JP5343657B2 - Power generator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a generation device capable of generating power efficiently by using exhaust gas. <P>SOLUTION: The generation device 1 includes a particulate matter removing device 3 to remove particulate matters from an exhaust gas of hydrocarbon system containing particulate matters and a solid oxide fuel cell 4 which generates power by a mixed gas of the exhaust gas of the hydrocarbon system removed of the particulate matters by the particulate matter removing device 3 and an oxidant gas. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a power generation device including a solid oxide fuel cell (SOFC).

  Conventionally, a hybrid system combining an internal combustion engine or the like and a solid oxide fuel cell has been known (Patent Document 1).

  In this hybrid system, a solid oxide fuel cell is disposed in a flow path of combustion exhaust gas of an internal combustion engine or the like, and is introduced into the fuel cell storage part from the exhaust gas introduction part and discharged to the exhaust gas discharge part. Since the solid oxide fuel cell is heated with the thermal energy of the combustion exhaust gas, the heating means such as a heater is not used. Further, by using CHx and COx contained in the combustion exhaust gas as fuel gas, it reacts at the fuel electrode and generates CO2 and H2O. Therefore, the combustion exhaust gas can be purified by reducing CHx and COx.

JP 2007-220521 A

  By the way, in the above hybrid system, combustion exhaust gas is used as a gas to be supplied to the solid oxide fuel cell. However, carbon deposition on the fuel electrode is large, leading to electrode deterioration, and there is a problem in durability. It has been desired to reduce carbon, which is a particulate material contained in exhaust gas.

  The present invention has been made to solve the above problems, and an object of the present invention is to provide a power generation apparatus that can efficiently generate power using exhaust gas.

  The present invention is a power generation apparatus for solving the above-mentioned problems, and the particulate matter removing means for removing the particulate matter from the hydrocarbon-based exhaust gas containing the particulate matter, and the particulate matter removing means by the particulate matter removing means. And a solid oxide fuel cell that generates electric power using a mixed gas of a hydrocarbon-based exhaust gas from which substances have been removed and an oxidant gas.

  According to such a power generation device, the exhaust gas can be purified by removing the particulate matter from the exhaust gas by the particulate matter removing means, and power is generated by the solid oxide fuel cell using the purified exhaust gas. Therefore, it is possible to generate electricity by effectively using the purified gas. Moreover, since electric power is generated with the purified gas, electric power can be generated efficiently.

  Further, the power generator is configured to be connectable to a gas discharging means for discharging the exhaust gas by burning fuel, and the solid oxide fuel cell is connected to the particulate matter removing means, The particulate matter removing unit may be configured to remove the particulate matter from the exhaust gas discharged by the gas discharging unit. According to this configuration, the heat generated by the gas discharge means when the fuel is burned is transmitted from the gas discharge means to the particulate matter removal means, and when generating power with the solid oxide fuel cell, The generated heat is transmitted to the particulate matter removing means. Thereby, since heat is transmitted from both sides of the particulate matter removing means, the temperature of the particulate matter removing means can be made uniform, and the particulate matter removal efficiency can be increased. Thereby, gas can be purified efficiently and power generation efficiency can be improved.

  The particulate matter removing means includes a solid electrolyte having gas permeability, an anode disposed on one surface of the solid electrolyte, and a cathode disposed on the other surface of the solid electrolyte, and the anode and Application means for applying a voltage to the solid electrolyte via a cathode may be further provided. According to this configuration, the particulate matter can be oxidized and decomposed by applying a voltage to the particulate matter removing means after removing the particulate matter by the particulate matter removing means. Thereby, the particulate matter removing means can be used repeatedly.

  Further, the particulate matter removing means may be configured to be able to remove NOx from the exhaust gas. Specifically, barium that is a NOx storage agent may be supported on the cathode. According to this configuration, NOx can be removed by storing NOx contained in the exhaust gas at the cathode.

  The application unit may be the solid oxide fuel cell. According to this configuration, the electricity generated by the solid oxide fuel cell can be efficiently used, so that the energy efficiency of the entire power generator is improved.

  According to the power generator of the present invention, it is possible to efficiently generate power using exhaust gas.

