JP2015082973A - Hydrogen production system, and electric power generator using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hydrogen production system capable of efficiently obtaining hydrogen by utilizing photosynthetic reaction and nitrogen fixation reaction of a photosynthetic microorganism strain, and an efficient electric power generator using obtained hydrogen or culture solution.SOLUTION: A hydrogen production system comprises: a plurality of containers to which culture solution containing photosynthetic microorganism strain is supplied; irradiation means of light; means for generating hydrogen by photosynthetic reaction and nitrogen fixation reaction to obtain the hydrogen; and means for obtaining culture solution containing amino acid which is generated by the nitrogen fixation reaction of the photosynthetic microorganism strain. An electric power generator utilizes hydrogen obtained by the hydrogen production system or an electrolysis tank including culture solution.

Description

  The present invention relates to a system for producing hydrogen produced by photosynthesis and metabolism by a photosynthetic microorganism and a power generation apparatus using the same.

  In recent years, expectations for hydrogen energy as a new energy are increasing. In particular, there is a great need for hydrogen as a fuel for fuel cells for automobiles and households. Automobiles using fuel cells run on a motor using electric energy generated by a chemical reaction between hydrogen and oxygen in a fuel cell. Compared to the energy efficiency of conventional gasoline internal combustion engine vehicles (15-20%), automobiles using fuel cells achieve twice as much (30% or more) of energy efficiency and have a low output range. But high efficiency can be maintained. Also, there is no emission of harmful air pollutants such as carbon dioxide.

  Therefore, an efficient production method and production apparatus for hydrogen replenished to the fuel cell is desired. Conventionally, as a method for producing hydrogen, a method for producing hydrogen by electrolyzing an electrolytic solution in an electrolysis tank is known. For example, Patent Document 1 discloses an electric energy generation system by electrolysis. According to the system, it is described that the required power can be reduced and no hydrogen leak occurs.

As another method, there is a so-called hydrogen power generation method using biofuel. This is a method of efficiently using hydrogen produced by photosynthesis and metabolism of photosynthetic microorganisms (bacteria, algae, etc.). For example, Patent Document 2 describes a biofuel cell. Among the photosynthetic microorganisms, cyanobacteria (Cyanobacteria) assimilate carbon dioxide by photosynthesis, produce organic matter (CH ₂ O), and generate oxygen. Furthermore, in order to generate hydrogen by nitrogenase reaction, fuel cells using cyanobacteria and hydrogen power generators have attracted attention in recent years.

JP 2005-113246 A JP 2006-190502 A

  As described above, methods for producing hydrogen include electrolysis using an electrolysis tank, and hydrogen generation using cyanobacteria. In the method based on electrolysis described in Patent Document 1, the required electric power is reduced by the electrolytic solution pressurizing means, but in order to reduce the electric power, an electrolytic solution that generates a large amount of hydrogen should be used. Is more desirable.

  Moreover, although the biofuel cell described in Patent Document 2 uses cyanobacteria, the photosynthesis and metabolism are performed using a light irradiation tank and a redox reaction tank, respectively, so that the structure of the apparatus is complicated. . Patent Document 2 is an invention related to a biofuel cell, and is not related to a hydrogen production technique.

  An object of the present invention is to provide a hydrogen production system capable of acquiring hydrogen more easily and efficiently, and to provide an efficient power generation apparatus using the hydrogen or culture solution obtained thereby.

