Gas supplier and gas production method

Abstract

To provide a gas supply device which uses a solid electrolyte and can secure a sufficient gas supply amount and stably supply a gas, and a gas production method using the gas supply device.SOLUTION: A gas supply device including a gas generation unit having a solid electrolyte comprises a storage tank which can store a concentrated gas generated by the gas generation unit. The storage tank is configured to enable control of an emission volume of the concentrated gas emitted from the storage tank on the basis of at least any of a volume, a temperature, and a pressure of the concentrated gas stored inside.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a gas supplier and a gas production method, for example, an oxygen concentrator, a hydrogen generator, an ammonia generator, and a methane gas generator, and in particular to a gas supplier and a gas production method that include a gas generating unit having a solid electrolyte. [Background technology]

[0002] Conventionally, gas supply devices using solid electrolytes have been known for medical and industrial use, such as oxygen concentrators that concentrate oxygen contained in air to generate gas with a high oxygen concentration, hydrogen generators that generate gas with a high hydrogen concentration by electrolyzing pure water or an aqueous solution, ammonia generators that synthesize ammonia from nitrogen and water, and methane gas generators that synthesize methane from carbon dioxide and water (Non-Patent Documents 1 to 4).

[0003] For example, as shown in FIG. 7, the oxygen concentrator has gas-permeable electrodes 104a and 104b provided on opposing surfaces 102a and 102b of a solid electrolyte 102, which is an oxide ion conductor, respectively, and a gas generating unit 100 configured so that a DC voltage can be applied between these electrodes 104a and 104b from a DC power supply 106.

[0004] In such a gas generating unit 100, one surface 102a of the solid electrolyte 102 is in contact with the atmosphere via gas-permeable electrodes 104a, 104b, and by applying a DC voltage between the electrodes 104a, 104b, oxygen in the atmosphere moves from one surface of the solid electrolyte 102, for example, from the surface 102a side to the other surface 102b side, thereby electrochemically separating only the oxygen and obtaining highly concentrated oxygen gas. [Prior art documents] [Non-patent literature]

[0005] [Non-Patent Document 1] Ken WATANABE et al., "Oxygen pumping based on c-axis-oriented lanthanum silicate ceramics: challenge toward low operating temperature", Journal of the Ceramic Society of Japan (2019) [Non-patent document 2] D. Grigoriou et al., "The role of the promoting ionic species in electrochemical promotion and in metal-support interactions", Catalysis Today 363 (2021) 122-127 [Non-patent document 3] Daniel Sastre et al., "Enhanced performance of CH4 dry reforming over La0.9Sr0.1FeO3 / YSZ under chemical looping conditions", Fuel 309 (2022) 122122 [Non-patent document 4] Y. Kobayashi et al., "Electrochemical Synthesis of Ammonia Using Proton Conducting Solid Electrolyte and Ru-doped BaCe0.9Y0.1O3-δ Electrode Catalyst", ECS Transactions, 75 (42) 43-52 (2017) Summary of the Invention [Problem to be solved by the invention]

[0006] Such gas supply devices are required to supply a sufficient amount of gas as well as a stable supply of gas because they are used for medical purposes, industrial purposes, etc. However, in the gas generation unit using the above-mentioned solid electrolyte, the amount of gas generated is limited in principle, and there may be cases where sufficient gas is not obtained for the required amount.

[0007] That is, in a gas supplier using a solid electrolyte, the amount of gas supplied tends to be insufficient relative to the required amount of gas, and when the amount of gas supplied is insufficient, it is necessary to restrict the speed of a production line, for example. As a result, when the gas supplier supplies combustion gas, insufficient combustion occurs. Furthermore, when the gas supplier is an oxygen concentrator, problems such as an insufficient amount of oxygen supplied to the patient occur.

