JP2009155190A - Hydrogen station - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hydrogen station which is easy to handle and inexpensive. <P>SOLUTION: The hydrogen station comprises a hydrogen generating apparatus 50, waterworks 40 as water supply equipment for supplying water to the hydrogen generating apparatus 50, a roll body supply means 45 as additive metal element supply equipment for supplying an additive metal element constituting a hydrogen generation composition to the hydrogen generating apparatus 50, a tank 55 for storing hydrogen generated in the hydrogen generating apparatus 50, and a booster pump 60 for drawing out hydrogen stored in the tank 55 and outputting it after boosting to a predetermined pressure. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a hydrogen station for producing, storing and supplying hydrogen, for example for fuel cell vehicles, hydrogen vehicles and hybrid vehicles.

  In recent years, from the viewpoint of preventing global warming, research and development of vehicles using hydrogen such as fuel cell vehicles and hydrogen vehicles has been actively conducted, and hydrogen is produced and stored in response to this, Research and development of hydrogen stations for supply has also become active. For example, several hydrogen stations for producing, storing, and supplying high-purity hydrogen as a fuel gas to be supplied to a fuel cell mounted on a fuel cell vehicle have already been disclosed (for example, patents). Reference 1). The hydrogen station 1 includes a water electrolysis apparatus 2, hydrogen storage tanks 31 to 33 each having a hydrogen storage material capable of storing and releasing hydrogen produced by the water electrolysis apparatus 2, and a hydrogen storage process. Heating means 4 for heating the hydrogen storage tank 32 after hydrogen storage by heat generated by the hydrogen storage material of a certain hydrogen storage tank 31 and increasing the internal pressure of the tank 32 is provided. If the high-purity hydrogen produced in the hydrogen station 1 is used for the fuel gas, the fuel reformer and the accompanying device are not required on the fuel cell vehicle side.

  Also known is a system in which hydrogen produced in an off-site hydrogen factory is stored in a container, and the hydrogen stored in the container is transported to a hydrogen station by a truck and stored in a high-pressure tank in the hydrogen station.

  However, the technique and the method disclosed in Patent Document 1 have the following problems.

  That is, if the hydrogen station 1 disclosed in Patent Document 1 is used, a fuel reformer and its associated devices are not required on the fuel cell vehicle side, but a large amount of electric energy is supplied because the water electrolysis device 2 is used. There is a problem that not only equipment is required, but also heating means 4 for increasing the internal pressure of the tank in which hydrogen is stored is required. In addition, a composite long lightweight container is also required as a tank.

In the above method, hydrogen is produced at an off-site hydrogen factory, and the hydrogen is transported to the hydrogen station by truck, so there are various costs such as transportation costs, container storage, and re-storage in the high-pressure tank in the hydrogen station. There is a cost. In addition, the storage amount of laws and regulations (for the required storage capacity 3000Nm ^3, in the residential areas 30Nm ^3, 70Nm ³ in the commercial area) also subject to constraints. Therefore, when constructing a hydrogen station in such a place, there is a problem in that the hydrogen must be transported frequently, and the cost increases further.
JP 2002-161998 A

  An object of the present invention is to provide a hydrogen station that is easy to handle and inexpensive.

  The invention according to claim 1 of the present invention comprises a hydrogen generator that generates hydrogen by a catalytic reaction between a hydrogen generating composition and water, and water and the hydrogen generating composition for the hydrogen generator. Water supply facility for supplying each additional metal element, additional metal element supply facility, a tank for storing hydrogen generated in the hydrogen generator, and taking out the hydrogen stored in the tank and increasing the pressure to a predetermined pressure And a booster pump for outputting the hydrogen station.

  The invention according to claim 2 is the invention according to claim 1, wherein the composition for generating hydrogen is a first metal containing tin and gallium or a second metal containing silver and gallium, Alternatively, it is characterized by comprising a third metal made of gallium and at least one metal element selected from the group consisting of metal elements having a standard electrode potential lower than that of gallium.