(1) The invention according to claim 1 generates hydrogen by a plurality of containers supplied with a culture solution containing a photosynthetic microorganism strain, a light irradiation means, a photosynthesis reaction and a nitrogen fixation reaction, A hydrogen production system comprising: means for obtaining; and means for obtaining a culture solution containing an amino acid produced by the nitrogen fixation reaction of the photosynthetic microorganism strain.
(2) The invention according to claim 2 is the hydrogen production system according to claim 1, wherein the photosynthetic microorganism strain is cyanobacteria.
(3) The invention according to claim 3 is the hydrogen production system according to claim 1 or 2, wherein the photosynthetic microorganism strain in the first container and a part of the culture solution are transferred to the second container, It has a means for repeating the photosynthesis reaction and the nitrogen fixation reaction.
(4) According to the invention described in claim 4, the high-pressure tank that stores the hydrogen generated by the hydrogen production system according to any one of claims 1 to 3, a chemical reaction between the hydrogen and oxygen. A fuel cell for generating electricity, a DC-DC converter for converting an output voltage of the fuel cell, a storage battery for storing DC power output from the fuel cell, a charge controller for controlling charge / discharge of the storage battery, and the storage battery And an inverter that converts the output DC voltage into an AC voltage.
(5) The invention according to claim 5 is the power generation apparatus according to claim 4, wherein the high-pressure tank is made of a silicon alloy in which silicon dioxide is synthesized by combustion synthesis.
(6) The invention according to claim 6 is an electrolysis tank to which a culture solution containing the amino acid produced by the hydrogen production system according to any one of claims 1 to 3 is supplied, and the electrolysis tank Output from the fuel cell, an external power source for applying a voltage to the fuel cell, a fuel cell for generating electricity by chemically reacting hydrogen and oxygen generated from the electrolysis tank, a DC-DC converter for converting the output voltage of the fuel cell, and the fuel cell And a charge controller that controls charging / discharging of the storage battery, and an inverter that converts a DC voltage output from the storage battery into an AC voltage.
(7) The invention according to claim 7 is the power generation device according to claim 6, wherein the concentration of the decomposition solution containing the amino acid in the electrolysis tank is 0.4 pH or more and 3.4 pH or less. Features.
(8) The invention according to claim 8 is the power generation apparatus according to claim 6 or 7, wherein the decomposition solution containing the amino acid in the electrolysis tank is in a jelly form.
(9) The invention according to claim 9 is the power generation device according to any one of claims 6 to 8, wherein multi-walled carbon nanotubes are used for the electrolysis electrode of the electrolysis tank. It is characterized by.
(10) The invention according to claim 10 is the power generation apparatus according to any one of claims 6 to 9, wherein the external power source is the storage battery.

  The hydrogen production system of the present invention can efficiently acquire hydrogen, and can provide an efficient power generation apparatus using the acquired hydrogen or culture solution.

It is explanatory drawing which shows the structure of the hydrogen production system which is one Example of this invention. It is a block diagram which shows the whole structure of the electric power generating apparatus using the hydrogen of the hydrogen production system shown in FIG. It is a block diagram which shows the whole structure of the electric power generating apparatus using the culture solution of the hydrogen production system shown in FIG.

  Embodiments of the present invention (hereinafter referred to as “examples”) will be described below with reference to the drawings. In the following drawings, common parts are denoted by the same reference numerals, and duplicate descriptions for the same reference numerals are omitted.

  FIG. 1 is an explanatory diagram showing a configuration of a hydrogen production system 100 according to an embodiment of the present invention. The hydrogen production system 100 includes a culture unit 160 including a plurality of containers 110 to which a culture solution containing a photosynthetic microorganism strain is supplied. Cyanobacteria are used as the photosynthetic microorganism strain. In this embodiment, as shown in FIG. 1, three containers 110 are used as one culture unit 160, and two culture units 160 are installed on one unit, and each unit includes a water supply tank 130 and a management device 140. Is arranged. Any number of containers 110 and one culture unit may be installed in one culture unit 160 and one culture unit. Further, in this embodiment, the hydrogen production system 100 in which two such tables are installed is shown, but any number of tables may be installed.

  The three containers 110 are fixed by a fixed frame 150 and a bottom surface that supports the bottom of the container 110, and each is connected by a water supply tank 130 and a water supply hose (not shown). Moreover, the solvent house surrounding the hydrogen production system 100 of the present invention is assumed to be a glass house that is entirely made of glass, and is configured to be able to transmit sunlight and use it throughout the day.

