JP7432997B2 - Composite production system and compound production method - Google Patents

Description

The present disclosure relates to a compound production system and method for producing a compound.

In order to reduce carbon dioxide emissions associated with the use of fossil fuels, it is necessary to pursue all technological options. If carbon dioxide can be recovered from carbon dioxide-containing gas and used as a resource for synthetic products (fuels, chemical materials, etc.), it will be possible to economically and rationally suppress carbon dioxide emissions into the atmosphere.

As a proposal for the utilization of carbon dioxide, for example, Patent Document 1 describes a system that synthesizes hydrogen obtained by electrolysis of water or seawater and carbon dioxide separated from the exhaust gas of a power generation device to generate fuel. is disclosed.

Japanese Patent Application Publication No. 11-46460

As in Patent Document 1, when hydrogen is produced by electrolysis of water or seawater for use exclusively in the production of synthetic products, the cost of obtaining hydrogen is high, so the production cost of the synthetic product is high. . On the other hand, when using by-product hydrogen, which is hydrogen generated as a by-product of a process other than the process to produce the compound, the cost of obtaining hydrogen is low, so the cost of producing the compound is low. Become.

In view of the above-mentioned circumstances, at least one embodiment of the present invention aims to provide a compound production system and a compound production method capable of producing a compound using by-product hydrogen.

(1) The compound production system according to at least one embodiment of the present invention includes:
a by-product hydrogen discharge plant that discharges by-product hydrogen;
a carbon dioxide emission plant that discharges carbon dioxide-containing gas;
a synthesis plant that produces a composite by synthesizing the by-product hydrogen and carbon dioxide contained in the carbon dioxide-containing gas;
a flow rate adjustment device configured to guide the carbon dioxide, the flow rate of which is adjusted with respect to the flow rate of the by-product hydrogen supplied to the synthesis plant, to the synthesis plant;
Equipped with.

In the configuration (1) above, a composite is produced using carbon dioxide-containing gas discharged from a carbon dioxide discharge plant and by-product hydrogen discharged from a by-product hydrogen discharge plant. In this case, since the cost of obtaining hydrogen is low, the production cost of the composite can be lowered.

By the way, when producing high-purity synthetic products such as fuels and chemical materials, it is necessary to adjust the supply amounts of carbon dioxide and hydrogen to a ratio based on the chemical reaction formula in the synthesis. In the case of electrolysis, the amount of hydrogen generated can be adjusted, so by adjusting the amount of hydrogen generated depending on the carbon dioxide supply status, it is possible to adjust the ratio of the carbon dioxide and hydrogen supply amounts. However, when using by-product hydrogen, it is difficult to adjust the amount of hydrogen generated or supplied. Furthermore, when the amount of hydrogen emitted is small relative to the amount of carbon dioxide emitted, it is preferable to have a high hydrogen utilization rate in order to maximize the yield of the composite.

In this regard, in the configuration (1) above, the flow rate adjustment device is configured to guide carbon dioxide whose flow rate is adjusted to the synthesis plant with respect to the flow rate of by-product hydrogen supplied to the synthesis plant. In this case, since the amount of carbon dioxide supplied is adjusted according to the amount of by-product hydrogen supplied, it is possible to increase the utilization rate of hydrogen.

(2) In some embodiments, in the configuration of (1) above,
The flow rate adjustment device is
a carbon dioxide recovery device that recovers the carbon dioxide from the carbon dioxide-containing gas discharged from the carbon dioxide emission plant;
a recovery amount adjustment unit configured to control the amount of carbon dioxide recovered by the carbon dioxide recovery device;
including.

According to the configuration (2) above, the carbon dioxide is controlled to be recovered from the carbon dioxide-containing gas according to the amount of hydrogen generated or supplied, so that an unnecessary amount of carbon dioxide is not recovered. It becomes possible to Thereby, the cost for recovering highly pure carbon dioxide from carbon dioxide-containing gas can be reduced.

(3) In some embodiments, in the configuration of (1) or (2) above, the compound production system:
comprising a by-product hydrogen storage device for accumulating the by-product hydrogen discharged from the by-product hydrogen discharge plant,
The by-product hydrogen storage device is configured to be able to supply the by-product hydrogen to the synthesis plant.

According to the configuration (3) above, it becomes possible to stably supply by-product hydrogen to the synthesis plant. For example, even if the amount of by-product hydrogen discharged from a by-product hydrogen discharging plant fluctuates to the extent that it deviates from the range that corresponds to the adjustable range of the flow rate of carbon dioxide led to the synthesis plant by the flow regulating device, the by-product hydrogen By utilizing the storage device, by-product hydrogen can be supplied to the synthesis plant within an adjustable range of carbon dioxide flow rate. Thereby, the operation rate of the synthesis plant can be improved.

(4) In some embodiments, in the configuration of (3) above, the compound production system:
comprising a first supply line for supplying the by-product hydrogen discharged from the by-product hydrogen discharge plant to the synthesis plant,
The by-product hydrogen storage device is installed in a first supply branch line branching from the first supply line.

According to the configuration (4) above, since the by-product hydrogen storage device is provided in the first supply branch line branched from the first supply line, the by-product hydrogen is transferred to the first supply branch line without going through the by-product hydrogen storage device. It is also possible to feed the synthesis plant from one feed line. In this case, even when the synthesis plant is in operation, it is possible to perform maintenance on the by-product hydrogen storage device by disconnecting the by-product hydrogen storage device from the first supply line. This makes it possible to improve the operation rate of the synthesis plant.

(5) In some embodiments, in the configuration of (3) or (4) above,
The flow rate adjustment device is configured to control the flow rate of the carbon dioxide according to the remaining amount of the by-product hydrogen storage device.

According to the configuration (5) above, for example, when the remaining amount of the by-product hydrogen storage device (i.e., the storage amount of by-product hydrogen) is less than the threshold value (for example, 10% of the rating) indicating a lack of remaining amount, the carbon dioxide control to lower the flow rate of carbon dioxide than usual, and increase the flow rate of carbon dioxide higher than usual when the remaining amount of the by-product hydrogen storage device exceeds a threshold (for example, 90% of the rated capacity) indicating that the capacity is slightly exceeded. It becomes possible to perform control, etc. Therefore, it is possible to reduce the possibility that the remaining amount of the by-product hydrogen storage device becomes excessively low or excessive.

(6) In some embodiments, in the configuration of any one of (1) to (5) above, the compound production system:
comprising a carbon dioxide storage device for storing the carbon dioxide,
The carbon dioxide storage device is configured to be able to supply the carbon dioxide to the synthesis plant.