It is a schematic structure figure of the power generator concerning one embodiment of the present invention. It is a block diagram which shows the structure of an electric power generating apparatus. It is a longitudinal cross-sectional view of a particulate matter removal apparatus. It is sectional drawing which expands and shows the principal part of a particulate matter removal apparatus. It is sectional drawing which expands and shows the principal part of a particulate matter removal apparatus. It is a longitudinal cross-sectional view of the laminated solid oxide fuel cell. It is a schematic block diagram of the electric power generating apparatus which concerns on other embodiment of this invention. It is a block diagram which shows the structure of the electric power generating apparatus which concerns on other embodiment of this invention.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a schematic configuration diagram of a power generation device according to an embodiment of the present invention, and FIG. 2 is a block diagram illustrating a configuration of the power generation device.

  As shown in FIGS. 1 and 2, the power generation device 1 is connected to a gas discharge device 2 and generates power using the exhaust gas discharged from the gas discharge device 2, and is downstream of the gas discharge device 2. A particulate matter removing device 3 and a solid oxide fuel cell 4 are sequentially arranged on the side. In addition, the power generation apparatus 1 is surrounded by the casing 15 so that the exhaust gas passage 10, the upstream chamber 11, and the reaction gas passage 12 are formed in order from the upstream side (left direction in the drawing) to the downstream side (right direction in the drawing). A downstream chamber 13 and a rear flow path 14.

  The gas discharge device 2 is configured to combust fuel supplied from a fuel supply source (not shown) and discharge hydrocarbon-based exhaust gas. Examples of the gas discharge device 2 include a diesel engine, a gasoline engine, a boiler, an industrial furnace, and the like. In this embodiment, a diesel engine is used. Examples of the fuel include gasoline and light oil, and examples of the hydrocarbon-based exhaust gas include methane, ethane, propane, and butane. The exhaust gas contains particulate matter (PM) and nitrogen oxide (NOx). The gas discharge device 2 is connected to the exhaust gas flow path 10 and is configured to send the generated exhaust gas to the exhaust gas flow path 10. In addition to the exhaust gas, an oxidant gas such as air is sent to the exhaust gas passage 10. The oxidant gas may be sent from the gas discharge device 2 to the exhaust gas passage 10 or may be sent to the exhaust gas passage 10 from an oxidant gas supply unit (not shown). The exhaust gas channel 10 is connected to the upstream chamber 11, and a gas in which exhaust gas and oxidant gas are mixed is introduced from the exhaust gas channel 10 into the upstream chamber 11.

  The particulate matter removal device 3 can remove particulate matter contained in exhaust gas, and uses, for example, ECR (Electrochemical Reduction), DPF (Diesel Particulate Filter), DPNR (Diesel Particulate-NOx Reduction System), etc. However, in this embodiment, ECR is used.

  ECR collects PM at the anode by filtering through a porous solid electrolyte, and stores NOx by the NOx storage agent at the cathode, and then simultaneously reduces PM and NOx by energizing the solid electrolyte. It is a system that can.

  The particulate matter removing device 3 is formed in a cylindrical shape and is disposed in the upstream chamber 11. FIG. 3 is a longitudinal sectional view of the particulate matter removing apparatus. As shown in FIG. 3, the particulate matter removing device 3 includes a plurality of partition walls 36 extending in the axial direction of the cylindrical body, and a plurality of introduction passages 34 and discharge passages 35 formed by being surrounded by the partition walls 36. By providing, it is formed in a honeycomb shape. The introduction flow path 34 and the discharge flow path 35 are open at one end facing each other and closed at the other end. Thereby, the introduction flow path 34 is configured to be able to introduce the gas discharged from the gas discharge device 2, while the discharge flow path 35 is capable of discharging the gas toward the solid oxide fuel cell 4. It is configured. Thus, the gas is introduced from the upstream side (left side in FIG. 3) into the particulate matter removing device 3 and discharged to the downstream side (right side in FIG. 3). FIG. 4 is an enlarged cross-sectional view showing a main part of the particulate matter removing apparatus. As shown in FIG. 4, the partition wall 36 includes a solid electrolyte 361, an anode 362, and a cathode 363, each of which has gas permeability. Therefore, the particulate matter removing device 3 is configured so that the exhaust gas in the upstream chamber 11 is introduced into the introduction flow path 34, then introduced into the discharge flow path 35 through the partition wall 36, and discharged from the discharge flow path 35. It is configured.