  Similarly, the container 110 is preferably formed of Pyrex (registered trademark) glass or the like that is transparent to the entire surface and has heat resistance. The shape of the container 110 of the present embodiment is a spherical shape so as to transmit light uniformly, but may be a cube or the like. The size of the container 110 is, for example, a sphere having a diameter of 40 cm. It is preferable that the bottom surface and the fixed frame 150 are formed of stainless steel (for example, SUS306) which is not easily rusted. The size of the fixed frame 150 is, for example, 50 cm in length, 50 cm in width, and 200 cm in height so that the three containers 110 can be fixed.

  In the present embodiment, a light 120 (fluorescent lamp) that irradiates light is further installed in the vicinity of each container 110 of the fixed frame 150, and light can be irradiated even when sunlight is not available. The light 120 may be installed in another part (for example, the inner wall surface of a glass house) instead of the fixed frame 150.

  Nutrient salts (phosphoric acid, calcium, etc.), carbon dioxide, nitrogen and water are required for the growth (growth) of cyanobacteria in the container 110. In this embodiment, water is supplied from a water supply tank 130 to a container, cyanobacteria and nutrient salts are added to the container supplied with water to create a culture solution, and cyanobacteria are grown using carbon dioxide and nitrogen in the air. To do. A carbon dioxide cylinder may be used for supplying carbon dioxide. A temperature control device in the management device 150 controls the room temperature. The rate of photosynthesis depends on the room temperature, and also depends on the amount of carbon dioxide and the intensity of the irradiated light. It may be set manually so that the room temperature is within a predetermined range (for example, 20 ° C. to 40 ° C.), or a carbon dioxide measuring device or a light intensity measuring device is installed in the management device 150. Alternatively, it may be controlled by a computer so that the optimum temperature is automatically reached.

Cyanobacteria generate oxygen by photosynthesis to produce organic matter (CH ₂ O). Furthermore, the nitrogenase reaction of cyanobacteria causes nitrogen fixation to convert nitrogen molecules into ammonia, and hydrogen is generated as a byproduct. In this embodiment, the generated hydrogen is obtained.

  Since the nitrogenase reaction occurs without light irradiation, a photosynthesis reaction may be caused when sunlight is irradiated, and a nitrogenase reaction may be caused when sunlight is not irradiated. In this case, it is not necessary to turn on the light 120, and the power saving effect is higher.

The fixed nitrogen passes through ammonia, becomes glutamine, is sent to surrounding vegetative cells, and is used for the growth of cyanobacterial cells. Therefore, nutrient salts (phosphoric acid, calcium, etc.) are not necessary during the hydrogen production period, and carbon dioxide (CO ₂ ) is used cyclically, so it is a labor-saving hydrogen that has a low impact on the environment. Production is possible. In this example, in addition to acquiring hydrogen, a culture solution containing an amino acid (glutamine) generated by a nitrogen fixation reaction is acquired.

  As a method of acquiring hydrogen, each container 110 is enclosed by a flexible plastic bag, hydrogen is acquired, compressed and stored in a tank 260 (see FIG. 2), a lid and a hose, etc. in the container 110 itself. There is a method of attaching a gas flow path, acquiring hydrogen, compressing it, and storing it in the high-pressure tank 260. In this embodiment, the container 110 itself is provided with a lid and a gas flow path to acquire hydrogen, compress it, and put it into the high-pressure tank 260 (not shown). In the present embodiment, four culture units 160 including three containers 110 are installed as described above, and a large amount of hydrogen can be simultaneously acquired from a total of twelve containers 110. Specifically, using one culture unit 160 for one week, a 50-liter high-pressure tank 260 can be filled with hydrogen at a pressure of 800 to 900 atmospheres. If four culture units 160 are used simultaneously as shown in FIG. 1, high-pressure hydrogen can be filled into a 50-liter high-pressure tank 260 in about two days, which is efficient. If such a high-pressure tank 260 is mounted and used in a fuel cell vehicle, it is possible to travel about 600 km.