[0008] In view of the current situation, the present invention aims to provide a gas supply device using a solid electrolyte that can provide a sufficient amount of gas and a stable gas supply, and a gas production method using this gas supply device. [Means for solving the problem]

[0009] The present invention has been invented to solve the problems in the prior art as described above, and the gas supplier of the present invention comprises: A gas supplier including a gas generating unit having a solid electrolyte, a storage tank capable of storing concentrated gas generated in the gas generating unit; and, at least one secondary tank on the exhaust side of the storage tank; Equipped with The storage tank is configured so that the amount of concentrated gas discharged from the storage tank can be controlled based on at least one of the volume, temperature, and pressure of the concentrated gas stored therein. 、 The secondary tank is configured so that the concentrated gas in the secondary tank can be heated or cooled by heat generated in the gas generating section.

[0010] In such a gas supplier, the storage tank has an inlet and an outlet for the concentrated gas, and the inlet and the outlet are each provided with at least one valve; By operating at least one of the valves provided at the inlet or outlet of the storage tank, the pressure of the concentrated gas stored inside the storage tank can be adjusted within the range of 0.1 atm or more and 150 atm or less, and the flow rate of the exhaust gas discharged from the outlet of the storage tank can be adjusted within the range of 0.1 L / min or more and 100 L / min or less.

[0012] The secondary tank has an inlet and an outlet for the concentrated gas, and the inlet and the outlet are each provided with at least one valve; By operating at least one of the valves provided at the inlet or outlet of the secondary tank, the pressure of the concentrated gas stored inside the secondary tank can be adjusted within a range of 1.0 atm or more and 800 atm or less, and the flow rate of the exhaust gas exhausted from the outlet of the secondary tank can be adjusted within a range of 1.0 L / min or more and 1000 L / min or less.

[0014] In addition, the secondary tank can be configured to adjust the supply amount of exhaust gas exhausted from the exhaust port of the secondary tank by controlling it based on at least one of the volume, temperature, and pressure of the concentrated gas stored inside.

[0015] The gas generator may be any one of an oxygen concentrator, a hydrogen generator, an ammonia generator, and a methane gas generator.

[0016] Furthermore, when the gas generating unit is an oxygen concentrator, The storage tank may be configured so that the concentrated gas stored therein can be controlled based on at least one of the volume, temperature, pressure, and oxygen concentration of the concentrated gas.

[0017] Furthermore, when the gas generating unit is an oxygen concentrator, the solid electrolyte has at least two activation surfaces facing each other; The activation surfaces are each connected to an electrode; The oxygen partial pressure of one gas in contact with one activated surface is higher than the oxygen partial pressure of the other gas in contact with the other activated surface, At least one of the gases can be connected to the atmosphere.

[0018] The storage tank can be configured so as to be capable of being heated or cooled by heat generated in the gas generating section.

[0019] In addition, the storage tank can be configured to adjust the supply amount of exhaust gas discharged from the exhaust port of the storage tank by controlling it based on at least one of the volume, temperature, and pressure of the concentrated gas stored inside.

[0020] The solid electrolyte may be an oxide containing an oxide ion conductor or a proton conductor.

[0021] Moreover, the solid electrolyte is Formula (1):A 9.3+x [T 6.0-y M y ]O 26.0+z (wherein A is one or more elements selected from the group consisting of La, Ce, Y, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Yb, Lu, Be, Mg, Ca, Sr, and Ba; T is an element containing Si or Ge, or both; M is one or more elements selected from the group consisting of Mg, Al, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Ga, Y, Zr, Ta, Nb, B, Ge, Zn, Sn, W, and Mo; x is a number of -1.4 or more and 1.5 or less; y is a number of 0.0 or more and 3.0 or less; and z is a number of -5.0 or more and 5.2 or less. The ratio of the number of moles of A to the number of moles of T is 1.3 or more and 3.7 or less).