  The anode 362 is disposed on one surface of the solid electrolyte 361 so as to face the introduction flow path 34, and is configured to collect PM in the exhaust gas when the exhaust gas passes through the partition wall 36. . On the other hand, the cathode 363 is disposed on the other surface of the solid electrolyte 361 so as to face the discharge flow path 35. The cathode 363 carries a NOx storage agent, and is configured to store NOx in the exhaust gas when the exhaust gas passes through the partition wall 36. Thus, the particulate matter removing device 3 is configured to remove impurities such as PM and NOx from the exhaust gas in the process in which the exhaust gas in the upstream chamber 11 passes through the particulate matter removing device 3. The exhaust gas from which impurities have been removed is discharged from the particulate matter removing device 3.

  At both ends in the axial direction of the particulate matter removing device 3, mesh-shaped current collectors 30 are installed. The current collector 30 is connected to a power source 5, and the power source 5 applies a voltage between both ends of the particulate matter removing device 3 via the current collector 30. FIG. 5 is an enlarged cross-sectional view showing a main part of the particulate matter removing apparatus. As shown in FIG. 5A, an anode 362 is disposed at one end of the particulate matter removing device 3 in the axial direction, and the current collector 30 is connected to the anode at one end of the particulate matter removing device 3. It is installed in close contact with 362. Further, as shown in FIG. 5B, a cathode 363 is disposed at the other axial end of the particulate matter removing device 3, and the current collector 30 is connected to the other end of the particulate matter removing device 3. In this part, it is installed so as to be in close contact with the cathode 363. Thus, a voltage can be applied from the power source 5 to the solid electrolyte 361 via the anode 362 and the cathode 363.

  As shown in FIG. 1, a plurality of solid oxide fuel cells 4 are arranged in the downstream chamber 13, and are configured to generate electric power using the reaction gas in the downstream chamber 13. The downstream chamber 13 is connected to the upstream chamber 11 via the reaction gas flow path 12, and is configured to be able to send gas from the upstream chamber 11 to the downstream chamber 13. The plurality of solid oxide fuel cells 4 are stacked by being stacked via current collectors 40 arranged between them. FIG. 6 is a longitudinal sectional view of a stacked solid oxide fuel cell. As shown in FIG. 6, the solid oxide fuel cell 4 includes a flat electrolyte 401, a fuel electrode 402 disposed on one surface of the electrolyte 401, and an air electrode 403 disposed on the other surface of the electrolyte 401. It has. The solid oxide fuel cell 4 is preferably arranged so that the fuel electrode 402 faces the reaction gas channel 12 from the viewpoint of improving the power generation efficiency by satisfactorily contacting the fuel electrode 402 and the reaction gas.

  Further, a mesh-like current collector 40 is attached to the fuel electrode 402 and the air electrode 403. Current collectors 40 at both ends of the plurality of stacked solid oxide fuel cells 4 are connected to the storage battery 6, and electricity generated in the solid oxide fuel cell 4 is charged into the storage battery 6. As the storage battery 6, a known lead storage battery can be used.

  A rear flow path 14 is connected to the downstream chamber 13, and the reaction gas that has passed through the solid oxide fuel cell 4 flows through the flow path 14.

  Next, the material of each component of the electric power generating apparatus 1 mentioned above is demonstrated.

  First, the material of the particulate matter removing device 3 will be described. The solid electrolyte 361 of the particulate matter removing device 3 includes a conventionally known yttrium-stabilized zirconia (zirconia-based electrolyte YSZ), ceria-based oxide (GDC, SDC), or a molten carbonate type. In the case of a zirconia-based electrolyte, a sufficient oxygen ion supply is possible at a high exhaust temperature of 350 ° C. or higher, while at a low temperature of 250 to 350 ° C., a solid is used to promote the oxidation reaction of PM particles described later. By adjusting the shape and thickness of the electrolyte 361, ionic conductivity can be improved. For example, the thickness of the solid electrolyte 361 is preferably 1 μm or more and 5 mm or less, and preferably 10 μm or more and 500 μm. If the thickness of the solid electrolyte 361 is too thick, the pressure loss of the introduced exhaust gas may increase. The average pore diameter of the porous solid electrolyte 361 is preferably 0.5 μm or more and 100 μm or less, and preferably 1 μm or more and 30 μm. The porosity is preferably 10% or more and 80% or less, and preferably 40% or more and 60% or less. When these values are small, the pressure loss introduced increases, and when the value is too large, the ionic conductivity per unit area may be small.

  The anode 362 and the cathode 363 are formed by mixing a solid electrolyte material into silver particles and firing the solid electrolyte material. At this time, the particle diameter of the silver particles and the solid electrolyte particles are preferably 0.01 μm or more and 10 μm or less. For example, 1 μm silver particles and 0.1 μm solid electrolyte particles can be mixed. In addition, the mixing ratio of silver and the solid electrolyte material is preferably 60 vol% or less of the solid electrolyte material, and more preferably 20 vol% or more and 40 vol% or less of the solid electrolyte material as a whole.

