JP4049526B2 - Method for starting reformer for fuel cell - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention raises the temperature of the catalyst layer of the carbon monoxide removal device in the fuel cell power generation device to a temperature equal to or higher than the reaction temperature, and raises the temperature of the catalyst layer of the reformer to the reforming reaction temperature. The present invention relates to a method for starting a reformer for a fuel cell.
[0002]
[Prior art]
A fuel cell power generation system is a power generation system that takes out electricity by reacting hydrogen and oxygen in air by introducing reformed gas rich in hydrogen gas and air from a reformer into the fuel cell. The reformed gas contains hydrogen, carbon dioxide, and carbon monoxide. Since carbon monoxide is a catalyst poison for the fuel cell, it must be removed. Therefore, a carbon monoxide removal device is required between the reformer and the fuel cell. Is provided. The carbon monoxide removing device includes a catalyst layer in order to remove carbon monoxide. The reformed gas from the reformer needs to pass through the catalyst layer in a state where the temperature of the catalyst layer in the carbon monoxide removing apparatus has risen to the reaction temperature.
Various methods are employed to raise the temperature of the catalyst layer from room temperature or a power generation stop state. For example, the reaction temperature of the transformer for removing carbon monoxide is in the range of 200 to 300 ° C., and there is a method of introducing nitrogen gas heated to this temperature into the catalyst layer. However, since the specific heat (heat capacity) of nitrogen gas is small, the temperature rise time is as long as 1 hour 30 minutes to 2 hours, and it is necessary to provide a new nitrogen gas cylinder when generating electricity on-site such as home use. Therefore, in terms of running cost, it is not feasible for home use.
[0003]
Japanese Patent Laid-Open No. 4-71169 provides a bypass circuit for directly introducing the reformed gas into the fuel chamber of the fuel cell without passing through the transformer as a method for starting the fuel cell power generator without using nitrogen gas. First, a reformed gas having a low carbon monoxide concentration is generated by increasing the ratio of water vapor in the reformer, and this is introduced into the fuel chamber through the bypass circuit to generate electric power. This is a method in which the catalyst temperature of the removal device is heated by a heater, and when the catalyst temperature of the fuel cell and the transformer is increased to a predetermined temperature, the reformed gas is stopped flowing to the bypass circuit and switched to steady operation. However, in this method, since the heater is used to raise the temperature of the transformer, it takes several hours for the temperature of the catalyst to reach the reaction temperature, and the carbon monoxide concentration in the reformed gas is equal to the ratio of water vapor. However, there is a problem that it is difficult to reduce it.
[0004]
Japanese Patent Application Laid-Open No. 5-275103 discloses that a mixed gas of water vapor and nitrogen gas is introduced into the reformer while the reformer is heated with a burner and the transformer is heated with a heater, and the mixed gas is heated. Describes a starting method for raising the temperature of a pipeline, a transformer, and a fuel cell power generation unit. This method has the advantages that the heat capacity is larger than that of nitrogen alone because steam is mixed with nitrogen gas, and that it is not necessary to perform steam purge. However, this method uses nitrogen gas and is not suitable for home use. Moreover, it is necessary to provide a heater in the transformer.
[0005]
Thus, in the fuel cell power generation, the time until the temperature of the catalyst layer of the carbon monoxide removal device reaches the predetermined reaction temperature is short, and it is not necessary to use expensive nitrogen gas, and the starting method is not yet known. .
[Patent Document 1]
Japanese Patent Laid-Open No. 04-071169 [Patent Document 2]
Japanese Patent Laid-Open No. 05-275103 [Patent Document 3]
Japanese Patent Laid-Open No. 08-050908 [Patent Document 4]
JP-A-11-149931 [0006]
[Problems to be solved by the invention]
The present invention has been made in view of the above problems, and the object thereof is not to provide a burner for heating the catalyst in the carbon monoxide removal device, the start-up time until steady operation is short, and the nitrogen gas It is an object of the present invention to provide a method for starting a fuel cell reforming apparatus that does not require the use of a fuel cell and therefore has low running costs.
[0007]
[Means for Solving the Problems]
The object is solved by providing the following method.