[0022] In addition, the gas production method of the present invention generates gas by flowing a raw material gas into any one of the gas suppliers described above and applying a voltage to the solid electrolyte. [Effects of the Invention]

[0023] According to the present invention, a storage tank is provided that can store concentrated gas generated in the gas generation unit, and the concentrated gas stored in the storage tank can be controlled based on at least one of the volume, temperature, and pressure of the concentrated gas, thereby enabling stable gas supply while maintaining a sufficient supply amount of the desired gas. [Brief explanation of the drawings]

[0024] [Figure 1] FIG. 1 is a schematic diagram illustrating the configuration of a gas supplier according to one embodiment of the present invention. [Figure 2] FIG. 2 is a schematic diagram for explaining the configuration of a gas supplier in another embodiment. [Figure 3] FIG. 3 is a schematic diagram showing a modification of FIG. [Figure 4] FIG. 4 is a schematic diagram showing a modification of FIG. [Figure 5] FIG. 5 is a schematic diagram showing a modification of FIG. [Figure 6] FIG. 6 is a schematic diagram showing a modification of FIG. [Figure 7] FIG. 7 is a schematic diagram for explaining the configuration of a conventional oxygen concentrator. DETAILED DESCRIPTION OF THE INVENTION

[0025] Hereinafter, embodiments (examples) of the present invention will be described in more detail with reference to the drawings. FIG. 1 is a schematic diagram for explaining the configuration of a gas supplier when an oxygen concentrator or the like is used according to one embodiment of the present invention. In this embodiment, an oxygen concentrator that supplies concentrated oxygen as a gas generator will be described as an example, but the present invention can also be applied to, for example, a hydrogen generator, an ammonia generator, and a methane gas generator.

[0026] As shown in FIG. 1, the gas supply device 10 of this embodiment includes a gas generating unit 20 having a solid electrolyte 22, and a storage tank 40 capable of storing concentrated gas generated in the gas generating unit 20.

[0027] The gas generating unit 20 has a solid electrolyte 22, which has at least two opposing activated surfaces 22a and 22b. Electrodes 24a and 24b are connected to the activated surfaces 22a and 22b, respectively.

[0028] The electrodes 24a, 24b are connected to a DC power supply 26, allowing a DC voltage to be applied between the electrodes 24a, 24b. The electrodes 24a, 24b are preferably made of a porous material, a wire mesh, or an expanded shape, for example, so that the solid electrolyte 22 can come into contact with the outside air and the generated gas in the solid electrolyte 22 can flow through. A plate-like, layer-like, or film-like porous material containing an oxide or nitride is more preferable. The DC voltage used in the present invention is not limited to a constant voltage, and may be one that varies in value without changing the direction of the electric field.

[0029] The gas generating section 20 also includes a gas intake chamber 28 and a gas discharge chamber 30. The gas intake chamber 28 has a gas inlet 28a, and the gas intake chamber 28 is connected to the atmosphere via the gas inlet 28a. That is, air is taken into the gas intake chamber 28 from the atmosphere via the gas inlet 28a. The gas in the gas intake chamber 28 is in contact with one of the activated surfaces 22a of the solid electrolyte 22.

[0030] The gas outlet chamber 30 has a gas outlet 30a, which is connected to a gas supply pipe 32 that is connected to a storage tank 40. The gas in the gas outlet chamber 30 is in contact with the other activated surface 22b of the solid electrolyte 22.

[0031] When gas generator 20 is an oxygen concentrator as in this embodiment, the oxygen partial pressure of the gas on the side in contact with one activation surface 22b of solid electrolyte 22, i.e., the gas in gas extraction chamber 30, is higher than the oxygen partial pressure of the gas on the side in contact with the other activation surface 22a of solid electrolyte 22, i.e., the gas in gas intake chamber 28. In other words, oxygen in gas intake chamber 28 moves to gas extraction chamber 30 via solid electrolyte 22, so that the oxygen concentration of the gas in gas extraction chamber 30 is higher than that on the inlet side in contact with the atmosphere.