  Further, the cathode 363 can contain a NOx storage agent. That is, alkaline earth metal or alkali metal can be contained, and specifically, calcium, strontium, barium, radium, lithium, sodium, potassium, rubidium, cesium, and francium can be used. Of these, calcium, strontium, barium, and potassium are preferable in terms of properties such as stability and cost.

  The anode 362 may have a thickness of 1 μm to 5 mm, preferably 5 μm to 50 μm. If this thickness is too thick, the pressure loss of the exhaust gas may increase. The average pore diameter of the porous anode 362 is preferably 0.5 μm or more and 100 μm or less, and preferably 1 μm or more and 30 μm or less. The porosity is preferably 10% or more and 80% or less, and preferably 40% or more and 60% or less. If these values are small, the pressure loss of the exhaust gas introduced may increase.

  The cathode 363 may have a thickness of 1 μm to 5 mm, preferably 5 μm to 50 μm. If this thickness is too thick, the pressure loss of the exhaust gas may increase. In addition, the average pore diameter of the porous cathode 363 is preferably 0.5 μm or more and 100 μm or less, and preferably 1 μm or more and 30 μm or less. The porosity is preferably 10% or more and 80% or less, and preferably 40% or more and 60% or less. If these values are small, the pressure loss of the exhaust gas introduced may increase.

  Next, the material of the solid oxide fuel cell 4 will be described. As the material of the electrolyte 401 of the solid oxide fuel cell 4, a known material can be used, for example, a ceria-based oxide doped with samarium or gadolinium, or a lanthanum / garade-based oxide doped with strontium or magnesium. And oxygen ion conductive ceramic materials such as zirconia-based oxides containing scandium and yttrium can be used.

  As the fuel electrode 402, for example, a mixture of a metal catalyst and a ceramic powder material made of an oxide ion conductor can be used. As the metal catalyst used at this time, a material that is stable in a reducing atmosphere, such as nickel, iron, cobalt, or a noble metal (platinum, ruthenium, palladium, etc.) and has hydrogen oxidation activity can be used. In addition, as the oxide ion conductor, one having a fluorite structure or a perovskite structure can be preferably used. Examples of those having a fluorite structure include ceria-based oxides doped with samarium, gadolinium, and the like, and zirconia-based oxides containing scandium and yttrium. In addition, examples of those having a perovskite structure include lanthanum galide oxides doped with strontium and magnesium. Among the above materials, it is preferable to form the fuel electrode with a mixture of an oxide ion conductor and nickel. The mixed form of the ceramic material made of the oxide ion conductor and nickel may be a physical mixed form or a form of powder modification to nickel. Moreover, the ceramic material mentioned above can be used individually by 1 type or in mixture of 2 or more types. The fuel electrode can also be configured using a metal catalyst alone.

As the ceramic powder material forming the air electrode 403, for example, a metal oxide made of Co, Fe, Ni, Cr, Mn or the like having a perovskite structure or the like can be used. Specifically, (Sm, Sr) CoO ₃ , (La, Sr) MnO ₃ , (La, Sr) CoO ₃ , (La, Sr) (Fe, Co) O ₃ , (La, Sr) (Fe, Co , Ni) O _{3 and the} like, and (La, Sr) MnO ₃ is preferable. The ceramic material mentioned above can be used individually by 1 type or in mixture of 2 or more types.

  The average particle size of the ceramic powder that is a raw material for the electrolyte 401, the fuel electrode 402, and the air electrode 403 is preferably 10 nm to 100 μm, more preferably 50 nm to 50 μm, and particularly preferably 100 nm to 10 μm. In addition, an average particle diameter can be measured according to JISZ8901, for example.

  As a method for forming the electrolyte 401, the fuel electrode 402, and the air electrode 403, for example, a printing method can be used, and specifically, a printing method such as a screen printing method, a doctor blade method, or spray coating can be used. . In addition to this, a powder material for forming the fuel electrode 402 and the air electrode 403 is mixed with a binder, applied on a sheet (so-called green sheet), and these are laminated with an electrolyte to form an electrode. You can also.

  The current collectors 30 and 40 are made of, for example, a conductive metal such as Pt, Au, Ag, or Ni, conductive carbon fiber, or the like, and are formed in a mesh or a porous shape.