The invention according to claim 3 is the invention according to claim 2, wherein the first metal is W% of tin (meaning of mass%, hereinafter the same), X% of gallium,
The second metal is Y% silver and Z% gallium, and the first or second metal satisfies the following formulas (1) to (6),
The total amount of at least one metal element selected from the group consisting of metal elements having a standard electrode potential lower than that of gallium is 0.1% or more based on the first or second metal. Is.
0 <W ≦ 96 (1)
4 ≦ X <100 (2)
X = 100−W (3)
0 <Y ≦ 55 (4)
45 ≦ Z <100 (5)
Z = 100−Y (6)

  The invention according to claim 4 is the invention according to claim 2 or 3, wherein at least one metal element selected from the group consisting of metal elements having a standard electrode potential lower than gallium is at least aluminum or magnesium. It is any one kind.

  According to a fifth aspect of the present invention, in the first to fourth aspects of the invention, the predetermined pressure is 30 MPa or more.

  The hydrogen station according to the present invention does not require a large electrical energy supply facility, heating means or a composite long and lightweight container, and it is not necessary to transport the hydrogen to the hydrogen station by truck. An easy and inexpensive hydrogen station can be realized.

  Hereinafter, embodiments of the present invention will be described.

  A hydrogen station according to the present invention includes a hydrogen generator that generates hydrogen by a contact reaction between a hydrogen generating composition and water, and water and an additive metal element that constitutes the hydrogen generating composition for the hydrogen generating apparatus. A water supply facility for supplying each of them, an additional metal element supply facility, a tank for storing hydrogen generated in the hydrogen generator, and the hydrogen stored in the tank is taken out to a predetermined pressure and output. And a booster pump.

  Of the technologies that form the core of the hydrogen station of the present invention, the composition for hydrogen generation, which is the most basic component, will be described first. The composition for hydrogen generation includes a first metal containing tin and gallium, a second metal containing silver and gallium, or a third metal made of gallium, and a standard electrode potential lower than that of gallium. And at least one metal element selected from the group consisting of metal elements.

The first metal is W% tin (meaning mass%, hereinafter the same), X% gallium, and the second metal is Y% silver and Z% gallium, The first or second metal satisfies the following formulas (1) to (6),
The total amount of at least one metal element selected from the group consisting of metal elements having a standard electrode potential lower than that of gallium is preferably 0.1% or more based on the first or second metal.
0 <W ≦ 96 (1)
4 ≦ X <100 (2)
X = 100−W (3)
0 <Y ≦ 55 (4)
45 ≦ Z <100 (5)
Z = 100−Y (6)

Here, aluminum, magnesium and zinc, which are metal elements whose standard electrode potential is lower than that of gallium, are dissolved by acid, and aluminum, zinc and silicon are dissolved by alkali to generate hydrogen. However, these simple metal elements hardly react with neutral water. This is because the concentration of hydrogen ions contained in neutral water is low and an oxide film (or hydroxide film) is formed on the surface of each single metal element to protect the inside.

  On the other hand, the composition for generating hydrogen generates hydrogen even with neutral water. The mechanism of this hydrogen generation is considered as follows.

  That is, gallium is stable to acidic water up to about pH 3, and is hardly consumed. Moreover, tin is stable to strongly acidic water having a pH of about 1 to 2, and is hardly consumed. Furthermore, since silver has a higher standard electrode potential than hydrogen, it is not consumed even by ordinary acids and alkalis.

