electrolyte to hydrogen gas consisting of the different metals in close contact with the electrolyte are put in a generation tank 1. The electrolyte is transferred to a spare electrolyte tank 2 positioned above the generation tank by the pressure of the hydrogen gas in the generation tank through a liq. pipe 3 opened close to the bottom of the generation tank and stored to control the yield of the hydrogen gas by the change in a contact area between the electrode and electrolyte, and an opening degree controller 5 is furnished in the middle of a vent pipe to produce hydrogen gas.

Description

DETAILED DESCRIPTION OF THE INVENTION

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for producing hydrogen gas for controlling the amount of hydrogen gas generated.

2. Description of the Related Art The hydrogen gas producing apparatus of the present invention controls the amount of hydrogen gas generated by adjusting the contact area between an electrode and an electrolyte, and no such apparatus has been found.

[0003] In addition, the electrolyte is transferred from the generation tank to the electrolyte preservation tank at the pressure of the hydrogen gas generated by itself and stored or returned to increase or decrease the amount of contact by increasing or decreasing the contact area.
No such method and apparatus is found.

[0004] Further, the hydrogen gas producing apparatus of the present invention includes:
Electrolytic solution is electrochemically decomposed to generate hydrogen gas due to the potential difference generated between the dissimilar metals in close contact with the electrodes.
It is adsorbed and stored on a hydrogen storage alloy, and such a device is not found.

[0005] Furthermore, the generated hydrogen gas is used to generate electric power in a fuel cell, and this power is used to pressurize or heat the hydrogen storage alloy to release the adsorbed hydrogen gas. Such a device has not been found. .

[0006] It is located at the upper position of the generation tank, and always keeps the specified water level or higher when the electrolyte is exhausted or evaporated and runs short.
It supplies fresh electrolyte and does not find such a device.

[Problems to be solved by the invention]

As described above, there is a conventional method for producing hydrogen gas. However, it is an easy-to-operate, small-sized apparatus that can be produced and used when needed, or can be safely stored.
It is an object of the present invention to provide a hydrogen gas production method and an apparatus therefor that can control and produce only a required amount without the need to introduce energy from outside.

Further, in this method and apparatus, the electrolytic solution generates and consumes hydrogen gas, or the water content of the electrolytic solution becomes gas and evaporates and decreases. And to automatically replenish the solution. [Means for solving the problem]

The present invention is provided with the following means for solving the problems.

That is, the method for producing hydrogen gas of the present invention comprises:
An electrode made of a dissimilar metal that comes into contact with the electrolyte that electrochemically decomposes the electrolyte to generate hydrogen gas is housed in the generation tank, and the amount of hydrogen gas generated is changed by the variation in the contact area between the electrode and the electrolyte. A method and an apparatus for producing hydrogen gas which are controlled. (Claims 1 and 2)

Further, in the hydrogen gas producing method of the present invention, the amount of hydrogen gas generated is controlled by transferring the electrolytic solution in the generating tank to the reserve tank for electrolytic solution at the pressure of the generated hydrogen gas. A method and apparatus for producing hydrogen gas. (Claim 3,
4)

Further, the hydrogen gas producing apparatus of the present invention comprises a generating tank, a fuel cell for generating power by a chemical reaction between the hydrogen gas generated in the generating tank and oxygen in the atmosphere, and a storage tank for storing the hydrogen gas generated in the generating tank. This is a hydrogen gas production apparatus provided with a hydrogen storage tank for storing a hydrogen storage alloy to be stored. (Claim 5)

In the hydrogen gas producing apparatus according to the present invention, a replenishing solution opening / closing stopper and a replenishing solution passage pipe are connected to a bottom surface of a sealed electrolytic solution replenishing tank located above the generating tank. The hydrogen gas producing apparatus is characterized in that it is opened at a specified water level. (Claim 6)

[Operation] According to the method and apparatus of the present invention, the method and apparatus are performed based on the principle that hydrogen gas is generated by electrochemically decomposing an electrolytic solution with a potential difference generated between closely dissimilar metals serving as electrodes. Since the amount of generated hydrogen gas is proportional to the contact area of the electrode with the electrolyte immersed in the electrolyte, the amount of hydrogen gas is controlled by raising and lowering the water level of the electrolyte and adjusting the contact area with the electrode. Therefore, there is an effect that the adjustment can be performed simply and surely.