  Next, a method for generating power using the power generation device 1 configured as described above will be described.

  First, the exhaust gas discharged from the gas discharge device 2 is introduced into the upstream chamber 11 through the exhaust gas channel 10. This exhaust gas is introduced into the introduction channel 34 from the open end of the introduction channel 34 in the particulate matter removing device 3. Since the anode 362, the solid electrolyte 361, and the cathode 363 are gas permeable, the exhaust gas passes through these in order and is introduced into the discharge flow path 35, and then from the discharge flow path 35 of the particulate matter removing device 3. It is discharged outside. In this process, PM contained in the exhaust gas is captured on the surface of the anode 362, so that the exhaust gas is sent to the cathode 363 with the PM removed. Since the NOx occlusion agent is supported on the cathode 363, NOx contained in the exhaust gas is captured. In this way, the exhaust gas is purified by removing PM and NOx from the exhaust gas that has passed through the particulate matter removing device 3. In addition to the exhaust gas, an oxidant gas such as air also passes through the particulate matter removing device 3 at the same time.

  Thereafter, the purified mixed gas of the exhaust gas and the oxidant is introduced from the upstream chamber 11 into the downstream chamber 13 through the reaction gas channel 12 as a reaction gas. The reaction gas passes through the solid oxide fuel cell 4, and power generation by the solid oxide fuel cell 4 is performed in the process of passing. The generated electricity is charged in the storage battery 6.

On the other hand, after PM and NOx are deposited on the anode 362 and the cathode 363, respectively, a voltage is appropriately applied between the anode 362 and the cathode 363. Thereby, NOx trapped on the cathode 363 can be reduced to N _2, and oxygen ions generated by this chemical reaction can be supplied from the cathode 363 to the anode 362. As a result, PM present in the anode 362 can be oxidized and decomposed. Thus, PM and NOx deposited on the anode 362 and the cathode 363 can be removed.

  According to the power generator 1 according to the present embodiment as described above, the exhaust gas can be purified by removing PM from the exhaust gas by the particulate matter removing device 3, and the solid oxide can be purified using the purified exhaust gas. Since electric power is generated by the fuel cell 4, it is possible to generate electric power by effectively using the purified gas. Moreover, since electric power is generated with the purified gas, electric power can be generated efficiently. Therefore, it is possible to efficiently generate power using the exhaust gas.

  Further, after removing the particulate matter with the particulate matter removing device 3, the PM can be oxidized and decomposed by applying a voltage to the particulate matter removing device 3.

  Further, since the cathode 363 carries barium, which is a NOx storage agent, NOx contained in the exhaust gas can be stored in the cathode 363.

  As mentioned above, although one Embodiment of this invention was described, the specific aspect of this invention is not limited to the said embodiment.

  For example, in the above embodiment, the particulate matter removing device 3 and the solid oxide fuel cell 4 are housed and separated in different chambers 11 and 13, but the reaction generated by the particulate matter removing device 3. As long as the gas can be supplied to the solid oxide fuel cell 4, it is not limited to this configuration. FIG. 7 is a schematic configuration diagram of a power generator according to another embodiment of the present invention. In FIG. 7, the same components as those in FIG. As shown in FIG. 7, the particulate matter removing device 3 and the plurality of solid oxide fuel cells 4 are arranged in a row and connected via current collectors 30 and 40 and an insulator 50.

  As a material of the insulator 50, for example, a material mainly containing a material such as zirconia, silica, or alumina, mica (mica), or the like can be used. The insulator is preferably porous because it needs to diffuse gas. In order to form a porous material, there can be used a method of printing a paste made of the above-mentioned material in a mesh shape, or a paste made of the above-mentioned material containing a pore-forming agent and formed into a solid print or a sheet.

  According to such a configuration, when the fuel is burned, the heat generated in the gas discharge device 2 is transmitted from the gas discharge device 2 to the particulate matter removal device 3 and when the solid oxide fuel cell 4 generates power. In addition, the heat generated from the fuel cell 4 is transmitted to the particulate matter removing device 3. Thereby, since heat is transmitted from both sides of the particulate matter removing device 3, the temperature of the particulate matter removing device 3 can be made uniform, and the PM removal efficiency can be increased. Thereby, gas can be purified efficiently and power generation efficiency can be further increased.

