JPH1167256A - Fuel cell system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make piping structure simple and easily conduct the temperature keeping or temperature rising of a catalyst reaction unit of a reformer in a fuel cell system with the reformer. SOLUTION: A reformer comprising a partially oxidizing part 110 for converting fuel into a hydrogen-rich reformed gas, a CO modifying part 120, and a CO selectively oxidizing part 130 is housed in a casing 100, and a fuel cell 200 and a hot-air device 300 supplying the outside air after heating to the casing 100 are connected to the outside of the casing 100. In starting, a fan and a burner are operated, and hot-air is supplied to the casing 100 to heat the partially oxidizing part 110, the CO modifying part 120, and the CO selectively oxidizing part 130.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel cell system in which fuel is subjected to steam reforming and the generated reformed gas is used to generate power in a fuel cell.

[0002]

2. Description of the Related Art In a fuel cell system, a reformer device is usually used for steam reforming of fuels such as natural gas, light hydrocarbons such as naphtha, and alcohols such as methanol, which can be obtained relatively easily and inexpensively. As a result, hydrogen-rich reformed gas is generated, and this reformed gas is sent to the fuel electrode side of the fuel cell, and air is sent to the air electrode side of the fuel cell by a fan, causing electrochemical reaction to generate electricity. I do.

[0003] The steam reforming reaction is represented by the following chemical formulas (1) and (2), taking methane as a main component of natural gas as an example.

[0004]

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[0005]

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As a reformer device, Japanese Patent Laid-Open No. 5-30
As described in Japanese Patent No. 3970, a steam reformer equipped with a reforming catalyst is heated by a burner to a high temperature (750 to 750).
(About 800 ° C.), steam reforming by flowing fuel and steam is often used. However, as described in JP-A-7-335238, fuel gas and air are reformed. There has also been developed one that mixes and partially oxidizes using a partial oxidation catalyst, heats the reforming catalyst, and steam reforms the partially oxidized gas with the reforming catalyst.

[0007] Further, since the reformed gas subjected to steam reforming at a high temperature as described above contains a large amount of carbon monoxide which causes deterioration of the anode catalyst of the fuel cell, the reformer apparatus is usually provided with carbon monoxide. A CO converter for reducing the concentration of CO is also provided. In this CO transformer, 200-3
The concentration of carbon monoxide can be reduced to about 1% by advancing the equilibrium reaction of Chemical Formula 2 to the right with a catalyst layer at about 00 ° C.

In the case of a fuel cell operating at a relatively low temperature, such as a polymer electrolyte fuel cell, the concentration of carbon monoxide in the reformed gas supplied to the fuel electrode is controlled in order to prevent catalyst deterioration of the fuel electrode. It is necessary to further reduce the level, and a fuel cell system in which a reformer apparatus is provided with a carbon monoxide remover has been developed. For example, JP-A-8-10
No. 6913 discloses that carbon monoxide is reduced to a low level of about 100 ppm or less by mixing air with a reformed gas generated in a reformer and passing the mixed gas through a selective oxidation catalyst layer. Thereafter, a polymer electrolyte fuel cell system for supplying the fuel cell to the fuel electrode side of the fuel cell has been disclosed.

[0009]

In such a fuel cell system, pipes for flowing fuel gas and reformed gas and pipes for feeding air are provided around each catalytic reactor for reforming fuel. Although provided, it is desired that these piping configurations be as simple as possible. In particular, in a portable fuel cell system, it is desired that the piping configuration be simple in order to improve portability.

When the fuel cell system is started, it is necessary to raise the temperature of the CO converter and the carbon monoxide remover to the operating temperature. As a conventional method for raising the temperature of a CO converter, as shown in the above-mentioned Japanese Patent Application Laid-Open No. 5-303970, the temperature is raised by an electric heater mounted inside the CO converter, or by a burner of a steam reformer. A method is known in which generated combustion gas is passed through a CO converter to heat and raise the temperature. However, each catalyst reactor of a reformer device has a simple configuration without providing such an electric heater or a piping for combustion gas. It is desired to be able to raise the temperature.

The present invention has been made in view of the above problems, and has as its object to simplify a piping structure in a fuel cell system provided with a reformer, and furthermore, it is possible to easily maintain the temperature of a catalytic reactor of a reformer apparatus and increase the temperature thereof. The goal is to be able to do

[0012]

According to the present invention, in order to achieve the above object, air introduced through an air port is mixed with fuel gas to partially oxidize the gas, and the partially oxidized gas is subjected to steam reforming. In a fuel cell system including a reformed gas generator that generates a reformed gas containing hydrogen as a main component, and a fuel cell that generates electricity by introducing a reformed gas generated by the reformed gas generator to a fuel electrode, The reformed gas generator was housed in a housing having an outside air opening for taking in outside air.