[0032] In this embodiment, the gas extraction chamber 30 has only a gas extraction port 30a, but in order to adjust the concentration of oxygen obtained in the gas generation unit 20, the gas extraction chamber 30 may be connected to the atmosphere, i.e., an atmosphere inlet for taking in air from the atmosphere may be provided in the gas extraction chamber 30. In this case, it is preferable to provide a valve such as a mass flow controller at the atmosphere inlet. Unlike this embodiment, when the gas generation unit 20 is any of a hydrogen generator, an ammonia generator, and a methane gas generator, the type of gas extracted from the gas extraction chamber 30 can be mixed with air, hydrogen, carbon monoxide, nitric oxide, an inert gas such as nitrogen or argon, or a hydrocarbon gas, depending on the application, to adjust the concentration.

[0033] The solid electrolyte 22 is preferably an oxide containing an oxide ion conductor or a proton conductor. Such an oxide is preferably an oxide containing a rare earth element or an alkaline earth metal element, and specific examples thereof include yttria-stabilized zirconia (YSZ), lanthanum silicate oxide (LSO), and yttrium-doped barium zirconate (BZY).

[0034] The solid electrolyte 22 may be a metal organic framework (MOF) or Nafion (registered trademark). The solid electrolyte 22 is represented by the formula (1): A 9.3+x [T 6.0-y M y ]O 26.0+z(In the formula, A is one or more elements selected from the group consisting of La, Ce, Y, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Yb, Lu, Be, Mg, Ca, Sr, and Ba. T is an element containing Si or Ge, or both. M is one or more elements selected from the group consisting of Mg, Al, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Ga, Y, Zr, Ta, Nb, B, Ge, Zn, Sn, W, and Mo. x is a number of -1.4 or more and 1.5 or less. y is a number of 0.0 or more and 3.0 or less. z is a number of -5.0 or more and 5.2 or less. The ratio of the number of moles of A to the number of moles of T is 1.3 or more and 3.7 or less.)

[0035] In the gas generating section 20 configured in this manner, a raw material gas (air in this embodiment) is supplied to the gas intake chamber 28, and with one activated surface 22a of the solid electrolyte 22 in contact with the raw material gas, a DC voltage is applied to the solid electrolyte 22 by the electrodes 24a and 24b, thereby generating a desired gas (concentrated oxygen in this embodiment).

[0036] The storage tank 40 has an inlet 42 connected to the gas supply pipe 32 and an outlet 44 for discharging concentrated gas stored in the storage tank 40. The inlet 42 (gas supply pipe 32) and the outlet 44 (gas exhaust pipe 46) are each provided with at least one valve 32a, 46a. By operating these valves 32a, 46a, it is possible to control the movement of concentrated gas from the gas generation unit 20 to the storage tank 40 and the movement of concentrated gas from the storage tank 40 to the outside. While the valves 32a, 46a are not particularly limited, for example, mass flow controllers can be used as the valves. In this embodiment, the inlet 42 and the outlet 44 are each provided with one valve 32a, 46a, respectively, it is also possible to configure the inlet 42 and the outlet 44 to each have two or more valves.

[0037] The storage tank 40 is configured to be capable of measuring at least one of the volume, temperature, and pressure of the concentrated gas in the storage tank 40 using a sensor (not shown). The storage tank 40 is also configured to be capable of controlling the amount of concentrated gas discharged from the storage tank 40 based on at least one of the volume, temperature, and pressure of the concentrated gas in the storage tank 40 measured in this manner.

[0038] Specifically, when controlling the volume of the concentrated gas, the storage tank 40 may be configured to have a syringe structure, thereby making the internal volume of the storage tank 40 variable. When controlling the temperature of the concentrated gas, a heating / cooling device may be used to heat or cool the concentrated gas.

[0039] In this embodiment, a heat conduction mechanism (not shown) is provided to transfer heat generated in the gas generation unit 20 to the concentrated gas in the storage tank 40. The heat conduction mechanism is not particularly limited, and a known heat exchanger capable of exchanging heat between the gas generation unit 20 and the storage tank 40 can be used.