A reformer that reforms by reacting at least a raw gas and water vapor, and a reaction between the exhaust gas discharged from the reformed gas and water vapor or oxygen to remove carbon monoxide contained in the exhaust gas. a carbon monoxide oxidizer, wherein the reformer steam generator for generating steam to be supplied to, a method of starting a fuel cell reforming apparatus comprising, in the reformer ignites the reformer burner The first step of heating the catalyst layer, the temperature of the reformer catalyst layer, the exhaust gas discharged from the reformer through the reformer catalyst layer is the catalyst layer of the carbon monoxide removal device A second step of setting the temperature to a set temperature at which carbon is not deposited on the reformer catalyst layer from the raw gas, and the reformer catalyst layer is set to the setting temperature. after reaching the temperature, to introduce the raw fuel gas to the reformer Third step and the fourth step and the reformer catalyst layer is the set temperature for heating the carbon monoxide remover catalyst layer by introducing the exhaust gas to the carbon monoxide oxidizer than the reaction temperature after reaching a fifth step of introducing the steam into the reformer, the temperature of the reformer catalyst layer, and characterized in that it includes a sixth step of heating the reforming reaction temperature, the To start the reformer for the fuel cell.
A method for starting a fuel cell power generation apparatus, comprising the step of:
[0008]
2. The fuel cell reforming apparatus start-up method according to claim 1, wherein the steam is used after the reformer catalyst layer reaches the set temperature and the carbon monoxide removing device catalyst layer is 100 ° C. or higher. After that, the method for starting the reformer for the fuel cell is introduced into the reformer.
Since the start-up method of the present invention does not require the use of expensive nitrogen gas, the running cost of fuel cell power generation can be reduced, and the catalyst layer of the carbon monoxide removal device is preheated using conventional nitrogen gas. In this case, it took about 1 hour 30 minutes to 2 hours to raise the temperature to the reaction temperature of the catalyst layer, but it can be heated to a predetermined reaction temperature within 1 hour.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
In the fuel cell start-up method of the present invention, the heated raw fuel gas is introduced into the carbon monoxide removal apparatus, and the temperature of the catalyst layer of the carbon monoxide removal apparatus is heated to the reaction temperature or higher by the heat held by the gas. It is characterized by that.
In the present invention, the carbon monoxide removing device is a device that removes carbon monoxide with a catalyst. In the case of a solid polymer fuel cell, the device includes at least a carbon monoxide converter and a carbon monoxide remover. In the case of another fuel cell such as a phosphoric acid fuel cell, at least a carbon monoxide transformer is provided. The carbon monoxide converter is a device that reacts carbon monoxide with water vapor to convert it into carbon dioxide, and includes, for example, a Cu-based catalyst as a catalyst, and the reaction temperature is in the range of 200 to 300 ° C. The carbon monoxide remover is a device that adds air (oxygen) to the exhaust gas from the carbon monoxide converter and converts carbon monoxide to carbon dioxide based on a selective oxidation reaction. For example, Ru is used as a catalyst. And the reaction temperature is in the range of 120-200 ° C. The CO concentration is reduced to about 1% by the carbon monoxide transformer, and further reduced to about 10 ppm by the carbon monoxide remover.
[0010]
Therefore, in the present invention, heating the catalyst layer of the carbon monoxide removal device to a temperature higher than the reaction temperature means that the temperature of the catalyst layer of the carbon monoxide converter or the carbon monoxide converter and the carbon monoxide remover is It means that the temperature is raised above the reaction temperature. In the case of a polymer electrolyte fuel cell power generator, the reaction temperature of a carbon monoxide remover catalyst is usually lower than that of a carbon monoxide converter catalyst, and the carbon monoxide remover is a carbon monoxide converter. Because it is located on the downstream side, the raw fuel gas that has passed through the carbon monoxide converter passes the carbon monoxide remover and the temperature of the catalyst layer of the carbon monoxide remover is set to an appropriate reaction temperature. The temperature can be increased.
[0011]
The temperature of the catalyst layer of the reformer is such that the raw gas passing through the catalyst layer can heat the temperature of the catalytic layer of the carbon monoxide removing device to a reaction temperature or higher, and from the raw gas to the catalyst layer. However, the temperature range that satisfies this condition is 200 to 400 ° C.
The raw fuel gas that has passed through the catalyst layer of the reformer heated to the above temperature range causes the temperature of the catalyst layer of the carbon monoxide converter or the carbon monoxide converter and the carbon monoxide remover to be relatively short. The temperature can be raised above the reaction temperature. The set temperature of the catalyst layer of the reformer is preferably 250 to 300 ° C.