[0013] Alternatively, a reformed gas generator for generating a reformed gas mainly composed of hydrogen by steam reforming a fuel gas, and a reformed gas generated by the reformed gas generator are taken in from an air port. In a fuel cell system including a selective oxidation reactor that mixes with the air and selectively oxidizes carbon monoxide in the reformed gas, and a fuel cell that guides the reformed gas from the selective oxidation reactor to the fuel electrode to generate power, The selective oxidation reactor was housed in a housing having an outside air opening for taking in outside air.

By housing the reformed gas generator and the selective oxidation reactor in the housing as described above, the air port of the reformed gas generator and the selective oxidation reactor faces the internal space of the housing. In addition, since the casing has a function of trapping air to some extent inside the casing, if air is taken in from the outside air port, it flows into the reformed gas generator and the selective oxidation reactor from the air port through the casing.

That is, since the housing also serves as a pipe for supplying air to the reformed gas generator and the selective oxidation reactor, the air pipe can be simplified accordingly. In addition, the reformed gas generator and selective oxidation reactor housed in the housing are:
Since the air is enclosed by the air trapped in the housing, the air can keep the reformed gas generator and the selective oxidation reactor warm.

In such a fuel cell system, if a blower for taking in air from the outside air port into the housing is provided, the air taken into the housing is automatically changed from the air port by the wind pressure of the blower. It is sent to the raw gas generator and the selective oxidation reactor. If the fuel cell is provided with the inlet side of the air passage supplying air to the air electrode facing the internal space of the housing, the air taken into the housing is also sent to the air electrode. That is, the housing also functions as a pipe or a manifold for supplying air to the fuel cell, and the preheated air is sent to the air electrode.

Further, if a heater for heating the air taken in from the outside air port is provided, the heated air flows into the housing, and the reformed gas generator, the selective oxidation reactor, the fuel, and the like stored in the housing are provided. The battery can be easily heated or kept warm. Here, when the reformed gas generator is provided with a CO conversion unit that converts carbon monoxide in the steam-reformed reformed gas, if this is also stored in the housing, this CO
The metamorphic section can be easily heated and heated or kept warm.

If this heater is provided inside the housing as a burner, the air heated by the burner can be taken into the burner and used for combustion.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION

(Embodiment 1) [Description of Overall Configuration of Fuel Cell System] FIG. 1 is a configuration diagram of a fuel cell system according to an embodiment of the present invention. This fuel cell system generates power using a fuel gas such as natural gas, city gas, or naphtha. A reformer device is housed in a housing 100. That is, the present fuel cell system includes a partial oxidation unit 110 for converting fuel into a hydrogen-rich reformed gas in the casing 100.
A reformed gas generator comprising a CO conversion unit 120 and CO
A selective oxidation unit 130 is housed therein, and a fuel cell 200 and a warm air device 300 that heats outside air and sends the heated air to the housing 100 are connected to the outside of the housing 100.

FIG. 2 is a perspective view of the fuel cell system shown in FIG. The housing 100 is a heat-resistant container having a function of trapping air, and is provided with an outside air port 101 for taking in external air. In the present embodiment, housing 100 is formed of a light metal plate in consideration of portability. Partial oxidation unit 110, CO conversion unit 120, CO
The selective oxidation section 130 is fixed at a fixed position inside the housing 100 by a fixture (not shown). In addition, as shown in FIG. 2, the position of the partial oxidation part 110 is near the outside air port 101.

The partial oxidation section 110 comprises an air mixing pipe 111 for mixing air with fuel gas, and a partial oxidation reactor 112 filled with a partial oxidation catalyst for partially oxidizing the mixed gas. Are connected so that the air intake pipe 111b joins the fuel supply pipe 111a. Fuel gas is fed into the fuel supply pipe 111a from a fuel supply source outside the housing 100. In the present embodiment, a city gas containing methane as a main component is used as a fuel gas, but a hydrocarbon-based fuel such as natural gas or naphtha can also be used, or methanol or the like is vaporized into a liquid fuel. Can also be used.

