WO2023017755A1 - Hydrocarbon-compound production device and production method - Google Patents

Abstract

[Problem] To provide a hydrocarbon-compound production device and production method with which it is possible to efficiently suppress an increase in temperature without employing a dedicated cooling device and to continue efficient hydrocarbon compound production when producing a hydrocarbon compound by utilizing electrolysis, such as methane generation by means of a PCEC co-electrolysis system. [Solution] The present invention provides a hydrocarbon-compound production device that synthesizes a hydrocarbon compound from H₂O and CO₂ by means of electrification, the hydrocarbon-compound production device including: an electrolyzer that has a fuel synthesis unit containing a cathode, a proton generation unit containing an anode, and an electrolyte membrane disposed between said electrodes; an H₂O supply unit that supplies H₂O to the proton generation unit; a cathode-gas supply unit that supplies a cathode gas containing CO₂ to the fuel synthesis unit; a fuel-synthesis-unit temperature measurement unit that measures the temperature of the fuel synthesis unit; and a control unit that controls the H₂O supply amount from the H₂O supply unit on the basis of the temperature of the fuel synthesis unit measured by the fuel-synthesis-unit temperature measurement unit.

Description

Hydrocarbon compound production apparatus and production method

TECHNICAL FIELD The present invention relates to an apparatus and method for producing a hydrocarbon-based compound that synthesizes a hydrocarbon-based compound from H ₂ O and CO ₂ by energization, and in particular, production in which the temperature is raised by the heat generated during the synthesis of the hydrocarbon-based compound. The present invention relates to an apparatus and method for producing a hydrocarbon compound capable of cooling the apparatus and suppressing a decrease in conversion efficiency due to electrolysis of H ₂ O and CO ₂ .

In recent years, due to growing awareness of environmental issues, systems have been proposed that utilize a methanation reaction using CO ₂ , which is a cause of global warming, as a raw material (for example, Patent Documents 1 and 2). Among such methanation systems, in a water electrolysis system (PCEC) using proton conductive ceramics (for example, Non-Patent Document 1), by electrolyzing H ₂ O on the anode side, protons (H ⁺ ) migrates in the electrolyte, generating H ₂ on the cathode side. At this time, methane can be produced by simultaneously electrolyzing CO ₂ on the cathode side.

JP 2010-62192 A Japanese Patent Application Laid-Open No. 2021-9820

In the production of methane from CO ₂ in such a PCEC co-electrolysis system, the temperature should be 700° C. or less at normal pressure from the equilibrium of the methanation reaction, and 550° C. or less from the viewpoint of CO ₂ conversion efficiency. Although it is preferable, there is a problem that the temperature rises as the reaction progresses due to the influence of overvoltage in the water electrolysis reaction at the anode and the reaction at the cathode is an exothermic reaction, and the methane production efficiency decreases. . On the other hand, if excessive cooling is performed to suppress heat generation, the electrolysis efficiency of the PCEC will decrease, and the methane production efficiency will also decrease.

In the present invention, in view of the current situation, when producing hydrocarbon compounds such as methane in a PCEC co-electrolysis system, it is possible to efficiently suppress the temperature rise and efficiently carbonize without using a dedicated cooling device. It is an object of the present invention to provide a production apparatus and a production method for a hydrocarbon-based compound that can continue production of the hydrogen-based compound.

The present invention was invented to solve the problems in the prior art as described above, and the apparatus and method for producing a hydrocarbon compound of the present invention are configured at least as follows. include.

[1] A hydrocarbon-based compound manufacturing apparatus for synthesizing a hydrocarbon-based compound from H ₂ O and CO ₂ by energization,
an electrolytic cell having a fuel synthesis section including a cathode, a proton generation section including an anode, and an electrolyte membrane disposed between the cathode and the anode;
an H ₂ O supply unit that supplies H ₂ O to the proton generation unit;
a cathode gas supply unit that supplies a cathode gas containing CO ₂ to the fuel synthesizing unit;
a fuel synthesizing unit temperature measuring unit for measuring the temperature of the fuel synthesizing unit;
a controller for controlling the amount of H ₂ O supplied from the H ₂ O supply unit based on the temperature of the fuel synthesizing unit measured by the temperature measuring unit of the fuel synthesizing unit. Device.

[2] The apparatus for producing a hydrocarbon-based compound according to [1], wherein the electrolyte membrane contains a proton-conducting material.

[3] The apparatus for producing a hydrocarbon-based compound according to [2], wherein the proton-conducting material is proton-conducting ceramics.

[4] The fuel synthesizing unit temperature measuring unit measures the temperature difference between the inlet side temperature and the outlet side temperature of the fuel synthesizing unit, the temperature difference between the inlet side temperature of the fuel synthesizing unit and the temperature of the cathode, and the fuel synthesizing unit temperature. The apparatus for producing a hydrocarbon-based compound according to any one of [1] to [3], wherein at least one of the outlet side temperatures of the part is measured.