[0012]
Next, the activation method of the present invention will be described sequentially. First, a method for continuously introducing the raw fuel gas (hereinafter sometimes referred to as “first method”) will be described.
In the first method, first, the reformer burner is ignited to heat the reformer catalyst layer, the temperature of the catalyst layer of the reformer is changed, and the raw gas passing through the catalyst layer is converted to the catalyst of the carbon monoxide removal apparatus. The temperature of the layer can be heated to the reaction temperature or higher, and is maintained at a set temperature at which carbon is not deposited on the catalyst layer from the raw gas. The introduction of the raw fuel gas to the reformer may be performed simultaneously with the ignition of the burner, or when the temperature of the catalyst layer of the reformer reaches the set temperature, or when the burner ignition and the set temperature are reached. It can be at any point in time. From the viewpoint of shortening the starting time, it is preferable to introduce the raw fuel gas when the burner is ignited.
The temperature of the catalyst layer of the carbon monoxide removal device is raised to the reaction temperature or higher by the raw fuel gas that has passed through the reformer catalyst layer maintained at the set temperature. During this time, the temperature of the catalyst of the reformer may be constant or may be raised within the set temperature range.
[0013]
When the temperature of the catalyst layer of the carbon monoxide removing apparatus becomes equal to or higher than the reaction temperature, the temperature of the catalyst layer of the reformer is raised (further). As the temperature rises, it reaches a temperature at which carbon is deposited from the raw gas into the reformer catalyst layer, but at least at this point, in order not to deposit carbon in the reformer catalyst layer, steam is introduced into the reformer, The raw fuel gas mixed with water vapor is introduced into the carbon monoxide removal device. For example, when the temperature of the catalyst layer of the carbon monoxide removal apparatus reaches the reaction temperature, water vapor can be introduced. At this time, since the temperature of the catalyst layer of the carbon monoxide removing device exceeds the dew point, water vapor does not condense. Then, the temperature of the catalyst layer of the reformer is further raised to the reforming reaction temperature. It should be noted that the introduction of water vapor can be performed at any time when the temperature of the catalyst layer of the carbon monoxide removal apparatus reaches 100 ° C. or higher.
In the first method, approximately 10 to 40 minutes from the burner ignition until the catalyst layer temperature of the carbon monoxide removal device reaches the reaction temperature, and the time from this point until the reformer catalyst reaches the reforming reaction temperature is approximately 5 to 15 minutes, and the time from the burner ignition until the reformer catalyst reaches the reforming reaction temperature, that is, the startup time is within 1 hour.
[0014]
Next, a method for introducing the raw fuel gas discontinuously into the carbon monoxide removal apparatus (hereinafter, sometimes referred to as “second method”) will be described.
In the second method, the reformer burner is first ignited to heat the catalyst layer of the reformer. Next, the temperature of the catalyst layer of the reformer is such that the raw fuel gas that has passed through the catalyst layer can heat the temperature of the catalyst layer of the carbon monoxide removal device to a reaction temperature or higher, and from the raw fuel gas. When a set temperature at which carbon is not deposited on the catalyst layer is reached, the raw gas is introduced into the reformer. With the temperature of the catalyst layer of the reformer maintained at the set temperature, the exhaust gas from the reformer is introduced into the carbon monoxide removal device until the catalyst layer temperature of the carbon monoxide removal device reaches the reaction temperature. However, after reaching it, the introduction of nuclear fuel gas will be cut off. Thereafter, the temperature of the catalyst layer of the reformer is raised, and steam is introduced into the reformer immediately before reaching the temperature at which carbon is deposited from the raw gas in the catalyst layer of the reformer. This steam introduction is to prevent carbon from being deposited from the raw gas that may remain in the reformer. Thereafter, the temperature of the catalyst layer of the reformer is further raised to the reforming reaction temperature.
The second method has the advantage that the deposition of carbon is easier to prevent than the first method because the consumption of the raw fuel gas can be reduced because the raw fuel gas is not continuously flowed.
Further, in the second method, approximately 20 to 40 minutes from the burner ignition to the time when the catalyst layer temperature of the carbon monoxide removal device reaches the reaction temperature, approximately 10 minutes or less from this point to the introduction of steam, The time until the mass catalyst reaches the reaction temperature is approximately 10 minutes or less, and the time from the burner ignition until the reformer catalyst reaches the reforming reaction temperature, that is, the startup time is within 1 hour.
