Carbon dioxide consumption amount calculation system, carbon dioxide consumption amount calculation method, and carbon dioxide emission right transaction assistance system

Abstract

A carbon dioxide consumption calculation system (70) is provided with a first detection unit (71), a second detection unit (72), and a data processing device (75) (calculation unit). The first detection unit (71) is disposed in a first supply path (91) between a supply unit (90), which is a supply source for carbon dioxide, and a carbon dioxide utilization device (80) for producing a carbon dioxide-derived product using carbon dioxide supplied from the supply unit (90) as a raw material. The first detection unit (71) detects a first parameter relating to carbon dioxide supplied via the first supply path (91). A second detection unit (72) detects a second parameter relating to carbon dioxide contained in the product generated by the carbon dioxide utilization device (80). A data processing device (75) (calculation unit) calculates the amount of carbon dioxide consumed by the carbon dioxide utilization device (80) on the basis of the first parameter and the second parameter.

Description

Technical Field

[0001] The present disclosure relates to a carbon dioxide consumption calculation system, a carbon dioxide consumption calculation method, and a carbon dioxide emission rights trading auxiliary system. Background Art

[0002] In the carbon dioxide emission rights trading method disclosed in Patent Document 1, the emission rights transferee calculates the carbon dioxide emission rights that may be generated by the use of energy-consuming equipment and returns a reward equivalent to the calculated carbon dioxide emission rights to the user of the energy-consuming equipment. The trading method includes: a device ID recording process, in which the device ID of each energy-consuming equipment provided by the equipment provider is recorded in a management database set up on the emission rights transferee's side; and an emission rights calculation process, in which the amount of carbon dioxide reduction is calculated based on the energy consumption of the energy-consuming equipment with each device ID, and the carbon dioxide emission rights obtained by the user are calculated based on the reduction. In the trading method disclosed in Patent Document 1, the CO2 emission credits (credits) previously secured by the emission rights transferee are predicted and calculated based on the amount of CO2 emissions that can be reduced during the normal endurance driving distance of the electric vehicle sold.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Laid-Open No. 2011-134179 Summary of the Invention

[0006] Problems to be solved by the invention

[0007] The technology of Patent Document 1 calculates the amount of CO 2 emissions that can be reduced during the travel of an electric vehicle, and does not include the idea of ​​calculating the amount consumed in a "carbon dioxide utilization device that produces a product derived from carbon dioxide."

[0008] One object of the present invention is to provide a technique for more accurately calculating the amount of carbon dioxide consumed in a carbon dioxide utilization apparatus that uses carbon dioxide as a raw material to produce a product derived from carbon dioxide.

[0009] Solutions for solving problems

[0010] A carbon dioxide consumption calculation system according to one embodiment of the present invention includes:

[0011] a first detection unit disposed in a raw material supply path between a supply unit serving as a supply source of carbon dioxide and a carbon dioxide utilization device for detecting a first parameter related to carbon dioxide supplied via the raw material supply path, the carbon dioxide utilization device producing a product derived from carbon dioxide using the carbon dioxide supplied from the supply unit as a raw material;

[0012] a second detection unit that detects a second parameter related to carbon dioxide contained in the product generated by the carbon dioxide utilization device; and

[0013] A calculation unit calculates a consumption amount of carbon dioxide consumed in the carbon dioxide utilization device based on the first parameter and the second parameter.

[0014] In one embodiment of the present invention, a method for calculating carbon dioxide consumption is provided, wherein:

[0015] The amount of carbon dioxide consumed in a carbon dioxide utilization device is calculated based on a first parameter and a second parameter, wherein the first parameter is a parameter related to the carbon dioxide supplied via a raw material supply path between a supply unit serving as a supply source of carbon dioxide and the carbon dioxide utilization device, the carbon dioxide utilization device using the carbon dioxide supplied from the supply unit as a raw material to produce a product derived from carbon dioxide, and the second parameter is a parameter related to the carbon dioxide contained in the product generated by the carbon dioxide utilization device.

[0016] A carbon dioxide emission rights trading support system according to one embodiment of the present invention includes:

[0017] a management system having a token issuing unit for issuing tokens; and

[0018] The administrator wallet corresponds to the management system.

[0019] In the case where a user account corresponds to a user wallet and a consumption signal for notifying the management system of the amount of carbon dioxide consumption is sent from a user terminal corresponding to the user account, the token issuing unit issues the token based on the consumption signal, and the management system instructs the management system to store the issued token in the user wallet.

[0020] The emission rights trading support system generates the consumption signal based on the carbon dioxide consumption calculated by the above-mentioned carbon dioxide consumption calculation method and transmits the consumption signal.

[0021] Effects of the Invention

[0022] The present invention can more accurately calculate the amount of carbon dioxide consumed in a carbon dioxide utilization device that uses carbon dioxide as a raw material to produce a product derived from carbon dioxide. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is an explanatory diagram for explaining a carbon dioxide utilization system and the like to which the carbon dioxide consumption calculation system according to the first embodiment is applied.

[0024] Figure 2 This is an example configuration Figure 1 A schematic cross-sectional view of a reaction device that is part of a carbon dioxide utilization system is shown.

[0025] Figure 3 This is an explanatory diagram schematically showing a carbon dioxide emission rights trading support system and a trading system to which the carbon dioxide consumption calculation system according to the first embodiment is applied.

[0026] Figure 4 So with Figure 3 Different viewpoints Figure 3 An illustration of the trading system.

[0027] Figure 5 (A) is an explanatory diagram briefly showing the correspondence between the administrator account and the administrator wallet stored in the blockchain. Figure 5 (B) is an explanatory diagram briefly showing the correspondence between each user account and each user wallet stored in the blockchain. Figure 5 (C) is an explanatory diagram briefly showing the correspondence between each emitter account and each emitter wallet stored in the blockchain.

[0028] Figure 6 Is used to illustrate Figure 3 An explanatory diagram of the exchange of data among the management system, user terminal, emitter terminal, and each wallet in the transaction system.

[0029] Figure 7 Is used to illustrate and Figure 6 A diagram illustrating data exchange in different methods.

[0030] Figure 8 It is an explanatory diagram for explaining a carbon dioxide utilization system and the like to which the carbon dioxide consumption calculation system according to the second embodiment is applied.

[0031] Figure 9 Is used to illustrate the application Figure 8 This is an explanatory diagram of the transaction system and auxiliary systems of the carbon dioxide consumption calculation system shown. DETAILED DESCRIPTION

[0032] An example of implementation is listed in the following [1] to

[14] .

[0033] [1] A carbon dioxide consumption calculation system comprising:

[0034] a first detection unit disposed in a raw material supply path between a supply unit serving as a supply source of carbon dioxide and a carbon dioxide utilization device for detecting a first parameter related to carbon dioxide supplied via the raw material supply path, the carbon dioxide utilization device producing a product derived from carbon dioxide using the carbon dioxide supplied from the supply unit as a raw material;

[0035] a second detection unit that detects a second parameter related to carbon dioxide contained in the product generated by the carbon dioxide utilization device; and

[0036] A calculation unit calculates a consumption amount of carbon dioxide consumed in the carbon dioxide utilization device based on the first parameter and the second parameter.

[0037] The carbon dioxide consumption calculation system of [1] can detect a first parameter related to the carbon dioxide supplied via the raw material supply path by a first detection unit. Furthermore, it can detect a second parameter related to the carbon dioxide contained in the product generated by the carbon dioxide utilization device by a second detection unit. Furthermore, the consumption calculation system can more accurately calculate the "amount of carbon dioxide consumed in the carbon dioxide utilization device" by reflecting the first parameter obtained in the path before the carbon dioxide is added and the second parameter based on the product obtained after the carbon dioxide is added.

[0038] [2] The carbon dioxide consumption calculation system according to [1], wherein:

[0039] The calculation unit calculates the consumption amount based on a difference between a supply amount of carbon dioxide determined based on the first parameter and a residual amount of carbon dioxide in the product determined based on the second parameter.

[0040] The difference between the "supply amount of carbon dioxide determined based on the first parameter" and the "residual amount of carbon dioxide in the product determined based on the second parameter" is likely to be consistent with or similar to the amount of carbon dioxide consumed in the carbon dioxide utilization device. Therefore, if the carbon dioxide consumption calculation system of [2] calculates the consumption based on the difference, it is possible to more accurately calculate the "amount of carbon dioxide consumed in the carbon dioxide utilization device."

[0041] [3] The carbon dioxide consumption calculation system according to [1], wherein:

[0042] The second detection unit detects the second parameter related to carbon dioxide contained in the product in the product path provided downstream of the carbon dioxide utilization device.

