JP2013206712A - Solid oxide fuel cell device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress degradation of power generation performance.SOLUTION: In a solid oxide fuel cell device, one of fuel gas or oxidant gas is supplied to an inner electrode of a fuel cell 84 via a gas manifold, the other of the fuel gas or the oxidant gas is supplied to an outer electrode of the fuel cell 84 via the gas manifold, and power generation reaction is caused utilizing the inner electrode, the outer electrode and an electrolyte layer interposed therebetween. The solid oxide fuel cell device includes a fuel cell unit 16 utilizing a glass containing boric acid in glass seals 36, 96a for sealing one gas supplied to the inside of the fuel cell 84 so as not to leak, and a capturing part 30 for capturing boron or a boron-containing material evaporating from the glass seals 36, 96a.

Description

  The present invention relates to a solid oxide fuel cell device that generates power using a fuel gas and an oxidant gas.

  A plurality of single cells capable of obtaining electric power using fuel gas (hydrogen-containing gas) and air (oxygen-containing gas, oxidant gas) are accommodated in the casing, and fuel gas and air are stored in the plurality of single cells. Various fuel cell devices that generate electricity by supplying power are proposed. Among such fuel cell devices, a solid oxide fuel cell device has a temperature during operation that rises from 700 degrees to nearly 1000 degrees, and therefore a glass seal material is used as a member for sealing components. Patent Document 1 below discloses a solid oxide fuel cell device that seals between a fuel cell and a manifold with a glass sealing material.

JP 2009-238431 A

  By the way, in order to improve the sealing performance of the glass sealing material, the glass sealing material may contain boric acid that softens the glass. However, when boric acid is contained in the glass sealing material, boron or a boron-containing substance may evaporate from the glass sealing material when the temperature in the device rises due to the operation of the solid oxide fuel cell device. When the boron or boron-containing material evaporates, the boron or boron-containing material together with the oxidant gas adheres to the three-phase interface that is the boundary between the electrode outside the cell and the electrolyte layer. Further, the evaporated boron or boron-containing substance is mixed in the exhaust gas and dissolved in the water recovered from the exhaust gas. Since the water recovered from the exhaust gas is used for the reforming reaction, boron or a boron-containing substance dissolved in the water flows into the fuel cell as water vapor, at the boundary between the electrode inside the fuel cell and the electrolyte layer. It adheres to a certain three-phase interface. If boron adheres to the three-phase interface, the ionization reaction at the three-phase interface is hindered, which may reduce the power generation performance.

  The present invention has been made in view of such problems, and an object of the present invention is a solid oxide fuel cell device that generates power using a fuel gas and an oxidant gas, and suppresses a decrease in power generation performance. An object of the present invention is to provide a solid oxide fuel cell device that can be used.

  In order to solve the above-described problems, a solid oxide fuel cell device according to the present invention supplies one gas of fuel gas or oxidant gas to an inner electrode of a fuel cell through a gas manifold, thereby Solid oxide that supplies the other gas of the agent gas to the outer electrode of the fuel cell and generates a power generation reaction using the inner electrode, the outer electrode, and the electrolyte layer disposed between the inner electrode and the outer electrode Type fuel cell apparatus, a fuel cell unit using glass containing boric acid as a sealing material for sealing so that the one gas supplied to the inside of the fuel cell does not leak, and the sealing material And a capture unit that captures boron or boron-containing material that evaporates from the substrate.

  In the present invention, by providing a fuel cell unit that uses a glass sealing material and a capture unit that captures boron or a boron-containing substance, the sealing performance in the fuel cell unit can be improved, and the solid oxide type Even if the temperature inside the device rises due to the operation of the fuel cell device and the boron or boron-containing material evaporates from the glass sealing material, the boron or boron-containing material can be captured, and the three-phase interface inside and outside the fuel cell It is possible to prevent boron or a boron-containing substance from adhering to the surface. Thereby, it is possible to suppress a decrease in ionization reaction at the three-phase interface. That is, by using the configuration of the present invention, it is possible to suppress a decrease in power generation performance.

  In the solid oxide fuel cell device according to the present invention, it is also preferable to further include an air flow generation unit that generates an air flow from the sealing material toward the capturing unit.