[5] further comprising a generated gas measuring unit for measuring the amount of generated gas generated in the fuel synthesizing unit;
The control unit
The hydrocarbon-based compound manufacturing apparatus according to any one of [1] to [4], wherein the H ₂ O supply amount is controlled based on the generated amount of the generated gas measured by the generated gas measuring unit.

[6] further comprising a hydrocarbon-based compound production rate measuring unit that measures the production rate R of the hydrocarbon-based compound produced in the fuel synthesizing unit with respect to the amount of CO ₂ supplied from the cathode gas supply unit;
The control unit
Production of a hydrocarbon-based compound according to any one of [1] to [5], wherein the H ₂ O supply amount is controlled based on the production rate R measured in the hydrocarbon-based compound production rate measuring unit. Device.

[7] A current-voltage measuring unit that measures at least one of a voltage value to the anode with respect to the cathode, a current value flowing between the cathode and the anode, and an electrical resistance value between the cathode and the anode; further prepared,
The control unit
any one of [1] to [6], wherein the H ₂ O supply amount is controlled based on at least one of the voltage value, the current value, and the electrical resistance value measured by the current-voltage measuring unit; An apparatus for producing the hydrocarbon-based compound described.

[8] Production of the hydrocarbon-based compound according to any one of [1] to [7], further comprising a cathode gas preheating unit for heating the cathode gas supplied from the cathode gas supply unit to the fuel synthesis unit Device.

[9] The hydrocarbon system according to any one of [1] to [8], further comprising an H ₂ O preheating section for heating H ₂ O supplied from the H ₂ O supply section to the proton generation section. Compound manufacturing equipment.

[10] further comprising a proton generation unit temperature measurement unit that measures the temperature of the proton generation unit;
The carbonization according to any one of [1] to [9], wherein the control unit controls the H ₂ O supply amount based on the temperature of the proton generation unit measured by the proton generation unit temperature measurement unit. Manufacturing equipment for hydrogen-based compounds.

[11] further comprising a carrier gas supply unit for supplying a carrier gas for transporting the H ₂ O,
Based on at least one of the temperature of the fuel synthesizing section measured by the temperature measuring section of the fuel synthesizing section and the temperature of the proton generating section measured by the proton generating section temperature measuring section, the control section determines the The apparatus for producing a hydrocarbon-based compound according to [10], wherein the amount of carrier gas supplied from the carrier gas supply unit is controlled.

[12] further comprising a carrier gas supply unit for supplying a carrier gas for transporting the H ₂ O,
Any one of [1] to [11], wherein the control unit controls the amount of carrier gas supplied from the carrier gas supply unit based on the temperature of the fuel synthesizing unit measured by the fuel synthesizing unit temperature measuring unit. 1. The apparatus for producing a hydrocarbon-based compound according to 1.

[13] an electrolytic cell having a fuel synthesizing section including a cathode, a proton generating section including an anode, and an electrolyte membrane disposed between the cathode and the anode;
an H ₂ O supply unit that supplies H ₂ O to the proton generation unit;
_a cathode gas supply unit for supplying a cathode gas _{containing CO2} to the fuel synthesis unit; A method for producing a hydrogen-based compound,
A method for producing a hydrocarbon-based compound, wherein the amount of H ₂ O supplied from the H ₂ O supply unit is controlled based on the temperature of the fuel synthesizing unit.

[14] The temperature of the fuel synthesizing section is the temperature difference between the inlet side temperature and the outlet side temperature of the fuel synthesizing section, the temperature difference between the inlet side temperature of the fuel synthesizing section and the temperature of the cathode, and the fuel synthesizing section. The method for producing a hydrocarbon-based compound according to [13], wherein at least one of the outlet-side temperatures of

[15] The method for producing a hydrocarbon compound according to [13] or [14], wherein the H ₂ O supply amount is controlled based on the production amount of the product gas produced in the fuel synthesizing section.

[16] Controlling the H _{2 O supply amount based on the production rate R of the hydrocarbon-based compound produced in the fuel synthesis unit with respect to the CO 2 supply} amount from the cathode gas supply unit, from [13] [15] The method for producing a hydrocarbon-based compound according to any one of [15].

[17] The H ₂ O The method for producing a hydrocarbon-based compound according to any one of [13] to [16], wherein the supply amount is controlled.

[18] The method for producing a hydrocarbon-based compound according to any one of [13] to [17], wherein the cathode gas supplied from the cathode gas supply unit to the fuel synthesis unit is heated.

[19] The method for producing a hydrocarbon-based compound according to any one of [13] to [18], wherein H ₂ O supplied from the H ₂ O supply unit to the proton generation unit is heated.