It is appropriate that the fuel gas in the start-up operation of the present invention is approximately 10 to 100% consumed in the steady operation.
[0015]
In the start-up method of the present invention, the catalyst layer temperature of the carbon monoxide removal apparatus is heated by the heated nuclear fuel gas, and nitrogen gas is not used. Therefore, the running cost of power generation by the fuel cell is low, and the start-up time is Compared to the conventional time of 1 hour 30 minutes to 2 hours, the time is shortened to within 1 hour.
Also in the first and second methods, when introducing steam into the reformer, it is necessary that the steam does not condense in the carbon monoxide removal apparatus. In any of the methods, when the steam is introduced into the reformer, the temperature of the catalyst layer of the carbon monoxide removing apparatus is equal to or higher than the reaction temperature, that is, 100 ° C. or higher.
[0016]
Next, a fuel cell power generator to which the starting method of the present invention is applied will be described. FIG. 1 is a conceptual diagram of a power generation system using a polymer electrolyte fuel cell. In FIG. 1, 1 is a fuel gas, 2 is a desulfurizer, 3 is a reformer, 4 is a carbon monoxide converter, 5 is a carbon monoxide remover, 6 is a polymer electrolyte fuel cell, and 10 is a booster pump. , 12 is a reformer burner, 13 is a raw gas pipe, 14 is a blower, 17 is a heat exchanger, 21 is a water tank, 22 is a pump, 34 is a PG (process gas) burner, 35 is a conduit, and 36 is open / close Reference numeral 45 denotes exhaust gas, 46 denotes a heat exchanger, 91 and 92 denote on-off valves, and 98 denotes a hot water storage tank.
[0017]
At the time of startup, also in the first method and the second method, the raw fuel gas 1 desulfurized by the desulfurizer 2 is first sent to the burner 12 through the pipe 13 and mixed with the air from the blower 14. The reformed catalyst layer is heated to the set temperature. As the raw fuel gas, natural gas, city gas, methanol, LPG, butane, or the like is used.
In the first method, the raw fuel gas may be introduced at the same time as the ignition of the burner, when the temperature of the catalyst layer reaches the set temperature, or at any stage where this temperature is reached. In the second method, the raw fuel gas is introduced when the temperature of the reformer catalyst layer reaches the set temperature. Reference numeral 10 denotes a booster pump for sending the raw fuel gas to the reformer.
The raw fuel gas that has passed through the reformer catalyst layer raises the temperature of the catalyst layers of the carbon monoxide removal apparatus, that is, the carbon monoxide converter 4 and the carbon monoxide remover 5, to the reaction temperature. Since the on-off valve 91 is closed and 36 is open, the raw fuel gas that has passed through the carbon monoxide removing device enters the PG burner 34 through the pipe 35 and burns with the air from the blower 37, and in the heat exchanger 46. After exchanging heat with the water from the hot water storage tank 98, the exhaust gas 45 is obtained. Heat exchangers 18, 19, and 20 are installed between the reformer 3 and the carbon monoxide converter 4, between the carbon monoxide converter 4 and the carbon monoxide remover 5, and downstream of the remover. However, at the time of start-up, it is preferable to stop the pumps 23, 24 and 25 to stop the supply of water or to flow at a minimum flow rate.
[0018]
In the first method, after the temperature of the catalyst layer of the carbon monoxide removal apparatus reaches the reaction temperature, the temperature of the catalyst layer of the reformer is further raised. In this process, the catalyst layer of the reformer Therefore, it is necessary to introduce water vapor into the reformer at least before this temperature is reached. The reformer catalyst layer is further heated until reaching the reforming reaction temperature. As will be described later, the exhaust gas from the carbon monoxide removal device becomes exhaust gas after passing through the heat exchanger 46 as described above until the reformed gas composition is stabilized.
Further, in the second method, the introduction of the raw gas into the carbon monoxide removal apparatus is temporarily stopped when the temperature of the catalyst layer of the apparatus reaches the reaction temperature, and the temperature of the reformer catalyst layer is changed during the steady operation. It is reintroduced at a temperature slightly lower than the set catalyst layer temperature. This is because an overshot in the temperature control of the reformer catalyst layer is taken into consideration. This temperature is 550 to 750 ° C, preferably 620 to 680 ° C.
