Method for producing liquid fuel

Abstract

To provide a method for producing liquid fuel capable of achieving high efficiency in the entire system.SOLUTION: A method for producing liquid fuel comprises a hydrogen inventory checking step of checking a hydrogen inventory, a gasification step of generating synthesis gas from a biomass raw material, an electrolysis step of generating hydrogen from water with electric power of renewable energy, and a liquid fuel production step of producing liquid fuel using the synthesis gas generated in the gasification step and the hydrogen generated in the electrolysis step as raw materials. In the liquid fuel production step, when the H2 / CO ratio is not less than a target lower limit value, after reducing a steam supply amount, when the H2 / CO ratio becomes equal to or less than the target lower limit value, the hydrogen inventory is determined, when there is no hydrogen inventory, the steam supply amount is returned to the previous one, when there is a hydrogen inventory, the steam supply amount is reduced until the carbon monoxide generation amount does not increase, when the carbon monoxide does not increase, the steam supply amount is returned to the previous one, hydrogen is supplied so that the H2 / CO ratio becomes equal to the target lower limit value, and the hydrogen inventory is checked.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a method for producing liquid fuel. [Background technology]

[0002] In recent years, electrosynthetic fuels, which are made from hydrogen generated using electricity generated by renewable energy sources and carbon sources such as biomass and carbon dioxide emitted from factories, have been attracting attention as an alternative to fossil fuels.

[0003] The general procedure for producing liquid fuels such as methanol and gasoline using biomass as a feedstock is as follows: a gasification process in which biomass feedstock that has undergone a specified pretreatment is gasified together with hydrogen, oxygen, and steam in a gasifier to produce a synthesis gas containing hydrogen and carbon monoxide; a cleaning process in which the synthesis gas that has been produced is cleaned and tar is removed; an H2 / CO ratio adjustment process in which the H2 / CO ratio of the synthesis gas that has undergone the cleaning process is adjusted to a target ratio corresponding to the liquid fuel to be produced; a desulfurization process in which sulfur components are removed from the synthesis gas that has undergone the H2 / CO ratio adjustment process; and a fuel production process in which liquid fuel is produced from the synthesis gas that has undergone the desulfurization process. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2021-147504 Summary of the Invention [Problem to be solved by the invention]

[0005] In the gasification process, biomass undergoes pyrolysis, producing a mixed gas containing hydrogen, carbon monoxide, carbon dioxide, methane, and other gases. Of the gases produced by pyrolysis, hydrogen and carbon monoxide are used as raw materials for liquid fuel. When producing liquid fuel from hydrogen and carbon monoxide, it is necessary to control the H2 / CO ratio to an appropriate value. If the H2 / CO ratio can be controlled within an appropriate range and the gasifier can be operated under conditions that maximize the amount of carbon monoxide produced within that range, the yield of liquid fuel can be maximized.

[0006] The present invention has been made in consideration of the above-mentioned problems, and aims to provide a method for producing liquid fuel that can achieve efficiency throughout the entire system, thereby contributing to improved quality control in the production process and ultimately to energy efficiency. [Means for solving the problem]

[0007] In order to achieve the above object, the present invention provides the following means. [1] A liquid fuel production method for producing liquid fuel from biomass feedstock, a hydrogen inventory confirmation step of confirming the hydrogen inventory; a gasification step for producing synthesis gas from biomass feedstock; an electrolysis process that produces hydrogen from water using electricity generated using renewable energy; a liquid fuel production process for producing liquid fuel using the synthesis gas produced in the gasification process and the hydrogen produced in the electrolysis process as raw materials, In the liquid fuel production process, when the H2 / CO ratio is not less than the target lower limit, the amount of steam supplied is reduced, and then when the H2 / CO ratio becomes equal to or less than the target lower limit, the amount of hydrogen stock is determined; If there is no hydrogen in stock, the steam supply will be returned to the previous level. A method for producing liquid fuel in which, when there is hydrogen stock, the amount of steam supply is reduced until the amount of carbon monoxide produced stops increasing, and when the amount of carbon monoxide production stops increasing, the amount of steam supply is returned to the previous level, hydrogen is supplied so that the H2 / CO ratio is equal to the target lower limit, and the hydrogen stock is checked.