[20] The method for producing a hydrocarbon-based compound according to any one of [13] to [19], wherein the H ₂ O supply amount is controlled based on the temperature of the proton generating section.
[21] The apparatus for producing a hydrocarbon-based compound further includes a carrier gas supply unit for supplying a carrier gas for carrying the H ₂ O,
The method for producing a hydrocarbon-based compound according to [20], wherein the amount of carrier gas supplied from the carrier gas supply unit is controlled based on at least one of the temperature of the fuel synthesis unit and the temperature of the proton generation unit. .

[22] The apparatus for producing a hydrocarbon-based compound further includes a carrier gas supply unit for supplying a carrier gas for transporting the H ₂ O,
The method for producing a hydrocarbon-based compound according to any one of [13] to [20], wherein the amount of carrier gas supplied from the carrier gas supply unit is controlled based on the temperature of the fuel synthesizing unit.

According to the present invention, the amount of H ₂ O supplied to the proton generating section including the anode is controlled based on the temperature of the fuel synthesizing section including the cathode, thereby cooling the manufacturing apparatus and reducing the electrolysis efficiency. , it is possible to suppress the decrease in the production efficiency of the hydrocarbon-based compound, and to continue the efficient production of the hydrocarbon-based compound.

FIG. 1 is a schematic diagram for explaining the configuration of a hydrocarbon-based compound production apparatus according to the present embodiment. FIG. 2 is a schematic diagram for explaining the configuration of a hydrocarbon-based compound production apparatus according to another embodiment.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments (examples) of the present invention will be described in more detail with reference to the drawings.
FIG. 1 is a schematic diagram for explaining the configuration of a hydrocarbon-based compound production apparatus according to the present embodiment.

In this embodiment, an example of producing methane (CH ₄ ) as a hydrocarbon compound is described, but the present invention is not limited to hydrocarbons such as methane and ethane. For example, the manufacturing apparatus and manufacturing method for manufacturing hydrocarbon compounds including alcohols such as methanol and ethanol, aldehydes such as formaldehyde and acetaldehyde, carboxylic acids such as formic acid and acetic acid, and ethers such as dimethyl ether. It is possible to apply

As shown in FIG. 1, the hydrocarbon-based compound manufacturing apparatus 10 of the present embodiment includes a fuel synthesizing section 20 including a cathode 22, a proton generating section 30 including an anode 32, and between the cathode 22 and the anode 32 an electrolytic cell 40 having an electrolyte membrane 42 disposed thereon.

The anode 32 and the cathode 22 are connected to a power source 50 and are configured such that current flows from the cathode 22 to the power source 50 and current flows from the power source 50 to the anode 32 .

The electrolyte membrane 42 is not particularly limited as long as it is a membrane that has the property of allowing ions to pass through mainly as charge carriers, and has the property of preventing an electrical short circuit between the anode 32 and the cathode 22. can be, for example, an electrolyte membrane 42 comprising a proton-conducting material. Since the electrolyte membrane 42 contains the proton conductive material, the protons generated by the electrolysis of H ₂ O in the proton generating section 30 including the anode 32 pass through the electrolyte membrane 42 to Move to cathode 22 . Proton-conducting ceramics are preferably used as such a proton-conducting material.

An H ₂ O supply unit 34 for supplying H ₂ O to the proton generation unit 30 is connected to the proton generation unit 30, while a cathode containing CO ₂ in the fuel synthesis unit 20 is connected to the fuel synthesis unit 20. A cathode gas supply unit 24 for supplying gas is connected. The cathode gas supplied _from the cathode gas supply unit 24 is not particularly limited as long as _it contains at least _CO2 . It may be a mixed gas with active gas, a mixed gas with NOx or CO, or air.

Pressure regulating valves 35 and 25 are provided on the H ₂ O supply path 33 from the H ₂ O supply section 34 to the proton generation section 30 and on the cathode gas supply path 23 from the cathode gas supply section 24 to the fuel synthesis section 20, respectively. is provided. In addition, a check valve 36 is provided on the H ₂ O supply path 33 from the H ₂ O supply unit 34 to the proton generation unit 30 , and the H 2 O This prevents H ₂ O from flowing back to the ₂ O supply section 34 .

The fuel synthesizing section 20 and the proton generating section 30 are provided with a cathode gas heating section 29 and an H ₂ O heating section 39, respectively. When CO 2 and H 2 O are electrolyzed in the fuel synthesizing section 20 and the proton generating section 30, respectively, CO _{2 and} H ₂ O are produced by heating with the cathode gas heating section 29 and the _{H 2} O heating section 39. electrolysis efficiency is improved.

