KR101135493B1 - Fuel cell system and reformer - Google Patents

Abstract

The fuel cell system according to the present invention includes an electric generator for generating electrical energy through an electrochemical reaction between hydrogen and oxygen, a reformer for generating hydrogen gas from fuel through a chemical catalytic reaction by thermal energy, and the reformer. Heat energy provided to the reformer using a fuel supply source for supplying fuel to the furnace, an air supply source for supplying air to the reformer and the electricity generating unit, and latent heat of evaporation generated by a temperature difference between the fuel and the air supplied to the reformer. It includes a heat treatment means for controlling the.

Fuel cell, stack, reformer, burner part, reforming reaction part, pipeline, evaporation, latent heat, heat treatment means

Description

Fuel Cell System and Reformer {FUEL CELL SYSTEM AND REFORMER}

1 is a block diagram schematically showing the overall configuration of a fuel cell system according to a first embodiment of the present invention.

2 is an exploded perspective view showing the structure of the stack shown in FIG.

3 is a perspective view schematically showing a reformer structure according to the first embodiment of the present invention.

4 is a cross-sectional configuration diagram of FIG. 3.

5 is a perspective view schematically showing a reformer structure according to a second embodiment of the present invention.

6 is a cross-sectional configuration diagram of FIG. 5.

The present invention relates to a fuel cell system, and more particularly, to a fuel cell system having an improved structure of a reformer.

As is known, a fuel cell is a power generation system that directly converts the chemical reaction energy of hydrogen and oxygen contained in hydrocarbon-based fuels such as methanol, ethanol, and natural gas into electrical energy.

This fuel cell is classified into a phosphoric acid fuel cell, a molten carbonate fuel cell, a solid oxide fuel cell, a polymer electrolyte type or an alkaline fuel cell according to the type of electrolyte used. Each of these fuel cells operates on essentially the same principle, but differs in the type of fuel used, operating temperature, catalyst, and electrolyte.

Among these, the polymer electrolyte fuel cell (PEMFC, hereinafter referred to as PEMFC for convenience), which has been developed recently, has excellent output characteristics, low operating temperature, and fast start-up and response characteristics compared to other fuel cells. In addition to mobile power supplies such as automobiles, as well as distributed power supplies such as homes and public buildings and small power supplies such as for electronic devices has a wide range of applications.

Such a PEMFC basically includes a stack, a reformer, a fuel tank, a fuel pump, and the like to constitute a system. The stack forms the body of the fuel cell, and the fuel pump supplies the fuel in the fuel tank to the reformer. The reformer reforms the fuel to generate hydrogen gas and supplies the hydrogen gas to the stack. Therefore, the stack generates electrical energy through an electrochemical reaction between hydrogen gas supplied from the reformer and oxygen gas supplied separately or oxygen contained in the air.

In the fuel cell system configured as described above, the reformer generates hydrogen gas from the fuel through a chemical catalytic reaction by thermal energy, and includes a burner unit for generating the thermal energy, and a reforming catalytic reaction using the thermal energy. It is equipped with the reforming reaction part which generate | occur | produces hydrogen gas through. Here, the burner part is configured to generate thermal energy through an oxidation reaction between fuel and air by an oxidation catalyst provided inside the reactor body.

However, the conventional reformer is a relatively high temperature combustion gas generated through the oxidation reaction of the fuel and air in the burner portion, and / or the heat energy in the hydrogen gas supplied to the stack from the reforming reaction portion is released as it is, the thermal efficiency of the entire system There was a problem of falling.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and an object thereof is to provide thermal energy of combustion gas and / or hydrogen gas generated from a reforming reaction portion generated through oxidation of a burner portion to fuel and air supplied to the burner portion. To provide a fuel cell system and a reformer of the structure.

The reformer according to the present invention for achieving the above object is a burner unit for generating heat energy through an oxidation catalyst reaction of fuel and air, and is connected to the burner unit to supply the fuel and air to the burner unit A reforming reaction unit for generating hydrogen gas from the fuel through a reforming catalytic reaction by the thermal energy, and a reforming reaction unit connected to the reforming reaction unit to discharge the hydrogen gas from the reforming reaction unit. A second pipeline,

The first pipeline is configured to be in contact with the second pipeline.                     