  In this preferable aspect, by providing an air flow generation unit that generates an air flow from the glass seal material toward the capture unit, boron or a boron-containing substance toward the capture unit can be increased. The effect of preventing the adhesion of substances can be increased.

  In the solid oxide fuel cell device according to the present invention, it is also preferable that the air flow generation unit generates an air flow from the fuel cell side to the capture unit side with reference to the sealing material.

  In this preferred embodiment, it is possible to further increase boron or a boron-containing substance toward the capture unit by generating an air flow from the fuel cell side toward the capture unit side with respect to the glass sealing material.

  In the solid oxide fuel cell device according to the present invention, it is also preferable that the air flow generation unit generates an air flow so as to form an air curtain on the opposite side of the capture unit with the sealing material interposed therebetween.

  In this preferred embodiment, by forming an air curtain on the opposite side of the capture portion with the glass seal material interposed therebetween, it is possible to block boron or a boron-containing substance from the glass seal material toward the fuel cell, and to the three-phase interface. It becomes possible to further increase the adhesion preventing effect of boron or boron-containing substances.

  ADVANTAGE OF THE INVENTION According to this invention, it is a solid oxide fuel cell apparatus which generates electric power with fuel gas and oxidant gas, Comprising: The solid oxide fuel cell apparatus which can suppress the fall of electric power generation performance can be provided. .

It is a perspective view which shows the external appearance of the fuel cell module in embodiment of this invention. It is sectional drawing in the center vicinity of FIG. 1, Comprising: It is sectional drawing which shows the cross section seen from the A direction of FIG. It is sectional drawing in the center vicinity of FIG. 1, Comprising: It is sectional drawing which shows the cross section seen from the B direction of FIG. It is a perspective view which shows the state which removed some outer plates from the casing of FIG. It is a fragmentary sectional view which shows the fuel cell unit used for this embodiment. It is a perspective view which shows the structure of the fuel cell stack in this embodiment. It is a fragmentary sectional view which shows the capture part periphery in this embodiment. FIG. 3 is a schematic diagram corresponding to FIG. 2, and is a schematic diagram showing flows of power generation air and combustion gas. FIG. 4 is a schematic diagram corresponding to FIG. 3, and is a schematic diagram showing flows of power generation air and combustion gas.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In order to facilitate the understanding of the description, the same constituent elements in the drawings will be denoted by the same reference numerals as much as possible, and redundant description will be omitted.

  A fuel cell module (solid oxide fuel cell device) according to an embodiment of the present invention will be described with reference to FIG. A fuel cell module 2 shown in FIG. 1 constitutes a part of a solid oxide fuel cell device. The solid oxide fuel cell device includes a fuel cell module 2 and an auxiliary unit (not shown).

  In FIG. 1, the height direction of the fuel cell module 2 is the y-axis direction. The x axis and the z axis are defined along a plane perpendicular to the y axis, the direction along the short direction of the fuel cell module 2 is defined as the x axis direction, and the direction along the longitudinal direction of the fuel cell module 2 is defined as z. Axial direction. The x-axis, y-axis, and z-axis described in FIG. 2 and thereafter are based on the x-axis, y-axis, and z-axis in FIG. Further, the direction along the negative direction of the z axis is the A direction, and the direction along the positive direction of the x axis is the B direction.

  The fuel cell module 2 includes a casing 56 that houses fuel cells (details will be described later), and a heat exchanger 22 that is provided on the upper portion of the casing 56. The inside of the casing 56 is a sealed space. A reformed gas supply pipe 60 and a water supply pipe 62 are connected to the casing 56. On the other hand, a power generation air introduction pipe 74 and a combustion gas discharge pipe 82 are connected to the heat exchanger 22.

  The to-be-reformed gas supply pipe 60 is a pipe line that supplies a to-be-reformed gas for reforming such as city gas into the casing 56. The water supply pipe 62 is a pipe for supplying water used when steam reforming the gas to be reformed. The power generation air introduction pipe 74 is a pipe for supplying power generation air (oxidant gas) for causing a power generation reaction with the reformed fuel gas. The combustion gas discharge pipe 82 is a pipe line for discharging the combustion gas generated as a result of burning the fuel gas after the power generation reaction.