The produced gas containing the hydrocarbon compound produced in the fuel synthesizing section 20 is discharged from the outlet 20b of the fuel synthesizing section 20 . The generated gas discharged from the outlet 20b of the fuel synthesizing unit 20 may contain, in addition to hydrocarbon compounds, CO ₂ , CO, H ₂ , H ₂ O, etc. that have not undergone a generation reaction. .

O ₂ produced by electrolyzing H ₂ O in the proton generating section 30 is discharged from the discharging section 30 b of the proton generating section 30 . The discharge part 30b may be provided at any position as long as the gas in the proton generation part 30 can be discharged. Note that H ₂ O that has not been electrolyzed is also discharged from the discharge part. Also, although not shown, for example, a path for the discharged H ₂ O to flow from the discharge portion 30b to the H ₂ O supply portion 34 may be provided and circulated, so that H ₂ O can be reused.

Further, the fuel synthesizing section 20 is provided with a fuel synthesizing section temperature measuring section 21 for measuring the temperature of the fuel synthesizing section 20 . The temperature of the fuel synthesizing section 20 measured by the fuel synthesizing section temperature measuring section 21 is output as an electric signal and transmitted to the control section 60 as will be described later.

In this embodiment, the fuel synthesizing unit temperature measuring unit 21 is provided on the outlet 20b side of the fuel synthesizing unit 20, and the temperature of the generated gas discharged from the fuel synthesizing unit 20 is measured as the temperature of the fuel synthesizing unit 20. However, not limited to this, for example, the fuel synthesizing unit temperature measuring unit 21 is provided on both the inlet 20a side and the outlet 20b side of the fuel synthesizing unit 20, and the inlet side temperature (supplied cathode gas temperature) and the outlet side temperature (the temperature of the produced gas discharged) may be measured. Further, the fuel synthesizing unit temperature measuring unit 21 is provided on the inlet 20a side of the fuel synthesizing unit and on the surface of the cathode 22 to measure the temperature difference between the inlet side temperature (the temperature of the supplied cathode gas) and the temperature of the cathode 22. You may make it

The H ₂ O supply unit 34 and the fuel synthesizing unit temperature measuring unit 21 are each provided with a control unit 60 electrically connected thereto. It is configured to control the amount of H ₂ O supplied from the H ₂ O supply section 34 . As the control unit 60, for example, a microcontroller having calculation means, storage means, input/output means, etc. can be used.

The controller 60 is configured to acquire the H ₂ O supply amount in real time from the electrically connected H ₂ O supply unit 34 . Also, the control unit 60 is electrically connected to the cathode gas supply unit 24 and configured to acquire the CO ₂ supply amount in real time. When the cathode gas containing a substance other than CO ₂ is supplied from the cathode gas supply unit 24, the amount of CO ₂ supplied is determined by measuring the amount of CO ₂ contained in the cathode gas using a known analyzer or measuring instrument. can be made to

In the hydrocarbon-based compound manufacturing apparatus 10 of the present embodiment configured as described above, the H ₂ O supply unit It controls the amount of H ₂ O supplied from 34 .

Specifically, when the temperature of the fuel synthesizing section 20 becomes higher than a predetermined temperature threshold, the supply amount of H _{2 O supplied from the H 2 O} supply section 34 is increased. On the other hand, when the temperature of the fuel synthesizing section 20 is equal to or lower than the predetermined temperature threshold, the supply amount of H ₂ O supplied from the H ₂ O supply section 34 is set as the standard amount. Here, the "standard amount" of the supply amount of H ₂ O means the supply amount that enables sufficient generation of protons necessary for the production of the hydrocarbon-based compound. The standard amount of H ₂ O supplied is not particularly limited, but from the viewpoint of CO ₂ conversion efficiency, it is preferably 0.5 times or more 5.0 times the amount of CO ₂ contained in the cathode gas. The amount of substance can be set to be 1.0 times or less, more preferably 1.0 times or more and 5.0 times or less, and still more preferably 1.0 times or more and 4.0 times or less.

Further, the predetermined temperature threshold can be appropriately set from the viewpoint of methanation reaction equilibrium, CO ₂ conversion efficiency, and the like. Specifically, for example, when measuring the temperature of the generated gas discharged from the fuel synthesizing unit 20 as the temperature of the fuel synthesizing unit 20, it is preferable to set the temperature threshold to 300° C. or higher and 700° C. or lower. It is more preferably 330°C or higher and 650°C or lower, and still more preferably 350°C or higher and 600°C or lower.

By controlling the supply amount of H ₂ O in this way, when the temperature of the manufacturing apparatus 10 rises, the amount of H ₂ O supplied from the H ₂ O supply unit 34 to the proton generation unit 30 can be increased. , the entire manufacturing apparatus 10 can be cooled, and a decrease in the electrolysis efficiency of CO ₂ at the cathode 22 and a decrease in the production efficiency of methane can be suppressed, and efficient methane production can be continued.