[0040] In addition, when controlling the pressure of the concentrated gas, the concentrated gas in the storage tank 40 can be pressurized or depressurized by operating at least one of the above-mentioned valves 32a, 46a to control the volume or temperature.

[0041] When controlling the pressure of the concentrated gas in the storage tank 40, it is preferable to control the pressure of the concentrated gas to be 0.1 atm or more and 150 atm or less. In this case, it is also preferable to control the flow rate of the concentrated gas exhausted from the exhaust port 44 of the storage tank 40 to be 0.1 L / min or more and 100 L / min or less.

[0042] In this way, by controlling the volume, temperature, and pressure of the concentrated gas in the storage tank 40, the amount of concentrated gas discharged from the storage tank 40 can be adjusted.

[0043] Furthermore, when the gas supply device 10 is an oxygen concentrator as in this embodiment, the oxygen concentration of the concentrated gas in the storage tank 40 can be measured, and based on this oxygen concentration, the oxygen concentration of the concentrated gas in the storage tank 40 can be controlled to any concentration.

[0044] The oxygen concentration of the concentrated gas in the storage tank 40 can be adjusted by controlling at least one of the valves 32a and 46a. For example, the pressure in the storage tank 40 is reduced by the volume control described above, and then the pressure regulating valve 41 is opened to take in outside air (oxygen concentration 20.9%), thereby controlling the oxygen concentration to a desired level.

[0045] FIG. 2 is a schematic diagram for explaining the configuration of a gas supplier in another embodiment. The gas supply device 10 shown in FIG. 2 basically has the same configuration as the gas supply device 10 shown in FIG. 1, and the same components are denoted by the same reference numerals and detailed description thereof will be omitted.

[0046] In the gas supplier 10 of this embodiment, a secondary tank 50 is connected to the exhaust side of the storage tank 40 . The secondary tank 50 has an inlet 52 and an outlet 54 for the concentrated gas, and the gas exhaust pipe 46 is connected to the inlet 52 of the secondary tank 50. In addition, the exhaust port 54 is connected to a secondary exhaust pipe 56.

[0047] The inlet 52 (gas exhaust pipe 46) and the exhaust port 54 (secondary exhaust pipe 56) of the secondary tank 50 are each provided with at least one valve 46a, 56a. By operating these valves 46a, 56a, it is possible to control the movement of concentrated gas from the storage tank 40 to the secondary tank 50 and the movement of concentrated gas from the secondary tank 50 to the outside. Note that, while there are no particular limitations on such valves 46a, 56a, for example, mass flow controllers can be used. Furthermore, in this embodiment, one valve 46a, 56a is provided at each of the inlet 52 and the exhaust port 54, but it is also possible to configure the inlet 52 and the exhaust port 54 to each have two or more valves.

[0048] The secondary tank 50 is also configured to be capable of measuring at least one of the volume, temperature, and pressure of the concentrated gas in the secondary tank 50 using a sensor (not shown). The secondary tank 50 is also configured to be capable of adjusting the supply amount of exhaust gas exhausted from the exhaust port 54 of the secondary tank 50 based on at least one of the volume, temperature, and pressure of the concentrated gas in the secondary tank 50 measured in this manner.

[0049] Specifically, when controlling the volume of the concentrated gas, the secondary tank 50 may be configured to have a syringe structure so that the internal volume of the secondary tank 50 can be changed. When controlling the temperature of the concentrated gas, a heating / cooling device may be used to heat or cool the concentrated gas.

[0050] In this embodiment, a heat transfer mechanism (not shown) is provided to transfer heat generated in the gas generating unit 20 to the concentrated gas in the secondary tank 50. The heat transfer mechanism is not particularly limited, and a known heat exchanger capable of exchanging heat between the gas generating unit 20 and the secondary tank 50 can be used.

[0051] In addition, when controlling the pressure of the concentrated gas, the concentrated gas in the secondary tank 50 may be pressurized or depressurized by operating at least one of the valves 46a and 56a.