[0008] The present invention can achieve the target range of H2 / CO ratio and maximize the amount of carbon monoxide regardless of the presence or absence of hydrogen, the operating conditions of the gasifier, or the type of biomass used.

[0009] [2] In the liquid fuel production process, if there is no hydrogen in stock, the water vapor supply amount is adjusted to be halfway between the initial water vapor supply amount and the current water vapor supply amount, and hydrogen is supplied so that the H2 / CO ratio becomes equal to the target lower limit value. The adjustment of the water vapor supply amount is repeated until hydrogen is in stock.

[0010] The present invention can achieve the target range of H2 / CO ratio and maximize the amount of carbon monoxide regardless of the presence or absence of hydrogen, the operating conditions of the gasifier, or the type of biomass used.

[0011] [3] A liquid fuel manufacturing method for manufacturing liquid fuel from biomass feedstock, a hydrogen inventory confirmation step of confirming the hydrogen inventory; a gasification step for producing synthesis gas from biomass feedstock; an electrolysis process that produces hydrogen from water using electricity generated using renewable energy; a liquid fuel production process for producing liquid fuel using the synthesis gas produced in the gasification process and the hydrogen produced in the electrolysis process as raw materials, The method for producing liquid fuel, in the liquid fuel production step, increases the amount of steam supply when the H2 / CO ratio is less than a target lower limit, and when the amount of carbon monoxide produced increases, repeats increasing the amount of steam supply until the amount of carbon monoxide produced stops increasing, decreases the amount of steam supply when the amount of carbon monoxide produced does not increase, and returns the amount of steam supply to the previous level when the amount of carbon monoxide produced does not increase, supplies hydrogen so that the H2 / CO ratio becomes equal to the target lower limit, and checks the amount of hydrogen inventory.

[0012] The present invention can achieve the target range of H2 / CO ratio and maximize the amount of carbon monoxide regardless of the presence or absence of hydrogen, the operating conditions of the gasifier, or the type of biomass used.

[0013] [4] In the liquid fuel production process, if there is no hydrogen stock, the water vapor supply amount is adjusted to be halfway between the initial water vapor supply amount and the current water vapor supply amount, hydrogen is supplied so that the H2 / CO ratio becomes equal to the target lower limit value, and adjustment of the water vapor supply amount is repeated until the hydrogen supply amount becomes less than the hydrogen production amount.

[0014] The present invention can achieve the target range of H2 / CO ratio and maximize the amount of carbon monoxide regardless of the presence or absence of hydrogen, the operating conditions of the gasifier, or the type of biomass used.

[0015] [5] A method for producing a liquid fuel according to [3], wherein, in the liquid fuel production process, if the amount of carbon monoxide produced does not increase, the amount of steam supplied is reduced; if the amount of carbon monoxide produced increases, hydrogen is supplied so that the H2 / CO ratio becomes equal to the target lower limit; and if there is no hydrogen inventory, the amount of steam supplied is returned to the previous level, and hydrogen is supplied so that the H2 / CO ratio becomes equal to the target lower limit.

[0016] The present invention can achieve the target range of H2 / CO ratio and maximize the amount of carbon monoxide regardless of the presence or absence of hydrogen, the operating conditions of the gasifier, or the type of biomass used. [Effects of the Invention]

[0017] According to the present invention, it is possible to provide a method for producing liquid fuel that can improve the efficiency of the entire system. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is a diagram showing the configuration of a fuel production system used in a liquid fuel production method according to an embodiment of the present invention. [Figure 2] 1 is a flow diagram showing a method for producing a liquid fuel according to an embodiment of the present invention. [Figure 3] 1 is a flow diagram showing a method for producing a liquid fuel according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0019] Hereinafter, a method for producing a liquid fuel according to one embodiment of the present invention will be described with reference to the drawings.

