KR102093169B1 - Propulsion power producing system for ship using carbon dioxide - Google Patents

Abstract

The present invention provides a propulsion power producing system for a ship which reduces carbon dioxide emissions. According to the present invention, the propulsion power producing system for a ship comprises: a heat engine to combust fossil fuel to produce mechanical energy used as propulsion power of a ship and discharge carbon dioxide gas as a byproduct; and a secondary battery to produce electric energy used as propulsion power of the ship. The secondary battery includes: a first aqueous solution accommodated in a first reaction space; a cathode at least partially immersed in the first aqueous solution; an alkaline second aqueous solution accommodated in a second reaction space; an anode at least partially immersed in the second aqueous solution; a connection passage connecting the first reaction space and the second reaction space; and an ion transfer member of a porous structure installed on the connection passage to block a movement of the first and second aqueous solutions and allow a movement of ions. In a discharging process of the secondary battery, carbon dioxide gas discharged from the heat engine flows into the first aqueous solution. Hydrogen ions and bicarbonate ions are produced by a reaction of water of the first aqueous solution and the carbon dioxide gas, and the hydrogen ions and electrons of the cathode are coupled to create hydrogen gas.

Description

Ship's propulsion power production system using carbon dioxide {PROPULSION POWER PRODUCING SYSTEM FOR SHIP USING CARBON DIOXIDE}

The present invention relates to a technology for producing propulsion power of a ship, and more particularly, to a technology for producing propulsion power of a ship by using a heat engine and a battery using fossil fuels together.

With the recent industrialization, greenhouse gas emissions are continuously increasing, and carbon dioxide accounts for the largest share of greenhouse gases. Carbon dioxide emissions by industry type are the largest in energy sources such as power plants, and carbon dioxide generated in the cement / steel / refining industry including power generation accounts for half of the world's emissions. The CO2 conversion / utilization field can be largely divided into chemical conversion, biological conversion, and direct utilization, and the technical categories can be categorized into catalyst, electrochemistry, bioprocess, light utilization, inorganic (carbonation), and polymer. Carbon dioxide is generated in various industries and processes, and since carbon dioxide reduction cannot be achieved with one technology, various approaches to carbon dioxide reduction are required.

Currently, the US Department of Energy's Department of Energy (DOE) is a technology to reduce carbon dioxide, and it is pursuing multilateral technology development with an interest in CCUS technology that combines CCS (Carbon Capture & Storage) and CCU (CC & Utilization). CCUS technology is recognized as an effective GHG reduction method, but it faces the problems of high investment cost, the possibility of releasing harmful capture agents into the atmosphere, and low technology maturity. In addition, from an energy and climate policy perspective, CCUS provides a means to substantially reduce greenhouse gas emissions, but there are many complements to the realization of the technology. Accordingly, there is a need to develop a breakthrough technology for a new concept of capturing, storing, and utilizing carbon dioxide more efficiently.

In the case of ships, since the propulsion power is mainly obtained through diesel engines using low-quality raw materials, such as bunker seed oil, which contains about 3,500 times more sulfur than vehicle diesel oil, there is a problem that conventional ships emit large amounts of carbon dioxide. have. In recent years, regulations that limit ship's carbon dioxide emissions are being prepared.

Republic of Korea Patent Publication No. 10-2014-0112644 (2014.09.24.)

An object of the present invention is to provide a propulsion power production system for ships that reduces the emission of carbon dioxide while using fossil fuels.

Another object of the present invention is to provide a propulsion power production system for ships that produces hydrogen using carbon dioxide discharged from a heat engine that produces power by burning fossil fuels and utilizes it for power generation.

In order to achieve the above object of the present invention, according to an aspect of the present invention, a heat engine for burning fossil fuel to produce mechanical energy used as a propulsion power of a ship and to discharge carbon dioxide gas as a by-product; And a secondary battery for producing electric energy used as a propulsion power of the ship, wherein the secondary battery includes at least a portion of a first aqueous solution accommodated in a first reaction space and the first aqueous solution.

Is a locked cathode, a basic second aqueous solution accommodated in a second reaction space, an anode at least partially submerged in the second aqueous solution, a connecting passage communicating the first reaction space and the second reaction space, and It is installed in the connection passage and has an ion transfer member having a porous structure that blocks movement of the first aqueous solution and the second aqueous solution and allows movement of ions, and discharges the secondary battery from the heat engine as the first aqueous solution. The carbon dioxide gas discharged is introduced, and hydrogen ions and bicarbonate ions are generated by the reaction of water and the carbon dioxide gas in the first aqueous solution, and the hydrogen ions and the electrons of the cathode are combined so that hydrogen gas is generated. A production system is provided.

