KR101379377B1 - The co2 conversion system intergrating oxyfuel combustion, catalytic reforming and coelectrolysis - Google Patents

Abstract

The present invention relates to a carbon dioxide conversion system, and more specifically, to an integrated type carbon dioxide conversion system combining connecting electrolytic purification and catalystic conversion processes using pure oxygen combustion and new regeneration energy. The carbon dioxide conversion system comprises the following: an ion transfer membrane (ITM) separating oxygen from air; a pure oxygen combustion device that conducts combustion using the oxygen separated by the ITM as an oxidizer; a reformer converting high concentration carbon dioxide generated from the pure oxygen combustion reaction into synthetic gas (CO, H2); an electrolytic purification device applying heat and electric energy for converting the carbon dioxide and steam into synthetic gas and oxygen; and a synthesizing device converting the synthetic gas into methanol, ketone, or carbonate. [Reference numerals] (AA) Operating temperature : 700°C; (BB,DD) Operating pressure : 1 bar; (CC) Operating temperature : 850°C; (EE) Regeneration energy, late-night electric energy

Description

Convergence type CO2 conversion system linking the electrolysis and catalytic conversion process using pure oxygen combustion and renewable energy {THE CO2 CONVERSION SYSTEM INTERGRATING OXYFUEL COMBUSTION, CATALYTIC REFORMING AND COELECTROLYSIS}

The present invention relates to a carbon dioxide conversion system, and more particularly, ITM (Ion Transfer Membrane) that separates oxygen from the air, a oxygen burner for combustion using oxygen separated from the ITM as an oxidant, and produced through a oxygen combustion reaction. A reformer converts the high concentration of carbon dioxide into syngas (CO, H ₂ ), an electrolytic reactor that converts carbon dioxide and water into syngas and oxygen by applying heat and electric energy, and syngas into methanol, ketone, or carbonate. The present invention relates to a fusion type carbon dioxide conversion system that combines pure oxygen combustion composed of a converting synthesizer and an electrolysis and catalytic conversion process using renewable energy.

Oxygen combustion technology uses pure air that removes about 79% of nitrogen in air from existing air combustion system that is injected into a combustor without removing nitrogen and other components in the air. It is a pure oxygen combustion technology that facilitates the capture of carbon dioxide. In the technology of recovering carbon dioxide by adopting pure oxygen combustion, the oxidant is burned by using high-concentration oxygen of 95% or more in purity instead of air to generate heat. Most of the exhaust gas generated through pure oxygen combustion is composed of carbon dioxide and water vapor, and about 70-80% of the generated exhaust gas is recirculated back to the combustion chamber to finally concentrate the carbon dioxide concentration of exhaust gas to 80% or more . When condensing water vapor among the main components of the exhaust gas discharged, it is possible to recover substantially the entire amount of carbon dioxide and store the recovered carbon dioxide, thereby realizing no emission of carbon dioxide and air pollutants.

The carbon dioxide conversion system is a system for capturing a high concentration of carbon dioxide as mentioned above. However, in order to perform pure oxygen combustion, a high concentration of oxygen is required. In this case, separation of oxygen in the air by using an air separation unit (ASU) consumes a lot of energy and lowers the overall system efficiency.

In addition, in the conventional system, there is a problem that the utility value of the carbon dioxide absorbed by the high concentration carbon dioxide collected through the pure oxygen combustion is collected and transported and stored.

In addition, since the conventional oxy-fuel combustor uses oxygen as an oxidizing agent, it has a higher single flame temperature than air, which causes damages to the outer wall of the combustor, so steam is introduced to reduce the combustion temperature. In this case, there is a problem that not only a heat source for generating water vapor but also a separate pump work for driving steam is consumed.

The present invention has been proposed to solve the above problems, ITM for separating the oxygen in the air, oxy-fuel burner for combustion by using the oxygen separated from the ITM as an oxidant, high concentration carbon dioxide produced through the pure oxygen combustion reaction Oxygen combustion consisting of a reformer that converts gas into syngas (CO, H ₂ ), an electrolyzer that converts carbon dioxide and water into syngas by applying heat and electric energy, and a synthesizer that converts syngas into methanol. It is to provide a fusion type carbon dioxide conversion system linked to the electrolytic and catalytic conversion process using and renewable energy.