According to the configuration (6) above, it becomes possible to stably supply carbon dioxide to the synthesis plant. For example, even if the amount of by-product hydrogen discharged from a by-product hydrogen discharge plant fluctuates to the extent that it deviates from the range that corresponds to the adjustable range of the amount of carbon dioxide captured, by using a carbon dioxide storage device, Carbon dioxide can be supplied to the synthesis plant in an amount close to that corresponding to the amount of by-product hydrogen. Thereby, the operation rate of the synthesis plant can be improved.

(7) In some embodiments, in the configuration of (6) above, the compound production system:
comprising a second supply line for supplying the carbon dioxide contained in the carbon dioxide-containing gas discharged from the carbon dioxide emission plant to the synthesis plant;
The carbon dioxide storage device is installed in a second supply branch line branched from the second supply line.

According to the configuration (7) above, since the carbon dioxide storage device is provided in the second supply branch line branched from the second supply line, carbon dioxide is transferred to the second supply line without passing through the carbon dioxide storage device. It can also be supplied to a synthesis plant from In this case, even when the synthesis plant is in operation, it is possible to perform maintenance on the carbon dioxide storage device by disconnecting the carbon dioxide storage device from the second supply line. This makes it possible to improve the operation rate of the synthesis plant.

(8) In some embodiments, in the configuration of (6) or (7) above,
The flow rate adjustment device is
a carbon dioxide recovery device that recovers the carbon dioxide from the carbon dioxide-containing gas discharged from the carbon dioxide emission plant and supplies the carbon dioxide to the carbon dioxide storage device and the synthesis plant;
a recovery amount adjustment unit configured to control the amount of carbon dioxide recovered by the carbon dioxide recovery device;
including;
The flow rate adjustment device is configured to control the amount of carbon dioxide recovered according to the remaining amount of the carbon dioxide storage device.

According to the configuration (8) above, for example, when the remaining amount of the carbon dioxide storage device (i.e., the amount of stored carbon dioxide) falls below the threshold value (for example, 10% of the rating) indicating a lack of remaining amount, the carbon dioxide is recovered. Control to reduce the amount of carbon dioxide than usual, control to increase the amount of carbon dioxide recovered than usual when the remaining amount of the carbon dioxide storage device exceeds a threshold value (for example, 90% of the rated value) indicating that the capacity is slightly exceeded It becomes possible to do the following. Therefore, it is possible to reduce the possibility that the remaining amount of the carbon dioxide storage device becomes excessively low or excessive.

(9) In some embodiments, in any one of the configurations (1) to (8) above,
The by-product hydrogen discharge plant is a plant that produces caustic soda, and generates the by-product hydrogen in salt electrolysis for producing the caustic soda.

The carbon dioxide and hydrogen supplied to the synthesis plant need to be purified to a high degree of purity. If the by-product hydrogen contains impurities, for example, the reaction rate or reaction rate during production of the composite may decrease, which may impede production of the composite. In this regard, according to configuration (9) above, the by-product hydrogen discharge plant discharges high-purity by-product hydrogen, so that the cost required for hydrogen purification processing can be reduced.

(10) In some embodiments, in the configuration according to any one of (1) to (9) above, at least a part of the power generated by the carbon dioxide emission plant is supplied to the byproduct hydrogen emission plant or the synthesis plant. supply

According to the configuration (10) above, by supplying at least a portion of the power generated by the carbon dioxide emission plant to the by-product hydrogen emission plant or the synthesis plant, it is possible to improve the efficiency of energy use.

(11) In some embodiments, in the configuration of any one of (1) to (10) above, exhaust heat from the carbon dioxide emission plant is supplied to the synthesis plant.

According to the configuration (11) above, the synthesis plant utilizes the exhaust heat of the carbon dioxide emitting plant, thereby making it possible to improve the efficiency of energy use.

(12) In some embodiments, in any one of the configurations (1) to (11) above,
The exhaust heat of the carbon dioxide evacuation plant is used for heating for reacting the carbon dioxide and the by-product hydrogen in the synthesis plant.

According to the configuration (12) above, the synthesis plant uses the exhaust heat of the carbon dioxide emitting plant for heating for reacting carbon dioxide and by-product hydrogen in the synthesis plant, thereby improving the efficiency of energy use. I can do it.

(13) In some embodiments, in the configuration of any one of (1) to (11) above, the exhaust heat of the carbon dioxide emitting plant is used to purify a final product from the composite of the synthesis plant. Used in heating for

According to the configuration (13) above, the synthesis plant uses the exhaust heat of the carbon dioxide emitting plant for heating for refining the final product from the composite, so it is possible to improve the efficiency of energy use.

(14) In some embodiments, in the configuration of any one of the above (1) to (13), the by-product hydrogen discharge plant uses the pure water supplied from the carbon dioxide discharge plant to produce caustic soda. generate.

According to the configuration (14) above, since the by-product hydrogen discharge plant and the carbon dioxide discharge plant share pure water, it is possible to simplify the equipment for supplying pure water.

(15) In some embodiments, in the configuration of any one of (1) to (14) above, the compound production system is configured to remove impurities from the raw water to produce pure water, and the A pure water supply device is provided for supplying the pure water to the by-product hydrogen discharge plant and the carbon dioxide discharge plant.

In the configuration (15) above, since the synthetic product production system, the by-product hydrogen discharge plant, and the carbon dioxide discharge plant share the pure water supply device, it is possible to simplify the equipment for supplying pure water.

(16) In some embodiments, in any one of the configurations (1) to (8) above,
The carbon dioxide emitting plant discharges the carbon dioxide-containing gas obtained by reforming naphtha,
The by-product hydrogen discharge plant discharges by-product hydrogen obtained by performing hydrogen purification on the hydrogen-containing gas obtained from the carbon dioxide-containing gas discharged by the carbon dioxide discharge plant.

The configuration (16) above is applicable to oil refineries.

(17) In some embodiments, in the configuration of (16) above, the compound production system:
comprising a carbon dioxide recovery device that recovers the carbon dioxide from the carbon dioxide-containing gas discharged from the carbon dioxide emission plant;
The by-product hydrogen discharge plant performs hydrogen purification on the hydrogen-containing gas after the carbon dioxide recovery device has recovered the carbon dioxide.

In the configuration (17) above, the by-product hydrogen discharge plant performs hydrogen purification on the hydrogen-containing gas (carbon dioxide lean gas) after recovering carbon dioxide, so by-product hydrogen can be efficiently acquired. . Furthermore, since the volume to be processed by the by-product hydrogen discharge plant is smaller than when processing carbon dioxide-containing gas (carbon dioxide-rich gas), the by-product hydrogen discharge plant can be downsized (reduced in capacity).