[0020] [Fuel production system] FIG. 1 is a diagram showing the configuration of a fuel production system used in a liquid fuel production method according to one embodiment of the present invention. As shown in FIG. 1, the fuel production system 1 includes a biomass raw material supply device 2 that supplies biomass raw material, a gasification device 3 that gasifies the biomass raw material supplied from the biomass raw material supply device 2 to produce synthesis gas containing hydrogen and carbon monoxide, a liquid fuel production device 4 that produces liquid fuel using the synthesis gas supplied from the gasification device 3 and the hydrogen produced by an electrolysis device 60 as raw materials, a power generation facility 5 that generates electricity using renewable energy, a hydrogen generation and supply device 6 that generates hydrogen and oxygen from water using the electricity generated in the power generation facility 5 and supplies the produced hydrogen and oxygen to the gasification device 3, and a control device 7 that controls the gasification device 3, the power generation facility 5, and the hydrogen generation and supply device 6, and liquid fuel is produced from the biomass raw material using these components.

[0021] The biomass raw material supply device 2 performs predetermined pre-processing on biomass raw materials such as rice grains, bagasse, and wood, and supplies the pre-processed biomass raw materials to the gasification furnace 30 of the gasification device 3 via the raw material supply path 20. Here, the pre-processing of the biomass raw materials includes, for example, a drying process for drying the raw materials and a crushing process for crushing the raw materials.

[0022] The gasification apparatus 3 includes a gasification furnace 30 that gasifies the biomass raw material supplied via the raw material supply path 20, a gasification furnace sensor group 31 consisting of a plurality of sensors that detect the internal condition of the gasification furnace 30, a water supply device 32 that supplies water into the gasification furnace 30, an oxygen supply device 33 that supplies oxygen or air into the gasification furnace 30, a heating device 34 that heats the gasification furnace 30, a CO sensor 35 that measures the concentration of carbon monoxide contained in the synthesis gas discharged from the gasification furnace 30, a scrubber 36 that cleans the synthesis gas discharged from the gasification furnace 30, and a desulfurization device 37 that removes sulfur components from the synthesis gas cleaned by the scrubber 36 and supplies the cleaned synthesis gas to the liquid fuel production apparatus 4.

[0023] The water supply device 32 supplies water stored in a water tank (not shown) into the gasifier 30. The oxygen supply device 33 supplies oxygen stored in an oxygen tank (not shown) into the gasifier 30. The heating device 34 heats the gasifier 30 by consuming fuel supplied from a fuel tank (not shown) and electricity supplied from a power source (not shown). The amount of water supplied from the water supply device 32 to the gasifier 30, the amount of oxygen supplied from the oxygen supply device 33 to the gasifier 30, and the amount of heat input from the heating device 34 to the gasifier 30 are controlled by the control device 7. Note that in the fuel production system 1, there are cases where it is not necessary to actively supply water from the water supply device 32 to the gasifier 30 by supplying hydrogen from the hydrogen generation and supply device 6 (described below) into the gasifier 30 or into the raw material supply path 20. In this case, the water supply device 32 can be omitted from the fuel production system 1.

[0024] When water, oxygen, heat, etc. are fed into the gasification furnace 30, which has been charged with biomass raw material, using the water supply device 32, oxygen supply device 33, and heating device 34 described above, a total of 10 types of gasification reactions and their reverse reactions, such as those shown in the following formulas (1-1) to (1-5), proceed within the gasification furnace 30, and synthesis gas containing hydrogen and carbon monoxide is produced.

[0025] [ka]

[0026] The gasification furnace sensor group 31 is composed of, for example, a pressure sensor that detects the pressure inside the gasification furnace 30, a temperature sensor that detects the temperature inside the gasification furnace 30, an H2 / CO sensor that detects the H2 / CO ratio corresponding to the ratio of hydrogen to carbon monoxide in the synthesis gas inside the gasification furnace 30, and a CO2 sensor that detects carbon dioxide inside the gasification furnace 30. Detection signals from these sensors that make up the gasification furnace sensor group 31 are sent to the control device 7.

[0027] The gasification device 3 mixes the synthesis gas generated by the gasification reactions shown in the above formulas (1-1) to (1-5) and the reverse reaction thereof with hydrogen supplied from a hydrogen generation and supply device 6 described below, thereby adjusting the H2 / CO ratio of the synthesis gas to a predetermined target ratio corresponding to the liquid fuel to be produced (for example, when producing methanol, the target H2 / CO ratio is 2), and then supplies this synthesis gas to the liquid fuel production device 4.