[0043] The carbon dioxide consumption calculation system further includes a third detection unit that detects a third parameter related to carbon dioxide contained in the exhaust gas in an exhaust path provided on the downstream side of the carbon dioxide utilization device so that the exhaust gas other than the product passes therethrough.

[0044] The calculation unit calculates the consumption amount based on the first parameter, the second parameter, and the third parameter.

[0045] When the above-mentioned product and the above-mentioned exhaust gas are generated in the carbon dioxide utilization device, the carbon dioxide consumption calculation system [3] can detect a third parameter related to the carbon dioxide contained in the exhaust gas by the third detection unit. Moreover, the above-mentioned consumption calculation system can more accurately calculate the "amount of carbon dioxide consumed in the carbon dioxide utilization device" by reflecting the first parameter obtained in the path before the carbon dioxide is injected, the second parameter based on the product obtained after the carbon dioxide is injected, and the third parameter based on the carbon dioxide contained in the residual exhaust gas.

[0046] [4] The carbon dioxide consumption calculation system according to any one of [1] to [3], wherein:

[0047] The system further includes a recording unit that hashes at least one of the first parameter and the second parameter and records the hashed value in a blockchain.

[0048] The carbon dioxide consumption calculation system of [4] can use blockchain to manage at least one of the first parameter and the second parameter, thereby improving the function of preventing illegal tampering of the parameter. Therefore, the consumption calculation system can operate the system while ensuring the reliability of the parameter.

[0049] [5] The carbon dioxide consumption calculation system according to any one of [1] to [4], wherein:

[0050] The calculation unit includes a program for calculating the consumption amount based on the first parameter and the second parameter.

[0051] The carbon dioxide consumption calculation system further includes a change history recording unit that hashes the change history of the program and records it in a blockchain.

[0052] The carbon dioxide consumption calculation system of [5] can use blockchain to manage the program change history, which can improve the function of preventing illegal tampering of the program. Therefore, the consumption calculation system can operate the system while ensuring the reliability of the program.

[0053] [6] The carbon dioxide consumption calculation system according to any one of [1] to [5], further comprising:

[0054] a data recording unit configured to record data including at least one of the first parameter and the second parameter in a cloud; and

[0055] A comparison unit, which compares data recorded in the cloud before generating the current data with the current data when at least either one of the first detection unit and the second detection unit generates current data including at least either one of the first parameter and the second parameter.

[0056] The carbon dioxide consumption calculation system of [6] described above can verify the current data by comparing it with the data recorded in the cloud before the current data is generated, when current data including at least one of the first parameter and the second parameter is generated.

[0057] [7] A method for calculating carbon dioxide consumption, wherein:

[0058] The amount of carbon dioxide consumed in a carbon dioxide utilization device is calculated based on a first parameter and a second parameter, wherein the first parameter is a parameter related to the carbon dioxide supplied via a raw material supply path between a supply unit serving as a supply source of carbon dioxide and the carbon dioxide utilization device, the carbon dioxide utilization device using the carbon dioxide supplied from the supply unit as a raw material to produce a product derived from carbon dioxide, and the second parameter is a parameter related to the carbon dioxide contained in the product generated by the carbon dioxide utilization device.

[0059] The above-mentioned method for calculating the carbon dioxide consumption of [7] can more accurately calculate the "amount of carbon dioxide consumed in the carbon dioxide utilization device" by reflecting a first parameter related to the carbon dioxide supplied via the raw material supply path and a second parameter related to the carbon dioxide contained in the product generated by the carbon dioxide utilization device.

[0060] [8] The method for calculating carbon dioxide consumption according to [7], wherein:

[0061] The consumption amount is calculated based on a difference between a supply amount of carbon dioxide determined based on the first parameter and a residual amount of carbon dioxide in the product determined based on the second parameter.

[0062] The difference between the "supply amount of carbon dioxide determined based on the first parameter" and the "residual amount of carbon dioxide in the product determined based on the second parameter" is likely to be consistent with or similar to the amount of carbon dioxide consumed in the carbon dioxide utilization device. Therefore, if the consumption is calculated based on the difference using the carbon dioxide consumption calculation method [8], the "amount of carbon dioxide consumed in the carbon dioxide utilization device" can be calculated more accurately.

[0063] [9] The method for calculating carbon dioxide consumption according to [7], wherein:

[0064] a third parameter related to carbon dioxide contained in the exhaust gas in an exhaust gas path provided on the downstream side of the carbon dioxide utilization device so as to allow the exhaust gas other than the product to pass therethrough,

[0065] In the carbon dioxide consumption calculation method, the consumption is calculated based on the first parameter, the second parameter, and the third parameter.

[0066] The above-mentioned method for calculating the carbon dioxide consumption of [9] can more accurately calculate the "amount of carbon dioxide consumed in the carbon dioxide utilization device" by reflecting a first parameter obtained in the path before the introduction of carbon dioxide, a second parameter based on the product obtained after the introduction of carbon dioxide, and a third parameter based on the carbon dioxide contained in the residual exhaust gas.

[0067]

[10] A carbon dioxide emission rights trading auxiliary system comprising:

[0068] a management system having a token issuing unit for issuing tokens; and

[0069] The administrator wallet corresponds to the management system.

[0070] In the case where a user account corresponds to a user wallet and a consumption signal for notifying the management system of the amount of carbon dioxide consumption is sent from a user terminal corresponding to the user account, the token issuing unit issues the token based on the consumption signal, and the management system instructs the management system to store the issued token in the user wallet.

[0071] The emission rights trading support system generates the consumption signal based on the consumption calculated by the carbon dioxide consumption calculation method according to any one of [7] to [9] and transmits the consumption signal.

[0072] The emission trading support system

[10] can provide rewards to users who contribute to the consumption (reduction) of carbon dioxide by granting tokens to the user's wallet. In addition, when carbon dioxide is consumed in a carbon dioxide utilization device, the emission trading support system can more accurately calculate the amount of carbon dioxide consumed and can more appropriately issue tokens based on the calculated consumption amount.

[0073]

[11] The carbon dioxide emission rights trading support system according to

[10] , wherein:

[0074] When a sale request for requesting to sell the token stored in the user wallet is notified to the management system from the user terminal, the management system transfers the token from the user wallet to the administrator wallet based on the sale request.

[0075] The auxiliary system of

[11] above performs the transfer of tokens from the user wallet to the administrator wallet based on a request. As a result, tokens held in the user wallet can be transferred to the administrator wallet at any time by a sale request, making it easier for users to use tokens more freely.

[0076]

[12] The carbon dioxide emission rights trading support system according to

[11] , wherein:

[0077] When an emitter account corresponds to an emitter wallet and a purchase request for purchasing the token is notified to the management system from the emitter terminal corresponding to the emitter account, the management system transfers the token from the manager wallet to the emitter wallet based on the purchase request.

[0078] When there is a sale request from the user terminal and a purchase request from the emitter terminal, the auxiliary system

[12] executes the transfer of tokens from the administrator wallet to the emitter wallet based on the request. In this way, the tokens in the user wallet can be temporarily transferred to the administrator wallet and then transferred to the emitter wallet. Even if there is a difference in the timing of the sale request and the purchase request, the auxiliary system can easily transfer the tokens in the user wallet to the emitter wallet.

[0079]

[13] The carbon dioxide emission rights trading support system according to

[10] or

[11] , wherein:

[0080] When an emitter account corresponds to an emitter wallet, and a purchase request for requesting to purchase the token is notified to the management system from the emitter terminal corresponding to the emitter account, and a sale request for requesting to sell the token held by the user wallet is notified to the management system from the user terminal, the management system transfers the token from the user wallet to the emitter wallet based on the purchase request and the sale request.

[0081] Regarding the auxiliary system

[13] described above, when there is a sale request from a user terminal and a purchase request from an emitter terminal, the management system executes the transfer of tokens from the user wallet to the emitter wallet based on the request. This allows the tokens to be transferred from the user wallet to the emitter wallet without temporarily storing them in the administrator's wallet. Therefore, this auxiliary system can further reduce the burden on the administrator's wallet.

[0082]

[14] A method for assisting carbon dioxide emission trading, wherein a management system and a manager wallet are used.

[0083] The management system includes a token issuing unit for issuing tokens.

[0084] The manager wallet corresponds to the management system.

[0085] In the case where a user account corresponds to a user wallet and a consumption signal for notifying the management system of the amount of carbon dioxide consumption is sent from a user terminal corresponding to the user account, the token issuing unit issues the token based on the consumption signal, and the management system instructs the management system to store the issued token in the user wallet.

[0086] The consumption signal is generated and transmitted based on the consumption calculated by the carbon dioxide consumption calculation method according to any one of [7] to [9].