  Next, the inside of the fuel cell module 2 will be described with reference to FIGS. 2 is a cross-sectional view of the fuel cell module 2 as viewed from the direction A in FIG. 1 in the vicinity of the center thereof. 3 is a cross-sectional view of the fuel cell module 2 as viewed from the direction B in FIG. 1 in the vicinity of the center thereof. FIG. 4 is a perspective view showing a state where a part of the casing 56 covering the fuel cell assembly is removed from the fuel cell module 2 shown in FIG.

  As shown in FIGS. 2 to 4, the fuel cell assembly 12 of the fuel cell module 2 is entirely covered with a casing 56. As shown in FIG. 4, the fuel cell assembly 12 as a whole has a substantially rectangular parallelepiped shape that is longer in the A direction than in the B direction. The upper surface on the reformer 20 side and the lower surface on the fuel gas tank 68 (gas manifold) side. , A long side surface extending along the direction A in FIG. 4 and a short side surface extending along the direction B in FIG.

  In the present embodiment, an evaporating mixer (not explicitly shown) for evaporating the water supplied from the water supply pipe 62 is provided inside the reformer 20. The evaporative mixer is heated by the combustion gas to convert water into water vapor, and to mix this water vapor with fuel gas (city gas) that is a reformed gas and air.

  The reformed gas supply pipe 60 and the water supply pipe 62 are both connected to the reformer 20 after being led into the casing 56. More specifically, as shown in FIG. 3, the reformer 20 is connected to an end on the right side in the drawing, which is an upstream end of the reformer 20.

  The reformer 20 is disposed further above the combustion chamber 18 formed above the fuel cell assembly 12. Accordingly, the reformer 20 is heated by the combustion heat of the remaining fuel gas and air after the power generation reaction, and is configured to serve as an evaporative mixer and a reformer that causes a reforming reaction. Has been.

  The upper end of the fuel supply pipe 66 is connected to the downstream end of the reformer 20 (the left end in FIG. 3). The lower end side 66 a of the fuel supply pipe 66 is disposed so as to enter the fuel gas tank 68.

  As shown in FIGS. 2 to 4, the fuel gas tank 68 is provided directly below the fuel cell assembly 12. A plurality of small holes (not shown) are formed in the outer periphery of the lower end side 66a of the fuel supply pipe 66 inserted into the fuel gas tank 68 along the longitudinal direction (A direction). The fuel gas reformed by the reformer 20 is uniformly supplied in the longitudinal direction into the fuel gas tank 68 through the plurality of small holes (not shown). The fuel gas supplied to the fuel gas tank 68 is supplied into a fuel gas flow path (details will be described later) inside each fuel cell unit 16 constituting the fuel cell assembly 12, and the fuel cell unit 16 It rises up to reach the combustion chamber 18.

  Next, the fuel cell unit 16 will be described with reference to FIG. FIG. 5 is a partial cross-sectional view showing the fuel cell unit 16 of the present embodiment.

  As shown in FIG. 5, the fuel cell unit 16 includes a fuel cell 84 and inner electrode terminals 86 respectively connected to the vertical ends of the fuel cell 84.

  The fuel cell 84 is a tubular structure extending in the vertical direction, and includes a cylindrical inner electrode layer 90 that forms a fuel gas flow path 88 therein, a cylindrical outer electrode layer 92, an inner electrode layer 90, and an outer side. An electrolyte layer 94 is provided between the electrode layer 92 and the electrode layer 92. The inner electrode layer 90 is a fuel electrode through which fuel gas passes and becomes a (−) electrode, while the outer electrode layer 92 is an air electrode in contact with air and becomes a (+) electrode. The three-phase interface is where ionization reactions (hydrogen ionization and oxygen ionization) take place. The three-phase interface is formed in the fuel cell 84, the interface where the inner electrode layer 90, the electrode catalyst, and the electrolyte layer 94 are in contact with each other, and the outer electrode layer 92, the electrode catalyst, and the electrolyte layer 94 are in contact with each other. Formed at the interface.

  Since the inner electrode terminals 86 attached to the upper end side and the lower end side of the fuel cell unit 16 have the same structure, the inner electrode terminal 86 attached to the lower end side will be specifically described here. The lower part 90 a of the inner electrode layer 90 includes an outer peripheral surface 90 b and a lower end surface 90 c exposed to the electrolyte layer 94 and the outer electrode layer 92. The inner electrode terminal 86 is connected to the outer peripheral surface 90b of the inner electrode layer 90 through a conductive sealing material 96, and is further in direct contact with the lower end surface 90c of the inner electrode layer 90 so as to be electrically connected to the inner electrode layer 90. It is connected to the. A fuel gas passage 98 communicating with the fuel gas passage 88 of the inner electrode layer 90 is formed at the center of the inner electrode terminal 86.