[0028] The liquid fuel production device 4 is equipped with a methanol synthesis device, an MTG (Methanol To Gasoline) synthesis device, an FT (Fischer Tropsch) synthesis device, an upgrading device, etc., and by using these, liquid fuels such as methanol and gasoline are produced from synthesis gas adjusted to a predetermined H2 / CO ratio in the gasification device 3.

[0029] The power generation facility 5 is composed of a wind power generation facility that generates electricity using wind power, which is a renewable energy, a solar power generation facility that generates electricity using sunlight, which is also a renewable energy, etc. The power generation facility 5 is connected to a hydrogen generation and supply device 6, and electricity generated using renewable energy in the wind power generation facility, solar power generation facility, etc. can be supplied to the hydrogen generation and supply device 6. The power generation facility 5 is also connected to a commercial power grid 8. As a result, some or all of the electricity generated in the power generation facility 5 can be supplied to the commercial power grid 8 and can also be sold to an electric power company.

[0030] The hydrogen generation and supply device 6 includes an electrolysis device 60, a hydrogen filling pump 61, a hydrogen tank 62, a pressure sensor 63, and a hydrogen supply pump 64, and uses these to generate hydrogen using electricity supplied from the power generation equipment 5, and supplies the generated hydrogen to the gasification device 3.

[0031] The electrolysis device 60 is connected to the power generation facility 5, and generates hydrogen and oxygen from water by electrolysis using power supplied from the power generation facility 5. The electrolysis device 60 is also connected to the commercial power grid 8. This allows the electrolysis device 60 to generate hydrogen and oxygen not only using power supplied from the power generation facility 5, but also using power supplied from the commercial power grid 8 by purchasing power from an electric power company. The amounts of hydrogen and oxygen generated by the electrolysis device 60 are controlled by the control device 7.

[0032] The hydrogen filling pump 61 compresses the hydrogen produced by the electrolysis device 60 and fills it into the hydrogen tank 62. The amount of hydrogen filled by the hydrogen filling pump 61 is controlled by the control device 7. The hydrogen tank 62 stores the hydrogen compressed by the hydrogen filling pump 61. The pressure sensor 63 detects the internal tank pressure of the hydrogen tank 62 and sends a detection signal to the control device 7. The remaining amount of hydrogen in the hydrogen tank 62 is calculated by the control device 7 based on the detection signal of the pressure sensor 63. Therefore, in this embodiment, the hydrogen remaining amount acquisition means for acquiring the remaining amount of hydrogen in the hydrogen tank 62 is made up of the pressure sensor 63 and the control device 7.

[0033] The hydrogen supply pump 64 supplies hydrogen stored in the hydrogen tank 62 into the gasification furnace 30 of the gasification apparatus 3. The amount of hydrogen supplied from the hydrogen supply pump 64 into the gasification furnace 30 is controlled by the control device 7. Note that, although Fig. 1 illustrates a case in which hydrogen stored in the hydrogen tank 62 is supplied into the gasification furnace 30 by the hydrogen supply pump 64, the present invention is not limited to this. The hydrogen stored in the hydrogen tank 62 may be supplied upstream of the gasification furnace 30, more specifically, into the raw material supply path 20 for the biomass raw material.

[0034] The control device 7 is a computer that controls the amount of water supplied by the water supply device 32, the amount of oxygen supplied by the oxygen supply device 33, the amount of heat input by the heating device 34, the amount of hydrogen produced by the electrolysis device 60, the amount of hydrogen filled by the hydrogen filling pump 61, and the amount of hydrogen supplied by the hydrogen supply pump 64, based on detection signals from the gasification furnace sensor group 31 and detection signals from the pressure sensor 63 of the hydrogen tank 62, etc.