[0087] <First embodiment>

[0088] 1. Overview of Carbon Dioxide Utilization System 9

[0089] exist Figure 1, a carbon dioxide utilization system 9 is exemplified. Carbon dioxide utilization system 9 is also simply referred to as utilization system 9. Utilization system 9 primarily includes a raw material feed unit 81, a carbon dioxide utilization device 80, and a carbon dioxide consumption calculation system 70. Carbon dioxide utilization device 80 is also simply referred to as utilization device 80. Carbon dioxide consumption calculation system 70 is also simply referred to as consumption calculation system 70. Utilization system 9 is a system that consumes carbon dioxide fed as a raw material to generate products derived from carbon dioxide, and can calculate the amount of carbon dioxide consumed during this generation process.

[0090] The raw material feeding section 81 includes a carbon dioxide supply section 90, a first supply path 91, a regulating valve 92, a check valve 93, a hydrogen supply section 94, a second supply path 95, a regulating valve 96, a check valve 97, a merging path 98, and a gate valve 99. The raw material feeding section 81 is a section where various raw materials for producing a product derived from carbon dioxide (e.g., methane) are fed.

[0091] The carbon dioxide supply unit 90 is equivalent to an example of a supply unit. The carbon dioxide supply unit 90 functions as a source of carbon dioxide. The carbon dioxide supply unit 90 is, for example, a tank that can accommodate and hold liquid carbon dioxide. The carbon dioxide in the carbon dioxide supply unit 90 is, for example, carbon dioxide produced at a carbon dioxide production site (such as a factory, etc.) that is recovered and liquefied by a known method. However, there is no limitation on the method for preparing the carbon dioxide to be put into the carbon dioxide supply unit 90, and various known methods can be used. The first supply path 91 is equivalent to an example of a raw material supply path, and functions as a flow path for allowing carbon dioxide to flow between the carbon dioxide supply unit 90 (supply unit) and the utilization device 80. The first supply path 91 is a path for supplying carbon dioxide from the carbon dioxide supply unit 90 to the utilization device 80. The first supply path 91 is a pipe for the carbon dioxide (first raw gas) supplied from the carbon dioxide supply unit 90 to pass through, and is provided with a regulating valve 92 and a check valve 93 in sequence from upstream to downstream.

[0092] The hydrogen supply unit 94 is a tank that can accommodate and hold hydrogen produced by a known hydrogen manufacturing system (for example, a hydrogen manufacturing system using a solid oxide electrolytic cell (SOEC)). The second supply path 95 is a pipe for the hydrogen (second raw gas) supplied from the hydrogen supply unit 94 to pass through, and a regulating valve 96 and a check valve 97 are arranged in sequence from upstream to downstream. The confluent path 98 is a confluent pipe connected to the downstream end of each of the first supply path 91 and the second supply path 95. It is a pipe for converging the carbon dioxide flowing in through the first supply path 91 and the hydrogen flowing in through the second supply path 95 and then leading to the side of the reaction vessel 82. A gate valve 99 is arranged in the confluent path 98. The carbon dioxide as the first raw gas and the hydrogen as the second raw gas are set to the optimal mixing ratio through the regulating valves 92 and 96, respectively, and the mixed gas (raw gas) mixed with the two raw gases is supplied to the reaction vessel 82 through the gate valve 99. In a typical example, the carbon dioxide supplied from the carbon dioxide supply unit 90 and the hydrogen supplied from the hydrogen supply unit 94 are mixed at a molar ratio of 1:4, and the carbon dioxide and hydrogen are supplied to the reaction container 82 at this molar ratio.

[0093] Utilization device 80 is an apparatus that uses carbon dioxide supplied from a carbon dioxide supply unit 90 as a raw material to produce a product derived from carbon dioxide. Utilization device 80 includes a reaction vessel 82, a heater 83, a condenser 84, a downstream flow path 85, a tank 87, and the like. In the representative example described below, utilization device 80 is configured as a methanation device that reacts multiple raw materials (including carbon dioxide) supplied from a raw material supply unit 81 to produce methane as a product derived from carbon dioxide.

[0094] The reaction vessel 82 is a vessel in which the mixed gas flowing in through the merging path 98 flows and reacts. The reaction vessel 82 is set to an appropriate pressure and heated by the heater 83, causing the Sabatier reaction represented by the following chemical reaction formula to produce methane (methanization).

[0095] CO2+4H2→CH4+2H2O

[0096] Figure 2 It is a cross-sectional view illustrating the structure inside the reaction container 82 . Figure 2The arrows shown indicate the direction in which the raw gas flows through reaction vessel 82. Reaction vessel 82 contains catalysts 82X and 82Z, and a low-activity catalyst 82Y. Reaction vessel 82 includes a first portion 82A, a second portion 82B, and a third portion 82C, sequentially arranged along the direction of the raw gas flow (from upstream to downstream). This structure allows the gas to flow in the order of first portion 82A, second portion 82B, and third portion 82C. When the raw gas mixed with hydrogen and carbon dioxide is fed into reaction vessel 82 from confluent path 98, the raw gas passes through first portion 82A, second portion 82B, and third portion 82C in sequence, and a chemical reaction occurs within reaction vessel 82 to produce methane and water.

[0097] In a representative example, first portion 82A and third portion 82C contain catalysts 82X and 82Z, respectively, and second portion 82B contains a low-activity catalyst 82Y having a catalytic activity lower than that of catalysts 82X and 82Z. Catalysts 82X, 82Z, and low-activity catalyst 82Y reduce the activation energy of a chemical reaction, facilitating the chemical reaction. Low catalytic activity means that the degree to which the activation energy of a chemical reaction is reduced is small. Furthermore, in a representative example, the catalytic activity of catalyst 82X in first portion 82A is the same as that of catalyst 82Z in third portion 82C, or the catalytic activity of catalyst 82X in first portion 82A is lower than that of catalyst 82Z in third portion 82C. Furthermore, in a representative example, the thickness of first portion 82A in the direction of raw gas flow is smaller than the thickness of third portion 82C in the direction of raw gas flow. However, this is not limited to this representative example. As long as the structure can produce methane (methanation) as represented by the chemical reaction equation CO₂ + 4H₂ → CH₄ + 2H₂O, the details within reaction vessel 82 can be modified in various ways. For example, the type of catalyst and the thicknesses of first portion 82A, second portion 82B, and third portion 82C are not limited to the examples above and can be modified in various ways. Furthermore, in the representative example, first portion 82A, second portion 82B, and third portion 82C are provided to form three zones, but the structure can also be divided into four or more zones, or even two or fewer zones.

[0098] Catalysts 82X, 82Z, and low-activity catalyst 82Y can be used without limitation, and any catalyst suitable for various chemical reactions. Examples of catalysts 82X, 82Z, and low-activity catalyst 82Y include powders, pellets, or porous structures in which particles are supported on a carrier. Examples of the carrier include powders, pellets, or porous structures of oxides including one or more of alumina, silica, magnesia, titania, zirconia, niobium pentoxide, silica-alumina, zeolite, and calcium phosphate. The porous structure has air permeability that allows the raw material gas to pass through. Furthermore, the raw material gas passes through the gaps between the powder and pellets.

[0099] Examples of the particles supported on the carrier include metals including one or more of Fe, Co, Ni, Cu, Ru, Rh, Pd, Ag, Ir, Pt, and Au. Regarding the catalyst, if the carrier and particles are made of the same material and have the same particle size, the catalytic activity is proportional to the surface area of ​​the particles supported by the carrier. Therefore, by making the surface area of ​​the particles supported by the carrier smaller than that of catalysts 82X and 82Z, a low-activity catalyst 82Y is obtained.

[0100] Alternatively, low-activity catalyst 82Y can be obtained by mixing inert particles having no catalytic activity with catalysts 82X and 82Z to reduce the amount of catalysts 82X and 82Z contained in a certain amount. Examples of the inert particles include powders or pellets of oxides including one or more of alumina, silica, magnesia, titania, zirconia, niobium pentoxide, silica-alumina, zeolite, and calcium phosphate.

[0101] The product produced by the reaction in reaction vessel 82 is fed to condenser 84 connected downstream of reaction vessel 82, where it is cooled and separated into methane-containing gas and water. The "methane-containing gas" separated by condenser 84 may contain both hydrogen and carbon dioxide from the raw material gas, or may not contain either or both. In a representative example of the first embodiment, carbon dioxide and hydrogen are mixed at a molar ratio of 1:4 in the raw material feeding section 81, and carbon dioxide and hydrogen are supplied to reaction vessel 82 at this molar ratio. In other words, in this representative example, all carbon dioxide is consumed during the reaction, so the "methane-containing gas" separated by condenser 84 is methane that does not contain carbon dioxide. This methane, as a product derived from carbon dioxide, flows through downstream flow path 85. The methane flowing through downstream flow path 85 is compressed by, for example, a compressor (not shown) and stored in tank 87. Tank 87 is, for example, a methane cylinder for storing compressed methane.