[0019]
The introduction of water vapor into the reformer is performed by supplying water from the water tank 21 to the heat exchanger 17 connected to the reformer via the pump 22 and evaporating the water vapor with the heat exchanger 17. It is carried out by introducing it into the raw gas line to the pledge.
In the first and second methods, the reaction set temperature of the reformer is 650 to 800 ° C, preferably 700 to 750 ° C.
[0020]
Since the reformed gas cannot be introduced into the fuel cell 6 until the gas composition is stabilized, the temperatures of the catalyst layers of the reformer 3, the carbon monoxide converter 4, and the carbon monoxide remover 5 are stabilized. Until the on-off valve 91 is closed, the on-off valve 36 is opened, and the reformed gas from the carbon monoxide remover is sent to the PG (process gas) burner through the pipe 35 and is supplied by the blower 37. The combustion gas passes through the heat exchanger 46, exchanges heat with water from the hot water storage tank 98, and is then exhausted as exhaust gas 45.
When the temperature of each catalyst layer of the carbon monoxide converter 4 and the carbon monoxide remover 5 is stabilized, the on-off valve 36 is closed and the on-off valve 91 is opened, and the reformed gas from the carbon monoxide remover 5 is supplied to the fuel cell. Then, air is introduced into the air electrode (cathode) 6b into the fuel electrode (anode) 6a and power generation is started. Until the temperature of the fuel cell 6 is stabilized, the on-off valve 39 is opened, the on-off valve 92 is closed, and the gas from the fuel cell 6 is supplied to the PC burner. At the time of shifting to stable steady operation, the on-off valves 91 and 92 are opened, the on-off valves 36 and 39 are closed, and the unreacted gas that has passed through the anode 6a of the fuel cell is supplied to the burner 12 through the conduit 15. . Unreacted gas is burned in the burner in all amounts, but if this alone cannot keep the temperature of the reformer catalyst layer at the reforming reaction temperature, the raw fuel gas is supplied to the burner 12. Since the temperature of the air exhausted from the cathode rises due to the exothermic reaction of the fuel cell main body 6, it is exhausted after passing through the heat exchanger 27 via the pipe line 26.
[0021]
Further, heat from the reformed gas and heat from the fuel cell are recovered using each heat exchanger and supplied as hot water. The water from the water tank 21 is circulated by the pumps 23, 24 and 25 through the heat exchangers 18, 19 and 20 provided in the line connecting the reformer and the fuel cell. The quality gas is cooled while the water in the water tank 21 is heated. The water in the water tank 21 is circulated in the heat exchanger 41 by the pump 42 to exchange heat with the water in the hot water storage tank. Further, the exhaust gas from the cathode 6b passes through the heat exchanger 27 connected to the gas pipe 26 and exchanges heat with water passing through the heat exchanger 27. Water from the hot water storage tank 98 circulates in the heat exchanger 27 by the pump 28, in the heat exchanger 32 by the pump 33, in the heat exchanger 41 by the pump 43, and in the heat exchanger 46 by the pump 47. Heated. Further, the water in the water tank 21 is circulated through the pump 48 to the cooling unit 6 c of the fuel cell 6.
A heat exchanger 32 is connected to the exhaust gas conduit 31 from the reformer, and water from the hot water storage tank 98 is circulated through the pump 33 to the heat exchanger 32 to recover exhaust heat.
[0022]
In the above description, the polymer electrolyte fuel cell power generation system has been described. However, in the phosphate fuel cell power generation system, the temperature of the catalyst layer of the carbon monoxide removal apparatus can be increased in a short time by the same startup operation method. Can do. In other words, the phosphate fuel cell power generation system is different in that a carbon monoxide remover is not provided and only a carbon monoxide transformer is provided.
[0023]
【Example】
EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples. However, the present invention is not limited to these examples.
Example 1 (first method)
A start-up operation was performed using a polymer electrolyte fuel cell power generation system as shown in FIG. Ru, Cu-Zn, and Ru were used as the reformer catalyst, carbon monoxide shifter catalyst, and carbon monoxide remover catalyst, respectively. In addition, the fuel gas that has passed through the reformer catalyst layer can heat the catalyst layer of the carbon monoxide removal device to a temperature higher than the reaction temperature, and the carbon is not deposited on the catalyst layer from the fuel gas. The temperature was 300 ° C.