In addition, a standard electrode potential of gallium (−0...) Is added to a metal (hereinafter referred to as a tin-gallium metal) containing tin-gallium that is stable to water in the above-described proportions.
56 V) (naturally lower than tin (−0.1375 V)), the added metal element selectively reacts with water. In addition, the oxide film (or hydroxide film) formed on the surface of the additive metal element by reaction with water is a normal dense oxide that is generated on the surface when the additive metal element is used alone. It is estimated that it becomes a sparse oxide film with many defects, not a film. Furthermore, this sparse oxide film is easily destroyed by a volume change due to the selective consumption of the additive metal element, and is peeled off by the generated hydrogen bubbles, so that the internal additive metal element and water are easily separated. Since the reaction proceeds by contact, continuously, and
It is considered that hydrogen is generated efficiently. Here, the reason why the tin content in the tin-gallium metal is limited to 96% by mass or less is that when the tin content exceeds 96% by mass, the hydrogen generation rate rapidly decreases. The reason why the hydrogen generation rate rapidly decreases as the tin content increases as described above is unknown at present, but it is also possible that the structure of the tin-gallium metal changes. The standard electrode potential is gallium (-0.56V)
Lower metal elements include aluminum (−1.66 V), magnesium (−2.37).
V), silicon (−0.86 V), and zinc (−0.7628 V) can be illustrated as preferable because they are relatively inexpensive and easily available. Moreover, the said additional metal element added to the said tin- gallium type metal may be added individually by 1 type, and may add 2 or more types together. In addition, the amount added is to exert the hydrogen generation effect by the above estimation mechanism,
The total amount is 0.1% by mass or more. Further, the additive metal element is not necessarily limited to a high-purity element. For example, in the case of aluminum, an industrial aluminum alloy may be used, and the hydrogen generating composition includes an industrial aluminum alloy. Inevitable impurities such as Fe and Ti may be included. Furthermore, scraps and recycled products of these metals can be used. Moreover, although the upper limit of addition amount is not specifically limited, since even if it adds excessively, the hydrogen generation | occurence | production speed | velocity tends to become slow gradually, it is more preferable to set it as 20 mass% or less, Furthermore, it is 10 mass% or less. The hydrogen generating composition having the tin-gallium metal as the first metal and the additive metal element (Japanese Patent Application No. 2007-88801, which is incorporated herein by reference) (Hereinafter referred to as a composition for generating hydrogen comprising a tin-gallium metal)) is a composition for generating hydrogen used in a hydrogen generator installed in a hydrogen station according to the present invention. Suitable as a thing.

  This is because when the above tin-gallium metal is used and the above metal is used as an additive metal element, the above-mentioned additive metal element is easily brought into contact with the above tin-gallium metal, and the above tin-gallium metal is easily used. This is because it dissolves and diffuses in the metal. Accordingly, tin-gallium metal is stored in the hydrogen generator installed in the hydrogen station, and the additive metal constituting the composition for hydrogen generation is added to the tin-gallium metal from an additive metal element supply facility. A composition for hydrogen generation can be easily prepared by supplying and contacting elements. Similarly, pure hydrogen can be easily generated simply by bringing this hydrogen generating composition into contact with water supplemented and supplied from a water supply facility. By repeating this, hydrogen can be continuously generated. Therefore, the hydrogen generated in this way is stored in a tank (it is not necessary to be a special high-pressure vessel) in the capacity specified by the storage amount regulations for each region, and is stored on demand from this tank when necessary. Hydrogen can be taken out, boosted to a predetermined pressure (for example, 35 MPa) with a booster pump, and output. Thus, in the hydrogen station according to the present invention, there is no need for a large electrical energy supply facility, such as a case where hydrogen is obtained by a water electrolysis apparatus, a heating means or a composite long lightweight container, and hydrogen is supplied to the hydrogen station. Therefore, it is not necessary to transport it by truck until it is easy to handle and an inexpensive hydrogen station can be realized.

  This hydrogen station is not only used as a hydrogen station for producing, storing and supplying hydrogen for fuel cell vehicles, hydrogen vehicles and hybrid vehicles, but also for equipment and devices that use hydrogen widely. It can also be used as a hydrogen station.

  In addition, particularly in hydrogen stations where large vehicles are frequently used, an intermediate medium for improving the effective area where the hydrogen generating composition and water are in contact with each other so that hydrogen can be generated at a high speed by the hydrogen generator. And a hydrogen generation promoting member having a structure in which at least a part of the surface of the substrate is covered with the hydrogen generation composition comprising the tin-gallium metal. It is more preferable.

  Detailed items of the base constituting the hydrogen generation promoting member will be described below. As the form of the substrate, various forms can be used as long as the surface area can be increased, such as a porous form, a foam form, a net form, or a non-woven form. Various materials such as ceramics, glass, resin, metal that does not react with water and gallium (for example, stainless steel) can be used as the base material.