[0102] 2. Details of the Carbon Dioxide Consumption Calculation System 70

[0103] The consumption calculation system 70 is a system for calculating the amount of carbon dioxide consumed by the utilization device 80. In addition to calculating carbon dioxide consumption, the consumption calculation system 70 also has various other functions. The consumption calculation system 70 primarily includes a first detection unit 71, a second detection unit 72, and a data processing device 75.

[0104] The first detection unit 71 is a device that detects a first parameter related to carbon dioxide supplied via the first supply path 91. In a representative example, the first detection unit 71 detects the flow rate of CO2 (carbon dioxide) flowing through the first supply path 91. The first detection unit 71 includes, for example, a flow meter and a gas chromatograph. The flow meter measures the flow rate of the gas flowing through the first supply path 91. The gas chromatograph measures the concentration (volume ratio) of each component (CO2, H2O, etc.) contained in the gas flowing through the first supply path 91. For example, if the flow rate of gas flowing through first supply path 91 measured by the flowmeter included in first detection unit 71 is 100 L / min, and the volume ratio of CO2 in the gas flowing through first supply path 91 is determined to be 20 vol% and the volume ratio of H2O is 0 vol% based on the measurement results of the gas chromatograph included in first detection unit 71, the volume ratio of H2 is determined to be 80 vol%. Based on the above flow rates and the volume ratios of the gases, the flow rate of CO2 flowing through first supply path 91 can be determined to be 20 L / min, the flow rate of H2 flowing through first supply path 91 can be determined to be 80 L / min, and the flow rate of H2O flowing through first supply path 91 can be determined to be 0 L / min. In this example, the flow rate of CO2 flowing through first supply path 91 corresponds to an example of the first parameter.

[0105] The second detection unit 72 is a device that detects a second parameter related to the carbon dioxide contained in the product generated by the carbon dioxide utilization device 80. In a representative example, the second detection unit 72 detects the flow rate of methane flowing through the downstream flow path 85. The second detection unit 72 includes, for example, a flow meter and a gas chromatograph. The flow meter measures the flow rate of gas in the downstream flow path through which the product generated by the utilization device 80 flows. The gas chromatograph measures the concentration (volume ratio) of each component contained in the gas flowing through the downstream flow path. For example, if the flow rate of gas flowing through the downstream flow path 85 measured by the flow meter included in the second detection unit 72 is 60 L / min, and the volume ratio of CO2 in the gas flowing through the downstream flow path 85 is determined to be 0 vol%, the volume ratio of H2O is 67 vol%, the volume ratio of CH4 is 33 vol%, and the volume ratio of CO is 0 vol% based on the measurement results of the gas chromatograph included in the second detection unit 72, the flow rate of CO2 flowing through the downstream flow path 85 can be determined to be 0 L / min, the flow rate of H2O flowing through the downstream flow path 85 can be determined to be 40 L / min, the flow rate of CH4 flowing through the downstream flow path 85 can be determined to be 20 L / min, and the flow rate of CO flowing through the downstream flow path 85 can be determined to be 0 L / min. In this example, the flow rate of CO2 flowing through the downstream flow path 85 corresponds to an example of the second parameter.

[0106] The data processing device 75 is equivalent to an example of a calculation unit. The data processing device 75 calculates the consumption of carbon dioxide consumed in the utilization device 80 based on the above-mentioned first parameter and second parameter. For example, the data processing device 75 (calculation unit) can calculate the consumption in the utilization device 80 based on the difference between the supply amount of carbon dioxide determined based on the first parameter and the residual amount of carbon dioxide in the product determined based on the second parameter. The calculated "consumption in the utilization device 80" can be either the consumption per unit time or the total consumption within a specified calculation object period. For example, the difference (X1-X2) between the flow rate X1 of CO2 flowing through the first supply path 91 and the flow rate X2 of CO2 flowing through the downstream flow path 85 can also be calculated as the consumption of carbon dioxide (specifically, the consumption per unit time). For example, in the above-mentioned specific example, the flow rate X1 of CO2 flowing through the first supply path 91 is 20 L / min, and the flow rate X2 of CO2 flowing through the downstream flow path 85 is 0 L / min, so 20 L / min, which is the difference between them (X1-X2), can also be set as the consumption of carbon dioxide in the utilization device 80.

[0107] The data processing device 75 (calculation unit) includes a program for calculating the consumption amount based on the first parameter and the second parameter. The program includes a calculation formula or a table for calculating the consumption amount using the first parameter and the second parameter as variables.

[0108] The data processing device 75 functions as a recording unit that records data containing at least one of the first and second parameters in the cloud. The cloud can be a cloud system including the blockchain 110 described later, or a non-blockchain storage system (including a storage system such as a server). Here, the data containing at least one of the first and second parameters can be measurement data, but can also be data converted by hashing, or data hashed together with a serial number corresponding to the detection unit. The following representative example illustrates an example in which data containing the first and second parameters is hashed and stored in the blockchain 110.

[0109] The data processing device 75 functions as a recording unit that hashes either the first parameter or the second parameter and records it in the blockchain. In this embodiment, the utilization system 9 includes multiple nodes 102. Each node 102 is a device that implements a blockchain. The blockchain implemented by multiple nodes 102 can be a public chain, a private chain, or other types of blockchains.

[0110] When the utilization system 9 is implemented as a private chain, when data is collected by the data processing device 75, a transaction representing the data content is generated, and the generated transaction is verified and authenticated by multiple nodes 102. Furthermore, a specified node such as an administrator node (e.g., node 102 constituting the utilization system 9) or a node designated by the administrator node calculates a hash value, and uses the calculated hash value to form a block with the authenticated transaction. The constructed block is appended to the blockchain and stored in a distributed manner on each node 102. On the other hand, when the utilization system 9 is implemented as a public chain, when data is collected, a transaction representing the collected data content is generated, and the generated transaction is verified and authenticated by the node 102. Furthermore, any miner calculates a hash value, and uses the calculated hash value to form a block with the authenticated transaction. The constructed block is appended to the blockchain and stored in a distributed manner on each node 102.

[0111] The data processing device 75 also functions as a recording unit that hashes the change history of the above-mentioned program (the program that calculates the consumption amount based on the first parameter and the second parameter) and records it in the blockchain.

[0112] The data processing device 75 or a management device different from the data processing device 75 can also function as a comparison unit. In this case, when at least one of the first detection unit 71 and the second detection unit 72 generates current data including at least one of the first parameter and the second parameter, the comparison unit can compare and contrast the data recorded in the cloud before the current data is generated with the current data. In this example, it is desirable that the data recorded in the cloud and the current data are, for example, hashed data. In addition, data based on the sequence values ​​obtained by the first detection unit 71 and the second detection unit 72 can also be compared. The data processing device 75 or the management device that stores the data recorded in the cloud can also perform data comparison at specified intervals (for example, every hour).

[0113] 3. Structure of the CO2 Emissions Trading System 1

[0114] Figure 3 This is an explanatory diagram conceptually showing a carbon dioxide emission rights trading system 1. The carbon dioxide emission rights trading system 1 is also referred to as a trading system 1. In the representative trading system 1 described below, at least the consumption calculation system 70, the management system 10, and the administrator wallet 20 ( Figure 5 ) to realize the carbon dioxide emission trading auxiliary system 8. In addition, Figure 3 、 Figure 4 In the example, the administrator wallet 20 is omitted. Figure 5 ).exist Figure 3, the consumption calculation system 70 is omitted. The carbon dioxide emission rights trading auxiliary system 8 is also referred to as the auxiliary system 8 for short.

[0115] The transaction system 1 has a plurality of nodes 2. Each node 2 is a device for implementing a blockchain. The blockchain implemented by the plurality of nodes 2 can be a public chain, a private chain, or other types of blockchains. Figure 3 The blockchain 100 shown and Figure 1 The blockchain 110 shown may be a different blockchain or a common blockchain.

[0116] In the case where the transaction system 1 is implemented as a private chain, when each transaction described later is executed, an item representing the content of the transaction is generated, and the generated item is verified and authenticated by multiple nodes 2. In addition, a specified node such as an administrator node (for example, node 2 constituting the management system 10) or a node designated by the administrator node calculates a hash value, and uses the calculated hash value to form a block with the authenticated items. The constructed block is appended to the blockchain and is stored in a decentralized manner on each node 2. On the other hand, in the case where the transaction system 1 is implemented as a public chain, when each transaction described later is executed, an item representing the content of the transaction is generated, and the generated item is verified and authenticated by node 2. In addition, any miner calculates a hash value, and uses the calculated hash value to form a block with the authenticated items. The constructed block is appended to the blockchain and is stored in a decentralized manner on each node 2.