  The high-pressure tank 260 is, for example, a box type or a cylindrical type (including both end plates) in order to reduce hydrogen leakage, and a silicon alloy is used as the material. A silicon alloy with a 2 mm stainless steel plate or a stainless steel round bar 5 mm knitted into a 5 mm square is filled and inserted into a 50 mm thickness in the silicon alloy. If the silicon alloy is 5cm thick, the weight is 133kg. If stainless steel is added, it is about 200kg, which is difficult to use. However, if the silicon alloy is only 1cm thick, it is about 27kg. Is possible.

In particular, a silicon alloy in which silicon dioxide (SiO ₂ ) is combusted and compounded as a reinforcing filler is preferable. In this example, the silicon alloy with a weight of 32 g has a high temperature strength three times that of iron, strength twice that of iron, heat resistance four times that of iron, durability and friction resistance twice that of iron, and corrosion resistance of iron. 4 times higher than iron, in terms of strength, heat resistance and durability. Furthermore, the weight is 40% of iron, lighter than iron, and the specific gravity is 3.2. Further, in terms of manufacturing, there are advantages that the manufacturing cost is low, the amount of hazardous waste is small, and the mass production is possible as steel.

  Next, a method for obtaining a culture solution containing an amino acid produced by the nitrogen fixation reaction described above will be described. Nitrogen fixed by the nitrogenase reaction of cyanobacteria passes through ammonia and becomes glutamine. And glutamine is sent to the surrounding vegetative cells of the cyanobacteria through the culture solution, and the cyanobacteria are propagated by being used for cell growth. By transferring a portion of the cyanobacteria grown in the first container to the second container 110 together with the culture solution, the amount of cyanobacteria in the second container 110 is increased. By repeating the transfer of the whole culture solution to another container 110, a culture solution having a high concentration of amino acids such as glutamine (ie, hydrogen ion concentration) can be obtained. Acquire the high concentration culture solution. Specific numerical values of the hydrogen ion concentration (pH) will be described later.

  In this embodiment, for example, a part of cyanobacteria is transferred from the uppermost container 100 (first container) of the culture unit 160 to the lower container 110 (second container) together with the culture solution, and further grown cyano. Part of the bacteria is transferred to the bottom container 110 together with the culture solution. By doing in this way, it can be easily understood that the culture solution in the lowermost container 110 is the culture solution having the highest cyanobacterial concentration, and a culture solution containing a high concentration of amino acids can be obtained.

Since this culture solution is obtained for the purpose of putting it in an electrolysis solution in an electrolysis tank 210 (see FIG. 3) described later, the amount to be obtained is changed depending on the size of the electrolysis tank 210 to be used. In the present embodiment, after acquiring hydrogen by the above-described method, a culture solution containing amino acids is manually acquired from the lowest container 100 of the culture unit 160 using a measuring container or the like. A liquid flow path may be attached to the container 110 so that a predetermined amount can be automatically obtained. In addition, after the culture solution is obtained, when the water stored in the container 110 is consumed for photosynthesis or nitrogen fixation and falls below a predetermined amount, water is supplied from the water supply tank 130 into the container 110. Can be replenished. In this way, cyanobacterial photosynthesis and nitrogen fixation occur repeatedly. As described above, in the hydrogen production system of the present invention, by using a plurality of containers 110, it is possible to simultaneously acquire a large amount of hydrogen with a simple system, and as a by-product, a high amount used for a power generator. A culture medium containing a concentration of amino acids can be obtained.
[Power generation device 1]

  Next, an embodiment of a power generator using hydrogen produced by the hydrogen production system will be described. FIG. 2 is a block diagram showing an overall configuration of a power generation device using hydrogen. The power generation apparatus 200 includes hydrogen and oxygen fuel supply sources 260 and 270, a fuel cell 220, a DC-DC converter 230, a charge controller 240, an auxiliary power source 201 connected by a switch 202, and an inverter 250. The

  The hydrogen supply source is the above-described high-pressure tank 260 in which hydrogen is stored. As the oxygen supply source, oxygen in the atmosphere may be used, or in order to eliminate impurities such as nitrogen in FIG. As shown, an oxygen cylinder 270 or the like may be used. Hydrogen and oxygen are connected to the fuel cell 220 via a gas flow path 215 such as a pipe or tube.