According to the method and apparatus of the present invention, when controlling the amount of hydrogen gas generated, the contact area between the electrode and the electrolyte is adjusted by the pressure of the generated hydrogen gas. While fixed to the tank, the electrolyte is transferred from the generation tank to another electrolyte preservation tank via a flow pipe, stored and returned, and the water level of the electrolyte is raised and lowered to make contact between the electrode and the electrolyte. Since the method and apparatus reduce the area, there is an effect that control can be performed very efficiently with a simple structure without using external energy.

Further, according to the apparatus of the present invention, when the amount of the electrolytic solution in the generating tank is reduced, the electrolytic solution is supplied to a predetermined water level to secure the hydrogen gas generating amount at all times. In order to make it possible to open the specified level of the electrolyte in the generating tank with a replenisher liquid passage pipe from the opening of the closed container,
Since the electrolyte can be automatically replenished, the device has a simple structure that can be operated without using external energy such as a motor and a pump.

Further, according to the apparatus of the present invention, the hydrogen gas produced in the generation tank is adsorbed on the hydrogen storage alloy and stored.
There is no inconvenience if it can be supplied immediately. When removing the stored hydrogen gas, supply hydrogen gas from the generation tank to a fuel cell that generates electricity using hydrogen gas and oxygen, take in oxygen from the atmosphere and generate electricity, and pressurize or heat the hydrogen storage alloy with a pump or heater. And because it is a structure that takes out and uses hydrogen gas, without using external energy,
Since it can be controlled only by the hydrogen gas generated by itself, this device alone can be used at any time as electricity and gas energy.

If the apparatus of the present invention is used, the generated hydrogen gas is connected to the generation tank, the electrolyte preservation tank, the hydrogen storage tank, and the fuel cell by a ventilation pipe, respectively, and an opening / closing control device is provided in the ventilation pipe. The pressure in the ventilation pipe fluctuates just by opening and closing the switch or switching control device of the utilization equipment, the level of the electrolyte in the generation tank goes up and down, controlling the amount of hydrogen gas generated, and pressurizing the hydrogen storage alloy Alternatively, the hydrogen gas is discharged by heating, and the hydrogen gas is supplied in a self-controlled manner, so that the apparatus is extremely simple and does not need to store more gas than necessary.

[Embodiment of the Invention]

In the method and the apparatus according to the present invention for generating hydrogen gas by the potential difference generated between closely dissimilar metals immersed in the electrolytic solution (12), the potential difference between the dissimilar metals is known from an electrochemical permutation table. Two kinds of metals may be selected according to this permutation table. For example, K (potassium), L
i (lithium), Na (sodium), Al (aluminum), Ti (titanium), Zn (zinc), Fe
(Iron), Ni (nickel), Sn (tin), Pb (lead),
Mn (manganese), Cr (chrome), Cu (copper), M
Although o (molybdenum), Ag (silver), and Au (gold) can be considered, any other metal may be selected as long as a potential difference is generated in a close junction state between different metals, and the potential difference is high. Is desirable. (See Figs. 6 and 7)

In the method and the apparatus for generating hydrogen gas from the electrolytic solution (12) by the potential difference generated between the dissimilar metals as described above, the electrolytic solution (12) is preferably a weak electrolytic solution having no danger in handling. The main agent used in the electrolytic solution (12) includes organic acids such as citric acid, glycine, cinnamic acid, succinic acid, salicylic acid, formic acid, glutamic acid, ascorbic acid, oxalic acid, phosphoric acid, tartaric acid, lactic acid, and acetic acid. It can be determined by evaluating toxicity, price, etc. from those with a high dissociation constant.