[0117] Each node 2 constituting the trading system 1 is constituted by an information processing device such as a server or a personal computer. Figure 3 In the example, six nodes 2 are shown, but the number of nodes 2 can be more than Figure 3 There are many examples, and you can also compare Figure 3 There are few examples.

[0118] Some of the multiple nodes 2 constitute the management system 10. The management system 10 has a control unit 11, a communication unit 12, a storage unit 13, an input unit 14, an output unit 15, etc. The storage unit 13 is a device that stores programs, parameters, etc. The control unit 11 executes various functions and processes of the node 2 according to various data such as programs and parameters stored in the storage unit 13. The communication unit 12 is a device that cooperates with the control unit 11 to perform wired or wireless communication with an external device. The input unit 14 is an input device such as an operating device, and the output unit 15 is an output device such as a display device. The management system 10 can be composed of one device (for example, a server device) or a plurality of devices.

[0119] Some of the multiple nodes 2 constitute a user terminal 30. The user terminal 30 includes a control unit 31, a communication unit 32, a storage unit 33, an input unit 34, an output unit 35, and the like. The hardware configuration of the user terminal 30 may be the same as or different from that of the management system 10.

[0120] Some of the multiple nodes 2 constitute the emitter terminal 50. The emitter terminal 50 includes a control unit 51, a communication unit 52, a storage unit 53, an input unit 54, an output unit 55, and the like. The hardware structure of the emitter terminal 50 may be the same as or different from the hardware structure of the management system 10.

[0121] exist Figure 3 In the figure, the specific structure of the node 2 other than the management system 10 , the user terminal 30 , and the discharger terminal 50 is omitted, but any node 2 whose specific structure is omitted can also be configured as the user terminal 30 or the discharger terminal 50 . Figure 3 The user terminal 30 shown may also have the function of the discharger terminal 50. The discharger terminal 50 may also have the function of the user terminal 30.

[0122] like Figure 4 In this way, the management system 10 includes a token issuing unit 10A and a certificate issuing unit 10B. In the representative example described below, the control unit 11 ( Figure 3 ) functions as a token issuing unit 10A and a certificate issuing unit 10B. The token issuing unit 10A issues tokens. The certificate issuing unit 10B issues emission rights certificates and consumption certificates. Tokens are virtual currencies or rights used for transactions in the trading system 1.

[0123] like Figure 4 In this way, the above-mentioned usage device 80 and the above-mentioned consumption calculation system 70 are installed at a base having the user terminal 30 .

[0124] In this embodiment, if Figure 5 As shown in (A), each administrator is assigned an administrator account, which in turn is associated with an administrator wallet 20. The administrator account and the administrator wallet are stored in association on blockchain 100. The administrator account is identification information used to identify the administrator. The administrator is the entity responsible for managing the issuance of tokens. In blockchain 100, once the administrator account is identified, the contents of administrator wallet 20 are also determined. Administrator wallet 20 is a wallet associated with management system 10 and a virtual location for storing tokens (administrator tokens) handled by management system 10. It is a virtual location associated with the administrator account.

[0125] In this embodiment, a user account is allocated to each user, and a user wallet 40 is associated with the user account. Figure 5 As shown in (B), each user account is stored in the blockchain 100 in correspondence with each user wallet. The user account is an account corresponding to the user wallet, and is identification information for determining the user. The user is the subject who receives the issuance of tokens by consuming carbon dioxide. The user wallet is a virtual place for storing tokens held by the user, and is a virtual storage place corresponding to the user account. In the blockchain 100, for example, if the user account A1 is determined, the content of the user wallet A2 corresponding to the user account A1 is determined. The user terminal 30 is a terminal used when conducting communications and transactions based on the user account, and is a terminal corresponding to the user account. The user terminal 30 can have a consumption calculation system 70 ( Figure 4 ), and can also be separated from the consumption calculation system 70.

[0126] In this embodiment, each emitter is assigned an emitter account, and the emitter account corresponds to an emitter wallet 60. For example, Figure 5 As in (C), each emitter account is stored in the blockchain 100 in correspondence with each emitter wallet. The emitter account is an account corresponding to the emitter wallet, and is identification information for identifying the emitter. The emitter is the subject who purchases the token. In addition, the user sometimes becomes the emitter, and the emitter sometimes becomes the user. The emitter wallet is a virtual place for storing the tokens held by the emitter, and is a virtual storage place corresponding to the emitter account. In the blockchain 100, for example, if the emitter account P1 is determined, the content of the emitter wallet P2 corresponding to the emitter account P1 is determined. The emitter terminal 50 ( Figure 3 etc.) are terminals used for communication and transactions based on emitter accounts.

[0127] 4. Operation of the Carbon Dioxide Emissions Trading System 1

[0128] In the transaction system 1 , the user terminal 30 has the function of generating and sending a consumption signal based on the monitoring results of the consumption calculation system 70 . Specifically, the user terminal 30 generates and sends a consumption signal based on the consumption calculated by the consumption calculation method performed by the consumption calculation system 70 .

[0129] When carbon dioxide is consumed by the carbon dioxide utilization device 80, the consumption calculation system 70 detects the amount consumed by the carbon dioxide utilization device 80 and provides the consumed amount to the user terminal 30. When the carbon dioxide consumption is obtained from the consumption calculation system 70, as shown in FIG. Figure 6 In this way, the user terminal 30 sends a consumption signal containing information about the consumption to the management system 10. The consumption calculation system 70 continuously monitors the consumption of carbon dioxide per unit time (L / min) in the utilization device 80, and therefore can also calculate the amount (volume or weight) of carbon dioxide consumed in the utilization device 80 at regular intervals (every few hours, every other day, every few days, etc.). In such an example, the user terminal 30 can also obtain a calculated value (consumption) every time the consumption calculation system 70 calculates the "consumption of carbon dioxide per fixed time in the utilization device 80", and send a consumption signal containing the obtained calculated value (consumption) to the management system 10 every time the calculated value is obtained. In addition, the calculation object period for the consumption calculation system 70 to calculate the consumption in the utilization device 80 is not limited to every fixed time, but can also be any time period.

[0130] like Figure 6 In this way, when a consumption signal (a signal for notifying the user of the carbon dioxide consumption amount) is transmitted from the user terminal 30 corresponding to the user account to the management system 10, the token issuing unit 10A ( Figure 4 ) issues tokens based on the consumption signal. The carbon dioxide consumption of each token has been predetermined, and the token issuing unit 10A converts the consumption determined by the consumption signal sent by the user terminal 30 into tokens based on this information. The carbon dioxide consumption of each token is, for example, 1t. In this example, when the carbon dioxide consumption determined by the consumption signal is 10t, the token issuing unit 10A issues 10 tokens. When issuing tokens, the token issuing unit 10A issues tokens in a manner that specifies the validity period. The validity period can be, for example, from the date of issuance until a specified number of days have passed (for example, until 8 years have passed), or it can be until the arrival of a predetermined year, month, and day.

[0131] The token issuing unit 10A also functions as a deactivation unit, invalidating tokens when their expiration date has expired. The token issuing unit 10A can deactivate tokens by instructing wallets holding expired tokens to delete them, or by using other methods.

[0132] When the token issuing unit 10A issues tokens, the management system 10 (e.g., the token issuing unit 10A) instructs the issued tokens to be stored in the user wallet 40. Alternatively, the management system 10 (e.g., the token issuing unit 10A) may instruct the issued tokens to be directly stored in the user wallet 40. Alternatively, the management system 10 may instruct the token issuing unit 10A to temporarily store the tokens in the administrator wallet 20 and then transfer the stored tokens to the user wallet 40 for storage. In either case, the issued tokens are ultimately stored in the user wallet 40.

[0133] When the token issuing unit 10A provides a token to the user wallet 40 based on the consumption signal sent from the user terminal 30 to the management system 10, the certificate issuing unit 10B of the management system 10 issues a consumption certificate to the user account based on the above-mentioned consumption signal. The consumption certificate contains information for proving that the carbon dioxide consumption determined by the above-mentioned consumption signal has been consumed. The consumption certificate contains the name or title of the user determined by the above-mentioned user account and the fact that the above-mentioned carbon dioxide consumption has been consumed as information, and may also contain the information of the certifier (for example, the name or title of the administrator). It is desirable that the above-mentioned consumption certificate is electronic data containing symbols such as text and numbers, images, etc. In the case where the consumption certificate is the above-mentioned electronic data, the user terminal 30 that can communicate and trade based on the user account can obtain the above-mentioned consumption certificate. In the case where the above-mentioned consumption certificate is issued (assigned) to the user account, the user terminal 30 can keep or use the consumption certificate as electronic data, and can also form the consumption certificate on a medium such as paper by printing or the like.