In addition, a standard electrode potential of gallium (-) is added to a metal (hereinafter referred to as a silver-gallium metal) containing silver and gallium, which are more stable against water than the tin-gallium metal, at a predetermined ratio. When a metal element lower than 0.56 V (of course, lower than silver (+0.8 V)) is added, the added metal element selectively reacts with water. The mechanism of hydrogen generation when this silver-gallium metal is used is the same as that when the tin-gallium metal is used. Therefore, it is considered that hydrogen is generated continuously and efficiently because the additive metal element easily contacts with water and the reaction proceeds. Here, the content of silver in the silver-gallium metal is limited to 55% by mass or less, as in the case of the tin-gallium metal,
This is because when the silver content exceeds 55% by mass, the hydrogen generation rate rapidly decreases. Various metal elements having a standard electrode potential lower than that of gallium can be used. From the viewpoint of the amount of hydrogen generated, and from the viewpoint of being relatively inexpensive and easy to obtain, aluminum, magnesium, aluminum And an alloy of magnesium can be exemplified as a more preferable one. In addition, as in the case of the tin-gallium metal, this additive metal element may be added alone or in combination of two or more. For example, in the case of adding an alloy of aluminum and magnesium, the hydrogen generation rate is higher than that of adding aluminum alone. Also,
The amount added is 0.1% by mass or more in total in order to exert the hydrogen generation effect by the above estimation mechanism. Further, the additive metal element is not necessarily limited to a high-purity element. For example, in the case of aluminum, an industrial aluminum alloy may be used, and the hydrogen generating composition includes an industrial aluminum alloy. Inevitable impurities such as Fe and Ti may be included. Furthermore, scraps and recycled products of these metals can be used. Moreover, although the upper limit of addition amount is not specifically limited, since even if it adds excessively, the hydrogen generation | occurence | production speed | velocity tends to become slow gradually, it is more preferable to set it as 25 mass% or less, Furthermore, it is 20 mass% or less. The composition for hydrogen generation having the silver-gallium metal as the second metal and the additive metal element (Japanese Patent Application No. 2007-, which is incorporated herein by reference)
The composition for generating hydrogen described in No. 259022 (hereinafter referred to as a composition for generating hydrogen comprising a silver-gallium metal) is used in a hydrogen generating apparatus installed in the hydrogen station according to the present invention. It can also be used as a composition. Note that the same effect can be obtained even when a metal substantially composed only of gallium (others are inevitable impurities) is used as the third metal.

Moreover, as the water to be brought into contact with the above-described composition for generating hydrogen comprising a tin-gallium metal or a silver-gallium metal, it is possible to use pure water having a pH of 7 which is completely neutral. Water (inexpensive tap water) is recommended. Therefore, a normal water supply facility can also be used for the water supply facility installed in the hydrogen station according to the present invention.

  Furthermore, in order to accelerate the hydrogen generation reaction, the tin-gallium metal or the silver-gallium metal may be weakly acidic or weakly alkaline so that it does not corrode. Water need not be heated in particular, and may be at room temperature or heated to about 40 ° C.

  An embodiment of the hydrogen station of the present invention will be described below with reference to the drawings.

(Example)
FIG. 1 is a schematic block diagram for explaining a hydrogen station according to an embodiment of the present invention. FIG. 2 is a schematic diagram showing a schematic configuration of a hydrogen generator installed in the hydrogen station of the present invention shown in FIG. (A) is a schematic plan view thereof, (b) is a schematic cross-sectional view taken along the line AA, and FIG. 3 is a schematic view showing a schematic configuration of a hydrogen generation promoting member used in the hydrogen generator shown in FIG. (A) is a schematic plan view thereof, and (b) is an enlarged explanatory view of the A portion thereof.

  In FIG. 1, a hydrogen station 70 supplies a water supply facility 40 as a water supply facility and a roll body 9 wound with an aluminum foil body 8 as an additive metal element supply facility (see FIG. 2 for details). Means 45, a hydrogen generator (see FIG. 2 for details) 50, a tank 55 for storing hydrogen, and for extracting the hydrogen stored in tank 55 to a predetermined pressure and outputting it. A booster pump 60 is provided.