In order to stably generate a large amount of hydrogen gas, an inorganic acid such as hydrochloric acid, sulfuric acid, sodium hydroxide,
It is preferable to add silver nitrate, potassium hydroxide, potassium chloride, sodium chloride and the like.

According to the method and the apparatus of the present invention for generating hydrogen gas from the electrolytic solution (12) by a potential difference generated between different types of metals, when the electrolytic solution (12) is acidic, the surface of the different type metal as an electrode is Oxidation reduces the exchange efficiency with hydrogen ions, so the addition of, for example, ethylene glycol as an antioxidant for the dissimilar metal as the electrode can prevent the surface of the dissimilar metal as the electrode from being oxidized. A stable amount of hydrogen gas can be obtained.

In the method and the apparatus for generating hydrogen gas from the electrolytic solution (12) by the potential difference generated between different metals, the pH of the electrolytic solution (12) is desirably 2.5 to 8.0. According to the result of the experiment, the hydrogen gas can be efficiently and uniformly generated stably by setting the organic acid of the main agent to 50% (weight ratio) or less. Other inorganic acids are 20
(Weight ratio)% or less is effective. The antioxidant depends on the type of metal, but 10 to 40 (weight ratio)
% Should be added. The water to be diluted is desirably purified water because generation of impurities is disliked.

In an apparatus for generating hydrogen gas by utilizing a potential difference generated between different metals, it is necessary to keep the different metals in close contact with each other. For example, Zn (zinc) and Cu, which are relatively inexpensive, abundant and easy to process, are used for two different kinds of metals.
If you choose (copper), as a way to get close
A melt-rolling bonding method in which Zn (zinc), which melts at a lower temperature than Cu (copper), is flowed on Cu (copper) and roll-bonded, and a melting method in which Zn (zinc) is sprayed on a Cu (copper) plate Spray adhesion method, powder pressure welding molding method in which Cu (copper) powder and Zn (zinc) powder are blended at a fixed ratio and molded by applying pressure and temperature, contact between Cu (copper) and Zn (zinc) Mold into granules with a constant surface ratio and mix at a constant ratio. Cu (copper) granules with a high melting temperature are first bonded by high-temperature point melting, molded into a porous shape, and then melted at a low melting temperature. Immerse in a melt of Zn (zinc) and place Z between Cu (copper) porous
sintering molding method of infiltrating and molding n (zinc), Zn
An electroplating method of electroplating Cu (copper) on a (zinc) plate or Zn (zinc) on a Cu (copper) plate, drilling a hole in a Cu (copper) or Zn (zinc) plate, Casting molding method for driving metal, Z of low melting metal among dissimilar metals
n (zinc) is melted in a crucible, and a high-temperature molten metal Cu (copper) molded into a rod shape is inserted into the crucible and cooled to form an adhered state. The material and method may be selected based on the characteristics of the material used, the method of use, and the like.

Of the two selected metals, the metal on the side of the electric field solution that binds to the hydrogen molecules becomes a metal salt and dissolves into the electric field solution, so that the weight is reduced. On the other hand, since the metal on the opposite side is not reduced and remains as it is, when two different metals are processed in close contact, the metal on the reduced side may be thick and the metal on the non-reduced side may be thin. When making by the method, it is economical to plate the metal that does not lose weight.

As described in the previous section, the amount of current generated between the two selected metals is proportional to the contact area. In the case of the method, it is economical and the production cost can be reduced by adjusting the diameter and the mixing ratio of the two kinds of metal granules.

Since the electrolytic solution (12) is acidic or alkaline in the generating tank (1), if an acid or alkaline material is selected, or if the surface is treated so as not to cause corrosion, deterioration, etc. Good. Furthermore, it is preferable to select the material in consideration of the material and thickness that can withstand the internal pressure, good workability, excellent weather resistance due to being placed outdoors, light weight, and the like.