[0134] In this embodiment, the management system 10 hashes at least one (preferably both) of the consumption signal history and the token transaction history, and records them on the blockchain. Thus, all consumption signal history records provided to the management system 10 and all token transaction history records between multiple nodes 2 are hashed and recorded on the blockchain.

[0135] like Figure 6 Thus, in the management system 10 , when a sale request for selling tokens stored in the user wallet 40 is notified from the user terminal 30 to the management system 10 , the management system 10 transfers the tokens from the user wallet 40 to the administrator wallet 20 based on the sale request.

[0136] Furthermore, when a purchase request for purchasing tokens is notified to the management system 10 from the emitter terminal 50 corresponding to the emitter account, the management system 10 transfers the tokens from the administrator wallet 20 to the emitter wallet 60 based on the purchase request. Furthermore, the purchase request provided from the emitter terminal 50 to the management system 10 may specify only the amount of tokens or the amount of tokens and the minimum validity period.

[0137] like Figure 6In this way, if tokens are stored in the emitter's wallet 60, after the emitter's terminal 50 notifies the management system 10 of an issuance request for emission rights certificates, the management system 10 deletes the tokens stored in the emitter's wallet 60 based on the issuance request, and the certificate issuing unit 10B issues emission rights certificates to the emitter's account. In this way, the emitter can use tokens (for example, purchased tokens) and receive emission rights certificates as the certificates used. In addition, the issuance request can be made with the amount of tokens stored in the wallet as the upper limit, or it can be made to use only a portion of the stored tokens. For example, if the emitter's wallet 60 holds 10 tokens, the emitter's terminal 50 can receive any number of emission rights certificates by notifying the issuance request within the range of 1 to 10 tokens. The emission rights certificates are certificates that prove the use of tokens. Specifically, the management system 10 deletes the number of tokens requested by the issuance request from the tokens stored (held) by the emitter wallet 60, and grants the emitter's account an emission rights certificate containing information confirming that the deleted number of tokens has been used. The emission rights certificate may include, for example, information indicating that the number of tokens requested by the issuance request has been used, and may also include the emitter's name or title, as determined by the emitter's account, and information about a certifier (e.g., the name or title of an administrator). Preferably, the emission rights certificate is electronic data containing characters, symbols such as numbers, and images. If the emission rights certificate is electronic data, the emitter terminal 50, which is capable of communication and transactions based on the emitter's account, can obtain the emission rights certificate. Once the emission rights certificate is issued (granted) to the emitter's account, the emitter terminal 50 can retain or use the emission rights certificate as electronic data, or may print the emission rights certificate onto a medium such as paper. In this specification, a "predetermined number of tokens" functions as the right to emit carbon dioxide equivalent to the predetermined number of tokens. Furthermore, "using tokens held (held) by the emitter wallet 60" also means using emission rights in an amount equivalent to the amount of tokens used (deleted tokens). Therefore, the emission rights certificate may also include information identifying the emission rights used (for example, information certifying the right (emission rights) to emit an amount of carbon dioxide equivalent to the amount of tokens used (deleted)).

[0138] In addition, you can also Figure 6 Such a transaction is set Figure 7 Like that. Figure 7In this example, when a purchase request for tokens is notified to the management system 10 from the emitter terminal 50, and a sell request is notified to the management system 10 from the user terminal 30 to sell tokens held by the user wallet 40, the management system 10 executes an event to transfer the tokens from the user wallet 40 to the emitter wallet 60 based on these purchase and sell requests. These events instruct the tokens to be directly transferred from the user wallet 40 to the emitter wallet 60. Upon receiving these events, the user terminal 30 processes the tokens to be directly transferred from the user wallet 40 to the emitter wallet 60. In this example, when there is a sell request from the user terminal 30 and a buy request from the emitter terminal 50, the support system 8 matches the sell request with the buy request, thereby enabling the tokens to be transferred from the user wallet 40 to the emitter wallet 60 without requiring temporary storage in the administrator wallet 20. Consequently, this support system 8 can further reduce the burden on the administrator wallet 20.

[0139] 5. Effect Examples

[0140] The consumption calculation system 70 can detect a first parameter related to the carbon dioxide supplied via the first supply path 91 using the first detection unit 71. Furthermore, the second detection unit 72 can detect a second parameter related to the carbon dioxide contained in the product generated by the carbon dioxide utilization device 80. The consumption calculation method implemented by the consumption calculation system 70 can more accurately calculate the amount of carbon dioxide consumed in the carbon dioxide utilization device 80 by reflecting the first parameter obtained in the path before the carbon dioxide is administered and the second parameter based on the product obtained after the carbon dioxide is administered.

[0141] Specifically, the consumption calculation method implemented by the consumption calculation system 70 can further accurately calculate the "amount of carbon dioxide consumed in the carbon dioxide utilization device 80" based on the difference between the "supply amount of carbon dioxide determined based on the first parameter" and the "residual amount of carbon dioxide in the product determined based on the second parameter".

[0142] The consumption calculation system 70 includes a recording unit (data processing device 75) that hashes at least one of the first and second parameters and records them on a blockchain. Therefore, the consumption calculation system 70 can manage at least one of the first and second parameters using a blockchain. This improves the ability to prevent unauthorized tampering with parameters, allowing system operation while ensuring parameter reliability.

[0143] The consumption calculation system 70 includes a recording unit (data processing device 75) that hashes program change history and records it on a blockchain. This allows the program change history to be managed using a blockchain. This improves the ability to prevent unauthorized program tampering. Consequently, the consumption calculation system 70 can operate while ensuring program reliability.

[0144] When current data including at least one of the first parameter and the second parameter is generated, the consumption calculation system 70 can compare and verify the current data with data recorded in the cloud before the current data is generated.

[0145] The emissions trading support system 8 can provide rewards to users who contribute to the consumption (reduction) of carbon dioxide by granting tokens to the user wallet 40. Furthermore, when carbon dioxide is consumed by the device 80, the emissions trading support system 8 can more accurately calculate the amount of carbon dioxide consumed and more appropriately issue tokens based on the calculated consumption amount.

[0146] <Second embodiment>

[0147] The following description involves Figure 8 、 Figure 9 The carbon dioxide consumption calculation system 270 according to the second embodiment and the carbon dioxide utilization system 209 using the same are shown. The carbon dioxide consumption calculation system 270 is also simply referred to as the consumption calculation system 270. The carbon dioxide utilization system 209 is also simply referred to as the utilization system 209.

[0148] The utilization system 209 to which the consumption calculation system 270 of the second embodiment is applied is different from the utilization system 9 ( Figure 1 ) is different in that: the carbon dioxide utilization device 280 is used instead of the carbon dioxide utilization device 80; and the third detection unit 73 is used. Other aspects are the same as the above-mentioned utilization system 9 ( Figure 1 ) is the same, therefore, the use of system 209 and the use of system 9 ( Figure 1 ) The same structures as those of the utilization system 9 are marked with the same reference numerals, and detailed descriptions are omitted. The carbon dioxide utilization device 280 is also simply referred to as the utilization device 280.

[0149] In addition, the above-mentioned emission rights trading auxiliary system 8 ( Figure 4The emission trading support system 8 is realized by including the consumption calculation system 70 according to the first embodiment, but the emission trading support system 8 can also be realized by including the consumption calculation system 270 according to the second embodiment instead of the consumption calculation system 70. In this case, the only difference between the above-mentioned emission trading support system 8 and the above-mentioned emission trading support system 8 ( Figure 4 etc.), and other aspects are the same as the above-mentioned emission rights trading auxiliary system 8 ( Figure 4 etc.) are the same.

[0150] exist Figure 8 In the utilization system 209, the structure and function of the raw material feeding unit 81 are the same as those of the utilization system 9 ( Figure 1 ) is the same as the raw material feeding part 81.

[0151] Utilization device 280 is an apparatus that uses carbon dioxide supplied from carbon dioxide supply unit 90 as a raw material to produce a product derived from carbon dioxide. Utilization device 280 includes a reaction vessel 82, a heater 83, a condenser 84, a downstream flow path 284, a separation unit 281, a product path 285, an exhaust path 286, a tank 87, and the like. In the example described below, utilization device 280 is configured as a methanation device that reacts multiple raw materials (including carbon dioxide) supplied from a raw material supply unit 81 to produce methane as a product derived from carbon dioxide.

[0152] The reaction vessel 82 is a vessel in which the mixed gas flowing in through the merging path 98 flows and reacts. The reaction vessel 82 is set to a moderate pressure and heated by the heater 83. For example, the Sabatier reaction and the water-gas shift reaction represented by the following chemical reaction formula occur to produce methane.

[0153] 3CO2+6H2→CH4+2CO+4H2O

[0154] The product produced in the reaction vessel 82 is cooled by the condenser 84 and separated into methane-containing gas and water, and the methane-containing gas is sent to the downstream flow path 284. The "methane-containing gas" separated by the condenser 84 may also contain hydrogen and carbon dioxide of the raw material gas.