  Moreover, in the said embodiment, although the voltage was applied to the particulate matter removal apparatus 3 with the power supply 5, if a voltage can be applied, it will not be limited to this structure, As shown in FIG. You can also In this case, the storage battery 6 can switch between charging from the solid oxide fuel cell 4 and voltage application to the particulate matter removing device 3 by a switch (not shown). According to such a configuration, the power of the solid oxide fuel cell 4 can be effectively used for PM removal.

  Moreover, in the said embodiment, although ECR was used as the particulate matter removal apparatus 3, it is not limited to this structure, DPF and DPNR may be sufficient.

  This DPF is a filter for removing PM in the exhaust gas, and is composed of a ceramic porous body, and collects PM by filtering the porous body. Moreover, what removes PM by combining an oxidation catalyst has been put into practical use.

  In addition, the DPNR supports a NOx occlusion type catalyst on the DPF and simultaneously reduces PM and NOx with a single catalyst. The PM in the exhaust gas is collected by filtering, and the exhaust gas has an oxygen-excess atmosphere. At this time, NOx is changed to nitrate and stored, and the collected PM is oxidized by the active oxygen generated at this time and oxygen in the exhaust gas. Further, when the exhaust gas is in a reducing atmosphere, the stored NOx is reduced to nitrogen by hydrocarbons or CO as a reducing agent contained in the exhaust gas, and PM is reduced by the active oxygen generated at this time. Oxidize. In this way, PM and NOx can be removed at the same time, and the filter in which PM is collected can be regenerated.

  In the above embodiment, the single-chamber solid oxide fuel cell is used as the solid oxide fuel cell. However, the present invention is not limited to this configuration. The mixed gas is used as the fuel electrode, and the oxidant gas is used as the air. A so-called two-chamber solid oxide fuel cell may be supplied to each of the electrodes.

  Moreover, in the said embodiment, although the solid oxide fuel cell 4 was formed in plate shape, it is not limited to this structure, For example, you may form in honeycomb form. The honeycomb shape is the same as the shape of the particulate matter removing device 3 according to the above embodiment, and thus the description thereof is omitted.

DESCRIPTION OF SYMBOLS 1 Power generator 2 Gas exhaust device 3 Particulate matter removal device 4 Solid oxide fuel cell 5 Power supply 6 Storage battery 361 Solid electrolyte 362 Anode 363 Cathode 401 Electrolyte 402 Fuel electrode 403 Air electrode

Claims (9)

Particulate matter removing means for removing the particulate matter from hydrocarbon-based exhaust gas containing particulate matter;
A solid oxide fuel cell that generates electric power using a mixed gas of a hydrocarbon-based exhaust gas from which the particulate matter has been removed by the particulate matter removing means and an oxidant gas ;
Power generator wherein the the particulate matter removing means and the solid oxide fuel cell that is coupled via an insulator. The particulate matter removing means comprises a solid electrolyte having gas permeability, an anode disposed on one surface of the solid electrolyte, and a cathode disposed on the other surface of the solid electrolyte,
The power generation device according to claim 1, further comprising an application unit that applies a voltage between the anode and the cathode. The power generation device according to claim 2, wherein the applying unit is the solid oxide fuel cell. A storage battery that is charged with electricity generated by the solid oxide fuel cell;
The power generation device according to claim 2, wherein the application unit is the storage battery. Particulate matter removing means for removing the particulate matter from hydrocarbon-based exhaust gas containing particulate matter;
A solid oxide fuel cell that generates electric power using a mixed gas of a hydrocarbon-based exhaust gas from which the particulate matter has been removed by the particulate matter removing means and an oxidant gas;
A storage battery charged with electricity generated in the solid oxide fuel cell,
The particulate matter removing means comprises a solid electrolyte having gas permeability, an anode disposed on one surface of the solid electrolyte, and a cathode disposed on the other surface of the solid electrolyte,
A power generation device that applies a voltage from the storage battery between the anode and the cathode. The power generator according to claim 4 or 5, further comprising a switch for switching charging from the solid oxide fuel cell to the storage battery and voltage application from the storage battery to the anode and the cathode. The power generator according to claim 2, wherein barium, which is a NOx storage agent, is supported on the cathode. The power generator according to any one of claims 1 to 7, wherein the particulate matter removing means is configured to be able to remove NOx from the exhaust gas. It is configured to be connectable to a gas discharge means for burning the fuel and discharging the exhaust gas,
The solid oxide fuel cell is connected to the particulate matter removing means,
The power generator according to any one of claims 1 to 8, wherein the particulate matter removing means removes the particulate matter from the exhaust gas discharged by the gas discharging means.

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