As for the electrolyte preparatory tank (2), it is preferable to select a material from the same viewpoint as that of the generating tank (1).

In the generating tank (1), closely dissimilar metals (A, B) are formed into a thin plate shape to form electrodes (11), which are arranged vertically at intervals. Further, the electrolytic solution (12) is injected so that the electrode (11) is sufficiently immersed, and the upper surface of the generating tank (1) is injected.
8) is provided with a liquid passage pipe (5) which is opened in the vicinity of the bottom of the generating tank (17) and whose upper end is opened to the bottom (24) of the electrolyte preparatory tank in an airtight state by packing (181, 181 ′) or the like. Cover with a generating tank top lid (13) and seal. Generation tank bottom (17)
Is inclined in any direction, and a waste liquid discharge switch (16) is provided at the lowest part. The generation tank is mounted on a mounting table (101) by correcting the inclination of the bottom of the generation tank (17) and making it horizontal.
(See FIGS. 5, 6, 7, 8, and 10)

In the electrolyte preparatory tank (2), the bottom surface (24) of the electrolyte preparatory tank is located higher than the upper lid (13) of the generating tank, and the liquid supply pipe (4) provided in the upper lid (13) of the generating tank has an internal passage. The bottom surface (24) of the electrolyte preliminary tank is inclined toward the opening of the liquid pipe so that the opening position of the liquid pipe (4) is at the lowest position. It is preferable to provide a shut-off valve (27) that opens and closes in conjunction with an intake / exhaust valve (25) provided on the electrolyte reserve tank upper lid (23). Further, a waste liquid exhaust switch (26) is provided near the bottom surface. (See Fig. 8)

The packing (18) is used also as the bottom surface (24) of the electrolyte preliminary tank and the upper lid (13) of the generating tank (1).
1, 181 '), and the liquid passage tube (3) is integrally provided on the bottom surface (24) of the electrolyte reserve tank. Then, the intake / exhaust valve (25) provided in the electrolyte reserve tank upper lid (23) is opened, and when the electrolyte (13) is transferred from the generation tank (1) by the internal pressure of the hydrogen gas, the internal air is discharged. The electrolyte (13) is pushed up from the generating tank (1) without resistance and stored in the electrolyte reserve tank (2). (See FIGS. 2, 3, and 10)

The hydrogen gas generated in the generating tank (1) is passed through the generating tank upper lid (13) or at least so that the level of the electrolytic solution (13) in the generating tank (1) is higher than the highest level. A trachea (4) is attached and connected to an open / close control device (5) via a gas-liquid separator (41). (See FIGS. 9 and 11)

An opening / closing controller (5) having a pressure control function from the generating tank (1) via a gas-liquid separator (41) controls a hydrogen gas vent pipe (4). 8)
Ventilation pipe (48) to the hydrogen absorption tank (7)
7) and a vent pipe (46) to the fuel cell (6). (See Fig. 4)

The opening / closing control device (5) controls all the ventilation pipes (4).
6, 47, 48), and the generation tank (1)
Then, when hydrogen gas continues to be generated, the pressure in the generation tank (1) increases steadily, so that the level of the electrolyte (12) is pushed down, and the electrolyte (12) is discharged from the flow pipe (4). It is transferred into the electrolyte reserve tank (2). In this case, since the internal pressure of the intake / exhaust valve (25) is increased, the intake / exhaust valve (25) is opened and does not hinder the transfer of the electrolytic solution (2). (See Figs. 1, 2, and 3)

When hydrogen gas is absorbed and stored in the hydrogen storage alloy (71), the vent pipe (47) to the hydrogen storage tank (7) of the opening / closing control device (5) is opened and the others are closed. Then, the ventilation pipe (4) from the generation tank (1) communicates with the hydrogen storage tank (7), and the hydrogen gas is absorbed and stored in the hydrogen storage alloy (71). (See Fig. 4)