  In this embodiment, a solid oxide fuel cell (SOFC) is used as the fuel cell 220. In the solid oxide fuel cell, ion conductive ceramics such as stabilized zirconia, lanthanum, and gallium perovskite oxide having high oxide ion permeability are used for the solid electrolyte 221. In this embodiment, stabilized zirconia is used for the solid electrolyte 221. Solid oxide fuel cells are more efficient than solid polymer fuel cells and have the advantage of not requiring a catalyst.

  In the fuel cell 220, a solid electrolyte 221 is disposed at the center, and an air electrode (positive electrode) 223 to which oxygen is supplied and a fuel electrode (negative electrode) 222 to which hydrogen is supplied are disposed on both sides. Further, a fuel supply layer 225 to which hydrogen is supplied and an oxygen supply layer 224 to which oxygen is supplied are disposed on both sides thereof. In addition, a separator 226 is disposed outside them to prevent oxygen and hydrogen from leaking outside. The air electrode 223 is made of conductive ceramics, and the fuel electrode 222 is made of cermet made of nickel and electrolyte ceramics.

Oxygen atoms in the oxygen supply layer 224 receive electrons (e ⁻ ) at the air electrode 223, become O ²⁻ ions, and are carried to the solid electrolyte 221. This chemical reaction is represented by the following chemical formula.

On the fuel electrode 222 side, the O ²⁻ ions that have reached the fuel electrode 222 via the solid electrolyte 221 and the hydrogen supplied from the fuel supply layer 225 cause a chemical reaction, releasing electrons (e ⁻ ), and water ( H ₂ O).

In this way, an electric flow is generated, and an electronic device (for example, a DC-DC converter) connected to the outside generates electricity by the emitted electrons (e ⁻ ). The generated water is discharged to the outside through a liquid port (not shown).

  Next, the DC-DC converter 230 will be described. The DC-DC converter 230 is connected to the fuel cell 220 and the charge controller 240 described above. The DC-DC converter 230 is a device that converts a direct current (DC) voltage input from the fuel cell 220 into a required direct current (DC) voltage, thereby maintaining an output voltage constant. The DC-DC converter uses an electronic switch, a diode, and an inductance as basic elements, and converts a voltage by a switching operation of the electronic switch (not shown). In this embodiment, a DC-DC converter 230 that converts an input voltage (10.5 to 16 V) from the fuel cell 220 into an output voltage 12 V (40 A) is used.

  The charge controller (charge / discharge controller) 240 is attached for the purpose of preventing overcharge when the storage battery 201 is charged with power from the DC-DC converter 230. The charge controller 240 used in this embodiment includes confirmation of the input voltage from the DC-DC converter 230, confirmation of the voltage of the storage battery 201, charge / discharge management for the storage battery 201, power supply to the inverter 250, and the like. Such confirmation and management can be performed by displaying voltage, current, power, etc. on the display screen (for example, a liquid crystal monitor) of the charge controller 240. It may also be connected to a personal computer for confirmation and management.

  In the present embodiment, the charging can be set to stop when the voltage of the storage battery 201 reaches a predetermined voltage (for example, 14 V) in order to prevent overcharging. In addition, power supply to the inverter 250 is permitted when the voltage of the storage battery 201 is a predetermined voltage (for example, 12 to 13V), and power supply to the inverter 250 is stopped when the voltage is a predetermined voltage (for example, less than 12V). It can also be set. The charging stop for preventing the overcharge of the storage battery 201 and the power supply to the inverter 250 can be stopped by the switch 202 shown in FIG.