FIG. 2 is a schematic diagram for explaining the configuration of a hydrocarbon-based compound production apparatus according to another embodiment.
The hydrocarbon-based compound manufacturing apparatus 10 shown in FIG. 2 basically has the same configuration as the hydrocarbon-based compound manufacturing apparatus 10 shown in FIG. Therefore, a detailed description thereof will be omitted. Also, in FIG. 2, some lines indicating electrical connection with the control unit 60 are not shown because the drawing would be complicated.

The hydrocarbon-based compound manufacturing apparatus 10 of the present embodiment includes a carrier gas supply unit 38 that supplies a carrier gas that carries H ₂ O supplied from the H ₂ O supply unit 34 .
By configuring the carrier gas to transport H ₂ O in this way, the amount of H ₂ O supplied to the proton generating section 30 can be determined using an analytical instrument or measuring instrument such as a gas chromatograph or a mass flow meter. can be accurately grasped. That is, it is possible to more accurately control the amount of H ₂ O supplied from the H ₂ O supply section 34 to the proton generation section 30 based on the values obtained from the above-mentioned analysis equipment and measuring instruments.

In the present embodiment, the control unit 60 is electrically connected to the carrier gas supply unit 38, acquires the carrier gas supply amount in real time, and measures the temperature of the fuel synthesis unit 20 measured by the fuel synthesis unit temperature measurement unit 21. By controlling the amount of H ₂ O supplied from the H ₂ O supply unit 34 and the amount of carrier gas supplied from the carrier gas supply unit 38 based on the temperature, the amount of H ₂ O supplied to the proton generation unit 30 is reduced. It controls the amount of supply.

Further, the hydrocarbon-based compound production apparatus 10 of the present embodiment measures the production rate R of the hydrocarbon-based compound in the fuel synthesizing unit 20 with respect to the amount of CO ₂ supplied from the cathode gas supply unit 24. A rate measuring unit 62 is provided. In this embodiment, the hydrocarbon-based compound production rate measuring unit 62 is provided in the outlet side pipe 26 of the fuel synthesizing unit 20 . In addition, the hydrocarbon-based compound production rate measurement unit 62 is electrically connected to the control unit 60, and acquires the CO ₂ supply amount from the cathode gas supply unit 24 via the control unit 60, whereby the CO ₂ Calculates the production rate R of hydrocarbon-based compounds with respect to the supply amount. The calculated generation rate R is transmitted to the control unit as an electrical signal.

The hydrocarbon-based compound production rate measurement unit 62 calculates the production rate R from the ratio of the produced hydrocarbon-based compound production amount to the CO ₂ supply amount, and outputs the calculated production rate R to the control unit 60 . Here, it can be calculated by the production rate R=(hydrocarbon-based compound production amount (volume))/(CO ₂ supply amount (volume)). The amount (volume) of hydrocarbon-based compounds produced can be measured using a known measuring device such as a gas _{chromatograph} . It can also be calculated using a value.

The control unit 60 controls the H ₂ O supply amount and the carrier gas supply amount based on the production rate R obtained from the hydrocarbon-based compound production rate measurement unit 62 . That is, when the generation rate R is equal to or less than a predetermined generation rate threshold value, it is determined that the fuel synthesizing section 20 is overheated and the hydrocarbon-based compound generation efficiency is declining, and H ₂ O is supplied to the proton generating section 30. is increased, and the carrier gas supply is increased or decreased as necessary. On the other hand, if the generation rate R exceeds the predetermined generation rate threshold, control by the control unit 60 is not performed. Note that the production rate threshold value can be appropriately set, for example, based on the design of heat storage and heat release of the hydrocarbon-based compound manufacturing apparatus 10 .

Further, the hydrocarbon-based compound manufacturing apparatus 10 of the present embodiment includes a product gas separation unit 64 that separates only methane from the product gas in the fuel synthesis unit 20 . In this embodiment, the product gas separation unit 64 is provided downstream of the hydrocarbon-based compound production rate measurement unit 62 in the outlet pipe 26 of the fuel synthesis unit 20 .

The methane separated by the generated gas separation section 64 is recovered and stored in the CH ₄ recovery section 66 . In the present embodiment, the produced gas separation unit 64 is configured to separate only methane, but the produced gas is separated by component, for example, CO ₂ and H ₂ O contained in the produced gas. can be configured to be reused.

Further, the hydrocarbon-based compound manufacturing apparatus 10 of the present embodiment includes a generated gas measurement unit 68 that measures the amount of generated gas generated in the fuel synthesizing unit 20 . In the present embodiment, the generated gas measurement unit 68 is provided upstream of the generated gas separation unit 64 in the outlet pipe 26 of the fuel synthesizing unit 20 . The generated gas amount measured by the generated gas measuring unit 68 is transmitted as an electric signal to the control unit, and the control unit 60 determines the H ₂ O supply amount and the carrier gas supply amount based on the generated gas amount. is controlled to control the amount of H ₂ O supplied to the proton generating section 30 .