  The inner electrode layer 90 includes, for example, a mixture of Ni and zirconia doped with at least one selected from rare earth elements such as Ca, Y, and Sc, and Ni and ceria doped with at least one selected from rare earth elements. The mixture is formed of at least one of Ni and a mixture of lanthanum garade doped with at least one selected from Sr, Mg, Co, Fe, and Cu.

  The electrolyte layer 94 is, for example, zirconia doped with at least one selected from rare earth elements such as Y and Sc, ceria doped with at least one selected from rare earth elements, lanthanum gallate doped with at least one selected from Sr and Mg, Formed from at least one of the following.

  The outer electrode layer 92 includes, for example, lanthanum manganite doped with at least one selected from Sr and Ca, lanthanum ferrite doped with at least one selected from Sr, Co, Ni and Cu, Sr, Fe, Ni and Cu. It is formed from at least one of lanthanum cobaltite doped with at least one selected from the group consisting of silver and silver.

  Next, the fuel cell stack 14 will be described with reference to FIG. FIG. 6 is a perspective view showing the fuel cell stack 14 of the present embodiment.

  As shown in FIG. 6, the fuel cell stack 14 includes 16 fuel cell units 16, and a lower end side and an upper end side of these fuel cell units 16 are respectively made of ceramic fuel gas tank upper plate 68 a and It is supported by the upper support plate 100. The upper support plate 100 uses, for example, Mgo (magnesia) as a material. The fuel gas tank upper plate 68a and the upper support plate 100 are formed with through holes through which the inner electrode terminal 86 can pass.

  Further, a current collector 102 is attached to the fuel cell unit 16. The current collector 102 electrically connects the inner electrode terminal 86 attached to the inner electrode layer 90 that is a fuel electrode and the outer peripheral surface of the outer electrode layer 92 that is the air electrode of the adjacent fuel cell unit 16. To connect.

  Further, the external terminals 104 are connected to the inner electrode terminals 86 at the upper and lower ends of the two fuel cell units 16 located at the ends of the fuel cell stack 14. These external terminals 104 are connected to the external terminals 104 of the fuel cell unit 16 at the end of the adjacent fuel cell stack 14, and all 160 fuel cell units 16 are connected in series. Yes.

  When the fuel cell unit 16 is disposed on the fuel gas tank upper plate 68a, the capture unit 30 is provided between the inner electrode terminal 86 and the fuel gas tank upper plate 68a. The capture unit 30 is a member used when the inner electrode terminal 86 of the fuel cell unit 16 is inserted and fixed in the through hole of the fuel gas tank upper plate 68a. That is, the capture unit 30 is used as a member that fixes the fuel cell unit 16 to the gas manifold.

  The capturing unit 30 will be described with reference to FIG. FIG. 7 is a partial cross-sectional view showing the capture unit 30 and its surroundings according to the present embodiment.

  As shown in FIG. 7, the capture unit 30 is disposed between the inner electrode terminal 86 at the lower end of the fuel cell 84 and the fuel gas tank upper plate 68a. The upper surface of the capture unit 30 is connected to the inner electrode terminal 86 through the glass seal portion 36. The glass sealing portion 36 uses boric acid-containing glass as a sealing material, and seals the fuel gas supplied to the inside of the fuel cell 84 so as not to leak.

  The sealing material 96 between the outer peripheral surface of the lower end portion of the fuel cell 84 and the inner electrode terminal 86 is formed in two layers, the upper layer side is configured by a glass seal portion 96a, and the lower layer side is a silver brazing portion 96b. Composed.

  That is, the capture part 30 is disposed so as to be located on the opposite side of the fuel cell 84 with the glass seal parts 36 and 96a interposed therebetween.

The capturing unit 30 is formed of a material capable of adsorbing boron and a boron-containing substance, and can be made of, for example, Mgo, Al ₂ O ₃ , or CaO. By providing the capture unit 30 in the immediate vicinity of the glass seals 36 and 96a, boron or a boron-containing substance that evaporates from the glass seals 36 and 96a at a high temperature such as during operation of the fuel cell is adsorbed and captured by the capture unit 30. It becomes possible.