The reformer according to the present invention has a structure in which the first pipeline is wound in a spiral form on the second pipeline. In this case, the first and second pipelines are preferably made of a metal material.

In addition, the reformer according to the present invention is supplied to the burner unit while the fuel and air at a temperature lower than the fuel is joined to the first pipeline, and the first pipeline is promoted by promoting evaporation of the fuel and air. The second pipeline receives a latent heat of evaporation. In this case, the fuel is preferably maintained at 20 to 25 ℃, the air is preferably maintained at 10-15 ℃.

In the reformer according to the present invention, the burner unit may include a burner main body and an oxidation catalyst formed on the burner main body.

In the reformer according to the present invention, the reforming reaction unit may include a reactor body and a reforming catalyst formed in the reactor body.

In addition, the reformer according to the present invention for achieving the above object, the burner unit for generating heat energy through the oxidation catalyst reaction of the fuel and air, and the hydrogen gas from the fuel through the reforming catalyst reaction by the heat energy A reforming reaction unit to be generated, a first pipeline connected to the burner unit to supply the fuel and air to the burner unit, and connected to the reforming reaction unit to discharge the hydrogen gas from the reforming reaction unit. A second pipeline for connection to the burner unit, a third pipeline for discharging the combustion gas of the fuel and air combusted by the oxidation reaction, and a reforming reaction unit connected to the reforming reaction unit. A fourth pipeline for supplying fuel,

The first pipeline is configured to be in contact with the third pipeline.

The reformer according to the present invention has a structure in which the first pipeline is wound in a spiral form on the third pipeline. In this case, the first and third pipelines are preferably made of a metal material.

In addition, the fuel cell system according to the present invention for achieving the above object, the electricity generation unit for generating electrical energy through the electrochemical reaction of hydrogen and oxygen, and hydrogen from the fuel through the chemical catalytic reaction by thermal energy A latent heat of evaporation generated by a reformer for generating gas, a fuel supply source for supplying fuel to the reformer, an air supply source for supplying air to the reformer and the electricity generating unit, and a temperature difference between the fuel and the air supplied to the reformer And heat treatment means for controlling the thermal energy provided to the reformer.

In the fuel cell system according to the present invention, the reformer includes a burner unit generating heat energy through an oxidation catalyst reaction of fuel and air, and generating hydrogen gas from the fuel through a reforming catalyst reaction by the heat energy. A reforming reaction unit, a first pipeline connected to the burner unit for supplying the fuel and air to the burner unit, and connected to the reforming reaction unit to discharge the hydrogen gas from the reforming reaction unit. A second pipeline connected to the burner unit, a third pipeline for discharging the combustion gas of the fuel and air combusted by the oxidation reaction, and connected to the reforming reaction unit to supply fuel to the reforming reaction unit. And a fourth pipeline for supply.

In the fuel cell system according to the present invention, the heat treatment means preferably has a structure in which the first pipeline is wound in a spiral form on the second pipeline.

In the fuel cell system according to the present invention, the heat treatment means preferably has a structure in which the first pipeline is wound in a spiral form on the third pipeline.

In addition, the fuel cell system according to the present invention may be provided with a plurality of the electric generators to form a stack having an aggregate structure of these electric generators.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

1 is a block diagram schematically showing the overall configuration of a fuel cell system according to a first embodiment of the present invention, Figure 2 is an exploded perspective view showing the structure of the stack shown in FIG.

Referring to this drawing, the fuel cell system 100 according to the present invention is described. The fuel cell system 100 reforms a fuel containing hydrogen to generate hydrogen gas, and generates the hydrogen gas and the oxidant gas. It adopts Polymer Electrode Membrane Fuel Cell (PEMFC) method that chemically reacts to generate electrical energy.

In the fuel cell system 100, the fuel for generating electricity includes a fuel made of a liquid or gaseous state containing hydrogen such as methanol, ethanol or natural gas. However, the fuel described below means a fuel made of a liquid phase for convenience.

The system 100 may use oxygen gas stored in a separate storage means as an oxidant gas that reacts with hydrogen gas, and may use air containing oxygen. However, the latter example is explained below.