[0155] A separation section 281 is provided in the downstream flow path 284 on the downstream side of the condenser 84. In a representative example, the separation section 281 is a separation membrane for selectively separating CH4 from the gas (gas containing methane) passing through the downstream flow path 284. The separation section 281 separates gas mainly composed of CH4 and other gases from the gas passing through the downstream flow path 284, thereby allowing CH4 to flow to the product path 285, and allowing other gases (gases other than the gas flowing to the product path 285) to flow to the exhaust path 286. The gas fed into the product path 285 may be CH4 only, or may contain a small amount of gas other than CH4. The methane flowing through the product path 285 is compressed by, for example, a compressor not shown in the figure and stored in a container connected to the product path 285. Figure 1 Same can 87.

[0156] In this example, the first detection unit 71 also measures the concentration (volume ratio) of each component (CO2, H2O, etc.) contained in the gas flowing through the first supply path 91 using the same method as in the first embodiment, and also measures the flow rate of the gas flowing through the first supply path 91. For example, if the flow rate of the gas flowing through the first supply path 91 measured by the flowmeter included in the first detection unit 71 is 90 L / min, and the volume ratio of CO2 in the gas flowing through the first supply path 91 is determined to be 33 vol% and the volume ratio of H2O is 0 vol% based on the measurement results of the gas chromatograph included in the first detection unit 71, the volume ratio of H2 is determined to be 67 vol%. Based on these flow rates and the volume ratios of the gases, the flow rate of CO2 flowing through the first supply path 91 can be determined to be 30 L / min, the flow rate of H2 flowing through the first supply path 91 can be determined to be 60 L / min, and the flow rate of H2O flowing through the first supply path 91 can be determined to be 0 L / min. In this example, the flow rate X1 of CO 2 flowing through the first supply path 91 corresponds to an example of the first parameter.

[0157] The second detection unit 72 detects a second parameter related to carbon dioxide contained in the product (gas passing through the product path 285) within the product path 285 provided downstream of the utilization device 80. The second detection unit 72 includes a flow meter and a gas chromatograph, and measures the volume ratios of CH4, CO2, CO, and H2O in the gas flowing through the product path 285, as well as the gas flow rate of the gas flowing through the product path 285. For example, if the flow rate of gas flowing through product path 285 measured by the flowmeter included in second detection unit 72 is 5 L / min, and the volume ratio of CO2, H2O, CH4, and CO in the gas flowing through product path 285 is determined to be 0 vol%, 0 vol%, 100 vol%, and 0 vol% based on the measurement results of the gas chromatograph included in second detection unit 72, the flow rate of CO2 flowing through product path 285 can be determined to be 0 L / min, the flow rate of H2O flowing through product path 285 can be determined to be 0 L / min, the flow rate of CH4 flowing through product path 285 can be determined to be 5 L / min, and the flow rate of CO flowing through product path 285 can be determined to be 0 L / min. In this example, the flow rate X2 of CO2 flowing through product path 285 corresponds to an example of the second parameter.

[0158] The third detector 73 detects a third parameter related to "carbon dioxide contained in the exhaust gas" within an exhaust path 286 disposed downstream of the utilization device 280 so that the exhaust gas excluding the product passes therethrough. Specifically, the third detector 73 measures the volume ratios of CO2, CO, and H2O in the gas flowing through the exhaust path 286, as well as the gas flow rate of the gas flowing through the exhaust path 286. For example, if the flow rate of gas flowing through exhaust path 286 measured by the flowmeter included in third detection unit 73 is 75 L / min, and the volume ratio of CO2, H2O, CH4, and CO in the gas flowing through exhaust path 286 is determined to be 20 vol%, 27 vol%, 0 vol%, and 13 vol% based on the measurement results of the gas chromatograph included in third detection unit 73, the flow rate of CO2 flowing through exhaust path 286 can be determined to be 15 L / min, the flow rate of H2O flowing through exhaust path 286 can be determined to be 20 L / min, the flow rate of CH4 flowing through exhaust path 286 can be determined to be 0 L / min, the flow rate of CO flowing through exhaust path 286 can be determined to be 10 L / min, and the flow rate of H2 flowing through exhaust path 286 can be determined to be 30 L / min. In this example, the flow rate X3 of CO2 flowing through exhaust path 286 corresponds to an example of the third parameter. Furthermore, CO flowing through the exhaust path 286 can also be used as fuel or the like.

[0159] The data processing device 75 (calculation unit) calculates the consumption based on the first parameter, the second parameter, and the third parameter. For example, the value (X1-X2-X3) obtained by further subtracting the flow rate X3 of CO2 flowing through the exhaust path 286 from the difference (X1-X2) between the flow rate X1 of CO2 flowing through the first supply path 91 and the flow rate X2 of CO2 flowing through the product path 285 can be calculated as the consumption of carbon dioxide. In the specific example described above, the flow rate X1 of CO2 flowing through the first supply path 91 is 30 L / min, the flow rate X2 of CO2 flowing through the product path 285 is 0 L / min, and the flow rate X3 of CO2 flowing through the exhaust path 286 is 15 L / min. Therefore, in this case, 15 L / min, which corresponds to the value of X1-X2-X3, can be calculated as the consumption of carbon dioxide consumed by the utilization device 80 (specifically, the consumption per unit time).

[0160] As described above, when the aforementioned product (methane) and exhaust gas other than the aforementioned product are generated in the utilization device 280, the consumption calculation system 270 according to the second embodiment can detect a third parameter related to carbon dioxide contained in the exhaust gas using the third detection unit 73. Furthermore, the consumption calculation system 270 can more accurately calculate the "amount of carbon dioxide consumed in the carbon dioxide utilization device 280" by reflecting the first parameter obtained in the path before the carbon dioxide is injected, the second parameter based on the aforementioned product (methane) obtained after the carbon dioxide is injected, and the third parameter based on the carbon dioxide contained in the remaining exhaust gas.

[0161] <Other Implementations>

[0162] The present disclosure is not limited to the embodiments described above and illustrated in the accompanying drawings. The features of the embodiments described above or below may be combined in any manner consistent with the present disclosure. Furthermore, any feature in the embodiments described above or below may be omitted if not explicitly stated as essential. Furthermore, the features of the embodiments described above may also be modified as follows.

[0163] In the above embodiment, the carbon dioxide utilization device 80, 280 is a methanation device, but it is not limited to this example. Any device that can use carbon dioxide as a raw material to produce a product derived from carbon dioxide other than carbon dioxide can be used. For example, the carbon dioxide utilization device 80, 280 can also be an ethanol production device. In this case, as long as it is Figure 1 、 Figure 8 The raw material feeding portion 81 is similarly configured, and ethanol is produced in the reaction container 82 using hydrogen and carbon dioxide as raw materials according to the following chemical reaction formula.

[0164] 6H2+2CO2→CH3CH2OH+3H2O

[0165] For example, in Figure 1 In an example of an embodiment in which the configuration is applied to ethanol production, similar to the first embodiment, the flow rate (gas flow rate) of the gas flowing through first supply path 91 and the volume ratios of CO2 and H2O in the gas flowing through first supply path 91 are measured by first detection unit 71. For example, if the flow rate of gas flowing through first supply path 91 is 80 L / min, and the volume ratio of CO2 in the gas flowing through first supply path 91 is determined to be 25 vol% and 0 vol% based on the measurement results of the gas chromatograph included in first detection unit 71, the volume ratio of H2 is determined to be 75 vol%. Based on these flow rates and the volume ratios of the gases, the flow rate of CO2 flowing through first supply path 91 can be determined to be 20 L / min, the flow rate of H2 flowing through first supply path 91 can be determined to be 60 L / min, and the flow rate of H2O flowing through first supply path 91 can be determined to be 0 L / min. In this example, the flow rate X1 of CO2 flowing through first supply path 91 corresponds to an example of the first parameter.

[0166] Furthermore, the second detection unit 72 detects the flow rate of gas flowing through the downstream flow path 85. For example, if the flow rate of gas flowing through the downstream flow path 85 measured by the flowmeter included in the second detection unit 72 is 40 L / min, and the volume ratio of CO2 in the gas flowing through the downstream flow path 85 is determined to be 0 vol%, 75 vol%, 25 vol%, and 0 vol% based on the measurement results of the gas chromatograph included in the second detection unit 72, the flow rate of CO2 flowing through the downstream flow path 85 can be determined to be 0 L / min, the flow rate of H2O flowing through the downstream flow path 85 can be determined to be 30 L / min, the flow rate of ethanol flowing through the downstream flow path 85 can be determined to be 10 L / min, and the flow rate of CO flowing through the downstream flow path 85 can be determined to be 0 L / min. In this example, the flow rate X2 of CO2 flowing through the downstream flow path 85 corresponds to an example of the second parameter.