[0035] [Liquid fuel manufacturing method] (First embodiment) A liquid fuel production method according to one embodiment of the present invention is a liquid fuel production method for producing liquid fuel from biomass feedstock, and includes: a hydrogen inventory confirmation step of confirming hydrogen inventory; a gasification step of producing synthesis gas from the biomass feedstock; an electrolysis step of producing hydrogen from water using electricity generated using renewable energy; and a liquid fuel production step of producing liquid fuel using the synthesis gas produced in the gasification step and the hydrogen produced in the electrolysis step as raw materials. In the liquid fuel production step, if the H / CO ratio is not below a target lower limit, the steam supply rate is reduced, and then if the H / CO ratio becomes equal to or less than the target lower limit, the hydrogen inventory is determined. If there is no hydrogen inventory, the steam supply rate is returned to the previous level. If there is hydrogen inventory, the steam supply rate is reduced until the amount of carbon monoxide produced no longer increases, and if the amount of carbon monoxide produced no longer increases, the steam supply rate is returned to the previous level, and hydrogen is supplied so that the H / CO ratio becomes equal to the target lower limit, and the hydrogen inventory is confirmed.

[0036] The method for producing a liquid fuel according to this embodiment will be described with reference to FIG. 2 is a flowchart showing the specific steps of the method for producing liquid fuel according to this embodiment. It is confirmed whether the H2 / CO ratio of the synthesis gas generated in the gasification furnace 30 is below the target lower limit (step S1). If the H2 / CO ratio is not less than the target lower limit (if NO), the amount of steam supplied to the gasification apparatus 3 is reduced (step S2). Thereafter, it is confirmed whether the H2 / CO ratio is equal to or less than the target lower limit (step S3). If the H2 / CO ratio is equal to or lower than the target lower limit (YES), the hydrogen inventory amount is determined (step S4). If the H2 / CO ratio exceeds the target lower limit (if NO), the amount of steam supplied to the gasifier 3 is reduced (step S5), and the process returns to step S3 again. If there is hydrogen stock (YES) in step S4, the amount of steam supplied to the gasification apparatus 3 is reduced (step S6). If there is no hydrogen stock (NO in step S4), the steam supply rate is returned to the previous rate (step S7). In step S6, after the amount of steam supplied to the gasification apparatus 3 is reduced, it is determined whether the amount of carbon monoxide generated has increased (step S8). If the amount of carbon monoxide generated has increased (if YES), the process returns to step S6, and the amount of steam supplied to the gasification apparatus 3 is reduced. If the amount of carbon monoxide generated has decreased (if NO when the amount of carbon monoxide generated no longer increases), the amount of steam supplied is returned to the previous level (step S9). Thereafter, hydrogen is supplied to the gasification apparatus 3 so that the H2 / CO ratio becomes equal to the target lower limit (step S10). Thereafter, the hydrogen inventory amount is determined (step S11). In step S11, if there is hydrogen stock (YES), the current amount of hydrogen supplied to the gasification apparatus 3 is maintained. If there is no hydrogen stock (NO) in step S11, the amount of steam supplied to the gasifier 3 is adjusted to be midway between the initial amount of steam supplied and the current amount of steam supplied (step S12). Thereafter, hydrogen is supplied to the gasification apparatus 3 so that the H2 / CO ratio becomes equal to the target lower limit (step S13). Thereafter, the hydrogen inventory is determined (step S14). If there is hydrogen inventory (YES) in step S14, the current hydrogen supply rate to the gasification apparatus 3 is maintained. If there is no hydrogen inventory (NO) in step S14, the steam supply rate is repeatedly adjusted until there is hydrogen inventory.

[0037] According to the liquid fuel production method of this embodiment, it is possible to achieve the target range of the H / CO ratio and maximize the amount of carbon monoxide, regardless of the presence or absence of hydrogen, the operating conditions of the gasifier, or the type of biomass used. Therefore, it is possible to improve the efficiency of the entire liquid fuel production system.

[0038] (Second embodiment) A liquid fuel production method according to one embodiment of the present invention is a liquid fuel production method for producing liquid fuel from biomass feedstock, and includes: a gasification process for producing synthesis gas from biomass feedstock; an electrolysis process for producing hydrogen from water using electricity generated using renewable energy; and a liquid fuel production process for producing liquid fuel using the synthesis gas produced in the gasification process and the hydrogen produced in the electrolysis process as raw materials. In the liquid fuel production process, if the H2 / CO ratio is below a target lower limit, the steam supply rate is increased; if the amount of carbon monoxide produced increases, the steam supply rate is repeatedly increased until the amount of carbon monoxide produced stops increasing; if the amount of carbon monoxide produced does not increase, the steam supply rate is decreased; and if the amount of carbon monoxide produced does not increase, the steam supply rate is returned to the previous level; hydrogen is supplied so that the H2 / CO ratio becomes equal to the target lower limit; and hydrogen inventory is checked.