As the hydrogen gas utilizing device (8), there are various devices that utilize heat energy, electric energy, etc. in addition to the above. The opening / closing control device (5) is opened to the utilization device (8) side to open a ventilation pipe. When the hydrogen gas is sent to (48) and the pressure increases, the switch (51) is opened or opened. (See Figs. 4 and 5)

When the amount of hydrogen gas used by the hydrogen gas utilization device (8) is equal to or greater than the amount generated in the generation tank (1), the hydrogen gas stored in the hydrogen storage tank (7) is taken out and refilled. I just need. In this case, the pressure control function of the opening / closing control device (5) opens the ventilation pipe (46) to the fuel cell (6) side to open and sends hydrogen gas to the ventilation pipe (46). When vented to the cathode, the air inlet on the anode side (6
2) is opened and oxygen in the atmosphere is supplied, so that the fuel cell (6) generates power. The power (64) is turned on to turn on the heating device (72) of the hydrogen storage tank (7) through the converter (65) and pressurize or heat to release hydrogen gas from the hydrogen storage alloy (71). As a result, the shortage of the amount of hydrogen gas generated in the generation tank (1) can be compensated. This means that all the ventilation pipes (46, 47, 48) connected to the opening and closing control device (5) are opened. (See Fig. 4)

The hydrogen storage alloy (71) is currently being studied in various fields, but the conditions for adsorption and release vary considerably depending on the material of the alloy and the like. Generally, the speed and amount of adsorption and desorption vary depending on the pressure and temperature, so that the pressure and temperature may be set according to the conditions of the hydrogen storage alloy to be used. Further, depending on the type of the storage alloy, it is necessary to pressurize or heat when storing, but it is preferable to operate according to the conditions of storage and release.

The fuel cell (6) is a clean energy conversion device for converting chemical energy into electric energy. Platinum or palladium is used as a catalyst for the electrode on the hydrogen gas side, and silver or nickel is used for a catalyst for the electrode on the oxygen gas side. In order to make the energy conversion effect effective, research on catalysts, increasing the surface area of the electrode, and increasing the reaction temperature are issues. The generated electricity is supplied to equipment for use at a voltage and current that can be easily used by the converter.

The electrolytic solution (12) is electrochemically decomposed by the potential difference generated at the electrode (11), and the electrolytic solution (12)
In addition, hydrogen gas is released and taken out as hydrogen gas. In addition, the electrolytic solution and the electrode generate hydrogen gas by a chemical reaction, and the metal on the cathode side of the electrode (11) becomes a metal salt and the electrolytic solution ( Since it melts and precipitates in 12), the bottom surface (17) of the generating tank (1) is inclined toward the waste liquid discharge plug (16) so that it can be taken out. Furthermore, since the bottom of the generating tank (17) is unstable when it is installed if it is inclined, it is mounted on the mounting table (101) for stability. (See FIGS. 8 and 9)

When the generation amount of hydrogen gas is controlled to be stopped or suppressed, the electrolytic solution (12) is transferred from the generating tank (1) to the electrolytic reserve tank (2), and is stored while storing the electrolytic solution (1).
Since the metal salt dissolved in 2) precipitates, a waste liquid discharge plug (26) is provided on the side wall near the bottom surface (24) of the electrolytic solution preparatory tank or on the liquid passage pipe (3), and is opened and discharged as necessary. Good.
(See Figures 1, 2, 4, and 8)

When the pressure in the generating tank (1) decreases, the electrolyte (12) stored in the electrolyte preserving tank (2) passes through the liquid pipe (3).
When returning to the generation tank (1) through the electrolyte reserve tank (2)
So that air can be sucked into the inside of the electrolyte reserve tank (2
It is preferable to open the intake / exhaust cock (25) provided in 4). It is more reliable to open the plug in conjunction with the opening / closing control device (5) and the ventilation pipe (4) to the utilization tool (8), the fuel cell (6) and the hydrogen storage alloy (7). (See Figs. 3 and 4)