[0167] In this example, the data processing device 75 can also calculate the carbon dioxide consumption in the utilization device 80 based on the above-mentioned first parameter and second parameter, for example, the difference between the first parameter and the second parameter (X1-X2) can be set as the carbon dioxide consumption in the utilization device 80.

[0168] In the first embodiment and other embodiments obtained by modifying the first embodiment, the difference (X1-X2) between the first parameter and the second parameter itself can be used as the carbon dioxide consumption in the utilization device 80. However, a value obtained by performing some kind of correction operation on the difference (X1-X2) can also be used as the carbon dioxide consumption in the utilization device 80. Similarly, in the second embodiment, a value obtained by performing some kind of correction operation on the above-mentioned value (X1-X2-X3) can also be used as the carbon dioxide consumption in the utilization device 280.

[0169] In the above-described embodiment, the consumption calculation system does not include a "supply unit" or a "carbon dioxide utilization device." However, the present invention is not limited to this configuration and may include either or both of the "supply unit" and the "carbon dioxide utilization device." For example, using the first embodiment as an example, either or both of the carbon dioxide supply unit 90 and the carbon dioxide utilization device 80 may be included as components of the consumption calculation system 70.

[0170] In the above embodiment, the first parameter is the flow rate X1, but any first parameter can be used as long as it can determine the amount of CO2 flowing through the first supply path 91. For example, the flow rate of the gas flowing through the first supply path 91 or the volume ratio of CO2, H2O, and H2 in the gas flowing through the first supply path 91 can also be the first parameter. Alternatively, the first parameter may not be the amount flowing per unit time, but may be the volume of carbon dioxide introduced into the reaction vessel 82 within a specified time, or may be another indicator (such as pressure or temperature) that can determine the volume.

[0171] In the first embodiment, the second parameter is the flow rate X2 described above, but any second parameter may be used as long as it can determine the amount of CO2 flowing through the downstream flow path 85. For example, the flow rate of the gas flowing through the downstream flow path 85 or the volume ratio of CO2, H2O, and H2 in the gas flowing through the downstream flow path 85 may also be the second parameter. Alternatively, the second parameter may not be the amount flowing per unit time, but may be the volume of carbon dioxide delivered to the tank 87 within a specified time, or may be another indicator (such as pressure or temperature) that can determine this volume.

[0172] In the second embodiment, the second parameter is the flow rate X2 described above, but any parameter that can determine the amount of CO2 flowing through the product path 285 may be used. For example, the flow rate of the gas flowing through the product path 285 or the volume ratio of CO2, H2O, and H2 in the gas flowing through the product path 285 may also be the second parameter. Alternatively, the second parameter may be the volume of carbon dioxide delivered to the tank 87 within a predetermined time period, or another indicator (such as pressure or temperature) that can determine this volume.

[0173] In the second embodiment, the third parameter may be any parameter capable of determining the amount of CO2 flowing through exhaust path 286. For example, the flow rate of gas flowing through exhaust path 286 or the volume ratio of CO2, H2O, and H2 in the gas flowing through exhaust path 286 may serve as the second parameter. Alternatively, the second parameter may be the volume of carbon dioxide passing through exhaust path 286 within a predetermined time period, or another indicator capable of determining this volume (such as pressure or temperature).

[0174] In the above embodiment, the auxiliary system 8 is composed of the management system 10 and the administrator wallet 20. However, in any embodiment, the auxiliary system 8 may include either or both of the user terminal 30 and the emitter terminal 50. Alternatively, the auxiliary system 8 may include either or both of the user wallet 40 and the emitter wallet 60.

[0175] The embodiments disclosed herein are to be considered in all respects as illustrative and non-restrictive. The scope of the present invention is not limited to the embodiments disclosed herein, but is intended to include all modifications within the scope of the claims or within the scope equivalent to the claims.

[0176] Description of Reference Numerals

[0177] 8: Emission trading auxiliary system; 9: Carbon dioxide utilization system; 10: Management system; 10A: Token issuance unit; 20: Administrator wallet; 30: User terminal; 40: User wallet; 70, 270: Consumption calculation system; 71: First detection unit; 72: Second detection unit; 73: Third detection unit; 75: Data processing device (calculation unit, recording unit, change history recording unit, data recording unit, comparison unit); 80, 280: Carbon dioxide utilization device; 90: Carbon dioxide supply unit (supply unit); 91: First supply path (raw material supply path); 100: Blockchain; 110: Blockchain; 270: Consumption calculation system; 281: Separation unit; 285: Product path; 286: Exhaust path.

Claims

1. A carbon dioxide consumption calculation system, comprising: a first detection unit disposed in a raw material supply path between a supply unit as a supply source of carbon dioxide and a carbon dioxide utilization device, and detecting a first parameter related to carbon dioxide supplied through the raw material supply path, the carbon dioxide utilization device producing a product derived from carbon dioxide using the carbon dioxide supplied from the supply unit as a raw material; a second detection unit that detects a second parameter related to carbon dioxide contained in the product generated by the carbon dioxide utilization device; as well as A calculation unit calculates a consumption amount of carbon dioxide consumed in the carbon dioxide utilization device based on the first parameter and the second parameter.

2. The carbon dioxide consumption calculation system according to claim 1, wherein: The calculation unit calculates the consumption amount based on a difference between a supply amount of carbon dioxide determined based on the first parameter and a residual amount of carbon dioxide in the product determined based on the second parameter.

3. The carbon dioxide consumption calculation system according to claim 1 or 2, wherein: The second detection unit detects the second parameter related to carbon dioxide contained in the product in the product path provided on the downstream side of the carbon dioxide utilization device. The carbon dioxide consumption calculation system further includes a third detection unit that detects a third parameter related to carbon dioxide contained in the exhaust gas in an exhaust path provided on the downstream side of the carbon dioxide utilization device so that the exhaust gas other than the product passes therethrough. The calculation unit calculates the consumption amount based on the first parameter, the second parameter, and the third parameter.

4. The carbon dioxide consumption calculation system according to any one of claims 1 to 3, wherein: It also includes a recording unit that hashes at least one of the first parameter and the second parameter and records it in the blockchain.

5. The carbon dioxide consumption calculation system according to any one of claims 1 to 4, wherein: The calculation unit includes a program for calculating the consumption amount based on the first parameter and the second parameter. The carbon dioxide consumption calculation system further includes a change history recording unit, which hashes the change history of the program and records it in a blockchain.

6. The carbon dioxide consumption calculation system according to any one of claims 1 to 5, wherein: Also features: a data recording unit configured to record data including at least one of the first parameter and the second parameter in a cloud; as well as A comparison unit, when at least any one of the first detection unit and the second detection unit generates current data including at least any one of the first parameter and the second parameter, the comparison unit compares the data recorded in the cloud before generating the current data with the current data.

7. A method for calculating carbon dioxide consumption, wherein: The consumption of carbon dioxide consumed in a carbon dioxide utilization device is calculated based on a first parameter and a second parameter, wherein the first parameter is a parameter related to carbon dioxide supplied via a raw material supply path between a supply unit serving as a supply source of carbon dioxide and the carbon dioxide utilization device, the carbon dioxide utilization device uses the carbon dioxide supplied from the supply unit as a raw material to manufacture a product derived from carbon dioxide, and the second parameter is a parameter related to the carbon dioxide contained in the product generated by the carbon dioxide utilization device.

8. The method for calculating carbon dioxide consumption according to claim 7, wherein: The consumption amount is calculated based on a difference between a supply amount of carbon dioxide determined based on the first parameter and a residual amount of carbon dioxide in the product determined based on the second parameter.

9. The method for calculating carbon dioxide consumption according to claim 7, wherein: having a third parameter related to carbon dioxide contained in the exhaust gas in an exhaust gas path provided on the downstream side of the carbon dioxide utilization device so as to allow the exhaust gas other than the product to pass therethrough, In the carbon dioxide consumption calculation method, the consumption is calculated based on the first parameter, the second parameter, and the third parameter.

10. A carbon dioxide emission rights trading auxiliary system, comprising: A management system having a token issuing unit for issuing tokens; and The administrator wallet corresponds to the management system. in, When a user account corresponds to a user wallet and a consumption signal for notifying the consumption of carbon dioxide is sent from a user terminal corresponding to the user account to the management system, the token issuing unit issues the token based on the consumption signal, and the management system instructs the issued token to be stored in the user wallet. The emission rights trading supporting system generates the consumption signal based on the consumption amount calculated by the carbon dioxide consumption amount calculation method according to any one of claims 7 to 9, and transmits the consumption signal.

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