  Next, a structure for supplying power generation air to the inside of the fuel cell module 2 will be described with reference to FIGS. 2 to 4, 8, and 9. FIG. 8 is a schematic diagram corresponding to FIG. 2 and shows the flow of power generation air and combustion gas. FIG. 9 is a schematic diagram corresponding to FIG. 3, and similarly shows the flow of power generation air and combustion gas. As shown in these drawings, a heat exchanger 22 is provided above the reformer 20. The heat exchanger 22 is provided with a plurality of combustion gas pipes 70 and a power generation air flow path 72 formed around the combustion gas pipes 70.

  A power generation air introduction pipe 74 is attached to one end side (the right end in FIGS. 3 and 9) on the upper surface of the heat exchanger 22. With this power generation air introduction pipe 74, power generation air is introduced into the heat exchanger 22 from a power generation air flow rate adjustment unit (not shown).

  As shown in FIG. 2, a pair of outlet ports 76 a for the power generation air flow path 72 is formed on the other end side (the left end in FIGS. 3 and 9) on the upper side of the heat exchanger 22. The outlet port 76a is connected to a pair of communication channels 76. Further, power generation air supply passages 77 are formed on the outer sides of both sides of the casing 56 of the fuel cell module 2 in the width direction (B direction: short side surface direction).

  Therefore, power generation air is supplied to the power generation air supply path 77 from the outlet port 76 a of the power generation air flow path 72 and the communication flow path 76. The power generation air supply path 77 is formed along the longitudinal direction of the fuel cell assembly 12. Furthermore, in order to blow out the air for power generation toward each fuel cell unit 16 of the fuel cell assembly 12 in the power generation chamber 10 at a position corresponding to the lower side of the fuel cell assembly 12 below the fuel cell assembly 12. A plurality of outlets 78a and 78b are formed. The power generation air blown out from these air outlets 78a and 78b flows upward along the outside of each fuel cell unit 16, and a part also flows downward. That is, these air outlets 78a and 78b function as an air flow generation unit that generates an air flow from the glass seal portions 36 and 96a toward the capture unit 30. The air flow generation unit generates an air flow from the fuel cell 84 side toward the capture unit 30 side with reference to the glass seal portions 36 and 96a.

  Furthermore, as shown in FIG. 8, the airflow generation unit generates an airflow so as to form an air curtain above the inner electrode terminal 86 at the lower end of the fuel cell 84. That is, the airflow generation unit generates an airflow so that an air curtain is formed on the side opposite to the capture unit 30 with the glass seal portions 36 and 96a interposed therebetween.

  Next, with reference to FIGS. 8 and 9, a structure for discharging combustion gas generated by combustion of fuel gas and power generation air will be described. The combustion gas generated above the fuel cell unit 16 rises in the combustion chamber 18 and reaches the rectifying plate 21. The rectifying plate 21 is provided with an opening 21a, and combustion gas is guided into the opening 21a. The combustion gas that has passed through the opening 21 a reaches the other end side of the heat exchanger 22. In the heat exchanger 22, a plurality of combustion gas pipes 70 are provided for discharging combustion gas generated by combustion of fuel gas and power generation air in the combustion chamber 18. A combustion gas discharge pipe 82 is connected to the downstream end side of these combustion gas pipes 70 so that the combustion gas is discharged to the outside.

  As described above, according to the fuel cell module 2 in the embodiment, the fuel cell unit includes the fuel cell unit 16 having the glass seal portions 36 and 96a and the capture unit 30 that captures boron and a boron-containing substance. Even if the sealing performance in the unit 16 can be improved and the temperature in the apparatus rises due to the operation of the fuel cell module 2 and boron or a boron-containing substance evaporates from the glass seal portions 36 and 96a, boron or boron-containing material can be obtained. Substances can be captured, and boron or boron-containing substances can be prevented from adhering to the three-phase interface inside and outside the fuel cell 84. Thereby, it is possible to suppress a decrease in ionization reaction at the three-phase interface. That is, by using the configuration of the present invention, it is possible to suppress a decrease in power generation performance.