It also provides a carbon dioxide conversion system that converts captured carbon dioxide into new fuels and useful compounds.

In addition, by providing an integrated reactor incorporating a reformer on the outer wall of the oxy-fuel burner to provide a carbon dioxide conversion system that can increase the lifetime of the oxy-fuel burner and improve the conversion rate of the reforming reaction.

According to an aspect of the present invention, there is provided an ion conductive membrane for separating oxygen in air. A pure oxygen combustor for burning oxygen separated from the ion conductive membrane as an oxidant; A dry reformer for converting carbon dioxide generated from the pure oxygen combustion reaction of the pure oxygen combustion unit and methane gas supplied from the outside into carbon monoxide and hydrogen by dry reforming; It provides a carbon dioxide conversion system comprising; an electrolytic reactor for converting carbon dioxide and water vapor generated through the pure oxygen combustion reaction of the pure oxygen combustion device to carbon monoxide, hydrogen, and oxygen by applying heat and electric energy.

In addition, the dry-former or the synthesizer for converting carbon monoxide and hydrogen generated in the electrolyzer to methanol, ketone or carbonate and the like; characterized in that it further comprises.

The apparatus may further include a mixer for mixing oxygen generated in the electrolyzer and oxygen separated from the ion conductive membrane, and supplying oxygen from the mixer to the pure oxygen combustion device.

In addition, the present invention is an ion conductive membrane for separating oxygen in the air; A pure oxygen combustor for burning oxygen separated from the ion conductive membrane as an oxidant; Tri-reformer converts carbon dioxide and water vapor generated through pure oxygen combustion reaction of the pure oxygen combustion group, methane gas supplied from the outside, and oxygen separated from the ion conductive membrane into carbon monoxide and hydrogen by triple reforming reaction. Reformer); It provides a carbon dioxide conversion system comprising; an electrolytic reactor for converting carbon dioxide and water vapor generated through the pure oxygen combustion reaction of the pure oxygen combustion device to carbon monoxide, hydrogen, and oxygen by applying heat and electric energy.

In addition, the tri-reformer or a synthesizer for converting carbon monoxide and hydrogen generated in the co-electrolyzer to methanol, ketone or carbonate and the like; characterized in that it further comprises.

In addition, a mixer for mixing the oxygen generated in the electrolyzer and the oxygen separated in the ion conductive membrane; And a three-way valve for supplying oxygen to the oxy-fuel burner or the tri-reformer in the mixer.

Also, the turbine is rotated by using the exhaust gas discharged from the oxy-fuel combustor, and electricity is generated through the generator connected to the turbine.

In addition, the first heat exchanger may be installed at a rear end of the oxy-fuel combustor to increase the temperature of the circulated flow.

In addition, steam is separated from the exhaust gas passing through the turbine and supplied to the oxy-fuel combustor.

Also, it is characterized in that water vapor is separated from the exhaust gas discharged from the oxy-fuel combustor and supplied to the tri-reformer and the oxy-fuel combustor.

In addition, a three-way valve for controlling the flow rate of steam supplied to the tri-reformer and the oxy-fuel combustor is further provided.

In addition, the present invention is an ion conductive membrane for separating oxygen in the air; An integrated reactor in which a dry-reformer is disposed on an outer wall of the oxy-fuel burner; And an electrolytic reactor for converting carbon dioxide and water vapor generated through the pure oxygen combustion reaction of the pure oxygen burner into carbon monoxide, hydrogen, and oxygen by applying heat and electric energy, and in the pure oxygen burner of the integrated reactor, the ion conductivity. Combustion reaction takes place using oxygen separated from the membrane as an oxidant, and dry reformer of the integrated reactor reacts with carbon monoxide by dry reforming the carbon dioxide produced through the pure oxygen combustion reaction of the pure oxygen combustion reactor and methane gas supplied from the outside. It provides a carbon dioxide conversion system characterized in that the conversion to and hydrogen.

In addition, the dry-former or the synthesizer for converting carbon monoxide and hydrogen generated in the electrolyzer to methanol, ketone or carbonate and the like; characterized in that it further comprises.