The distal end of the air intake pipe 111b is
It is open so that air can be taken in from the internal space of the vehicle. The partial oxidation reactor 112 is a cylindrical can filled with a catalyst for the partial oxidation reaction. Specific examples of the catalyst for the partial oxidation reaction include a catalyst in which a platinum-based catalyst such as platinum, palladium, ruthenium, and rhodium is supported on a porous alumina formed into a honeycomb shape, or a catalyst in the form of a tablet or a sphere. Molded ones can be mentioned.

The mixed gas of the fuel gas and the air passes through the partial oxidation reactor 112 to perform a partial oxidation reaction as shown in the reaction formula (3). Combustion and a partial oxidation reaction as shown in the reaction formula (5) are also performed. Since this partial oxidation and complete combustion are exothermic reactions, in the partial oxidation reactor 112, a high-temperature reformed gas in which hydrogen, carbon monoxide, carbon dioxide, steam, and the like are mixed is generated and sent to the CO shift unit 120.

[0024]

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[0025]

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[0026]

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The CO shift unit 120 is provided in the partial oxidation reactor 11
A mixing tube 121 for mixing steam with the reformed gas sent from the CO 2 and a CO converter 12 for performing a catalytic reaction for CO conversion
Consists of two. The mixing tube 121 is connected to the partial oxidation reactor 112
Piping from a steam supply source (such as a boiler) outside the casing 100 to the piping 121a for reformed gas from
21b is connected.

The CO converter 122 is a cylindrical can filled with a catalyst for CO conversion. As this catalyst, a catalyst conventionally used in a CO converter may be used, and specific examples thereof include a tablet-shaped copper-zinc catalyst. In this CO converter 122, the reformed gas is converted into CO as shown in the reaction formula 2, thereby reducing the concentration of carbon monoxide and converting the reformed gas into a more hydrogen-rich one.
Send to 0.

Normally, the CO converter 122 is larger than the partial oxidation reactor 112, for example, one of the partial oxidation reactors 112.
Set the volume to about 0 times. A high-temperature reformed gas of about 300 to 400 ° C. is sent from the partial oxidation reactor 112 to the CO converter 122, but the inside of the CO converter 122 is about 300 ° C. at the gas inlet side and is at the outlet side. It is desirable to provide a temperature gradient so as to be about 200 ° C., and fins may be attached around the cylindrical can to adjust the temperature.

By adjusting the temperature of the CO converter 122 in this manner, the reaction represented by the above formula (2) quickly reaches equilibrium on the inlet side at a relatively high temperature (300 ° C.) and reaches a relatively low temperature (about 200 ° C.). On the outlet side of (° C.), the equilibrium of the reaction of the above chemical formula 2 moves rightward, so that the concentration of carbon monoxide in the reformed gas is reduced to a somewhat low level (about 10,000 ppm).

The CO selective oxidizing section 130 includes the CO converter 12
Air mixing pipe 131 for mixing air with the reformed gas from
And a CO selective oxidation reactor 132 for selectively oxidizing carbon monoxide using a catalyst. The concentration is further reduced to a lower level (about 100 ppm) by selectively oxidizing carbon monoxide, and the fuel cell 200 Supply. The air mixing pipe 131 is a pipe 1 for the reformed gas from the CO converter 122.
An air intake pipe 131b is connected to 31a, and an end of the air intake pipe 131b is opened so that air can be taken in from the internal space of the housing 100.

The CO selective oxidation reactor 132 has a selective oxidation catalyst filled in a cylindrical can. As the selective oxidation catalyst, a catalyst that selectively oxidizes carbon monoxide at a temperature of about 100 ° C. to 200 ° C. (that is, carbon monoxide is easily oxidized and hydrogen is hardly oxidized) is used. Specific examples thereof include those in which a platinum-based catalyst or a ruthenium-based catalyst is supported on a porous alumina body or a granular alumina carrier molded into a honeycomb shape, or those in which these catalysts are supported on a granular zeolite or the like. Can be mentioned.

The fuel cell 200 is a phosphoric acid type fuel cell comprising a large number of stacked cells each having a fuel electrode 201 and an air electrode 202 arranged in an electrolyte matrix impregnated with phosphoric acid. Piping 2 from CO selective oxidation unit 130
The reformed gas is taken into the passage on the fuel electrode 201 side via the manifold 11 and the manifold 213, and air is sent from the fan 210 to the passage on the air electrode 202 side via the manifold 220 to generate power.