  The storage battery 201 has a storage battery capacity of 9600 Wh by connecting, for example, four 12V200A storage batteries in series. Moreover, it is good also as the high capacity | capacitance storage battery 201 which connects the storage battery of 12V200A in series, and makes storage battery capacity 24kWh. In this case, the weight of the storage battery 201 becomes very heavy (about 600 kg).

  Inverter 250 converts the DC voltage from storage battery 201 into an AC voltage. For example, when four 12V200A storage batteries are connected in series, the output voltage of the inverter 250 is about 2.8 kW (AC100V). When ten 12V200A storage batteries are connected in series, the output voltage to the inverter 250 is about 4.8 kW (AC100V). Thus, the required output electric power is obtained by adjusting the number of storage batteries.

  In the power generator of the present invention, electric power corresponding to power generation of 4.4 kWh is obtained using 1240 liters of hydrogen as fuel. As described above, by using the power generation device of the present invention, it is possible to substitute or supplement existing power generation using fossil fuel or nuclear power. However, when it is desired to use electricity for a long time, the amount of electricity from the storage battery may be insufficient. In such a case, it may be used in combination with an external power source.

The power generation apparatus of the present invention can be used for power generation for automobiles and homes as an emergency battery even in an emergency such as a power failure. In addition, since only hydrogen and oxygen are used in the power generator of the present invention and only water is discharged, the power generator has a low environmental load.
[Power generation device 2]

  Next, another power generator of the present invention will be described with reference to FIG. It is a block diagram which shows the whole structure of the electric power generating apparatus using the culture solution of the hydrogen production system shown in FIG. Hereinafter, components that are different from the power generation device 200 described in FIG. 2 will be described, and description of the same components will be omitted.

  3 uses an electrolysis tank 210 instead of the high-pressure tank 260 as a method of supplying hydrogen and oxygen to the fuel cell 220 described above. As the electrolytic solution 211 used in the electrolysis tank 210, a solution obtained by adding a culture solution containing amino acids produced by the hydrogen production system 100 to purified water is used. As the culture solution to be put into the electrolysis tank 210, only the liquid after being filtered using cotton or the like may be used. The electrolytic solution has a concentration of 0.4 to 3.4 pH. In this embodiment, a 2.4 pH electrolysis solution is used. For the measurement of the hydrogen ion concentration, for example, a PH meter (water quality measuring device) or the like can be used. In this embodiment, a jelly-like electrolysis solution in which agar is dissolved is used. Thereby, evaporation of the electrolysis solution can be prevented.

  The electrolysis tank 210 of this embodiment is composed of a box-type electrolytic cell, an electrode for electrolysis 212 (cathode) that generates hydrogen in contact with the electrolytic solution, and an electrode 213 for electrolysis that generates oxygen in contact with the electrolytic solution. (Anode) are placed side by side across the partition wall 214. Further, a gas flow path 215 for discharging the generated hydrogen and oxygen and sending them to the fuel cell 220 can be provided on the upper surface of the electrolytic cell.

  In order to apply a voltage to the electrodes for electrolysis 212 and 213, the electrodes for electrolysis 212 and 213 are connected to the external power source 201 via wiring and switches. When a voltage is applied between the electrode for electrolysis 212 and the electrode for electrolysis 213 by the external power source 201, an electrolyte containing an amino acid and water contained in the electrolyte can be electrolyzed to generate hydrogen and oxygen.

  When the electrolytic solution in the electrolysis tank 210 is consumed for electrolysis and falls below a predetermined amount, water is replenished from the water supply tank 130 into the electrolysis tank 210. In this embodiment, two electrolysis electrodes 212 and 213 are used. However, when it is desired to increase the amount of hydrogen and oxygen generated in a short time, not only the two electrolysis electrodes 212 and 213 but also a plurality of electrolysis electrodes are used. May be used. In that case, the electrolytic solution in the electrolysis tank 210 is consumed more quickly for the electrolysis, and it becomes quicker to become a predetermined amount or less.