The apparatus may further include a mixer for mixing oxygen generated in the electrolyzer and oxygen separated from the ion conductive membrane, and supplying oxygen from the mixer to the pure oxygen combustion device.

In addition, the present invention is an ion conductive membrane for separating oxygen in the air; An integrated reactor in which a tri-reformer is disposed on an outer wall of the oxy-fuel burner; And an electrolytic reactor for converting carbon dioxide and water vapor generated through the pure oxygen combustion reaction of the pure oxygen burner into carbon monoxide, hydrogen, and oxygen by applying heat and electric energy, and in the pure oxygen burner of the integrated reactor, the ion conductivity. Combustion reaction occurs using oxygen separated from the membrane as an oxidant, and in the tri-reformer of the integrated reactor, carbon dioxide and water vapor generated through the pure oxygen combustion reaction of the pure oxygen burner, methane gas supplied from the outside, and the ion conductivity It provides a carbon dioxide conversion system characterized in that the oxygen separated from the membrane is converted to carbon monoxide and hydrogen by triple reforming reaction.

In addition, the tri-reformer or a synthesizer for converting carbon monoxide and hydrogen generated in the co-electrolyzer to methanol, ketone or carbonate and the like; characterized in that it further comprises.

In addition, a mixer for mixing the oxygen generated in the electrolyzer and the oxygen separated in the ion conductive membrane; And a three-way valve for supplying oxygen to the oxy-fuel burner or the tri-reformer in the mixer.

Also, the turbine is rotated by using the exhaust gas discharged from the oxy-fuel combustor, and electricity is generated through the generator connected to the turbine.

In addition, it is further provided with a three-way valve for separating steam from the exhaust gas discharged from the oxy-fuel combustor and supplying the steam to the oxy-fuel combustor, and for controlling the flow rate of the steam.

Also, it is characterized in that water vapor is separated from the exhaust gas discharged from the oxy-fuel combustor and supplied to the tri-reformer and the oxy-fuel combustor.

In addition, a three-way valve for controlling the flow rate of steam supplied to the tri-reformer and the oxy-fuel combustor is further provided.

According to the carbon dioxide conversion system according to the present invention, oxygen production cost is reduced as compared with an ASU for separating oxygen in the air using ITM in terms of oxygen production, thereby improving system efficiency.

The synthesis gas converted from the reformer can be converted and synthesized into a new fuel or a useful compound material such as methanol, ketone, carbonate, etc. through an additional process, so that it can be used for various purposes.

In the carbon dioxide conversion system according to the present invention, the tri-reformer or the dry-reformer is integrally formed on the outer wall of the oxy-fuel combustor, so that the heat lost on the outer wall of the oxy-fuel combustor can be transferred to the tri- It is possible to reduce the amount of water vapor to be consumed or reduce the energy consumption for generating and driving steam.

In addition, it is also possible to improve the syngas conversion rate by improving the heat transfer rate supplied to the tri- or dry-former.

In addition, by using the surplus power and thermal energy from the late-night power or renewable energy to convert and synthesize the synthesis gas into a new fuel or a useful compound material has the advantage that it can be used for various purposes.

1 is a schematic view of a conventional oxy-fuel combustion system using an ASU.
2 to 5 are schematic diagrams of a fusion type carbon dioxide conversion system incorporating electrolytic and catalytic conversion processes using pure oxygen combustion and renewable energy according to the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail preferred embodiments of the fusion type carbon dioxide conversion system in conjunction with the electrolytic combustion and catalytic conversion process using pure oxygen combustion and renewable energy according to the present invention. In the drawings, the same reference numerals are used to designate the same or similar components throughout the drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

FIG. 1 shows a pure oxyfuel combustion system using a conventional ASU. The system includes a pure oxygen combustor 1, an ASU 2, a turbine 3, a heat exchanger 4, a heater 5, a blower 6, and a generator 7.

In the pure oxygen combustor (1), the combustion reaction occurs using the separated oxygen as the oxidizing agent, and the exhaust gas discharged from the pure oxygen combustor (1) becomes the main components of carbon dioxide and water vapor. The exhaust gas is used to drive the turbine 3 and the generator 7 connected to the same axis as the turbine 3 produces electricity.