The hot air device 300 includes a fan 301, a burner 302, and a heat exchanger 303. When the air sent to the housing 100 by the fan 301 passes through the heat exchanger 303, the air is heated by the burner 302. It has become so. In addition to the burner fuel, unreacted gas discharged from the passage on the fuel electrode 201 side of the fuel cell 200 is sent to the burner 302 via a pipe 212 and can be burned. The burner fuel may be a fuel from a fuel supply source, but another fuel may be used.

[Explanation of operation at the time of operation] At the time of start-up: At the time of start-up, first, the fan 301 and the burner 302 are operated to send warm air into the housing 100.
The partial oxidation unit 110, the CO conversion unit 120, and the CO selective oxidation unit 130 are heated.

When the temperature of the CO selective oxidation reactor 132 rises to a predetermined operating temperature (100 to 200 ° C.), fuel gas is sent from the fuel supply source to the partial oxidation unit 110, and steam is supplied from the steam supply source to the CO conversion unit 120. Send to In the partial oxidation unit 110, air sent into the housing 100 is taken in from the air intake pipe 111 b, mixed with fuel gas from a fuel supply source, and subjected to a partial oxidation reaction in the partial oxidation reactor 112.

The temperature of the partial oxidation reactor 112 itself rises due to the heat generated by the partial oxidation reaction, and the generated high-temperature gas is mixed with steam from the steam supply source in the CO conversion section 120, and the CO conversion is performed. The temperature of the gas is increased and the steam is reformed into a hydrogen-rich reformed gas by a steam reforming reaction. Then, the reformed gas further flows into the CO selective oxidizing unit 130 and becomes a hydrogen-rich reformed gas having a low carbon monoxide concentration.

The reformed gas is supplied to the fuel electrode 2 of the fuel cell 200.
01, and by driving the fan 210 to supply air to the air electrode 202, the fuel cell 200
Starts power generation and heats up due to heat generation. Then, the temperature of the fuel cell 200 is reduced to a predetermined operating temperature (90 to 1).
(About 60 ° C.), the normal operation starts. During normal operation: In partial oxidation section 110, partial oxidation reactor 1
The flow rate and the like of the fuel gas are adjusted so that the temperature of Step 12 becomes about 500 to 700 ° C.

The partial oxidation unit 110 that generates heat is connected to the outside air port 1
01, the housing 1
The air taken into 00 is heated by the partial oxidation reactor 112 and flows toward the CO shift section 120 and the CO selective oxidation section 130. Therefore, during normal operation,
It is considered that if only the unreacted gas from the fuel cell 200 is burned in the burner 302, the CO shift unit 120 and the CO selective oxidizing unit 130 can be maintained at a predetermined operating temperature. Is the burner 302
Adjust the temperature by increasing the output of.

As a result, a hydrogen-rich gas having a carbon monoxide concentration of 100 ppm or less is continuously sent from the CO selective oxidizing section 130 to the fuel cell 200,
At 0, stable operation is possible. During normal operation, the fuel cell 200 supplies power to an external load (not shown).

[Effects of the Fuel Cell System of the Present Embodiment] As described above, in the fuel cell system of the present embodiment, the reformer device is housed in the housing 100, and the inside of the housing 100 is partially oxidized. Unit 110 and CO selective oxidation unit 13
Since the air flow path is zero, the air piping in the reformer device is simple and excellent in portability. Also, by sending warm air from the warm air device 300 into the housing 100, the partial oxidation unit 110, the CO conversion unit 120,
The CO selective oxidizing unit 130 can be efficiently heated or kept warm from the surroundings.

The CO selective oxidizing section 130 and the fuel cell 2
00, the casing 100 and the hot air device 300
If the pipe 310, the fuel supply pipe 111a, the steam pipe 121b, and the pipe 212 between them are detachable with a coupler, the casing 100, the fuel cell 200, and the hot air device 300 are separately carried. be able to. (Embodiment 2) FIG. 3 is a configuration diagram of a fuel cell system according to the present embodiment. In the figure, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

The fuel cell system of the present embodiment has the same configuration as that of the fuel cell system of the first embodiment, except that the hot air device 300 is housed in the housing 100. The position of the fan 301 is adjusted so that the warm air device 300 can take in outside air from the outside air port 101.
It is installed so that it comes inside of 1. Further, since the hot air device 300 is housed in the housing 100, a fuel pipe for supplying burner fuel to the burner 302 and an exhaust pipe for discharging combustion gas from the burner 302 are provided through the housing 100. Have been.