Specifically, when the amount of generated gas produced decreases, the control unit 60 determines that the CO ₂ electrolysis efficiency at the cathode 22 and the methane production efficiency have decreased, that is, fuel synthesis It is determined that the temperature of the portion 20 has risen, and the amount of H ₂ O supplied and the amount of carrier gas supplied are controlled so as to increase the amount of H ₂ O supplied to the proton generating portion 30 .

The hydrocarbon-based compound production apparatus 10 of the present embodiment also includes a CH ₄ measurement unit 65 that measures the amount of methane produced in the fuel synthesis unit 20 .

In this embodiment, the CH ₄ measurement unit 65 is provided downstream of the generated gas separation unit 64 and upstream of the CH ₄ recovery unit 66 in the outlet pipe 26 of the fuel synthesizing unit 20 .

In addition, the hydrocarbon-based compound manufacturing apparatus 10 of the present embodiment includes a voltage measuring section 52 (current-voltage measuring section) that measures the voltage value of the anode 32 with respect to the cathode 22 . The voltage measurement unit 52 is electrically connected to the control unit 60, and the voltage value of the anode 32 with respect to the cathode 22 measured by the voltage measurement unit 52 is transmitted to the control unit 60 as an electric signal.

The control unit 60 controls the H ₂ O supply amount and the carrier gas supply amount based on the voltage value obtained from the voltage measurement unit 52 . That is, when the voltage value is equal to or less than a predetermined voltage threshold, the supply amount of H ₂ O supplied to the proton generating section 30 is increased, and the carrier gas supply amount is increased or decreased as necessary. On the other hand, when the voltage value exceeds the voltage threshold, control by the control unit 60 is not performed.

In this embodiment, the current value flowing between the cathode 22 and the anode 32 is kept constant, and in order to measure the voltage value of the anode 32 with respect to the cathode 22, the voltage measurement unit 52 is used as a current/voltage measurement unit. However, not limited to this, for example, when operating with the voltage value to the anode 32 with respect to the cathode 22 constant, it can also be used as a current measurement unit for measuring the value of current flowing between the cathode 22 and the anode 32. Alternatively, it may be an electrical resistance measuring unit that measures the electrical resistance value between the cathode 22 and the anode 32 .

The value of the current flowing through the power supply 50 can also be used as the value of the current flowing between the cathode 22 and the anode 32 . As for the electrical resistance value between the cathode 22 and the anode 32, the electrical resistance value between the surface of the cathode 22 on the side of the fuel synthesizing section 20 and the surface of the anode 32 on the side of the proton generating section 30 is measured. preferably.

As in the case of the applied voltage value, the controller 60 controls the H ₂ O supply amount and the carrier gas supply amount based on the current value and the electrical resistance value.

The hydrocarbon-based compound manufacturing apparatus 10 of the present embodiment also includes a cathode gas preheating unit 27 that heats the cathode gas supplied from the cathode gas supply unit 24 to the fuel synthesizing unit 20 .
By heating the cathode gas supplied to the fuel synthesizing unit 20 in this way, for example, by setting the temperature of the cathode gas to 0° C. or higher and 400° C. or lower, the production rate R of the hydrocarbon-based compound in the fuel synthesizing unit 20 is improved. be able to. The temperature of the cathode gas is more preferably 100° C. or higher and 400° C. or lower, and still more preferably 300° C. or higher and 400° C. or lower.

Further, the hydrocarbon-based compound manufacturing apparatus 10 of the present embodiment includes an H ₂ O preheating section 37 that heats the H ₂ O supplied from the H ₂ O supply section 34 to the proton generation section 30 .
The temperature of the H ₂ O supplied to the proton generating section 30 is _not particularly limited as long as it exceeds 0° C. and is equal to or lower than the set temperature threshold. However, for example, by setting the temperature of H ₂ O to 200° C. or more and 300° C. or less, it can be supplied to the proton generation section 30 in the state of low-temperature steam, and the electrolysis efficiency of H ₂ O in the proton generation section 30 is improved. can be made

In addition, the hydrocarbon-based compound manufacturing apparatus 10 of the present embodiment includes a proton generation unit temperature measurement unit 31 that measures the temperature of the proton generation unit 30 . The temperature of the proton generating section 30 measured by the proton generating section temperature measuring section 31 is output as an electrical signal and sent to the control section 60 .

In the present embodiment, the proton generation part temperature measurement part 31 is provided in the discharge part 30b of the proton generation part 30, but it is not limited to this and can be attached to any position of the proton generation part 30. That is, it can be provided on the inlet side (introduction part 30a) of the proton generating part 30, the surface of the anode 32, or the like.