The exhaust gas that has passed through the turbine 3 is separated into carbon dioxide and water vapor by the heater 5, and the separated water vapor is sent to the heat exchanger 4 by the blower 7. The high-temperature steam passing through the heat exchanger (4) is recycled back to the oxy-fuel combustor (1).

The conventional system uses an ASU (2) that separates oxygen from the incoming air. Energy is consumed in the process of separating oxygen, which lowers overall system efficiency.

In addition, there is a problem of supplying water vapor to the oxy-fuel combustor 1 due to the high single flame temperature by using oxygen as the oxidant instead of air in the oxy-combustion reaction, and the durability of the oxy-fuel combustor 1 is inferior.

2 shows a system configuration diagram of the first embodiment according to the present invention.

Example 1

Example 1 is largely, ITM 20 for separating oxygen from air, oxy-fuel burner 10 for burning using oxygen separated from ITM 20 as an oxidant, and high concentration of carbon dioxide produced through pure oxygen combustion reaction Dry reformer (15) to convert the gas into syngas (CO, H ₂ ), an electrolyzer (60) converting carbon dioxide and water into syngas and oxygen by applying heat and electric energy, and syngas to methanol It consists of a synthesizer 50 and the like to convert.

The reaction temperature of oxygen separation in the ITM 20 is about 850 ° C., the operating pressure is about 1 bar, and the temperature of the supplied air is increased by passing through a separate heat exchanger or the heater 21 is placed outside the ITM 20. You can use the installation method.

The oxy-fuel combustion reaction is carried out in the same manner as in the above formula (1) except that the oxygen separated from the ITM 20 and the natural gas CH ₄ supplied from the outside to the oxy-fuel combustor 10, After becoming the water vapor (H ₂ 0) which is separated from the circulating gas introduced to the combustion reaction is carbon dioxide and water vapor is generated in the exhaust gas.

The discharged exhaust gas drives the turbine 12 through the first heat exchanger 11 and the generator 13 connected to the same axis as the turbine 12 produces electricity. The exhaust gas passing through the turbine 12 branches into the flow from the three-way valve 61 to the second heat exchanger 30 and the flow to the idler 60. First, the exhaust gas flow passing through the second heat exchanger 30 and passing through the second heat exchanger 30 is separated into carbon dioxide and water vapor by the heater 31.

The separated carbon dioxide is heated in the first heat exchanger (11) and supplied to the dry reformer (15). The separated steam is sent to the second heat exchanger 30 by the blower 32 and is heated by the second heat exchanger 30 to be supplied to the oxy-fuel combustor 10. A three-way valve (34) may be provided to regulate the amount of steam supplied to the oxy-fuel combustor (10). And controls the system efficiency by adjusting the amount of water vapor flowing into the oxy-fuel combustor 10 from the three-way valve 34.

Next, the flow to the electrolyzer 60 undergoes a coelectrolysis process in which carbon dioxide and water vapor in the exhaust gas are electrolyzed and converted into syngas and oxygen. Electrolytic process refers to a process that converts into syngas and oxygen by applying heat and electric energy. As described above, the electrolysis process requires heat and electric energy, and thus, surplus power and heat energy from late-night power or renewable energy may be used.

When using late-night power, carbon dioxide is converted only to catalytic chemical processes such as dry reforming or triple reforming during the day. When surplus power is generated at night, the amount of surplus power is used to revolve carbon dioxide and water vapor. It is fed to (60) to produce syngas and oxygen.

Electric power from renewable energy such as wind power and solar power can also be subjected to the electrostatic process in the same way as the method using the midnight power. In this way, if the resonator 60 is used, the discarded electric power can be used, and oxygen is additionally produced in addition to the syngas as a product, thereby reducing the amount of oxygen that must be produced in the ITM 20, and thus, relatively ITM (20). Can also reduce energy consumption.

Oxygen produced in the electrolyzer 60 is mixed with oxygen separated in the ITM 20 in the mixer 62 and supplied to the oxyfuel burner 10.