Further, since the fuel cell 200 is provided outside the casing 100, a pipe 211 from the CO selective oxidizing unit 130 to the fuel cell 200 and a pipe 212 from the fuel cell 200 to the burner 302 are connected to the casing 100. Are provided to pass through. The operation and effects of the fuel cell system of this embodiment are the same as those of the first embodiment, except that the air taken into the housing 100 from the outside air opening 101 by the fan 301 is heated by the burner 302. Is different.

Since the warm air device 300 is housed in the housing 100, a better heat retaining effect can be obtained.
In the burner 302, combustion can be performed using warm air in the housing 100. When transporting, the case 1
The reformer device and the hot air device 300 in 00 are carried together.

(Embodiment 3) FIG. 4 is a configuration diagram of a fuel cell system according to the present embodiment. In this figure, the same components as those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted. The fuel cell system according to the present embodiment has the same configuration as the fuel cell system according to the second embodiment,
The difference is that the fuel cell 200 is also housed in the housing 100.

In the present embodiment, a fan dedicated to sending air to the fuel cell 200 is not provided unlike the fan 210 of the first embodiment, and the passage on the side of the air electrode 202 of the fuel cell 200 has a casing at the inlet side. An exhaust pipe that faces the internal space of the body 100 and that guides exhaust air to the outside of the housing 100 is attached to the outlet side. The operation and effects of the fuel cell system of the present embodiment are the same as those of the second embodiment, but the hot air sent into the housing 100 from the hot air device 300 is located on the side of the air electrode 202 of the fuel cell 200. It is sent to the passage. In other words, air can be supplied to the air electrode 202 without providing the fan 210 for feeding air to the fuel cell 200 and the manifold 220 for air, and the air to be sent is preheated.

(Embodiment 4) FIG. 5 is a configuration diagram of a fuel cell system according to the present embodiment. In this figure, the same components as those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted. The fuel cell system according to the present embodiment has the same configuration as the fuel cell system according to the third embodiment.
A steam reforming unit 140 is provided in place of the partial oxidation unit 110, and the reformed gas generator in the housing 100 is a steam reforming unit 1
40 and a CO conversion unit 120.

The steam reforming section 140 comprises a mixing pipe 141 for mixing steam with fuel gas from a fuel gas supply source, and a steam reformer 142 for performing a steam reforming reaction. The mixing pipe 141 is configured such that a steam pipe 141a from a steam supply source such as a boiler joins the fuel supply pipe 141a. In the fuel supply pipe 141a,
Fuel gas is supplied from a fuel supply source outside the housing 100.

The steam reformer 142 has a cylindrical can filled with a reforming catalyst (for example, a nickel-based or noble metal-based catalyst). The steam reformer 142 includes the hot air device 3
00, and is heated to 600 to 800 ° C. by warm air from the warm air device 300. In order to efficiently heat and raise the temperature of the steam reformer 142, the combustion air in the burner 302 is supplied to the steam reformer 1.
42 may be sent.

In the steam reformer 142, as shown in the reaction formula (1), the fuel gas is steam-reformed to generate a hydrogen-rich reformed gas, and the CO conversion unit 1
Send to 20. In the CO shift section 120, the CO shift reaction of the above chemical formula 2 is advanced to reduce the concentration of carbon monoxide.
It is sent to the selective oxidation unit 130. Even when steam reforming is performed without providing a partial oxidation reformer as in the present embodiment, the same effect as that of the fuel cell system of the first embodiment can be obtained.

In the fuel cell system according to the present embodiment, the steam reforming section 140 and the CO converting section 120 are provided outside the casing 100, and only the CO selective oxidizing section 130, the fuel cell 200, and the hot air device 300 are provided. Can be installed in the housing 100, and in this case, the same effect can be obtained. (Embodiment 5) FIG. 6 is a configuration diagram of a fuel cell system according to the present embodiment. In this figure, the same components as those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.

The fuel cell system of the present embodiment has the same configuration as that of the fuel cell system of the first embodiment, except that a fan 210 for feeding air to the air electrode 202 is not provided. A pipe 311 branching from a pipe 310 reaching the casing 100 and reaching the air electrode 202 of the fuel cell 200 is provided. Further, a three-way valve 320 is inserted into the pipe 310, and a fan 321 for sending outside air to the three-way valve 320 is connected thereto.