The fuel cell system 100 according to the present invention basically includes an electric generator 11 which generates electric energy through an electrochemical reaction between hydrogen and oxygen, and generates hydrogen gas from the above-described fuel. To provide a reformer 30 for supplying gas to the electricity generator 11, a fuel supply source 50 for supplying the fuel to the reformer 30, and oxygen to the reformer 30 and the electricity generator 11. It is configured to include an air source 70 for supplying air to the reformer 30 and the electricity generator 11, respectively.

As shown in FIG. 2, the electricity generating unit 11 according to the present embodiment has a membrane-electrode assembly (MEA) 12 centered on both sides thereof and a separator (in the art, bipolar). (Separator) 16 is arranged to form a fuel cell of a minimum unit. Therefore, in the present embodiment, a plurality of electricity generating units 11 having the smallest unit as described above may be provided to form a stack 10 having an aggregate structure of these electricity generating units 11.

The membrane-electrode assembly 12 includes an anode electrode on one side and a cathode electrode on the other side and an electrolyte membrane between the two electrodes, each having an active area having a predetermined area causing an electrochemical reaction between hydrogen and oxygen. Consists of The anode electrode functions to oxidize hydrogen to convert hydrogen ions (protons) into electrons. The cathode electrode functions to reduce and react the hydrogen ions and oxygen to generate heat and moisture at a predetermined temperature. The electrolyte membrane functions as an ion exchange to move hydrogen ions generated at the anode electrode to the cathode electrode. In addition to supplying hydrogen and oxygen to both sides of the membrane-electrode assembly 12, the separator 16 also functions as a conductor that connects the anode electrode and the cathode electrode in series.

Since the stack 10 may be configured as a stack of a conventional polymer electrolyte fuel cell, detailed description thereof will be omitted herein.

The reformer 30 applied to the present invention has a structure that generates hydrogen gas from the fuel through a catalytic reaction such as a chemical catalytic reaction by thermal energy, for example, steam reforming, partial oxidation, or autothermal reaction. The structure of the reformer 30 will be described later with reference to FIGS. 3 and 4.

The fuel supply source 50 for supplying fuel to the reformer 30 as described above is connected to the fuel tank 51 and the fuel tank 51 for storing liquid fuel, and discharges fuel from the fuel tank 51. The fuel pump 53 is included.                     

The air supply source 70 includes an air pump 71 that sucks air with a predetermined pumping force and supplies the air to the electricity generator 11 and the reformer 30, respectively. In the present embodiment, the oxygen source 70 is configured to supply air to the electricity generator 11 and the reformer 30 through a single air pump 71, as shown in the figure, but is not limited thereto. It may be provided without a pair of air pumps connected to the electricity generating unit 11 and the reformer 30, respectively.

Upon operation of the present system 100 configured as described above, when the hydrogen gas generated from the reformer 30 is supplied to the electricity generating unit 11 and air is supplied to the electricity generating unit 11, the stack In (10), the electrochemical reaction between hydrogen and oxygen generates electric energy, water and heat of a predetermined output.

On the other hand, the fuel cell system 100 according to the present invention is driven by the general micom type control unit (not shown) of the conventional separately provided, for example, the fuel supply source 50, the air supply source 70, etc. Operation can be controlled substantially.

Hereinafter, with reference to the accompanying drawings, an embodiment of the structure of the reformer 30 mentioned above will be described in detail.

3 is a perspective view schematically illustrating a reformer structure according to a first embodiment of the present invention, and FIG. 4 is a cross-sectional view of FIG. 3.

Referring to the drawings, in the present invention, the reformer 30 includes a burner unit 35 for generating heat energy through an oxidation catalyst reaction of liquid fuel and air, and the fuel through a reforming catalyst reaction using the heat energy. It is configured to include a reforming reaction unit 39 for generating hydrogen gas from.

The burner section 35 includes a burner body 31 and an oxidation catalyst 32 formed on the burner body 31.

The burner body 31 may be formed of a reaction substrate made of a plate type while having a channel allowing the flow of fuel and air, or may be formed of a container type having a predetermined internal space. In this embodiment, the burner body 31 is preferably made of a container type that can inject fuel and air into the inner space, as shown in the figure.

The oxidation catalyst 32 is equipped with a conventional catalyst for promoting the oxidation reaction of fuel and air. At this time, the oxidation catalyst 32 may be formed on the inner surface of the channel when the burner body 31 is composed of a reaction substrate, and pellets or when the burner body 31 is made of a container type. It may be formed of a honey comb type. Preferably, the oxidation catalyst 32 is formed in a pellet form, as shown in the figure is preferably filled in the internal space of the burner body 31.