(18) In some embodiments, in the configuration of (16) above, the compound production system:
comprising a carbon dioxide recovery device that recovers the carbon dioxide from the carbon dioxide-containing gas discharged from the carbon dioxide emission plant;
The by-product hydrogen discharge plant includes a hydrogen purification device provided on a flow path through which the carbon dioxide-containing gas flows from the carbon dioxide discharge plant to the carbon dioxide recovery device.

In the configuration (18) above, the carbon dioxide recovery device efficiently recovers carbon dioxide because it recovers carbon dioxide from the carbon dioxide-containing gas (hydrogen lean gas) after the by-product hydrogen discharge plant performs hydrogen purification. be able to. In addition, compared to the case where carbon dioxide is recovered from carbon dioxide-containing gas (hydrogen-rich gas) before hydrogen purification, the volume that the carbon dioxide recovery equipment processes is smaller, so the carbon dioxide recovery equipment can be made smaller (lower capacity). ) Can be done.

(19) In some embodiments, in the configuration of (17) or (18) above,
The flow rate adjustment device controls the recovery rate of the carbon dioxide recovery device to guide the carbon dioxide to the synthesis plant, the flow rate of which has been adjusted relative to the flow rate of the by-product hydrogen supplied to the synthesis plant. It is configured as follows.

In the configuration (19) above, for example, if the carbon dioxide recovery rate is controlled based on the amount of carbon dioxide required when producing a composite with a hydrogen recovery rate of 100%, the carbon dioxide emitting plant can emit Even if the composition of the carbon dioxide-containing gas changes, the hydrogen recovery rate can be fixed at 100%.

(20) In some embodiments, in the configuration of (16) above, the compound production system includes:
a carbon dioxide recovery device that recovers the carbon dioxide from the carbon dioxide-containing gas;
at least one valve for adjusting a flow rate ratio between a main stream line connected to the carbon dioxide recovery device and a bypass line that bypasses the carbon dioxide recovery device;
Equipped with.

In the configuration (20) above, by adjusting the flow rate ratio between the main line and the bypass line, the volume of carbon dioxide-containing gas processed by the carbon dioxide recovery device can be reduced, so the carbon dioxide recovery device can be made smaller (smaller). Capacity) possible.

(21) In some embodiments, in the configuration of (20) above,
The flow rate adjustment device is configured to guide the carbon dioxide to the synthesis plant, the flow rate of which has been adjusted relative to the flow rate of the by-product hydrogen supplied to the synthesis plant, by controlling the flow rate ratio. There is.

In the configuration (21) above, for example, by controlling the flow rate ratio, the carbon dioxide recovery rate and the hydrogen recovery rate can be fixed.

(22) In some embodiments, in any one of the configurations (1) to (21) above,
The synthesis plant produces at least one of methanol, methane, and dimethyl ether as the synthetic product.

According to the configuration (22) above, it is possible to produce a composite with excellent storage stability compared to hydrogen gas.

(23) The method for producing a compound according to at least one embodiment of the present invention includes:
a by-product hydrogen discharge step for discharging by-product hydrogen;
a carbon dioxide evacuation step for emitting carbon dioxide-containing gas;
a synthetic product production step of producing a synthetic product by synthesizing the by-product hydrogen and carbon dioxide contained in the carbon dioxide-containing gas;
A flow rate in which a portion of the carbon dioxide discharged in the carbon dioxide discharge step is extracted and the flow rate is adjusted relative to the flow rate of the by-product hydrogen used in the composite product production step, and the carbon dioxide is introduced into synthesis. an adjustment step;
Equipped with.

According to the method (23) above, a composite is produced using the carbon dioxide-containing gas discharged in the carbon dioxide discharge step and the by-product hydrogen discharged in the by-product hydrogen discharge step. In this case, since the cost of obtaining hydrogen is low, the production cost of the composite can be lowered. In addition, in the flow rate adjustment step, carbon dioxide whose flow rate is adjusted relative to the flow rate of by-product hydrogen used in the synthetic product production step is introduced into the synthesis. In this case, since the amount of carbon dioxide supplied is adjusted according to the amount of by-product hydrogen supplied, it is possible to increase the utilization rate of hydrogen.

According to at least one embodiment of the present invention, it is possible to provide a compound production system and a compound production method capable of producing a compound using by-product hydrogen.

1 is a diagram schematically showing the configuration of a compound production system according to an embodiment of the present invention. 1 is a diagram schematically showing the configuration of a compound production system according to one embodiment. 1 is a diagram schematically showing the configuration of a compound production system according to one embodiment. 1 is a diagram schematically showing the configuration of a compound production system according to one embodiment. 1 is a diagram schematically showing the configuration of a compound production system according to one embodiment. 1 is a diagram schematically showing the configuration of a compound production system according to one embodiment. 1 is a diagram schematically showing the configuration of a compound production system according to one embodiment. 1 is a diagram schematically showing the configuration of a compound production system according to one embodiment. 1 is a diagram schematically showing the configuration of a compound production system according to one embodiment. FIG. 1 is a diagram schematically showing the configuration of a synthesis plant according to an embodiment. 1 is a diagram schematically showing the configuration of a compound production system according to one embodiment. 1 is a diagram schematically showing the configuration of a compound production system according to one embodiment. 1 is a diagram schematically showing the configuration of a compound production system according to one embodiment. 1 is a diagram schematically showing the configuration of a compound production system according to one embodiment. 1 is a flowchart illustrating a method for producing a compound according to an embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of the components described as the embodiments or shown in the drawings are not intended to limit the scope of the present invention thereto, and are merely illustrative examples. do not have.
For example, expressions expressing relative or absolute positioning such as "in a certain direction,""along a certain direction,""parallel,""orthogonal,""centered,""concentric," or "coaxial" are strictly In addition to representing such an arrangement, it also represents a state in which they are relatively displaced with a tolerance or an angle or distance that allows the same function to be obtained.
For example, expressions such as "same,""equal," and "homogeneous" that indicate that things are in an equal state do not only mean that things are exactly equal, but also have tolerances or differences in the degree to which the same function can be obtained. It also represents the existing state.
For example, expressions expressing shapes such as squares and cylinders do not only refer to shapes such as squares and cylinders in a strict geometric sense, but also include uneven parts and chamfers to the extent that the same effect can be obtained. Shapes including parts, etc. shall also be expressed.
On the other hand, the expressions "comprising,""comprising,""comprising,""containing," or "having" one component are not exclusive expressions that exclude the presence of other components.