  In addition, tin-gallium metal 1 (see FIG. 2 described later for details) is stored in advance in the hydrogen generator 50, and the roll body 9 is further stored in the hydrogen generator 50 by the roll body supply means 45. In the additional metal element storage container 30 (see FIG. 2 for details). The aluminum foil body 8 is pulled out from the roll body 9 and supplied to the tin-gallium metal 1 side. By contacting the tin-gallium metal 1, the composition for generating hydrogen can be easily prepared. it can. Similarly, pure hydrogen is easily generated simply by bringing the composition for hydrogen generation into contact with water supplemented and supplied from the water supply facility 40. Therefore, the hydrogen generated in this manner is stored in a tank 55 (not required to be a special high-pressure vessel) in a capacity specified by the storage amount regulations for each region, and this tank is stored on demand when necessary. The hydrogen is taken out from 55 and the pressure is raised to a predetermined pressure (for example, the pressure in the high-pressure cylinder 90 in the hydrogen automobile 80 in which the hydrogen engine 85 is mounted: 35 MPa) by the booster pump 60 and output to the hydrogen supply port 95. Thus, a predetermined amount of hydrogen is stored in the high-pressure cylinder 90 in the hydrogen automobile 80. In the present embodiment, the predetermined pressure is set to 35 MPa, but it may be possible to set the pressure to 70 MPa or higher. The booster pump constituting the hydrogen station according to the present invention can be set to any pressure depending on the application.

  In FIG. 2, 1 is the above-mentioned tin-gallium-based metal as the first metal that exhibits a low-viscosity state even at room temperature, 2 is water, 3 is a gallium-based metal containing means, and initially, tin- A common container containing gallium metal 1 and containing water 2 as an upper layer as a water containing means, 4 is a water storage container in which water 2 for replenishment is stored, and 5 is from the water storage container 4 to the upper layer of the common container 3. A first pump for transporting water 2, 6 is a first pump control means for controlling the operation of the first pump 5, and 7 is sealed by a side wall 3 a under the shared container 3 and is rotatably supported. 8 is a foil body of aluminum which is a metal element whose standard electrode potential is lower than that of gallium, 9 is a roll body around which the foil body 8 is wound, 10 is a foil body 8 drawn into the common container 3 by the double roll 7. Inside the contained tin-gallium metal 1 A motor for driving the twin roll 7 for supply, 11 is a motor control means for controlling the drive of the motor 10, and 20 comprises a stainless steel frame 20a and a lattice 20b as a metal that does not react with water or gallium. A hydrogen generation promoting member (see FIG. 3 to be described later in detail) having a network-like substrate 20c having a large surface area and a hydrogen generation composition 20d made of a tin-gallium-based metal supported on the substrate 20c, and 21 is a substrate 20c. , A water supply port provided in the common container 3, 23 generated hydrogen, 24 a hydrogen outlet provided in the common container 3 for taking out the hydrogen 23, and 25 a hydrogen outlet 24. The attached hydrogen sensor, 26 is a signal output from the hydrogen sensor 25, 27 is a reaction by-product provided in the upper layer of the side wall 3a of the shared container 3, and hydroxy acid. Discharge port for discharging the aluminum 28 with water 2, 29 is a tank for storing the aluminum hydroxide 28 and water 2. Further, the above-described hydrogen generating composition 20d made of a tin-gallium metal is a substance that exhibits a low viscosity state as a whole when the foil body 8 is dissolved and diffused in the tin-gallium metal 1.

  As described above, the shared container 3 has both the function of containing the tin-gallium metal 1 as the gallium metal containing means and the function of containing the water 2 as the water containing means. The water supply means includes a water storage container 4, a first pump 5, and a first pump control means 6. The additive metal element supply means includes a twin roll 7, a roll body 9, a motor 10, and a motor control means 11.

  Next, the operation of the hydrogen generator will be described.

First, by starting the motor control means 11 and driving the motor 10, the foil body 8 wound around the roll body 9 is drawn into the shared container 3 by the twin rolls 7 and accommodated in the lower layer of the shared container 3. The tin-gallium metal 1 is supplied. As a result, the hydrogen generating composition 20d having a low viscosity state as a whole is formed. Next, the hydrogen generating composition 20d comes into contact with the water 2 previously stored in the upper layer of the common container 3, whereby the aluminum element diffused in the hydrogen generating composition 20d is oxidized, and the water 2 It melts out as an ion. In exchange for this, hydrogen ions in the water 2 are reduced to generate hydrogen 23.