In the fuel cell system of the present embodiment, warm air can be sent from the hot air device 300 to the air electrode 202 of the fuel cell 200. In addition, by operating the three-way valve 320, it is possible to switch between cold outside air and hot air from the hot air device 300 and to send it into the housing 100. Therefore, at the time of start-up, as described in the first embodiment, warm air is sent from the hot air device 300, and the partial oxidation unit 110, the CO conversion unit 120, the CO selective oxidation unit 13
In the normal operation, an operating method may be adopted in which the temperature of the partial oxidation unit 110, the CO shift unit 120, and the CO selective oxidation unit 130 is adjusted by heating and raising the temperature of 0, and by feeding cool outside air from the fan 321.

(Other Matters) In the first embodiment,
5 to 5, the partial oxidation unit 110 and CO
Although the air in the casing 100 is automatically taken into the selective oxidizing section 130 from the air intake pipe 111b and the air intake pipe 131b, the air mixing pipe 111 and the air mixing pipe 131 are formed into an ejector structure to form the casing. If the air in the body 100 is sucked, the outside air is taken into the housing 100 from the outside air port 101 without installing the fan 301, and the air is further extracted into the partial oxidation unit 110 and the CO selective oxidation unit 130. Can be captured.

In the first to fifth embodiments, the example of the phosphoric acid type fuel cell system has been described.
By providing a polymer electrolyte fuel cell instead of the above, the present invention can be applied to a polymer electrolyte fuel cell system. However, in the case of solid polymer type, C
It is also necessary to provide a humidifier to humidify the reformed gas sent from the O selective oxidation unit to the fuel cell.

[0057]

As described above, according to the present invention, in a fuel cell system, a reformed gas generator or a selective oxidation reactor is housed in a housing having an outside air opening for taking in outside air. Since the housing also serves as a pipe for supplying air to the reformed gas generator and the selective oxidation reactor, the air pipe can be simplified accordingly.

In the case of a portable fuel cell system, the simplicity of the piping configuration leads to an improvement in portability. In addition, since the reformed gas generator and the selective oxidation reactor can be kept warm and heated by the air trapped in the housing, the reformed gas generator and the selective oxidation reactor can be easily operated at startup. Temperature.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a fuel cell system according to a first embodiment.

FIG. 2 is a perspective view of the fuel cell system.

FIG. 3 is a configuration diagram of a fuel cell system according to a second embodiment.

FIG. 4 is a configuration diagram of a fuel cell system according to a third embodiment.

FIG. 5 is a configuration diagram of a fuel cell system according to a fourth embodiment.

FIG. 6 is a configuration diagram of a fuel cell system according to a fifth embodiment.

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 housing 101 outside air opening 110 partial oxidation unit 112 partial oxidation reactor 120 CO conversion unit 122 CO conversion unit 130 CO selective oxidation unit 132 CO selective oxidation reactor 140 steam reforming unit 142 steam reformer 200 fuel cell 201 fuel electrode 202 Air electrode 300 Hot air device 301 Fan 302 Burner 303 Heat exchanger

Claims (7)

[Claims] 1. A reformed gas that mixes air introduced from an air port with a fuel gas to partially oxidize the fuel gas and reforms the partially oxidized gas by steam reforming to produce a reformed gas containing hydrogen as a main component. A fuel cell system comprising a generator and a fuel cell for introducing a reformed gas generated by the reformed gas generator to a fuel electrode to generate power, wherein the reformed gas generator includes an outside air that takes in air from outside. A fuel cell system housed in a housing having a mouth. 2. A reformed gas generator for generating a reformed gas mainly composed of hydrogen by steam reforming a fuel gas, and a reformed gas generated by the reformed gas generator is taken in from an air port. A fuel cell system comprising: a selective oxidation reactor that mixes with the air and selectively oxidizes carbon monoxide in the reformed gas; and a fuel cell that guides the reformed gas from the selective oxidation reactor to a fuel electrode to generate power. The fuel cell system according to claim 1, wherein the selective oxidation reactor is housed in a housing having an outside air opening for taking in outside air. 3. The fuel cell system according to claim 1, further comprising a blower for taking air into the housing from the outside air port. 4. The fuel cell system according to claim 3, wherein the fuel cell is provided such that an inlet side of an air passage for supplying air to an air electrode faces an internal space of the housing. . 5. A heater for heating air taken in from the outside air port is provided.
The fuel cell system according to any one of claims 1 to 4, 6. The reformed gas generator converts carbon monoxide in steam reformed reformed gas into carbon.
The fuel cell system according to claim 5, further comprising an O shift unit, wherein the CO shift unit is housed in the housing. 7. The fuel cell system according to claim 5, wherein the heater is a burner and is provided inside the housing.