1 to 9 and 11 to 14 respectively show a compound production system 100 (100A, 100B, 100C, 100D, 100E, 100F, 100G, 100H, 100I, 100J, 100K) according to an embodiment of the present invention. , 100L, 100M). The composite production system 100 is a system that produces composites such as fuels and chemical materials. For example, compounds include methanol, methane, dimethyl ether (DME), and the like.

In some embodiments, as shown, for example, in FIGS. 1-9 and 11-14, a composite production system 100 includes a by-product hydrogen discharge plant 10 that discharges by-product hydrogen and a carbon dioxide-containing gas. a carbon dioxide emission plant 20 that emits by-product hydrogen; a synthesis plant 30 that produces a composite by synthesizing by-product hydrogen and carbon dioxide contained in a carbon dioxide-containing gas; A flow rate adjustment device 40 configured to guide carbon dioxide whose flow rate is adjusted to the synthesis plant 30 is provided.

According to this configuration, the composite production system 100 produces a composite using the carbon dioxide-containing gas discharged from the carbon dioxide discharge plant 20 and the by-product hydrogen discharged from the by-product hydrogen discharge plant 10. do. In this case, since the cost of obtaining hydrogen is low, the production cost of the composite can be lowered.

Further, the flow rate adjustment device 40 is configured to guide carbon dioxide to the synthesis plant 30, the flow rate of which has been adjusted relative to the flow rate of by-product hydrogen supplied to the synthesis plant 30. In this case, since the amount of carbon dioxide supplied is adjusted according to the amount of by-product hydrogen supplied, it is possible to increase the utilization rate of hydrogen.

In some embodiments, as shown, for example, in FIGS. 1-9 and 11-14, the flow regulator 40 recovers carbon dioxide from the carbon dioxide-containing gas discharged from the carbon dioxide emission plant 20. It includes a carbon dioxide recovery device 42 and a recovery amount adjustment section 41 configured to control the amount of carbon dioxide recovered by the carbon dioxide recovery device 42. In order to adjust the flow rate of carbon dioxide with respect to the flow rate of by-product hydrogen, the flow rate adjustment device 40 includes, for example, a sensor (not shown) that measures the hydrogen flow rate in the supply pipe to the synthesis plant 30, and a by-product hydrogen storage device. A sensor (not shown) for measuring the remaining amount of 50 or the like may be provided.

The carbon dioxide recovery device 42 may be configured to separate and recover carbon dioxide using a PSA (Pressure Swing Adsorption) method, or may be configured to separate and recover carbon dioxide using an amine absorption method, for example. In the recovery method using the PSA method, for example, the amount or rate of recovery of carbon dioxide is adjusted by repeating pressurization and depressurization. In the recovery method using the amine absorption method, the amount or rate of recovery of carbon dioxide is adjusted by adjusting the flow rate of the absorption liquid.

The recovery amount adjustment unit 41 may be configured to adjust the recovery rate of the carbon dioxide recovery device 42, or adjust the amount of carbon dioxide-containing gas led to the carbon dioxide recovery device 42 and the carbon dioxide recovery device instead of the recovery rate. The amount of carbon dioxide-containing gas released to the outside without being led to 42 may be adjusted. Therefore, the exhaust gas from the carbon dioxide recovery device 42 may contain carbon dioxide-containing gas that is released to the outside without being led to the carbon dioxide recovery device 42, or the exhaust gas may contain carbon dioxide-containing gas that is led to the carbon dioxide recovery device 42. Of these, the off-gas after recovering carbon dioxide may be used.

According to such a configuration, the amount of carbon dioxide is controlled to be recovered from the carbon dioxide-containing gas according to the amount of hydrogen generated or supplied, so that an unnecessary amount of carbon dioxide is not recovered. becomes possible. Thereby, the cost for recovering highly pure carbon dioxide from carbon dioxide-containing gas can be reduced.

In some embodiments, as shown, for example, in FIGS. 1-6 and 9, the composite production system 100 includes a by-product hydrogen discharge plant 10 for storing by-product hydrogen discharged from a by-product hydrogen discharge plant 10. It may be configured to include a storage device 50 and to be able to supply by-product hydrogen from the by-product hydrogen storage device 50 to the synthesis plant 30 . The by-product hydrogen storage device 50 is a device for storing hydrogen, and is, for example, a hydrogen storage alloy, a storage tank, or the like.

According to this configuration, by-product hydrogen can be stably supplied to the synthesis plant 30. For example, even if the amount of by-product hydrogen discharged from the by-product hydrogen discharge plant 10 fluctuates to the extent that it deviates from the range that corresponds to the adjustable range of the flow rate of carbon dioxide that the flow rate adjustment device 40 leads to the synthesis plant 30, By using the by-product hydrogen storage device 50, by-product hydrogen within an adjustable range of the flow rate of carbon dioxide can be supplied to the synthesis plant 30. Thereby, the operating rate of the synthesis plant 30 can be improved.

In some embodiments, for example, as shown in FIG. 2, the composite production system 100 includes a first supply line for supplying by-product hydrogen discharged from the by-product hydrogen discharge plant 10 to the synthesis plant 30. In addition, the by-product hydrogen storage device 50 may be provided in a first supply branch line branched from the first supply line. In addition, in FIG. 2, the supply route from the by-product hydrogen storage device 50 to the synthesis plant 30 is another supply line provided in parallel with the first supply line. However, the supply route from the by-product hydrogen storage device 50 to the synthesis plant 30 may be the first supply line. That is, the by-product hydrogen storage device 50 may be configured to supply by-product hydrogen to the first supply line, or may be configured to supply by-product hydrogen from the first supply line.

According to such a configuration, since the by-product hydrogen storage device 50 is provided in the first supply branch line branched from the first supply line, the by-product hydrogen is transferred to the first supply branch line without passing through the by-product hydrogen storage device 50. It is also possible to feed the synthesis plant 30 from one feed line. In this case, even when the synthesis plant 30 is in operation, it is possible to perform maintenance on the by-product hydrogen storage device 50 by disconnecting the by-product hydrogen storage device 50 from the first supply line. Thereby, the operating rate of the synthesis plant 30 can be improved.

In some embodiments, for example, the flow rate adjustment device 40 shown in FIGS. 1 to 6 and 9 is configured to control the flow rate of carbon dioxide according to the remaining amount of the by-product hydrogen storage device 50. Good too.

According to this configuration, for example, when the remaining amount of the by-product hydrogen storage device 50 (i.e., the storage amount of by-product hydrogen) is less than the threshold value (for example, 10% of the rated value) indicating a lack of remaining amount, the flow rate of carbon dioxide is reduced. Control to make the flow rate of carbon dioxide smaller than usual, control to make the flow rate of carbon dioxide larger than usual when the remaining amount of by-product hydrogen storage device 50 exceeds a threshold value (for example, 90% of the rated capacity) indicating that the capacity is slightly exceeded, etc. It becomes possible to do this. Therefore, it is possible to reduce the possibility that the remaining amount of the by-product hydrogen storage device 50 becomes excessively low or excessive.