The electrolytic solution (12) in the generating tank (1) is discharged as a waste liquid or evaporates and gradually decreases in volume. In addition, since the concentration of the electrolytic solution (12) decreases due to the generation of hydrogen gas, the electrolytic solution (12) becomes fresh. It is necessary to replenish the electrolyte to prevent the concentration from decreasing. Electrolysis facing the replenisher passage (93), which is open at the top of the level of the electrolyte (12) in the generating tank (1) and has a connection part (97) and a replenisher tap (96). Replenisher (9
The electrolyte replenishment tank (9) containing 2) is positioned higher than the level of the electrolyte in the generation tank (1). (FIG. 11
reference)

The opening of the replenisher liquid passage pipe (93) is provided at the water level of the electrolyte solution (12) in the generating tank (1), which is exactly the prescribed liquid level. When the internal pressure becomes so high that the electrolytic solution (1) is transferred to the electrolytic solution preparatory tank (2), the replenisher opening / closing plug (92) is used to prevent the electrolytic replenisher (92) from flowing into the generating tank (1). 96)
Has a pressure-operated structure so as to be closed by pressure.
(See Fig. 11)

The electrolytic solution replenishing tank (9) containing the electrolytic replenishing solution (92) is connected to the replenishing solution opening / closing stopper (9) attached to the generating tank (1).
The connection part (9) following the replenisher flow pipe (93) provided with 6)
When the opening of the generating tank (1) of the replenisher liquid passage pipe (93) falls below the level of the electrolytic solution (12), the generating tank is mounted. The hydrogen gas in (1) enters the electrolyte replenishing tank (9) via the replenishing solution passage pipe (93), and the electrolytic replenishing solution (92) is generated until the opening of the replenishing solution passage pipe (93) is closed. The electrolyte is replenished by flowing into the tank (1). (See Fig. 11)

A gas-liquid separator (41) is provided between the vent pipe (4) provided above the hydrogen gas generating tank (1) and the opening / closing control device (5) to provide an electrolyte (12). Is a liquid and is not sent to the vent pipe (4). (See FIG. 11) [Effect of the Invention]

As described above, the method and apparatus for producing hydrogen gas according to the present invention is a small-sized and easy-to-operate apparatus for producing extremely clean and high-energy hydrogen gas as required without using external energy. It is. Hydrogen gas is
Even if it is burned as fuel, it is a chemical that reacts with oxygen in the atmosphere to become water, and has no risk of polluting the environment.

Although there are various methods for producing hydrogen gas, in the present invention, an extremely high purity hydrogen gas is obtained by electrochemically decomposing an electrolytic solution by a potential difference generated between closely dissimilar metals. In addition, the hydrogen storage alloy does not deteriorate when storing the hydrogen gas, and the quality of the hydrogen storage alloy can be maintained and used for a long time.

Since the hydrogen gas coming out of the generating tank is stored by being adsorbed on the hydrogen storage alloy, the amount of hydrogen gas stored in the apparatus is limited only in the upper space of the generating tank and the ventilation pipe, and there is little danger and small size. It is a safe device.

In the apparatus of the present invention, a necessary amount of hydrogen gas is produced and used when needed. The generated hydrogen gas is stored in a hydrogen storage alloy, and when it is not necessary to generate the hydrogen gas, an electrode or an electrode is used. This is a resource-saving device that minimizes the consumption of the electrolyte and ensures a stable amount at any time, and performs all these operations by self-control.

When the generated hydrogen gas is connected to a utilization device such as a combustion device or a power generation turbine, various types of energy conversion can be performed and applied products can be produced by utilizing the characteristics of the hydrogen gas. This device is the starting point of these applied products and facilitates future product development.