The reforming reaction section 39 includes a reactor body 36 and a reforming catalyst 37 formed in the reactor body 36.

The reactor body 36 may be composed of a reaction substrate made of a plate type while having a channel to enable the flow of fuel, or may be formed of a container type having a predetermined internal space. In the present embodiment, the reactor body 36 is preferably made of a container type that can inject fuel and air into the internal space, as shown in the figure.

And the reforming catalyst 37 is equipped with a conventional catalyst for promoting the reforming reaction of the fuel. At this time, the reforming catalyst 37 may be formed on the inner surface of the channel when the reactor body 36 is composed of a reaction substrate, pellets or when the reactor body 36 is a vessel type It may be formed of a honey comb type. Preferably, the reforming catalyst 37 is formed in a pellet form, as shown in the figure is preferably filled in the inner space of the reactor body (36).

The reformer 30 performs a reforming reaction of the fuel by the reforming catalyst 37 in the first pipeline 33a for supplying fuel and air to the burner body 31 and inside the reactor body 36. The second pipeline 38a for discharging hydrogen gas generated through the exhaust gas, and the relatively high-temperature combustion gas generated through the oxidation reaction between the fuel and the air by the oxidation catalyst 32 in the burner body 31 are discharged. And a third pipeline 33b for supplying fuel and a fourth pipeline 38b for supplying fuel into the reactor body 36. In this case, each of the pipe lines 33a, 33b, 38a, and 38b may be formed of a metal material, for example, a copper material having thermal conductivity with the copper material.

Here, the first pipeline 33a includes a three-way joining pipe, one of which is connected to the burner body 31, and the other pair of pipes is connected to the fuel tank 51. 1) and the air pump 71 (FIG. 1), respectively. The second pipeline 38a forms a short pipe form that substantially connects the reactor body 36 and the stack 10 (FIG. 1). The third pipe line 33b forms a single pipe form pipe that substantially connects the burner body 31 with the outside. In addition, the fourth pipe line 38b forms a single pipe line that substantially connects the reactor body 38 and the fuel tank 51.

In the present invention configured as described above, it provides a heat treatment means 40 for controlling the thermal energy of the reformer 30, the heat treatment means 40 is the burner portion 35 through the first pipeline (33a) ) Preheats the fuel and air by using latent heat of evaporation due to the temperature difference between the fuel and air, and reduces the temperature of the hydrogen gas discharged from the reforming reaction unit 39 through the second pipeline 38a. Will be

In the heat treatment means 40 according to the present embodiment, the first pipeline 33a connected to the burner body 31 is installed in contact with the second pipeline 38a in the reformer 30 configured as mentioned above. It is made of a structure.

More specifically, the heat treatment means 40 has a structure in which a first pipe line 33a through which fuel and air join is wound in a spiral form along the length direction of the second pipe line 38a. Herein, the fuel is maintained at a temperature of about 20 to 25 ° C., which is relatively higher than air, and the air is preferably maintained at a temperature of about 10 to 15 ° C.

The operation of the fuel cell system according to the first embodiment of the present invention configured as described above will be described in detail as follows.

First, the fuel pump 53 is operated to discharge the liquid fuel stored in the fuel tank 51, and the fuel is supplied into the burner body 31 through the first pipeline 33a.

At the same time, the air pump 71 is operated to supply air into the burner body 31 through the first pipeline 33a.

The fuel and air then undergo an oxidation reaction while passing through an oxidation catalyst 32 inside the burner body 31. During this time, the burner part 35 burns fuel and air through the oxidation reaction to generate a heat source having a predetermined temperature range required for the reforming reaction of the reforming reaction part 39. The heat source is transferred to the reforming catalyst 37 through the reactor body 36 of the reforming reaction unit 39. At this time, the combustion gas generated when the fuel and the air are combusted in the burner body 31 is discharged to the outside through the third pipeline 33b while maintaining a relatively high temperature.