  Further, as shown in FIG. 3A, the base body 20c has a very large surface area as the base body 20c because the lattice 20b is densely stretched on the frame 20a. Therefore, when the substrate 20c is rotated as shown in FIG. 2B, the hydrogen generating composition 20d is carried on the frame 20a and the lattice 20b as shown in FIG. 3B. As a result, the hydrogen generation promoting member 20 includes the hydrogen generation composition 20d having a large effective surface area. Therefore, when the hydrogen generating composition 20d having a large effective surface area comes into contact with the water 2, a large amount of hydrogen 23 is generated per unit time, and the hydrogen 23 can be produced at an extremely high speed. These hydrogens 23 are taken out from the hydrogen outlet 24 and simultaneously monitored by a hydrogen sensor 25, and an output signal 26 from the hydrogen sensor 25 is rotated by the motor control means 11, the first pump control means 6 and the base 20c. The motor 10 and the first pump 5 are driven so that hydrogen can be generated at a predetermined speed (for example, a speed in response to an on-demand instruction) by feeding back to a speed control means (not shown). The water 2 is supplied to the lower layer and the upper layer in the common container 3, respectively, and the hydrogen generation promoting member 20 is rotated.

  Accordingly, the foil body 8 and the water 2 that are reduced with the generation of hydrogen while generating hydrogen at a predetermined rate are always replenished so as to satisfy the above target. In the composition, the supplied aluminum naturally diffuses toward the contact interface with water due to the concentration gradient of aluminum. Further, by continuing the above reaction, the aluminum hydroxide 28 gradually accumulated in the upper layer of the shared container 3 is discharged from the discharge port 27 to the tank 29 together with the water 2. Further, the water 2 in the tank 29 is returned again to the water storage container 4 for effective use.

In this embodiment, an example in which aluminum is used as a metal element whose standard electrode potential is lower than that of gallium has been described. However, the present invention is not necessarily limited thereto. For example, when using magnesium, an alloy of aluminum and magnesium, silicon, zinc, titanium, lanthanum, and cerium alone, or when using three or more together such as an alloy of aluminum, magnesium, and silicon, an alloy of lanthanum and cerium ( However, since all the metal elements have a lower standard electrode potential than gallium, all these metal elements naturally react selectively with water, so the same effect as the above invention example Is clearly obtained.

Moreover, although the present Example demonstrated the example which used the foil body as a shape of the metallic element whose standard electrode potential is lower than gallium, it is not necessarily specified to this. For example, various things, such as a wire body (a solid wire, a shape in which a pipe is filled with powder), and the like can be used.

Moreover, although the present Example demonstrated the example which used the above-mentioned tin-gallium-type metal 1 as a 1st metal as a substance accommodated in the lower layer in the shared container 3, it does not necessarily identify to this. Absent. For example, the above-described silver-gallium metal as the second metal or gallium as the third metal can be used. In the present embodiment, the example in which only the above-described tin-gallium metal 1 is initially stored in the lower layer in the shared container 3 and then the aluminum foil body 8 is supplied is described. However, the present invention is not limited to this. For example, a hydrogen generation composition 20d in which aluminum elements are mixed from the beginning is accommodated, and aluminum elements may be replenished sequentially.

  In addition, by rotating the base body 20c of the present embodiment, the hydrogen generating composition 20d accommodated in the lower layer of the shared container 3 is agitated. A function of stirring the second metal or the third metal and the additive metal element may be provided. Note that the function of stirring the first metal, the second metal, the third metal, and the additive metal element may be a function of oscillating by ultrasonic vibration or the like to promote diffusion.

  In this embodiment, the additive metal element supply means is composed of a twin roll 7, a roll body 9, a motor 10, and a motor control means 11, and the twin roll 7 is sealed by the side wall 3 a under the shared container 3. However, the present invention is not necessarily limited to this, and the double roll 7 is the side of the shared container 3 that contains the first or second metal and is isolated from water. It only needs to be attached in a sealed state. Further, as the additional metal element supply means, for example, a powder storage container storing powder made of a metal element, and the first or second metal contained in the common container 3 from the powder storage container. An injector mounted on the side of the shared container 3 where the first or second metal is accommodated to be isolated from water and sealed, and an injector control means for controlling the injector Various configurations are possible, such as configuring.