The dry reformer 15 has an operating temperature of about 700 DEG C and an operating pressure of 1 bar. The carbon dioxide supplied is circulated by separating the carbon dioxide from the exhaust gas discharged from the oxy-fuel combustor 10 as mentioned above, Is heated by the heat exchanger (11) and supplied to the dry reformer (15).

In this embodiment, the dry reforming reaction (Dry-Reforming), such as the formula (2) occurs.

The dry reforming reaction as shown in the above formula (2) is a reaction in which 1 mole of methane and 1 mole of carbon dioxide are fed to produce 2 moles of carbon monoxide and 2 moles of hydrogen after the reforming reaction. The dry-reformer 15 generates carbon monoxide and hydrogen using carbon dioxide generated from natural gas and pure oxygen combustion reaction from the outside.

Carbon monoxide and hydrogen generated in the dry-former (15) or the electrolyzer (60) are converted to new fuels or useful chemicals such as methanol or ketone or carbonate through the synthesizer (50). And synthetic.

The synthesizer 50 may be installed at the rear end of the dry reformer 15 or the resonator 60.

3 shows a system configuration diagram of a second embodiment according to the present invention.

[Example 2]

Example 2 is largely an ITM 20 that separates oxygen in air, a oxy-fuel burner 10 that burns using oxygen separated in the ITM 20 as an oxidant, and a high concentration of carbon dioxide produced through a pure-oxygen combustion reaction. And water vapor, a natural gas supplied from the outside, a tri-reformer (16) which converts oxygen separated from the ITM (20) into a synthesis gas (CO, H ₂ ), and heat and electric energy are added to the carbon dioxide and water vapor. It is composed of a resonator 60 for converting to oxygen, and a synthesizer 50 for converting syngas into methanol.

Unlike Example 1, in Example 2, a tri-reforming reaction is performed. The triple reforming reaction shows a reaction formula as in Equation (3).

Unlike the dry reforming reaction, which feeds only carbon dioxide and natural gas, the triple reforming reaction must additionally introduce oxygen and water vapor.

Therefore, the oxygen separated from the ITM 20 is introduced into the oxy-fuel combustor 10 or the tri-reformer 16 by the three-way valve 35 in order to introduce the oxygen.

In the pure oxy-fuel combustor 10, the exhaust gas is subjected to the oxy-fuel combustion reaction as shown in Equation (1), and the exhaust gas is transferred to the first heat exchanger 11. The exhaust gas that has passed through the first heat exchanger 11 drives the turbine 12 and generates electricity from the generator 13 connected to the turbine 12 coaxially.

The exhaust gas passing through the turbine 12 branches into a flow from the three-way valve 61 to the second heat exchanger 30 and a flow to the resonator 60. First, the exhaust gas flow passing through the second heat exchanger 30 and passing through the second heat exchanger 30 is separated into carbon dioxide and water vapor by the heater 31. The separated water vapor is introduced into the second heat exchanger 30 by the blower 32 and the flow is controlled from the three-way valve 34 to the oxy-fuel combustor 10 or the tree- do.

The flow of the three-way valve 34 in the direction of the tree-reformer 16 is again introduced into the mixer 14 which is mixed with the carbon dioxide separated from the heater 31 to be supplied to the first heat exchanger 11) and then supplied to the tree-reformer 16.

The tree-reformer 16 operates at a temperature and pressure higher than that of the dry-reformer 15 mentioned in Embodiment 1 at an operating temperature of about 800 to 900 ° C and an operating pressure of 5 bar, and the first heat exchanger 11 The steam and carbon dioxide must be warmed up sufficiently before being fed to the tri-reformer 16.

Next, the flow to the electrolyzer 60 undergoes a coelectrolysis process in which carbon dioxide and water vapor in the exhaust gas are electrolyzed and converted into syngas and oxygen.

Oxygen produced in the electrolyzer 60 is mixed with oxygen separated in the ITM 20 in the mixer 62 and fed to the oxy-fuel burner 10 or the tri-reformer 16 by a three-way valve 35. Supplied.

The temperature of the oxygen separated from the ITM 20 can be supplied without substantially passing through the heat exchanger, which corresponds approximately to the reaction temperature of tri-reforming of 850 ° C.