The control unit 60 controls the H ₂ O supply amount and carrier gas supply amount based on the proton generation unit temperature obtained from the proton generation unit temperature measurement unit 31 . That is, when the proton generation unit temperature exceeds a predetermined proton generation unit temperature threshold value, it is determined that the fuel synthesizing unit 20 is overheated and the hydrocarbon-based compound generation efficiency is reduced, and the proton generation unit 30 The supply amount of H ₂ O to be supplied is increased, and the carrier gas supply amount is increased or decreased as necessary. On the other hand, when the proton generating part temperature is equal to or lower than the predetermined proton generating part temperature threshold, control by the control part 60 is not performed. The proton generating part temperature threshold value can be appropriately set, for example, based on the design of heat storage and heat dissipation of the hydrocarbon-based compound manufacturing apparatus 10 .

Although the preferred embodiment of the present invention has been described above, the present invention is not limited to this, and various modifications are possible without departing from the scope of the present invention. For example, some of the functions arranged only in FIG. 2 can be selected and incorporated into the apparatus of FIG.

10 manufacturing device 20 fuel synthesizing unit 20a fuel synthesizing unit inlet 20b fuel synthesizing unit outlet 21 fuel synthesizing unit temperature measuring unit 22 cathode 23 cathode gas supply path 24 cathode gas supply unit 25 pressure control valve 26 outlet pipe 27 cathode gas preheating unit 29 cathode gas heating unit 30 proton generation unit 30a introduction unit (proton generation unit inlet)
30b discharge section (proton generation section exit)
31 Proton generation unit temperature measurement unit 32 Anode 33 H ₂ O supply path 34 H ₂ O supply unit 35 Pressure control valve 36 Check valve 37 H ₂ O preheating unit 38 Carrier gas supply unit 39 H ₂ O heating unit 40 Electrolytic bath 42 Electrolyte membrane 50 Power supply 52 Voltage measurement unit 60 Control unit 62 Hydrocarbon compound production rate measurement unit 64 Generated gas separation unit 65 CH ₄ measurement unit 66 CH ₄ recovery unit 68 Generated gas measurement unit

Claims (22)