[0039] The method for producing a liquid fuel according to this embodiment will be described with reference to FIG. 3 is a flowchart showing the specific steps of the method for producing liquid fuel according to this embodiment. It is confirmed whether the H2 / CO ratio of the synthesis gas generated in the gasification furnace 30 is below the target lower limit (step S1). If the H2 / CO ratio is less than the target lower limit (YES), the hydrogen inventory amount is determined (step S21). If there is no hydrogen stock (NO) in step S21, the amount of steam supplied to the gasification apparatus 3 is increased (step S22). Thereafter, it is confirmed whether the H2 / CO ratio has become equal to or less than the target lower limit (step S23). If the H2 / CO ratio has become equal to or less than the target lower limit in step S23, the current amount of steam supplied to the gasification apparatus 3 is maintained. If the H2 / CO ratio has not become equal to or less than the target lower limit in step S23, the process returns to step S22, and the amount of steam supplied to the gasification apparatus 3 is increased. If there is hydrogen stock in step S21 (YES), the amount of steam supplied to the gasification apparatus 3 is increased (step S24). Thereafter, it is confirmed whether or not the amount of carbon monoxide produced has increased (step S25). If the amount of carbon monoxide produced has increased in step S25 (YES), the amount of steam supplied to the gasifier 3 is increased (step S26). Thereafter, it is confirmed whether or not the amount of carbon monoxide produced has increased (step S27). In step S27, if the amount of carbon monoxide produced has increased (YES), the process returns to step S26, and the amount of steam supplied to the gasification apparatus 3 is increased. In step S27, if the amount of carbon monoxide produced does not increase (in the case of NO), the water vapor supply amount is returned to the previous amount (step S28). Thereafter, hydrogen is supplied to the gasification apparatus 3 so that the H2 / CO ratio becomes equal to the target lower limit (step S29). Thereafter, the hydrogen inventory is determined (step S30). If there is hydrogen inventory (YES) in step S30, the current hydrogen supply amount to the gasification apparatus 3 is maintained. If there is no hydrogen inventory (NO) in step S30, the steam supply amount to the gasification apparatus 3 is adjusted to be midway between the initial steam supply amount and the current steam supply amount (step S31). Thereafter, hydrogen is supplied to the gasification apparatus 3 so that the H2 / CO ratio becomes equal to the target lower limit (step S32). Thereafter, it is determined whether or not there is hydrogen in stock (step S33). If there is hydrogen in stock (YES) in step S33, the current amount of hydrogen supplied to the gasification apparatus 3 is maintained. If there is no hydrogen in stock (NO) in step S33, the amount of steam supplied is repeatedly adjusted until there is hydrogen in stock. In step S25, if the amount of carbon monoxide produced does not increase (in the case of NO), the amount of steam supplied to the gasification apparatus 3 is reduced (step S34). Thereafter, it is confirmed whether or not the amount of carbon monoxide produced has increased (step S35). In step S35, if the amount of carbon monoxide produced does not increase (in the case of NO), the process proceeds to step S28. In step S35, if the amount of carbon monoxide produced has increased (YES), hydrogen is supplied to the gasifier 3 so that the H2 / CO ratio becomes equal to the target lower limit (step S36). Thereafter, the hydrogen inventory amount is determined (step S37). If there is hydrogen inventory amount (YES in step S37), the process returns to step S34 and the steam supply amount to the gasification apparatus 3 is reduced. If there is no hydrogen inventory amount (NO in step S37), the steam supply amount is returned to the previous amount (step S38). Thereafter, hydrogen is supplied to the gasification apparatus 3 so that the H2 / CO ratio becomes equal to the target lower limit (step S39).

[0040] According to the liquid fuel production method of this embodiment, it is possible to achieve the target range of the H / CO ratio and maximize the amount of carbon monoxide, regardless of the presence or absence of hydrogen, the operating conditions of the gasifier, or the type of biomass used. Therefore, it is possible to improve the efficiency of the entire liquid fuel production system.