In some embodiments, as shown, for example, in FIGS. 1 and 2, the composite production system 100 includes a carbon dioxide storage device 60 for storing carbon dioxide, and from the carbon dioxide storage device 60 to the synthesis plant 30. It is configured to be able to supply carbon dioxide to. The carbon dioxide storage device 60 is a device for storing carbon dioxide, and is, for example, a storage tank.

According to this configuration, it becomes possible to stably supply carbon dioxide to the synthesis plant 30. For example, even if the amount of by-product hydrogen discharged from the by-product hydrogen discharge plant 10 fluctuates to the extent that it deviates from the range that corresponds to the adjustable range of the amount of carbon dioxide recovered, the carbon dioxide storage device 60 cannot be used. Accordingly, carbon dioxide can be supplied to the synthesis plant 30 in an amount close to the amount of carbon dioxide corresponding to the amount of by-product hydrogen. Thereby, the operating rate of the synthesis plant 30 can be improved.

In some embodiments, for example, as shown in FIG. A second supply line may be provided, and the carbon dioxide storage device 60 may be provided in a second supply branch line branched from the second supply line. In addition, in FIG. 2, the supply route from the carbon dioxide storage device 60 to the synthesis plant 30 is another supply line provided in parallel with the second supply line. However, the supply route from the carbon dioxide storage device 60 to the synthesis plant 30 may be a second supply line. That is, the carbon dioxide storage device 60 may be configured to supply carbon dioxide to or from the second supply line.

According to this configuration, since the carbon dioxide storage device 60 is provided in the second supply branch line branched from the second supply line, carbon dioxide can be synthesized from the second supply line without going through the carbon dioxide storage device 60. It can also be supplied to the plant 30. In this case, even when the synthesis plant 30 is in operation, it is possible to perform maintenance on the carbon dioxide storage device 60 by disconnecting the carbon dioxide storage device 60 from the second supply line. Thereby, the operation rate of the synthesis plant can be improved.

The flow rate adjustment device 40 shown in FIGS. 1 and 2 recovers carbon dioxide from the carbon dioxide-containing gas discharged from the carbon dioxide emission plant 20 and supplies carbon dioxide to the carbon dioxide storage device 60 and the synthesis plant 30. It includes a carbon recovery device 42 and a recovery amount adjustment section 41 configured to control the amount of carbon dioxide recovered by the carbon dioxide recovery device 42 . In some embodiments, in such a configuration, the flow rate adjustment device 40 may be configured to control the amount of carbon dioxide recovered according to the remaining amount of the carbon dioxide storage device 60. The flow rate adjustment device 40 also includes a sensor (not shown) that measures the remaining amount of the carbon dioxide storage device 60, the amount of carbon dioxide supplied to the carbon dioxide storage device 60, and the amount of carbon dioxide supplied from the carbon dioxide storage device 60. It may also include a sensor (not shown) that measures the .

According to this configuration, for example, when the remaining amount of the carbon dioxide storage device 60 (i.e., the amount of stored carbon dioxide) falls below a threshold value indicating a lack of remaining amount (for example, 10% of the rated value), the amount of carbon dioxide recovered is set to normal. , control to increase the amount of carbon dioxide recovered than usual when the remaining amount of the carbon dioxide storage device 60 exceeds a threshold value (for example, 90% of the rated value) indicating that the remaining amount of the carbon dioxide storage device 60 is slightly over capacity, etc. It becomes possible to do so. Therefore, it is possible to reduce the possibility that the remaining amount of the carbon dioxide storage device 60 becomes excessively low or excessive.

In some embodiments, the by-product hydrogen discharge plant 10 is a plant that produces caustic soda, such as the by-product hydrogen discharge plant 10 (10A) shown in FIGS. It may be configured to generate by-product hydrogen in salt electrolysis for generation.

The carbon dioxide and hydrogen supplied to the synthesis plant 30 need to be highly purified. If the by-product hydrogen contains impurities, for example, the reaction rate or reaction rate during production of the composite may decrease, which may impede production of the composite. In this regard, according to the above configuration, the by-product hydrogen discharge plant 10 (10A) discharges high-purity by-product hydrogen, so it is possible to reduce the cost required for hydrogen purification processing.

In some embodiments, for example, as shown in FIGS. 3, 4, 7, and 8, at least a portion of the power generated by the carbon dioxide emission plant 20 is supplied to the byproduct hydrogen emission plant 10 or the synthesis plant 30. are doing. In the example shown in FIG. 4, the carbon dioxide emitting plant 20 is a cement factory 20 (20B), and at least a part of the power generated by the power generation device 90 that uses the exhaust heat of the cement factory 20 (20B) is generated from by-product hydrogen. It may be fed to a discharge plant 10 or a synthesis plant 30. In the examples shown in FIGS. 3, 7, and 8, the carbon dioxide emission plant 20 is a coal-fired power plant 20 (20A), and at least a part of the generated power is supplied to the byproduct hydrogen emission plant 10 or the synthesis plant 30. be done.

According to this configuration, by supplying at least a portion of the power generated by the carbon dioxide emission plant 20 to the by-product hydrogen emission plant 10 or the synthesis plant 30, it is possible to improve the efficiency of energy use.

In some embodiments, the composite production system 100 is configured to supply waste heat of the carbon dioxide emitting plant 20 to the synthesis plant 30, such as, for example, the composite production system 100 (100I) shown in FIG. may have been done.

According to this configuration, the synthesis plant 30 utilizes the exhaust heat of the carbon dioxide emission plant 20, thereby making it possible to improve the efficiency of energy use.

Here, an example of the configuration of the synthesis plant 30 will be explained. FIG. 10 is a diagram schematically showing the configuration of a synthesis plant 30 according to an embodiment. As shown in FIG. 10, the synthesis plant 30 includes a hydrogen purification section 31 for refining hydrogen and a carbon dioxide purification section 32 for refining carbon dioxide. Note that these configurations are unnecessary when high-purity by-product hydrogen and carbon dioxide are supplied. The synthesis plant 30 also includes a heating unit 33 for heating a gas mixture of hydrogen and carbon dioxide, a catalyst 34 for chemically reacting hydrogen and carbon dioxide to produce a composite (methanol), and a distillation and a distillation section 36 configured to perform the following. Furthermore, the synthesis plant 30 includes a cooling section 35, a flash tank 37, and a compressor 38 for circulating gas that did not contribute to the production of the synthetic product.