[0052] When controlling the pressure of the concentrated gas in the secondary tank 50, it is preferable to control the pressure of the concentrated gas to be 1.0 atm or more and 800 atm or less. In this case, it is also preferable to control the flow rate of the concentrated gas exhausted from the exhaust port 54 of the secondary tank 50 to be 1.0 L / min or more and 1000 L / min or less.

[0053] In this embodiment, only one secondary tank 50 is provided on the exhaust side of the storage tank 40, but the number of secondary tanks 50 is not limited to this, and for example, as shown in Fig. 3, a plurality of secondary tanks 50a to 50c can be connected in parallel to the exhaust side of the storage tank 40. In this case, it is preferable to provide at least one valve 32a, 46a to 46c, 56a to 56c between the gas generation unit 20 and the storage tank 40, between the storage tank 40 and each of the secondary tanks 50a to 50c, and on the exhaust side of each of the secondary tanks 50a to 50c.

[0054] 4, a plurality of secondary tanks 50a, 50b can be connected in series to the exhaust side of the storage tank 40. In this case, it is preferable to provide at least one valve 32a, 46a, 46a', 56a between the gas generating unit 20 and the storage tank 40, between the storage tank 40 and the secondary tank 50a, between the secondary tank 50a and the secondary tank 50b, and on the exhaust side of the secondary tank 50b, respectively.

[0055] 5, a plurality of secondary tanks 50a to 50g connected in series can also be connected in parallel to the exhaust side of storage tank 40. In this case, it is preferable to provide at least one valve 32a, 46a to 46c, 46a' to 46d', 56a to 56c between gas generating unit 20 and storage tank 40, between storage tank 40 and each of secondary tanks 50a, 50d, 50f, between each of secondary tanks 50a to 50g, and on the exhaust side of each of secondary tanks 50c, 50e, 50g.

[0056] In this way, by providing a plurality of secondary tanks 50 on the exhaust side of the storage tank 40, it becomes possible to adjust the gas supply amount to meet the needs of different production lines, etc.

[0057] Furthermore, as shown in FIG. 6, a plurality of storage tanks 40a to 40c can be connected in parallel, and each of the storage tanks 40a to 40c is connected to one or more secondary tanks 50a to 50e, respectively.

[0058] In this way, by providing a plurality of storage tanks 40a to 40c, it is possible to store a large amount of oxygen gas, or to store gases with different oxygen concentrations in each of the storage tanks 40a to 40c. As shown in FIG. 6, the storage tank 40a may be configured to have multiple secondary tanks 50a, 50b connected in series, or, like the storage tank 40c, may be configured to have multiple secondary tanks 50d, 50e connected in parallel.

[0059] Although the preferred embodiment of the present invention has been described above, the present invention is not limited to this, and various modifications are possible within the scope of the object of the present invention, such as providing only multiple storage tanks 40 in parallel on the exhaust side of the gas generating unit 20 and not providing a secondary tank 50. [Explanation of symbols]

[0060] 10 Gas supply 20 Gas generation section 22 Solid electrolyte 22a Activation surface 22b Activation surface 24a electrode 24b electrode 26 DC power supply 28 Gas intake chamber 28a Gas intake 30 Gas extraction chamber 30a Gas outlet 32 Gas supply piping 32a Valve 40 Storage Tank 40a~40c Storage tank 41 Pressure Regulating Valve 42 Inlet 44 Exhaust port 46 Gas exhaust piping 46a~46d Valves 46a'~46d' Valves 50 Secondary Tank 52 Inlet 54 Exhaust port 56 Secondary exhaust piping 56a~56d Valves 100 Gas generation unit 102 Solid electrolyte 104a electrode 104b electrode 106 DC power supply

Claims

1. A gas supplier including a gas generating unit having a solid electrolyte, a storage tank capable of storing the concentrated gas generated by the gas generating unit; At least one secondary tank is provided on the exhaust side of the storage tank; the storage tank is configured to be able to control the amount of concentrated gas discharged from the storage tank based on at least one of the volume, temperature, and pressure of the concentrated gas stored therein; A gas supplier, wherein the secondary tank is configured to be able to heat or cool concentrated gas in the secondary tank using heat generated in the gas generating section.