Carbon monoxide and hydrogen generated in the tri-reformer (16) or electrolyzer (60) are converted to new fuels or useful chemicals such as methanol or ketone or carbonate through the synthesizer (50). And synthetic.

4 shows a system configuration diagram of a third embodiment according to the present invention.

[Example 3]

Example 3 largely converts the high concentration of carbon dioxide produced by the pure oxygen combustion reaction on the outer wall of the ITM 20, the pure oxygen burner 10 to separate oxygen in the air to the synthesis gas (CO, H ₂ ) Integrated reactor 40 having a dry reformer 41 disposed therein, a resonator 60 for converting carbon dioxide and water into syngas and oxygen by applying heat and electric energy, and a synthesizer for converting syngas into methanol and the like ( 50).

Since the conventional oxy-fuel combustor uses oxygen as the oxidizer, it causes damage to the outer wall of the combustor due to high single flame temperature. In order to prevent this, the reaction is proceeded by lowering the combustion temperature by introducing water vapor. In this case, not only a heat source for generating water vapor but also a separate pump power for driving water vapor is required, which complicates the system configuration and lowers the overall system efficiency.

Thus, in the third embodiment, the dry reformer 41 is integrated on the outer wall of the cylindrical oxy-fuel combustor 10 to introduce the integrated reactor 40 into the present system. The heat generated in the oxy-fuel combustor 10 is transferred to the dry-reformer 41 to lower the adiabatic flame temperature of the oxy-fuel burner 10, so that the amount of the steam flowing into the oxygen- The power consumption of the heat and the pump for generating steam can be reduced, and the configuration of the system can be simplified.

In the pure oxygen combustor 10, carbon dioxide and water vapor (or oxygen) are exhausted as exhaust gas after the reaction as shown in equation (1). The exhausted exhaust gas drives the turbine 12 and produces electricity in the generator 13 connected to the same axis as the turbine 12. [

The exhaust gas having passed through the turbine 12 is branched into a flow to the idler 60 and a flow to the second heat exchanger 30 by the three-way valve 61. First, the flow to the second heat exchanger 30 passes through the second heat exchanger 30 and is separated into carbon dioxide and water vapor by the heater 31. The separated water vapor is again introduced into the second heat exchanger (30) by the blower (32), heated again, and then circulated to the oxy-fuel combustor (10). The flow rate may be adjusted in the three-way valve 34 before being introduced into the oxy-fuel combustor 10.

The separated carbon dioxide is supplied to the dry reformer 41. The supplied carbon dioxide and the natural gas introduced from the outside generate synthesis gas (carbon monoxide, hydrogen) through the dry reforming reaction of the formula (2).

Next, the flow to the electrolyzer 60 undergoes a coelectrolysis process in which carbon dioxide and water vapor in the exhaust gas are electrolyzed and converted into syngas and oxygen.

Oxygen produced in the electrolyzer 60 is mixed with oxygen separated in the ITM 20 in the mixer 62 and supplied to the oxyfuel burner 10.

Carbon monoxide and hydrogen produced in the dry-reformer (41) or the electrolyzer (60) are converted to new fuels or useful chemicals such as methanol or ketone or carbonate through the synthesizer (50). And synthetic.

The introduction of the integrated reactor 40 incorporating the oxy-fuel burner 10 and the dry-reformer 41 can achieve the effect of a simpler system configuration.

5 shows a system configuration diagram of a fourth embodiment according to the present invention.

Example 4

In Example 4, ITM 20, which separates oxygen in the air, an integrated reactor 40 having a tri-reformer 42 disposed on the outer wall of the oxy-fuel burner 10, and heat and electric energy are added to the carbon dioxide and water vapor. It consists of a resonator 60 for converting the synthesis gas and oxygen, and a synthesizer 50 for converting the synthesis gas into methanol and the like.

The oxygen separated from the ITM 20 is supplied to the oxy-fuel combustor 10 or the tree-reformer 42 by the three-way valve 22. Oxygen separated from the ITM 20 is oxidized in the oxy-fuel combustor 10, and carbon dioxide and water vapor (or oxygen) are exhausted as exhaust gas.

The exhaust gas may drive the turbine 12 and produce electricity by the generator 13 coaxial with the turbine 12.