Hydrogen and carbon dioxide supplied from the hydrogen purification section 31 and the carbon dioxide purification section 32 are heated in a mixed state by the heating section 33 and guided to the catalyst 34 . In the catalyst 34, the mixed gas of hydrogen and carbon dioxide undergoes a chemical reaction. This produces a composite. The generated compound is separated into water and a final product (high-purity methanol) by distillation in the distillation section 36. In such a synthesis plant 30, heating is required in the heating section 33 and distillation section 36.

Therefore, in some embodiments, the exhaust heat of the carbon dioxide emission plant 20 in the composite production system 100 (100I) shown in FIG. In other words, it may be used for heating by the heating section 33 before being led to the catalyst 34).

According to this configuration, since the synthesis plant 30 uses the exhaust heat of the carbon dioxide emission plant 20 for heating for reacting carbon dioxide and by-product hydrogen in the synthesis plant 30, it is possible to improve the efficiency of energy use. can.

In some embodiments, the exhaust heat of the carbon dioxide emitting plant 20 in the composite production system 100 (100I) shown in FIG. (Heating necessary for distillation in the distillation section 36).

According to this configuration, since the synthesis plant 30 uses the exhaust heat of the carbon dioxide emission plant 20 for heating for refining the final product from the composite, it is possible to improve the efficiency of energy use.

In some embodiments, for example, as shown in FIG. You can leave it there.

According to this configuration, since the by-product hydrogen discharge plant 10 and the carbon dioxide discharge plant 20 share pure water, it is possible to simplify the equipment for supplying pure water.

Here, in the coal-fired power plant 20 (20A), a boiler generates steam and a steam turbine drives a generator. Pure water is used as water supply to this boiler. The coal-fired power plant 20 (20A) is equipped with a pure water supply line (not shown) to supply water used in the boiler. In the cement factory 20 (20B), steam is generated using waste heat generated in the cement manufacturing process, and a steam turbine drives a power generation device 90 to use electric power within the factory. Therefore, the cement factory 20 (20B) is equipped with a pure water supply line that supplies pure water for generating steam to the steam turbine. In this way, the carbon dioxide emitting plant 20 (for example, the coal-fired power plant 20 (20A), the cement factory 20 (20B)) may be equipped with a pure water supply line.

Therefore, in some embodiments, the composite production system 100 may include a pure water supply device 91, as in the composite production system 100 (100F) shown in FIG. 6, for example. The pure water supply device 91 is configured to remove impurities from raw water to produce pure water, and is configured to supply pure water to the by-product hydrogen discharge plant 10 and the carbon dioxide discharge plant 20.

In such a configuration, the synthetic product production system 100, the by-product hydrogen discharge plant 10, and the carbon dioxide discharge plant 20 share the pure water supply device 91, so that the equipment for supplying pure water can be simplified. can.

In some embodiments, the carbon dioxide emission plant 20 (20C) is produced by reforming naphtha, such as, for example, the composite production system 100 (100J, 100K, 100L, 100M) shown in FIGS. 11-14. It may be configured to exhaust carbon dioxide-containing gas. The carbon dioxide emission plant 20 (20C) includes a reforming device 94 for reforming naphtha, a PSA device 95 for separating hydrogen from naphtha after reforming by the PSA method, and a PSA off-gas of the PSA device 95. It is equipped with a three-way valve 96 for dividing the flow into a heating furnace 97 and a flow rate adjustment device 40 (40B), and a heating furnace 97 for producing oil. Note that the hydrogen separated by the PSA device 95 is not used for synthesis, but is provided as a product to a hydrogen station or the like. The by-product hydrogen discharge plant 10 (10C) is a hydrogen generation device that converts hydrogen-containing gas (carbon dioxide lean gas) obtained from the carbon dioxide-containing gas (carbon dioxide-rich gas) discharged by the carbon dioxide discharge plant 20 (20C). On the other hand, it is configured to discharge by-product hydrogen obtained by hydrogen purification.

According to this configuration, it can be applied to oil refineries. In addition, in FIGS. 11 to 14, numerical values that are not symbols indicate the ratio of the gas amount of each flow path to the PSA off-gas amount discharged from the PSA device 95, which is taken as 100%. . The composition of the PSA off-gas is, for example, 50% by volume of carbon dioxide, 40% by volume of hydrogen, and 10% by volume of methane.

In some embodiments, for example, as shown in FIG. 11, the composite production system 100 includes a carbon dioxide capture device 42 that recovers carbon dioxide from carbon dioxide-containing gases discharged from a carbon dioxide emission plant 20 (20C). The by-product hydrogen discharge plant 10 (10C) may be configured to perform hydrogen purification on the hydrogen-containing gas after the carbon dioxide recovery device 42 has recovered carbon dioxide.

In such a configuration, the by-product hydrogen discharge plant 10 (10C) performs hydrogen purification on the hydrogen-containing gas (carbon dioxide lean gas) after recovering carbon dioxide, so that by-product hydrogen can be efficiently acquired. I can do it. In addition, since the volume processed by the by-product hydrogen discharge plant 10 (10C) is smaller than when processing carbon dioxide-containing gas (carbon dioxide-rich gas), the by-product hydrogen discharge plant 10 (10C) can be made smaller (smaller). Capacity) possible.

In some embodiments, for example, as shown in FIG. 12, the composite production system 100 includes a carbon dioxide recovery device 42 that recovers carbon dioxide from carbon dioxide-containing gases discharged from a carbon dioxide emission plant 20 (20C). The by-product hydrogen discharge plant 10 (10C) may include a hydrogen purification device provided on a flow path through which carbon dioxide-containing gas flows from the carbon dioxide discharge plant 20 (20C) to the carbon dioxide recovery device 42. good.

In such a configuration, the carbon dioxide recovery device 42 recovers carbon dioxide from the carbon dioxide-containing gas (hydrogen lean gas) after hydrogen purification by the by-product hydrogen discharge plant 10 (10C). Can be easily recovered. Furthermore, compared to the case where carbon dioxide is recovered from carbon dioxide-containing gas (hydrogen-rich gas) before hydrogen purification, the volume processed by the carbon dioxide recovery device 42 is smaller, so the carbon dioxide recovery device 42 can be made smaller ( (smaller capacity) possible.

In some embodiments, for example, as shown in FIGS. 11 and 12, the flow regulator 40 (40A) controls the amount of by-products supplied to the synthesis plant 30 by controlling the recovery rate of the carbon dioxide recovery device 42. It is configured to introduce carbon dioxide whose flow rate is adjusted with respect to the flow rate of raw hydrogen to the synthesis plant 30.