2. the storage tank has an inlet and an outlet for the concentrated gas, and the inlet and the outlet are each provided with at least one valve; 2. The gas supply device of claim 1, wherein the pressure of the concentrated gas stored inside the storage tank can be adjusted to a range of 0.1 atm or more and 150 atm or less, and the flow rate of the exhaust gas exhausted from the exhaust port of the storage tank can be adjusted to a range of 0.1 L / min or more and 100 L / min or less, by operating at least one of the valves provided at the inlet or exhaust port of the storage tank.

3. the secondary tank has an inlet and an outlet for the concentrated gas, and the inlet and the outlet are each provided with at least one valve; 3. The gas supply device according to claim 1 or 2, wherein the pressure of the concentrated gas stored inside the secondary tank can be adjusted to a range of 1.0 atm or more and 800 atm or less, and the flow rate of the exhaust gas exhausted from the exhaust port of the secondary tank can be adjusted to a range of 1.0 L / min or more and 1000 L / min or less, by operating at least one of the valves provided at the inlet or exhaust port of the secondary tank.

4. 4. The gas supply device according to claim 1, wherein the secondary tank is configured to adjust the supply amount of exhaust gas exhausted from the exhaust port of the secondary tank by controlling the supply amount based on at least one of the volume, temperature, and pressure of the concentrated gas stored therein.

5. The gas supplier according to claim 1 , wherein the gas generator is any one of an oxygen concentrator, a hydrogen generator, an ammonia generator, and a methane gas generator.

6. the gas generator is an oxygen concentrator; 6. The gas supplier according to claim 5, wherein the storage tank is configured to be able to control the concentrated gas stored therein based on at least one of the volume, temperature, pressure, and oxygen concentration of the concentrated gas.

7. the gas generator is an oxygen concentrator; the solid electrolyte has at least two activation surfaces facing each other; The activation surfaces are each connected to an electrode; The oxygen partial pressure of one gas in contact with one activated surface is higher than the oxygen partial pressure of the other gas in contact with the other activated surface, 7. The gas supplier according to claim 5, wherein at least one of the one gas and the other gas is connected to the atmosphere.

8. The gas supplier according to claim 1 , wherein the storage tank is configured to be capable of being heated or cooled by heat generated in the gas generating section.

9. 9. The gas supply device according to claim 1, wherein the storage tank is configured to adjust the supply amount of exhaust gas exhausted from the exhaust port of the storage tank by controlling the supply amount based on at least one of the volume, temperature, and pressure of the concentrated gas stored therein.

10. 10. The gas supplier according to claim 1, wherein the solid electrolyte is an oxide containing an oxide ion conductor or a proton conductor.

11. The solid electrolyte is Formula (1): A 9.3+x [T 6.0-y M y ]O 26.0+z (In the formula, A is one or more elements selected from the group consisting of La, Ce, Y, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Yb, Lu, Be, Mg, Ca, Sr, and Ba. T is an element containing Si or Ge, or both. M is Mg, Al, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Ga, Y, Zr, Ta, Nb, B, Ge. , Zn, Sn, W, and Mo. x is a number equal to or greater than -1.4 and equal to or less than 1.

5. y is a number equal to or greater than 0.0 and equal to or less than 3.

0. z is a number equal to or greater than -5.0 and equal to or less than 5.

2. A ratio of the number of moles of A to the number of moles of T is 1.3 or greater and equal to or less than 3.

7.

12. A gas production method comprising: causing a raw material gas to flow into the gas supplier according to claim 1 , and applying a voltage to the solid electrolyte to generate a gas.

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