The fuel gas was supplied to the burner and ignited, and the fuel gas was introduced into the reformer. The flow rate of the raw fuel gas supplied to the reformer was 100% of the raw fuel gas required for steady operation of the fuel cell power generator. When the temperature of the reformer catalyst layer reached 300 ° C., steam was introduced into the reformer. Further, the same amount of the raw fuel gas was kept flowing, and the reformer catalyst layer was heated by the burner until the temperature of the catalyst layer reached the reforming reaction temperature.
In 40 minutes, the temperature of the carbon monoxide converter catalyst layer and the temperature of the carbon monoxide remover catalyst layer reached the reaction temperature. From this point, the time required for the temperature of the reformer catalyst layer to reach the reforming reaction temperature was 15 minutes, and the time required for start-up operation was 60 minutes.
[0024]
Example 2 (second method)
The start-up operation was performed using the same polymer electrolyte fuel cell power generator as in Example 1. The set temperature was 280 ° C.
The raw fuel gas was supplied to the burner and ignited to heat the reformer catalyst layer. When the temperature of the catalyst layer reached the set temperature, the raw fuel gas was introduced into the reformer. The flow rate of the raw fuel gas supplied to the reformer was 100% of the raw fuel gas required for steady operation of the fuel cell power generator. When the temperature of the carbon monoxide converter and the carbon monoxide remover reaches the reaction temperature, the supply of the raw gas is stopped, and when the temperature of the reformer catalyst layer reaches 300 ° C., steam is supplied to the reformer. Introduced. The reformer catalyst was heated until the reformer catalyst reached the reforming reaction temperature, and the startup operation was continued.
45 minutes until the temperature of the carbon monoxide converter and carbon monoxide remover reaches the reaction temperature, 1 minute from this point to the introduction of steam, and the time from the introduction of steam to the reaction temperature of the reformer catalyst being 10 minutes. Minutes, and the time required for the start-up operation was 60 minutes.
[0025]
【The invention's effect】
Since the start-up method of the present invention does not require the use of expensive nitrogen gas, the running cost of fuel cell power generation can be reduced, and the catalyst layer of the carbon monoxide removal device is preheated using conventional nitrogen gas. In this case, it took about 1 hour 30 minutes to 2 hours to raise the temperature to the reaction temperature of the catalyst layer, but it can be heated to a predetermined reaction temperature within 1 hour.
[Brief description of the drawings]
FIG. 1 is a conceptual diagram showing an example of a fuel cell power generator in which a starting method of the present invention is used.
[Explanation of symbols]
1 Nuclear Fuel Gas 3 Reformer 4 Carbon Monoxide Transformer 5 Carbon Monoxide Remover 6 Fuel Cell

Claims (2)

A reformer that reforms by reacting at least a raw gas and water vapor, and a reaction between the exhaust gas discharged from the reformed gas and water vapor or oxygen to remove carbon monoxide contained in the exhaust gas. A method for starting a reformer for a fuel cell, comprising: a carbon monoxide removing device; and a steam generator for generating steam to be supplied to the reformer ,
A first step of igniting the reformer burner and heating the catalyst layer of the reformer ;
The temperature of the reformer catalyst layer may be such that the exhaust gas discharged from the reformer through the reformer catalyst layer heats the temperature of the catalyst layer of the carbon monoxide removal device to a reaction temperature or higher. A second step which is possible and is set to a set temperature at which carbon is not deposited from the raw gas into the reformer catalyst layer ;
A third step of introducing the raw gas into the reformer after the reformer catalyst layer reaches the set temperature ;
A fourth step of heating the carbon monoxide remover catalyst layer by introducing the exhaust gas to the carbon monoxide oxidizer than the reaction temperature,
A fifth step of introducing the steam into the reformer after the reformer catalyst layer has reached the set temperature ;
A sixth step of heating the temperature of the reformer catalyst layer to a reforming reaction temperature ;
A method for starting a reformer for a fuel cell , comprising : In the starting method of the reformer for a fuel cell according to claim 1,
The steam is introduced into the reformer after the reformer catalyst layer reaches the set temperature and after the carbon monoxide removal device catalyst layer reaches 100 ° C. or higher. A method for starting a reformer for a fuel cell.

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