In this state, the fuel stored in the fuel tank 51 is supplied into the reactor body 36 through the fourth pipeline 38b by the operation of the fuel pump 53. Then, the fuel undergoes the reforming reaction while passing through the reforming catalyst 37. At this time, the reforming catalyst 37 receives a heat source generated from the burner unit 35 and maintains a predetermined reaction start temperature necessary for reforming the fuel. In the meantime, in the reforming reaction section 39, the decomposition reaction of the fuel by the reforming catalyst 37 (endothermic reaction) proceeds to generate hydrogen gas containing carbon dioxide and hydrogen.

The hydrogen gas is then discharged from the reactor body 36, which is supplied to the electricity generator 11 of the stack 10 via the second pipeline 38a while maintaining a relatively high temperature.                     

During this process, fuel and air are continuously supplied through the first pipeline 33a, and the first pipeline 33a is spirally contacted with the second pipeline 38a. As soon as fuel and air are joined at the joining point of the first pipeline 33a, evaporation is promoted by the temperature difference between the fuel and the air, whereby the mixture of fuel and air is passed through the first pipeline 33a. As the hydrogen gas passes, the latent heat of evaporation is taken from the heated second pipeline 38a to reduce the temperature of the hydrogen gas. Then, the hydrogen gas is supplied to the electricity generating unit 11 of the stack 10 in a state of being cooled to an appropriate temperature required by the stack 10, and the fuel and air passing through the first pipeline 38a are The latent heat of evaporation is absorbed and preheated to a temperature corresponding to the reaction start temperature of the oxidation catalyst 32. At this time, the hydrogen gas is supplied to the anode electrode of the membrane-electrode assembly 12 through the separator 16 of the electricity generator 11.

On the other hand, the air is supplied to the electricity generating unit 11 of the stack 10 by the operation of the air pump 71. The air is then supplied to the cathode of the membrane-electrode assembly 12 through the separator 16.

Therefore, in the anode, the hydrogen is decomposed into electrons and protons (hydrogen ions) through the oxidation of hydrogen. Then, the proton is moved to the cathode electrode through the electrolyte membrane of the membrane-electrode assembly 12, and electrons are not moved through the electrolyte membrane and neighboring the membrane-electrode through the separator 16 or a separate terminal portion (not shown). It is moved to the cathode electrode of the assembly 12, which generates a current in the flow of electrons. The cathode electrode generates heat and moisture at a predetermined temperature through a reduction reaction of hydrogen ions transferred to the cathode electrode through the electrolyte membrane and oxygen contained in the air.

As a result, the fuel cell system 100 according to the present invention can output electric energy of a predetermined output amount to a predetermined load, for example, a portable electronic device such as a laptop or a PDA, or a mobile communication terminal through such a series of processes.

5 is a perspective view schematically illustrating a reformer structure according to a second embodiment of the present invention, and FIG. 6 is a cross-sectional view of FIG. 5.

Referring to the drawings, the reformer 130 according to the present embodiment has a fuel and air in which a first pipeline 133a for supplying fuel and air to the burner unit 135 maintains a relatively high temperature from the burner unit 135. The heat treatment means 140 formed in contact with the third pipe line 133b for discharging the combustion gas is constituted.

In the present embodiment, the heat treatment means 140 preheats the fuel and air using latent heat of evaporation caused by the temperature difference between the fuel and the air supplied to the burner unit 135 through the first pipeline 133a, It is to function to reduce the temperature of the combustion gas discharged from the burner unit 135 through the three pipeline (133b). The heat treatment means 140 has a structure in which a first pipe line 133a through which fuel and air join is wound in a spiral form along a length direction of the third pipe line 133b.

Therefore, since fuel and air are continuously supplied through the first pipeline 133a, and the first pipeline 133a is installed in a spiral contact with the third pipeline 133b, the fuel and air At the moment of joining at the joining point of the first pipeline 133a, evaporation is promoted by the temperature difference between the fuel and the air, whereby the mixture of the fuel and the air has been described above through the first pipeline 133a. While the relatively hot combustion gas passes, the latent heat of evaporation is taken from the heated third pipeline 133b to reduce the temperature of the combustion gas. Then, the combustion gas is discharged to the outside through the third pipeline 133b while being cooled to an appropriate temperature, and the fuel and air passing through the first pipeline 138a absorb the latent heat of evaporation and oxidize. It is preheated to a temperature corresponding to the reaction initiation temperature of the catalyst 132.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications and changes can be made within the scope of the claims and the detailed description of the invention and the accompanying drawings. Naturally, it belongs to the scope of the invention.