  The electrodes 212 and 213 for electrolysis are preferably made of a material having corrosion resistance and liquid shielding properties against the electrolytic solution in order to stably generate hydrogen and oxygen. For example, a noble metal electrode such as platinum or gold having corrosion resistance to the electrolytic solution is used. In addition, at least one of the electrolysis electrodes 212 and 213 can use a porous conductor carrying a catalyst. In this example, multi-walled carbon nanotubes (2 to 7 layers) having particularly high conductivity and corrosion resistance and a large surface area are used.

When a voltage is applied between the electrode for electrolysis 212 and the electrode for electrolysis 213 by the external power source 201, hydrogen ions (H ⁺ ) in the electrolytic solution react with the electrode for electrolysis 212 of the cathode to generate hydrogen (H ₂ ). Will occur. The electrolyte solution of this example contains a large amount of hydrogen ions (H ⁺ ) because it contains a culture solution containing an amino acid (glutamine) generated by the nitrogen fixation reaction of cyanobacteria. Therefore, compared to the amount of hydrogen generated in electrolyzed water (1,240 liters) by normal water (1 liter), when 100 g of amino acid culture solution is dissolved in 1 liter of water and a 2.4 pH electrolyte is used 900 times as much hydrogen (116,000 liters) is generated.

On the other hand, in the electrode 213 for electrolysis of the anode, water (H ₂ O) in the electrolytic solution reacts to generate oxygen (O ₂ ). The amount of hydrogen generated in the cathode electrolysis electrode 212 and the amount of oxygen generated in the anode electrolysis electrode 213 can be adjusted by the switch 202 of the external power source 201. That is, the switch 202 can be turned on to increase both gas generation amounts, and the switch 202 can be turned off to reduce the amounts of both gases. When it is desired to increase (decrease) only one of the gases (for example, hydrogen), only one switch 202 can be turned on (turned off).

The partition wall 214 includes a space where hydrogen is generated by the electrolysis electrode 212 and an electrolysis electrode 213.
It can provide so that it may partition. Thereby, mixing of hydrogen and oxygen can be prevented. The partition wall 214 may include an ion exchanger in order to keep the ion concentration of the inorganic film such as porous glass, porous zirconia, and porous alumina or the electrolytic solution in each space constant. In this embodiment, an ion exchange membrane in which an ion exchange resin is formed into a film is used for the partition wall 214.

  Hydrogen and oxygen generated in the electrolysis tank 210 are discharged to the fuel supply layer 225 and the oxygen supply layer 224 of the fuel cell 220 through the gas flow path 215, respectively. Since the configurations of the fuel cell 220, the DC-DC converter 230, the charge controller 240, the storage battery 201, and the inverter 250 are the same as those of the above-described power generation device 200, description thereof is omitted.

  The external power source 201 used in the electrolysis tank 210 may be any external power source, for example, a home power source converted from alternating current to direct current, an existing battery, etc., or the power output from the fuel cell 220 described above. The storage battery 201 may be used. In this embodiment, the external power source 201 is a storage battery. By doing in this way, even if there is no supply of power from the outside, power generation is possible only with the power generation device 300. However, when using electricity for a long time, the amount of electricity from the storage battery may be insufficient. In such a case, combine both power sources (storage battery, external power source) and use them properly depending on the case. Also good.

  As described above, in the hydrogen production system of the present invention described above, by using a plurality of containers 110, a large amount of hydrogen can be obtained simultaneously with a simple system. In addition, by using a plurality of containers 110, a culture solution containing a high concentration of amino acids can be obtained by cyanobacterial photosynthesis and nitrogen fixation reaction.