In such a configuration, for example, if the carbon dioxide recovery rate is controlled based on the amount of carbon dioxide required when producing a composite with a hydrogen recovery rate of 100%, the carbon dioxide emission plant 20 (20C) Even if the composition of the carbon dioxide-containing gas discharged by the system changes, the hydrogen recovery rate can be fixed at 100%.

In some embodiments, as shown, for example, in FIGS. 13 and 14, the composite production system 100 includes a carbon dioxide capture device 42 that recovers carbon dioxide from a carbon dioxide-containing gas and connects to the carbon dioxide recovery device 42. At least one valve 43 is provided for adjusting the flow rate ratio between the main stream line that bypasses the carbon dioxide recovery device 42 and the bypass line that bypasses the carbon dioxide recovery device 42. At least one valve 43 is a three-way valve in the example shown in FIGS. 13 and 14. Note that the valve 43 is not a three-way valve, but may be two valves for adjusting the flow rates of the main line and the bypass line.

Specifically, the synthetic product production system 100 (100L) shown in FIG. 10 (10C) performs hydrogen purification on the carbon dioxide-containing gas after the carbon dioxide recovery device 42 has recovered carbon dioxide and the other carbon dioxide-containing gas separated by the valve 43. In this case, the by-product hydrogen discharge plant 10 performs hydrogen purification on the carbon dioxide-containing gas after the carbon dioxide recovery device 42 has recovered carbon dioxide and the other carbon dioxide-containing gas separated by the valve 43. By-product hydrogen can be efficiently obtained.

In the composite production system 100 (100M) shown in FIG. 14, a by-product hydrogen discharge plant 10 (10C) performs hydrogen purification on carbon dioxide-containing gas discharged from a carbon dioxide discharge plant 20 (20C), and 43 divides the carbon dioxide-containing gas after hydrogen purification by the by-product hydrogen discharge plant 10 (10C) into two parts, and the carbon dioxide recovery device 42 divides the carbon dioxide-containing gas into one part that has been divided by the valve 43. Carbon dioxide is recovered from In this case, the carbon dioxide recovery device 42 efficiently acquires carbon dioxide because it recovers carbon dioxide from one of the carbon dioxide-containing gases separated by the valve 43 after the by-product hydrogen discharge plant 10 performs hydrogen purification. can do.

According to this configuration, by adjusting the flow rate ratio between the main line and the bypass line, it is possible to reduce the volume of carbon dioxide-containing gas that the carbon dioxide recovery device processes. Capacity) possible.

In some embodiments, for example, in FIGS. 13 and 14, the flow rate adjustment device 40 (40B) controls the flow rate of by-product hydrogen supplied to the synthesis plant 30 by controlling the flow rate ratio. It may be configured to introduce the adjusted carbon dioxide to the synthesis plant 30.

According to this configuration, for example, by controlling the flow rate ratio, the carbon dioxide recovery rate and the hydrogen recovery rate can be fixed.

In some embodiments, synthesis plant 30 is configured to produce at least one of methanol, methane, and dimethyl ether as a synthetic product. According to this configuration, it is possible to produce a synthetic product that has better storage stability than hydrogen gas.

Hereinafter, a method for producing a compound according to at least one embodiment of the present invention will be described. FIG. 15 is a flowchart illustrating a method for producing a composite according to an embodiment of the present invention. As shown in FIG. 15, the composite production system 100 discharges by-product hydrogen (step S1). The composite production system 100 discharges carbon dioxide-containing gas (step S2). Note that these steps may be performed simultaneously or with a time difference.

The synthetic product production system 100 extracts a portion of the carbon dioxide emitted in the carbon dioxide emission step, and uses the carbon dioxide in the synthesis with a flow rate adjusted to the flow rate of by-product hydrogen used in the next step S4. (Step S3). The composite production system 100 produces a composite by synthesizing by-product hydrogen and carbon dioxide contained in the carbon dioxide-containing gas (step S4).

According to such a method, a synthetic product is produced using the carbon dioxide-containing gas discharged in the carbon dioxide discharge step (step S1) and the by-product hydrogen discharged in the by-product hydrogen discharge step (step S2). Produce. In this case, since the cost of obtaining hydrogen is low, the production cost of the composite can be lowered. Furthermore, in the flow rate adjustment step (step S3), carbon dioxide whose flow rate is adjusted relative to the flow rate of by-product hydrogen used in the synthetic product production step (step S4) is introduced into the synthesis. In this case, since the amount of carbon dioxide supplied is adjusted according to the amount of by-product hydrogen supplied, it is possible to increase the utilization rate of hydrogen.

The present invention is not limited to the embodiments described above, and also includes forms in which modifications are added to the embodiments described above, and forms in which these forms are appropriately combined.

10 By-product hydrogen discharge plant 20 Carbon dioxide discharge plant 20A Coal-fired power plant 20B Cement factory 30 Synthesis plant 31 Hydrogen purification section 32 Carbon dioxide purification section 33 Heating section 34 Catalyst 35 Cooling section 36 Distillation section 37 Flash tank 38 Compressor 40 Flow rate Adjustment device 41 Recovery amount adjustment section 42 Carbon dioxide recovery device 43 Valve 50 By-product hydrogen storage device 60 Carbon dioxide storage device 90 Power generation device 91 Pure water supply device 94 Reforming device 95 PSA device 96 Three-way valve 97 Heating furnace 100 Synthetic product production system

Claims (22)