  Moreover, according to the fuel cell module 2 in the embodiment, boron or a boron-containing material toward the capture unit 30 is increased by including an air flow generation unit that generates an air flow from the glass seals 36 and 96a toward the capture unit 30. Therefore, the adhesion preventing effect of boron or a boron-containing substance on the three-phase interface can be increased.

  Further, according to the fuel cell module 2 in the embodiment, the capture unit 30 is disposed on the opposite side of the fuel cell 84 with the glass seal portions 36 and 96a interposed therebetween, and the fuel cell unit is based on the glass seal portions 36 and 96a. By generating an air flow from the 84 side toward the capturing unit 30, it is possible to further increase boron or a boron-containing material toward the capturing unit 30.

  Further, according to the fuel cell module 2 in the embodiment, the air curtain is formed on the opposite side of the capture unit 30 with the glass seal portions 36 and 96a interposed therebetween, so that the fuel cell 84 is directed from the glass seal portions 36 and 96a. Boron or a boron-containing substance can be blocked, and the adhesion preventing effect of boron or the boron-containing substance on the three-phase interface can be further increased.

  The embodiments of the present invention have been described above with reference to specific examples. However, the present invention is not limited to these specific examples. In other words, those specific examples that have been appropriately modified by those skilled in the art are also included in the scope of the present invention as long as they have the characteristics of the present invention. For example, the elements included in each of the specific examples described above and their arrangement, materials, conditions, shapes, sizes, and the like are not limited to those illustrated, but can be changed as appropriate. Moreover, each element with which each embodiment mentioned above is provided can be combined as long as technically possible, and the combination of these is also included in the scope of the present invention as long as it includes the features of the present invention.

  For example, since the capture unit 30 only needs to be arranged so as to capture evaporated boron or a boron-containing material, it is possible to use a configuration arranged as a capture unit where the evaporated boron or boron-containing material can reach. it can. More specifically, a form in which the fuel gas tank upper plate 68a is used as a capture part and a form in which the capture part 30 is configured as a part of the fuel gas tank 68 are also included in the scope of the present invention.

2: Fuel cell module (solid oxide fuel cell device)
10: Power generation chamber 12: Fuel cell assembly 14: Fuel cell stack 16: Fuel cell unit 18: Combustion chamber 20: Reformer 21: Rectifier plate 21a: Opening 22: Heat exchanger 30: Capture unit 36: Glass seal portion 56: casing 56a: casing bottom plate 60: reformed gas supply pipe 62: water supply pipe 66: fuel supply pipe 66a: lower end side 68: fuel gas tank (gas manifold)
68a: Fuel gas tank upper plate 68b: Fuel gas tank side plate 70: Combustion gas pipe 72: Power generation air flow path 74: Power generation air introduction pipe 76: Communication flow path 76a: Outlet port 77: Power generation air supply paths 78a, 78b: Air outlet (airflow generator)
82: Combustion gas discharge pipe 84: Fuel cell 86: Inner electrode terminal 88: Fuel gas flow path 90: Inner electrode layer 90a: Lower part 90b: Outer peripheral surface 90c: Lower end surface 92: Outer electrode layer 94: Electrolyte layer 96: Seal Material 96a: Glass seal part 96b: Silver brazing part 98: Fuel gas flow path 100: Upper support plate 102: Current collector 104: External terminal

Claims (4)

One gas of fuel gas or oxidant gas is supplied to the inner electrode of the fuel cell through the gas manifold, and the other gas of fuel gas or oxidant gas is supplied to the outer electrode of the fuel cell, and the inner electrode A solid oxide fuel cell device that generates a power generation reaction using an outer electrode and an electrolyte layer disposed between the inner electrode and the outer electrode,
A fuel cell unit that uses glass containing boric acid as a sealing material for sealing so that the one gas supplied to the inside of the fuel cell does not leak;
A capture unit that captures boron or boron-containing material evaporating from the sealing material;
A solid oxide fuel cell device comprising:   The solid oxide fuel cell device according to claim 1, further comprising an air flow generation unit that generates an air flow from the sealing material toward the capture unit.   3. The solid oxide fuel cell device according to claim 2, wherein the air flow generation unit generates an air flow from the fuel cell side toward the capture unit side with reference to the sealing material. 4.   3. The solid oxide fuel cell device according to claim 2, wherein the air flow generation unit generates an air flow so as to form an air curtain on the opposite side of the capture unit with the sealant interposed therebetween.

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