  In addition, an efficient power generation apparatus 200 can be provided using hydrogen obtained by the hydrogen production system. The hydrogen storage tank (high-pressure tank) of the present invention is made of a silicon alloy blended by combustion synthesis of silicon dioxide, so that there is little hydrogen leakage, excellent strength, heat resistance, durability, and the like. Since it is heavy, it can be used on a camper, for example.

  Furthermore, since the power generation apparatus 300 uses a culture solution containing a high concentration of amino acid in the electrolysis tank 210, the hydrogen generation rate is higher than that of the conventional electrolysis tank, and hydrogen can be efficiently acquired to generate power. be able to.

  The power generation device of the present invention can be used for power generation for automobiles and homes as an emergency battery, particularly in an emergency, and can also be used as power for use in small and medium businesses.

DESCRIPTION OF SYMBOLS 100 ... Hydrogen power generation system, 110 ... Container, 120 ... Light, 130 ... Water supply tank, 140 ... Management device, 150 ... Fixed frame, 160 ... Culture unit, 200, 300 ... Power generation device, 201 ... Storage battery, 202 ... Switch, 210 DESCRIPTION OF SYMBOLS ... Electrolysis tank 211 ... Electrolytic solution 212 ... Electrolysis electrode (cathode), 213 ... Electrolysis electrode (anode), 214 ... Partition, 215 ... Gas flow path, 220 ... Fuel cell, 221 ... Solid electrolyte, 222 ... Fuel electrode, 223 ... air electrode, 224 ... oxygen supply layer, 225 ... fuel supply layer, 226 ... separator, 230 ... DC-DC converter, 240 ... charge controller, 250 ... inverter.

Claims (10)

A plurality of containers supplied with a culture solution containing a photosynthetic microorganism strain;
Light irradiation means;
Means for generating hydrogen by a photosynthesis reaction and a nitrogen fixation reaction, and obtaining the hydrogen;
Means for obtaining a culture solution containing an amino acid produced by the nitrogen fixation reaction of the photosynthetic microorganism strain;
A hydrogen production system comprising:   The hydrogen production system according to claim 1, wherein the photosynthetic microorganism strain is a cyanobacteria.   3. The hydrogen production system according to claim 1, further comprising means for transferring a photosynthetic microorganism strain and a part of the culture solution in the first container to the second container and repeating the photosynthetic reaction and the nitrogen fixation reaction. A hydrogen production system characterized by that. A high-pressure tank for storing the hydrogen generated by the hydrogen production system according to any one of claims 1 to 3,
A fuel cell for generating electricity by chemically reacting the hydrogen and oxygen;
A DC-DC converter for converting the output voltage of the fuel cell;
A storage battery for storing DC power output from the fuel cell;
A charge controller for controlling charge and discharge of the storage battery;
An inverter that converts a DC voltage output from the storage battery into an AC voltage;
A power generation device comprising:   5. The power generator according to claim 4, wherein the high-pressure tank is made of a silicon alloy in which silicon dioxide is synthesized by combustion synthesis. An electrolysis tank supplied with a culture solution containing the amino acid produced by the hydrogen production system according to any one of claims 1 to 3,
An external power source for applying voltage to the electrolyzer;
A fuel cell that generates electricity by chemically reacting hydrogen and oxygen generated from the electrolysis tank;
A DC-DC converter for converting the output voltage of the fuel cell;
A storage battery for storing DC power output from the fuel cell;
A charge controller for controlling charge and discharge of the storage battery;
An inverter that converts a DC voltage output from the storage battery into an AC voltage;
A power generation device comprising:   The power generator according to claim 6, wherein the concentration of the decomposition solution containing the amino acid in the electrolysis tank is 0.4 pH or more and 3.4 pH or less.   The power generator according to claim 6 or 7, wherein the decomposition solution containing the amino acid in the electrolysis tank is in a jelly form.   9. The power generation device according to claim 6, wherein multi-walled carbon nanotubes are used for the electrolysis electrode of the electrolysis tank. 10.   The power generator according to any one of claims 6 to 9, wherein the external power source is the storage battery.