a by-product hydrogen discharge plant that discharges by-product hydrogen;
a carbon dioxide emission plant that discharges carbon dioxide-containing gas;
a synthesis plant that produces a composite by synthesizing the by-product hydrogen and carbon dioxide contained in the carbon dioxide-containing gas;
a flow rate adjustment device configured to guide the carbon dioxide, the flow rate of which is adjusted with respect to the flow rate of the by-product hydrogen supplied to the synthesis plant, to the synthesis plant;
Equipped with
The flow rate adjustment device is
a carbon dioxide recovery device that recovers the carbon dioxide from the carbon dioxide-containing gas discharged from the carbon dioxide emission plant;
The recovery rate of the carbon dioxide from the carbon dioxide-containing gas in the carbon dioxide recovery device or the carbon dioxide is adjusted such that the carbon dioxide is recovered in an amount corresponding to the amount of by-product hydrogen supplied to the synthesis plant. A recovery amount adjustment unit configured to control the amount of carbon dioxide recovered by the carbon dioxide recovery device according to the flow rate of the by-product hydrogen by adjusting the amount of the carbon dioxide-containing gas guided to the recovery device. and,
including;
The flow rate adjustment device is configured to adjust the flow rate of the carbon dioxide led to the synthesis plant by controlling the recovery amount of the carbon dioxide in the recovery amount adjustment section.
Composite production system. comprising a by-product hydrogen storage device for accumulating the by-product hydrogen discharged from the by-product hydrogen discharge plant,
The composite production system according to claim 1, wherein the by-product hydrogen storage device is configured to be able to supply the by-product hydrogen to the synthesis plant. comprising a first supply line for supplying the by-product hydrogen discharged from the by-product hydrogen discharge plant to the synthesis plant,
The compound production system according to claim 2, wherein the by-product hydrogen storage device is provided in a first supply branch line branched from the first supply line. The composite production system according to claim 2 or 3, wherein the flow rate adjustment device is configured to control the flow rate of the carbon dioxide depending on the remaining amount of the by-product hydrogen storage device. comprising a carbon dioxide storage device for storing the carbon dioxide,
The composite production system according to any one of claims 1 to 4, which is configured to be able to supply the carbon dioxide from the carbon dioxide storage device to the synthesis plant. comprising a second supply line for supplying the carbon dioxide contained in the carbon dioxide-containing gas discharged from the carbon dioxide emission plant to the synthesis plant;
The compound production system according to claim 5, wherein the carbon dioxide storage device is provided in a second supply branch line branched from the second supply line. The flow rate adjustment device is
a carbon dioxide recovery device that recovers the carbon dioxide from the carbon dioxide-containing gas discharged from the carbon dioxide emission plant and supplies the carbon dioxide to the carbon dioxide storage device and the synthesis plant;
a recovery amount adjustment unit configured to control the amount of carbon dioxide recovered by the carbon dioxide recovery device;
including;
The composite production system according to claim 5 or 6, wherein the flow rate adjustment device is configured to control the recovery amount of the carbon dioxide recovery device according to the remaining amount of the carbon dioxide storage device. The composite production system according to any one of claims 1 to 7, wherein the by-product hydrogen discharge plant is a plant that produces caustic soda, and the by-product hydrogen is produced in salt electrolysis for producing the caustic soda. . The composite production system according to any one of claims 1 to 8, wherein at least a part of the power generated by the carbon dioxide emission plant is supplied to the by-product hydrogen emission plant or the synthesis plant. The composite production system according to any one of claims 1 to 9, wherein exhaust heat from the carbon dioxide emitting plant is supplied to the synthesis plant. The composite production system according to any one of claims 1 to 10, wherein exhaust heat from the carbon dioxide emission plant is used for heating for reacting the carbon dioxide and the by-product hydrogen in the synthesis plant. . 11. A composite production system according to any one of claims 1 to 10, wherein the waste heat of the carbon dioxide emitting plant is used in heating for purifying the final product from the composite of the synthesis plant. 13. The composite production system according to claim 1, wherein the by-product hydrogen discharge plant produces caustic soda using pure water supplied from the carbon dioxide discharge plant. Any one of claims 1 to 13, further comprising a pure water supply device configured to remove impurities from raw water to produce pure water, and supplying the pure water to the by-product hydrogen discharge plant and the carbon dioxide discharge plant. The compound production system according to item 1. The carbon dioxide emitting plant discharges the carbon dioxide-containing gas obtained by reforming naphtha,
8. The by-product hydrogen discharge plant discharges by-product hydrogen obtained by performing hydrogen purification on the hydrogen-containing gas obtained from the carbon dioxide-containing gas discharged by the carbon dioxide discharge plant. The compound production system according to any one of the items. comprising a carbon dioxide recovery device that recovers the carbon dioxide from the carbon dioxide-containing gas discharged from the carbon dioxide emission plant;
16. The composite production system according to claim 15, wherein the by-product hydrogen discharge plant performs hydrogen purification on the hydrogen-containing gas after the carbon dioxide recovery device has recovered the carbon dioxide. comprising a carbon dioxide recovery device that recovers the carbon dioxide from the carbon dioxide-containing gas discharged from the carbon dioxide emission plant;
16. The composite production system according to claim 15, wherein the by-product hydrogen discharge plant includes a hydrogen purification device provided on a flow path through which the carbon dioxide-containing gas flows from the carbon dioxide discharge plant to the carbon dioxide recovery device. The flow rate adjustment device controls the recovery rate of the carbon dioxide recovery device to guide the carbon dioxide to the synthesis plant, the flow rate of which has been adjusted relative to the flow rate of the by-product hydrogen supplied to the synthesis plant. The compound production system according to claim 16 or 17, configured as follows. a carbon dioxide recovery device that recovers the carbon dioxide from the carbon dioxide-containing gas;
at least one valve for adjusting a flow rate ratio between a main stream line connected to the carbon dioxide recovery device and a bypass line that bypasses the carbon dioxide recovery device;
The compound production system according to claim 15, comprising: The flow rate adjustment device is configured to guide the carbon dioxide to the synthesis plant, the flow rate of which has been adjusted relative to the flow rate of the by-product hydrogen supplied to the synthesis plant, by controlling the flow rate ratio. 20. The compound production system according to claim 19. The synthetic product production system according to any one of claims 1 to 20, wherein the synthesis plant produces at least one of methanol, methane, and dimethyl ether as the synthetic product. a by-product hydrogen discharge step for discharging by-product hydrogen;
a carbon dioxide evacuation step for emitting carbon dioxide-containing gas;
a synthetic product production step of producing a synthetic product by synthesizing the by-product hydrogen and carbon dioxide contained in the carbon dioxide-containing gas;
A portion of carbon dioxide is extracted from the carbon dioxide-containing gas discharged in the carbon dioxide discharging step, and the carbon dioxide flow rate is adjusted with respect to the flow rate of the by-product hydrogen used in the composite product production step. a flow rate adjustment step that leads to synthesis;
Equipped with
The flow rate adjustment step includes:
a carbon dioxide recovery step of recovering the carbon dioxide from the carbon dioxide-containing gas using a carbon dioxide recovery device ;
The recovery rate of the carbon dioxide from the carbon dioxide-containing gas in the carbon dioxide recovery device or the carbon dioxide is adjusted so that the carbon dioxide is recovered in an amount corresponding to the amount of by-product hydrogen used for producing the composite. a recovery amount adjusting step of controlling the amount of carbon dioxide recovered according to the flow rate of the by-product hydrogen by adjusting the amount of the carbon dioxide-containing gas led to the carbon recovery device ;
including;
In the flow rate adjustment step, the flow rate of the carbon dioxide led to the synthesis plant is adjusted by controlling the recovery amount of the carbon dioxide in the recovery amount adjustment step.
Composite production methods.

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