[0041] Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments, and various modifications and variations are possible within the scope of the gist of the present invention as set forth in the claims. [Explanation of symbols]

[0042] 1. Fuel production system 2. Biomass raw material supply device 20 Raw material supply route 3 Gasifier 30 Gasifier 31 Gasifier sensors 32 Water supply equipment 33 Oxygen supply device 34 Heating device 35 CO sensor 36 Scrubba 37 Desulfurization equipment 4 Liquid fuel production equipment 5. Power generation facilities 6. Hydrogen generation and supply device 60 Electrolyzer 61 Hydrogen filling pump 62 Hydrogen Tank 63 Pressure Sensor 64 Hydrogen supply pump 65 Carbon dioxide capture equipment 66 Carbon Dioxide Tank 67 Carbon Dioxide Conversion Device 68 Fuel synthesis device 7 Control Device

Claims

1. A method for producing liquid fuel from a biomass feedstock, a hydrogen inventory confirmation step of confirming the hydrogen inventory; a gasification step for producing synthesis gas from biomass feedstock; an electrolysis process that produces hydrogen from water using electricity generated using renewable energy; a liquid fuel production process for producing liquid fuel using the synthesis gas produced in the gasification process and the hydrogen produced in the electrolysis process as raw materials, In the liquid fuel production process, H ２ When the / CO ratio is not less than the target lower limit, the amount of water vapor supplied is reduced, and then H ２ When the / CO ratio is equal to or less than the target lower limit, the hydrogen inventory is determined; If there is no hydrogen in stock, the steam supply will be returned to the previous level. If there is hydrogen in stock, the steam supply is reduced until the carbon monoxide production rate stops increasing, and when the carbon monoxide production rate stops increasing, the steam supply rate is returned to the previous level. ２ A method for producing a liquid fuel, comprising supplying hydrogen so that the / CO ratio is equal to a target lower limit, and checking the hydrogen inventory.

2. In the liquid fuel production process, when there is no hydrogen stock, the amount of steam supply is adjusted to be midway between the initial amount of steam supply and the current amount of steam supply, ２ 2. The method for producing liquid fuel according to claim 1, wherein hydrogen is supplied so that the / CO ratio becomes equal to the target lower limit, and the adjustment of the amount of steam supplied is repeated until hydrogen is in stock.

3. A method for producing liquid fuel from a biomass feedstock, a hydrogen inventory confirmation step of confirming the hydrogen inventory; a gasification step for producing synthesis gas from biomass feedstock; an electrolysis process that produces hydrogen from water using electricity generated using renewable energy; a liquid fuel production process for producing liquid fuel using the synthesis gas produced in the gasification process and the hydrogen produced in the electrolysis process as raw materials, In the liquid fuel production process, H ２ When the / CO ratio is less than the target lower limit, the steam supply amount is increased. When the amount of carbon monoxide generated increases, the increase in the steam supply amount is repeated until the amount of carbon monoxide generated stops increasing. When the amount of carbon monoxide generated does not increase, the steam supply amount is decreased. When the amount of carbon monoxide generated does not increase, the steam supply amount is returned to the previous amount. ２ A method for producing a liquid fuel, wherein hydrogen is supplied so that the / CO ratio is equal to a target lower limit, and the hydrogen inventory is confirmed.

4. In the liquid fuel production process, when there is no hydrogen stock, the amount of steam supply is adjusted to be midway between the initial amount of steam supply and the current amount of steam supply, ２ 4. The method for producing a liquid fuel according to claim 3, wherein hydrogen is supplied so that the / CO ratio becomes equal to the target lower limit, and the amount of steam supplied is repeatedly adjusted until the amount of hydrogen supplied becomes less than the amount of hydrogen produced.

5. In the liquid fuel production process, when the amount of carbon monoxide produced does not increase, the amount of steam supplied is reduced, and when the amount of carbon monoxide produced increases, H ２ Hydrogen is supplied so that the / CO ratio becomes equal to the target lower limit value, and if there is no hydrogen stock, the amount of water vapor supplied is returned to the previous level, and H ２ The method for producing a liquid fuel according to claim 3, wherein hydrogen is supplied so that the / CO ratio is equal to the target lower limit value.

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