1. A hydrocarbon-based compound manufacturing apparatus for synthesizing a hydrocarbon-based compound from H ₂ O and CO ₂ by energization,
   an electrolytic cell having a fuel synthesis section including a cathode, a proton generation section including an anode, and an electrolyte membrane disposed between the cathode and the anode;
   an H ₂ O supply unit that supplies H ₂ O to the proton generation unit;
   a cathode gas supply unit that supplies a cathode gas containing CO ₂ to the fuel synthesizing unit;
   a fuel synthesizing unit temperature measuring unit for measuring the temperature of the fuel synthesizing unit;
   a controller for controlling the amount of H ₂ O supplied from the H ₂ O supply unit based on the temperature of the fuel synthesizing unit measured by the temperature measuring unit of the fuel synthesizing unit. Device.
2. The apparatus for producing a hydrocarbon-based compound according to claim 1, wherein the electrolyte membrane contains a proton-conducting material.
3. The apparatus for producing a hydrocarbon-based compound according to claim 2, wherein the proton-conducting material is proton-conducting ceramics.
4. The fuel synthesizing unit temperature measuring unit measures the temperature difference between the inlet side temperature and the outlet side temperature of the fuel synthesizing unit, the temperature difference between the inlet side temperature of the fuel synthesizing unit and the temperature of the cathode, and the temperature difference between the inlet side temperature of the fuel synthesizing unit and the temperature of the cathode. 4. The apparatus for producing a hydrocarbon-based compound according to any one of claims 1 to 3, wherein at least one of side temperatures is measured.
5. further comprising a generated gas measurement unit that measures the amount of generated gas generated in the fuel synthesizing unit;
   The control unit
   The apparatus for producing a hydrocarbon compound according to any one of claims 1 to 3, wherein the _H2O supply amount is controlled based on the production amount of the produced gas measured by the produced gas measurement unit.
6. further comprising a hydrocarbon-based compound production rate measuring unit that measures the production rate R of the hydrocarbon-based compound produced in the fuel synthesis unit with respect to the amount of CO ₂ supplied from the cathode gas supply unit;
   The control unit
   4. Production of the hydrocarbon compound according to any one of claims 1 to 3, wherein the H ₂ O supply amount is controlled based on the production rate R measured in the hydrocarbon compound production rate measurement unit. Device.
7. a current-voltage measuring unit that measures at least one of a voltage value to the anode with respect to the cathode, a current value flowing between the cathode and the anode, and an electrical resistance value between the cathode and the anode;
   The control unit
   4. The H 2 O supply amount according to any one of claims 1 to 3, wherein the H ₂ O supply amount is controlled based on at least one of the voltage value, the current value, and the electrical resistance value measured by the current-voltage measuring unit. An apparatus for producing the hydrocarbon-based compound described.
8. The apparatus for producing a hydrocarbon-based compound according to any one of claims 1 to 3, further comprising a cathode gas preheating section for heating the cathode gas supplied from the cathode gas supply section to the fuel synthesizing section.
9. 4. Production of the hydrocarbon-based compound according to any one of claims 1 to 3, further comprising an _H2O preheating section for heating _H2O supplied from the _H2O supply section to the proton generation section. Device.
10. further comprising a proton generation unit temperature measurement unit that measures the temperature of the proton generation unit;
    The carbonization according to any one of claims 1 to 3, wherein the control unit controls the H ₂ O supply amount based on the temperature of the proton generation unit measured by the proton generation unit temperature measurement unit. Manufacturing equipment for hydrogen-based compounds.
11. further comprising a carrier gas supply unit for supplying a carrier gas for transporting the H ₂ O,
    Based on at least one of the temperature of the fuel synthesizing section measured by the temperature measuring section of the fuel synthesizing section and the temperature of the proton generating section measured by the proton generating section temperature measuring section, the control section determines the 11. The apparatus for producing a hydrocarbon-based compound according to claim 10, wherein the amount of carrier gas supplied from the carrier gas supply unit is controlled.
12. further comprising a carrier gas supply unit for supplying a carrier gas for transporting the H ₂ O,
    4. The controller according to any one of claims 1 to 3, wherein the control unit controls the amount of carrier gas supplied from the carrier gas supply unit based on the temperature of the fuel synthesizing unit measured by the fuel synthesizing unit temperature measuring unit. 10. An apparatus for producing the hydrocarbon-based compound according to claim 1.
13. an electrolytic cell having a fuel synthesis section including a cathode, a proton generation section including an anode, and an electrolyte membrane disposed between the cathode and the anode;
    an H ₂ O supply unit that supplies H ₂ O to the proton generation unit;
    _a cathode gas supply unit _for supplying a cathode gas containing _CO2 to the fuel synthesis unit; A method for producing a hydrogen-based compound,
    A method for producing a hydrocarbon-based compound, wherein the amount of H ₂ O supplied from the H ₂ O supply unit is controlled based on the temperature of the fuel synthesizing unit.
14. The temperature of the fuel synthesizing section includes a temperature difference between an inlet side temperature and an outlet side temperature of the fuel synthesizing section, a temperature difference between the inlet side temperature of the fuel synthesizing section and the temperature of the cathode, and an outlet side of the fuel synthesizing section. 14. The method for producing a hydrocarbon-based compound according to claim 13, wherein the temperature is at least one of:
15. 15. The method for producing a hydrocarbon compound according to claim 13, wherein the _H2O supply amount is controlled based on the production amount of the product gas produced in the fuel synthesizing section.
16. 15. The H 2 O supply amount according to claim 13 or 14, wherein the H ₂ O supply amount is controlled based on a production rate R of the hydrocarbon compound produced in the fuel synthesizing unit with respect to the CO ₂ supply amount from the cathode gas supply unit. A method for producing a hydrocarbon-based compound of
17. The H ₂ O supply amount is adjusted based on at least one of a voltage value to the anode with respect to the cathode, a current value flowing between the cathode and the anode, and an electrical resistance value between the cathode and the anode. 15. The method for producing a hydrocarbon-based compound according to claim 13 or 14, wherein the hydrocarbon-based compound is controlled.
18. The method for producing a hydrocarbon-based compound according to claim 13 or 14, wherein the cathode gas supplied from the cathode gas supply unit to the fuel synthesis unit is heated.
19. 15. The method for producing a hydrocarbon-based compound according to claim 13, wherein the _H2O supplied from the _H2O supply unit to the proton generation unit is heated.
20. 15. The method for producing a hydrocarbon-based compound according to claim 13, wherein the _H2O supply amount is controlled based on the temperature of the proton generating section.
21. The apparatus for producing a hydrocarbon-based compound further comprises a carrier gas supply unit for supplying a carrier gas for transporting the H ₂ O,
    21. The method for producing a hydrocarbon compound according to claim 20, wherein the amount of carrier gas supplied from the carrier gas supply unit is controlled based on at least one of the temperature of the fuel synthesis unit and the temperature of the proton generation unit. .
22. The apparatus for producing a hydrocarbon-based compound further comprises a carrier gas supply unit for supplying a carrier gas for transporting the H ₂ O,
    15. The method for producing a hydrocarbon compound according to claim 13, wherein the amount of carrier gas supplied from said carrier gas supply unit is controlled based on the temperature of said fuel synthesizing unit.

Images