[Brief description of the drawings]

FIG. 1 is a schematic conceptual diagram according to an embodiment of the present invention.

FIG. 2 is a schematic diagram of an integrated type of a generating tank and an electrolytic solution tank according to an embodiment of the present invention.

FIG. 3 is an enlarged schematic diagram of FIG. 2 according to an embodiment of the present invention.

FIG. 4 is a schematic conceptual diagram of another example of FIG. 1 according to the embodiment of the present invention.

FIG. 5 is a perspective view of an electrode according to the embodiment of the present invention.

FIG. 6 is an enlarged cross-sectional view of an electrode according to the embodiment of the present invention.

FIG. 7 is a schematic cross-sectional view of the inside of the generating tank according to the embodiment of the present invention.

8 is a cross-sectional view of another example of FIG. 2 according to the embodiment of the present invention.

FIG. 9 is a perspective view of the generating tank of FIG. 9 according to the embodiment of the present invention.

FIG. 10 is a sectional view of an example of packing according to the embodiment of the present invention.

FIG. 11 is a schematic sectional view of an electrolytic replenisher according to an embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Generation tank, 11 ... Electrode, 12 ... Electrolyte, 13 ... Generation tank top lid, 16 ... Waste liquid discharge plug, 17 ... Generation tank bottom surface, 18 ... Generation tank upper surface, 101 ... Placement table, 2 ... Electrolyte reserve tank, 23 ...
Electrolyte reserve tank, 24: bottom of electrolyte reserve tank, 25: suction / exhaust plug, 26: drainage exhaust plug, 27: valve for closing liquid passage pipe, 3: liquid passage pipe, 4 ... ventilation pipe, 41: gas-liquid separator 46, fuel cell vent pipe, 47, hydrogen storage alloy vent pipe, 48, hydrogen gas utilization instrument vent pipe, 5 opening / closing control device, 6 ... fuel cell, 61 ... fuel cell electrolyte, 62 ... air inlet, 63 ... Fuel cell electrode, 64 switch, 65 converter, 7 hydrogen storage tank, 7
DESCRIPTION OF SYMBOLS 1 ... Hydrogen storage alloy, 72 ... Heating device, 8 ... Hydrogen gas utilization equipment, 9 ... Electrolyte replenishing tank, 92 ... Electrolyte replenishing solution, 93 ... Replenishing solution passage pipe, 96 ... Replenishing solution opening / closing stopper, 97 ... Replenishing solution Connection part, 10 ... Electric appliance, 181, 181 '... Packing,

Claims (6)

[Claims] An electrode made of a dissimilar metal which is in contact with an electrolytic solution which electrochemically decomposes an electrolytic solution to generate hydrogen gas is housed in a generating tank, and the amount of hydrogen gas generated is determined between the electrode and the electrolytic solution. A method for producing hydrogen gas which is controlled by a change in the contact area. 2. A hydrogen gas production apparatus for producing hydrogen gas by the hydrogen gas production method according to claim 1. 3. A method for producing hydrogen gas, wherein an electrolytic solution in a generating tank is transferred to and stored in an electrolytic solution preserving tank at the pressure of the generated hydrogen gas to control the amount of hydrogen gas generated. 4. A hydrogen gas producing apparatus for producing hydrogen gas by the hydrogen gas producing method according to claim 3. 5. A generation tank, a fuel cell that generates power by a chemical reaction between hydrogen gas generated in the generation tank and oxygen in the atmosphere,
A hydrogen gas producing apparatus including a hydrogen storage tank for storing a hydrogen storage alloy for storing hydrogen gas generated in a generation tank. 6. A replenisher opening / closing plug and a replenisher liquid passage pipe are connected to the bottom surface of a sealed electrolyte replenisher tank, which is positioned higher than the generator tank, and is opened to a specified water level of the generator tank. Hydrogen gas production equipment.