The exhaust gas passing through the turbine 12 branches into a flow from the three-way valve 61 to the second heat exchanger 30 and a flow to the resonator 60. First, the exhaust gas flow passing through the second heat exchanger 30 and passing through the second heat exchanger 30 is separated into carbon dioxide and water vapor by the heater 31.

The separated carbon dioxide is fed to the tri-reformer 42 to effect the triple reforming reaction shown in equation (3).

The separated water vapor is again introduced into the first heat exchanger 30 by the blower 32 and the water vapor raised in the first heat exchanger 30 flows toward the tri-reformer 42 or the oxy-fuel combustor 10 do. And a three-way valve 34 for regulating the flow may be further provided.

Next, the flow to the electrolyzer 60 undergoes a coelectrolysis process in which carbon dioxide and water vapor in the exhaust gas are electrolyzed and converted into syngas and oxygen.

Oxygen produced in the electrolyzer 60 is mixed with oxygen separated in the ITM 20 in the mixer 62 and fed to the oxy-fuel burner 10 or the tri-reformer 42 by the three-way valve 35. Supplied.

In the tri-reformer 42, a triple reforming reaction takes place. The natural gas supplied from the outside, the carbon dioxide separated from the heater 31, the steam passing through the first heat exchanger, the oxygen separated from the ITM 20, . Unlike the dry reforming reaction shown in Example 3, the triple reforming reaction requires a supply of steam and oxygen additionally to constitute a flow like this system.

Carbon monoxide and hydrogen generated in the tri-reformer 42 or the electrolyzer 60 are converted to a new fuel or useful chemical such as methanol or ketone or carbonate through the synthesizer 50. And synthetic.

The foregoing description is merely illustrative of the technical idea of the present invention and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

1: oxyfuel combustor 2: ASU
3: turbine 4: heat exchanger
5: heater 6: blower
7: generator 10: oxygen burner
11: first heat exchanger 12: turbine
13: Generator 14: Mixer
15: dry-reformer 16: tri-reformer
20: ITM 21: Heater
22: Three-way valve 30: Second heat exchanger
31: heater 32: blower
34: Three-way valve 35: Three-way valve
40: Integrated Reactor 41: Dry-Reformer
42: tree-reformer 50: synthesizer
60: idle break 61: three-way valve
62: mixer

Claims (21)