According to the fuel cell system according to the present invention, since the heat treatment means for controlling the thermal energy of the entire reformer by using the latent heat of evaporation by the temperature difference between the fuel supplied to the burner and the air, the combustion gas generated through the oxidation reaction of the burner And / or thermal energy of hydrogen gas generated from the reforming reaction unit can be provided to the fuel and air supplied to the burner unit. Therefore, the temperature of the fuel and air supplied to the burner portion is raised to a temperature corresponding to the reaction start temperature of the burner portion, thereby further improving the combustion efficiency of the burner portion.                     

In addition, since the combustion gas generated through the oxidation reaction of the burner and / or the hydrogen gas generated from the reforming reaction part is cooled to an appropriate temperature, there is an effect of further improving the thermal efficiency and operating performance of the entire system.

Claims (15)

A burner unit generating heat energy through an oxidation catalytic reaction of fuel and air; A first pipeline connected to the burner to supply the fuel and air to the burner; A reforming reaction unit generating hydrogen gas from the fuel through the reforming catalytic reaction by the thermal energy; And A second pipeline connected to the reforming reaction unit for discharging the hydrogen gas from the reforming reaction unit; Including; The first pipeline is installed in contact with the second pipeline, The reformer having a structure in which the first pipeline is wound in a spiral form on the second pipeline. delete The method of claim 1, The reformer of the first and second pipelines made of a metal material. The method of claim 1, The fuel and air at a temperature lower than the fuel are supplied to the burner unit while joining the first pipeline, And a reformer having a structure in which the first pipeline is provided with latent heat of evaporation from the second pipeline while the fuel and air are evaporated. The method of claim 4, wherein A reformer having a temperature of 20 to 25 ° C. and air of 10 to 15 ° C. The method of claim 1, The burner unit includes a burner body and an oxidation catalyst formed on the burner body. The method of claim 1, The reforming reactor comprises a reactor body and a reforming catalyst formed in the reactor body. A burner unit generating heat energy through an oxidation catalytic reaction of fuel and air; A reforming reaction unit generating hydrogen gas from the fuel through the reforming catalytic reaction by the thermal energy; A first pipeline connected to the burner to supply the fuel and air to the burner; A second pipeline connected to the reforming reaction unit and configured to discharge the hydrogen gas from the reforming reaction unit; A third pipeline connected to the burner and configured to discharge combustion gas of the fuel and air combusted by the oxidation reaction; And A fourth pipeline connected to the reforming reaction unit for supplying fuel to the reforming reaction unit Including; The first pipeline is installed in contact with the third pipeline, The reformer having a structure in which the first pipeline is wound in a spiral form on the third pipeline. delete The method of claim 8, The reformer of the first and third pipelines made of a metal material. An electricity generator for generating electrical energy through an electrochemical reaction between hydrogen and oxygen; A reformer for generating hydrogen gas from the fuel through a chemical catalytic reaction by thermal energy; A fuel supply source for supplying fuel to the reformer; An air source for supplying air to the reformer and the electricity generator; And Heat treatment means for controlling the thermal energy provided to the reformer by using latent heat of evaporation generated by the temperature difference between the fuel and the air supplied to the reformer Including; The reformer, A burner unit for generating thermal energy through an oxidation catalytic reaction of fuel and air, A reforming reaction unit generating hydrogen gas from the fuel through a reforming catalytic reaction by the thermal energy; A first pipeline connected to the burner to supply the fuel and air to the burner; A second pipeline connected to the reforming reaction unit for discharging the hydrogen gas from the reforming reaction unit, The heat treatment means is a fuel cell system having a structure in which the first pipeline is wound in a spiral form on the second pipeline. The method of claim 11, The reformer, A third pipeline connected to the burner and configured to discharge combustion gas of the fuel and air combusted by the oxidation reaction; And a fourth pipeline connected to the reforming reaction unit to supply fuel to the reforming reaction unit. delete 13. The method of claim 12, The heat treatment means is a fuel cell system consisting of a structure in which the first pipeline is wound in a spiral form on the third pipeline. The method of claim 11, A fuel cell system comprising a plurality of said electric generators, and forming a stack by the aggregate structure of these electric generators.

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