  In the present embodiment, an example of a net-like material having a large surface area made of a stainless steel frame 20a and a lattice 20b has been described as the substrate 20c for supporting the hydrogen generating composition 20d made of tin-gallium metal. However, this is not necessarily specified. For example, various forms such as a porous body, a foam, or a nonwoven fabric can be used for the substrate. Various materials such as ceramics, glass, resin, water, and a metal that does not react with gallium can be used for the material of the substrate.

  In the present embodiment, an example in which the diameter of the circular base body 20c is relatively small has been described. However, the present invention is not necessarily limited thereto. For example, the generation rate of hydrogen 23 can be increased by further increasing the diameter according to the application. Further, by arranging the circular base bodies 20c in a multiple form in the direction of the shaft 21, the generation rate of the hydrogen 23 can be further increased. Such a configuration is particularly effective in a hydrogen station where large vehicles are often used, because the hydrogen generator 50 can generate hydrogen at a high speed. Further, the shape of the base 20c is not limited to a circle.

  In the present embodiment, the example in which the circular base 20c is rotatably supported in the hydrogen generator has been described. However, the present invention is not necessarily limited thereto. For example, it may be installed movably such as a swingable support.

It is a schematic block diagram for demonstrating the hydrogen station of one Example of this invention. It is a schematic diagram which shows schematic structure of the hydrogen generator installed in the hydrogen station of this invention shown in FIG. 1, Comprising: (a) is the schematic top view, (b) is a schematic cross section in the AA line It is. It is a schematic diagram which shows schematic structure of the acceleration | stimulation member for hydrogen generation used with the hydrogen generator shown in FIG. 2, Comprising: (a) is the model top view, (b) is the A section enlarged explanatory drawing.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tin-gallium-type metal 2 Water 3 Shared container 3a, 21a, 23a, 41a, 51a Side wall 4 Water storage container 5 1st pump 6 1st pump control means 7 Twin roll 8 Foil body 9 Roll body 10 Motor 11 Motor control Means 20 Hydrogen generation promoting member 20a Frame 20b Lattice 20c Base 20d Hydrogen generation composition 21 Axis 22 Water supply port 23 Hydrogen 24 Hydrogen outlet 25 Hydrogen sensor 26 Output signal 27 Discharge port 28 Aluminum hydroxide 29 Tank 30 Addition metal Element storage container 40 Water supply equipment 45 Roll body supply means 50 Hydrogen generator 55 Tank 60 Booster pump 70 Hydrogen station 80 Hydrogen car 85 Hydrogen engine 90 High pressure cylinder 95 Hydrogen supply port

Claims (5)

  A hydrogen generator for generating hydrogen by a contact reaction between a hydrogen generating composition and water, and a water supply facility for supplying water and an additional metal element constituting the hydrogen generating composition to the hydrogen generating apparatus. And an additional metal element supply facility, a tank for storing the hydrogen generated in the hydrogen generator, and a booster pump for extracting the hydrogen stored in the tank to a predetermined pressure and outputting the same. This is a hydrogen station.   The composition for hydrogen generation includes a first metal containing tin and gallium, a second metal containing silver and gallium, or a third metal made of gallium, and a standard electrode potential lower than that of gallium. 2. The hydrogen station according to claim 1, wherein the hydrogen station is composed of at least one metal element selected from the group consisting of metal elements. The first metal is W% tin (meaning mass%, the same shall apply hereinafter), X% gallium,
The second metal is Y% silver and Z% gallium, and the first or second metal satisfies the following formulas (1) to (6),
3. The total amount of at least one metal element selected from the group consisting of metal elements whose standard electrode potential is lower than that of gallium is 0.1% or more based on the first or second metal. Hydrogen station.
0 <W ≦ 96 (1)
4 ≦ X <100 (2)
X = 100−W (3)
0 <Y ≦ 55 (4)
45 ≦ Z <100 (5)
Z = 100−Y (6) The hydrogen station according to claim 2 or 3, wherein at least one metal element selected from the group consisting of metal elements having a standard electrode potential lower than that of gallium is at least one of aluminum and magnesium.   The hydrogen station according to claim 1, wherein the predetermined pressure is 30 MPa or more.

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