An ion conductive membrane separating oxygen in the air;
A pure oxygen combustor for burning oxygen separated from the ion conductive membrane as an oxidant;
A dry reformer for converting carbon dioxide generated from the pure oxygen combustion reaction of the pure oxygen combustion unit and methane gas supplied from the outside into carbon monoxide and hydrogen by dry reforming;
A carbon dioxide conversion system comprising: an electrolytic reactor for converting carbon dioxide and water vapor generated through a pure oxygen combustion reaction of the pure oxygen combustion unit into carbon monoxide, hydrogen, and oxygen by applying heat and electric energy. The method according to claim 1,
And a synthesizer for converting carbon monoxide and hydrogen generated in the dry-reformer or the electrolyzer into methanol, ketone, carbonate, or the like. The method according to claim 1,
And a mixer for mixing oxygen generated from the electrolyzer and oxygen separated from the ion conductive membrane, and supplying oxygen from the mixer to the oxy-fuel burner. An ion conductive membrane separating oxygen in the air;
A pure oxygen combustor for burning oxygen separated from the ion conductive membrane as an oxidant;
Tri-reformer converts carbon dioxide and water vapor generated through pure oxygen combustion reaction of the pure oxygen combustion group, methane gas supplied from the outside, and oxygen separated from the ion conductive membrane into carbon monoxide and hydrogen by triple reforming reaction. Reformer);
A carbon dioxide conversion system comprising: an electrolytic reactor for converting carbon dioxide and water vapor generated through a pure oxygen combustion reaction of the pure oxygen combustion unit into carbon monoxide, hydrogen, and oxygen by applying heat and electric energy. 5. The method of claim 4,
And a synthesizer for converting carbon monoxide and hydrogen generated in the tri-reformer or the electrolyzer into methanol, ketone, carbonate, and the like. 5. The method of claim 4,
A mixer for mixing oxygen generated in the electrolyzer and oxygen separated from the ion conductive membrane;
And a three-way valve for supplying oxygen to the oxy-fuel burner or the tri-reformer in the mixer. 7. The method according to any one of claims 1 to 6,
Wherein the turbine is rotated using the exhaust gas discharged from the oxy-fuel combustor, and electricity is generated through a generator connected to the turbine. 7. The method according to any one of claims 1 to 6,
And a first heat exchanger is installed at a rear end of the oxy-fuel combustor to increase the temperature of the circulating flow. The method of claim 7, wherein
And separating steam from the exhaust gas that has passed through the turbine, and supplying the steam to the oxy-fuel combustor. The method according to any one of claims 4 to 6,
Wherein the water vapor is separated from the exhaust gas discharged from the oxy-fuel combustor and supplied to the tri-reformer and the oxy-fuel combustor. 11. The method of claim 10,
Further comprising a three-way valve for controlling a flow rate of the steam supplied to the purifier and the tri-reformer and the steam supplied to the oxy-fuel combustor. An ion conductive membrane separating oxygen in the air;
An integrated reactor in which a dry-reformer is disposed on an outer wall of the oxy-fuel burner;
It includes; and an electrolytic device for converting carbon dioxide and water vapor generated through the pure oxygen combustion reaction of the pure oxygen burner to carbon monoxide, hydrogen, and oxygen by applying heat and electric energy.
In the oxy-fuel combustor of the integrated reactor, the oxygen separated from the ion conductive membrane is used as an oxidant to cause a combustion reaction,
Wherein the dry reformer of the integrated reactor converts dry carbon dioxide generated from the pure oxygen combustion reaction of the pure oxygen combustor and methane gas supplied from the outside into dry carbon monoxide and hydrogen. 13. The method of claim 12,
And a synthesizer for converting carbon monoxide and hydrogen generated in the dry-reformer or the electrolyzer into methanol, ketone, carbonate, and the like. 13. The method of claim 12,
And a mixer for mixing oxygen generated from the electrolyzer and oxygen separated from the ion conductive membrane, and supplying oxygen from the mixer to the oxy-fuel burner. An ion conductive membrane separating oxygen in the air;
An integrated reactor in which a tri-reformer is disposed on an outer wall of the oxy-fuel burner;
It includes; and an electrolytic device for converting carbon dioxide and water vapor generated through the pure oxygen combustion reaction of the pure oxygen burner to carbon monoxide, hydrogen, and oxygen by applying heat and electric energy.
In the oxy-fuel combustor of the integrated reactor, the oxygen separated from the ion conductive membrane is used as an oxidant to cause a combustion reaction,
In the tri-reformer of the integrated reactor, carbon dioxide and water vapor generated through the pure oxygen combustion reaction of the pure oxygen burner, methane gas supplied from the outside, and oxygen separated from the ion conductive membrane are converted into carbon monoxide and hydrogen by triple reforming reaction. Carbon dioxide conversion system characterized in that. The method of claim 15,
And a synthesizer for converting carbon monoxide and hydrogen generated in the tri-reformer or the electrolyzer into methanol, ketone, carbonate and the like. The method of claim 15,
A mixer for mixing oxygen generated in the electrolyzer and oxygen separated from the ion conductive membrane;
And a three-way valve for supplying oxygen to the oxy-fuel burner or the tri-reformer in the mixer. The method according to any one of claims 12 to 17,
Wherein the turbine is rotated using the exhaust gas discharged from the oxy-fuel combustor, and electricity is generated through a generator connected to the turbine. The method according to any one of claims 12 to 14,
Further comprising a three-way valve for separating steam from the exhaust gas discharged from the oxy-fuel combustor, supplying the oxygen to the oxy-fuel combustor, and controlling the flow rate of the steam. 18. The method according to any one of claims 15 to 17,
Wherein the water vapor is separated from the exhaust gas discharged from the oxy-fuel combustor and supplied to the tri-reformer and the oxy-fuel combustor. 21. The method of claim 20,
Further comprising a three-way valve for controlling a flow rate of the steam supplied to the purifier and the tri-reformer and the steam supplied to the oxy-fuel combustor.

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