In order to achieve the above object of the present invention, according to another aspect of the present invention, a heat engine for burning fossil fuel to produce mechanical energy used as a propulsion power of a ship and discharge carbon dioxide gas as a by-product; And a secondary battery for producing electric energy used as a propulsion power of the ship, wherein the secondary battery includes a first potassium hydroxide aqueous solution accommodated in a first reaction space and a cathode at least partially submerged in the first potassium hydroxide aqueous solution. And, a second potassium hydroxide aqueous solution accommodated in the second reaction space, an anode immersed in at least a portion of the second potassium hydroxide aqueous solution, a connection passage connecting the first reaction space and the second reaction space, and the connection. It is installed in the passage and has an ion exchange membrane that blocks the movement of the first aqueous potassium hydroxide solution and the second aqueous potassium hydroxide solution and allows movement of ions, and is used as the first aqueous potassium hydroxide solution in the discharge process of the secondary battery. Carbon dioxide gas discharged from a heat engine flows in, and water of the first potassium hydroxide aqueous solution and the carbon dioxide gas The hydrogen ions and bicarbonate ions are generated by the response, which the hydrogen ions and the cathode of the electron be combined there is provided a marine propulsion power generation system for a hydrogen gas generation.

In order to achieve the above object of the present invention, according to another aspect of the present invention, a heat engine for burning fossil fuel to produce mechanical energy used as a propulsion power of a ship and to discharge carbon dioxide gas as a by-product; And a secondary battery for producing electrical energy used as a propulsion power of the ship, wherein the secondary battery includes a first aqueous solution accommodated in a first reaction space, a cathode at least partially submerged in the first aqueous solution, and a second battery. A basic second aqueous solution accommodated in the reaction space, an anode immersed in at least a portion of the second aqueous solution, and a salt bridge connecting the first aqueous solution and the second aqueous solution, wherein the second battery is discharged during the discharge process of the secondary battery. Carbon dioxide gas discharged from the heat engine flows into the aqueous solution, and hydrogen ions and bicarbonate ions are generated by the reaction of water and the carbon dioxide gas in the first aqueous solution, and the hydrogen ions and electrons of the cathode are combined to form a hydrogen gas. A propulsion power production system for ships is generated.

In order to achieve the above object of the present invention, according to another aspect of the present invention, a heat engine for burning fossil fuel to produce mechanical energy used as a propulsion power of a ship and to discharge carbon dioxide gas as a by-product; And a secondary battery for producing electric energy used as a propulsion power of the ship, wherein the secondary battery includes an aqueous electrolyte accommodated in a reaction space, a cathode at least partially submerged in the reaction space in the reaction space, and the reaction. An anode having at least a portion immersed in the aqueous electrolyte in a space is provided, and carbon dioxide gas discharged from the heat engine flows into the aqueous electrolyte during the discharge process of the secondary battery. Hydrogen ions and bicarbonate ions are generated, and the propulsion power production system for ships is provided in which hydrogen gas is generated by combining the hydrogen ions and the electrons of the cathode.

According to the present invention, it is possible to achieve all the objects of the present invention described above. Specifically, a secondary battery is provided to generate hydrogen in a discharge process and generate electric energy used as a propulsion power by using carbon dioxide emitted from a heat engine that produces fossil power by burning fossil fuels, and hydrogen generated from a secondary battery By being supplied as an energy source of a heating engine or fuel of a fuel cell, the carbon dioxide emission of a ship can be significantly reduced.

1 is a block diagram showing a schematic configuration of a ship propulsion power production system using carbon dioxide according to an embodiment of the present invention.
2 is a block diagram showing a schematic configuration of a propulsion power production system for ships using carbon dioxide according to another embodiment of the present invention.
3 is a diagram for a first embodiment of the secondary battery shown in FIGS. 1 and 2, and is a schematic diagram illustrating a discharge process.
FIG. 4 is a view of a second embodiment of the secondary battery illustrated in FIGS. 1 and 2, and is a schematic diagram illustrating a discharge process.
FIG. 5 is a diagram for a third embodiment of the secondary battery illustrated in FIGS. 1 and 2, and is a schematic diagram illustrating a discharge process.
FIG. 6 is a diagram for a fourth embodiment of the secondary battery illustrated in FIGS. 1 and 2, and is a schematic diagram illustrating a discharge process.
7 is a diagram for a fifth embodiment of the secondary battery illustrated in FIGS. 1 and 2, and is a schematic diagram illustrating a discharge process.
FIG. 8 is a diagram for a sixth embodiment of the secondary battery illustrated in FIGS. 1 and 2, and is a schematic diagram illustrating a discharge process.
9 is a view of a seventh embodiment of the secondary battery shown in FIGS. 1 and 2, and is a schematic diagram illustrating a discharge process.
10 is a view of an eighth embodiment of the secondary battery shown in FIGS. 1 and 2, and is a schematic diagram illustrating a discharge process.
FIG. 11 is a view for a ninth embodiment of the secondary battery shown in FIGS. 1 and 2, and is a schematic diagram illustrating a discharge process.
12 is a view of a tenth embodiment of the secondary battery shown in FIGS. 1 and 2, and is a schematic diagram illustrating a discharge process.

Hereinafter, the configuration and operation of the embodiment of the present invention will be described in detail with reference to the drawings.

1 is a schematic block diagram of a ship propulsion power production system using carbon dioxide according to an embodiment of the present invention. Referring to FIG. 1, a ship propulsion power production system 1000 using carbon dioxide according to an embodiment of the present invention produces mechanical energy used as a propulsion power of a ship by burning fossil fuel and discharges carbon dioxide as a by-product. The heat engine 1200 and the secondary battery 100 generated in the discharge process by using carbon dioxide, which produces electric energy used as a propulsion power of the ship and discharges hydrogen supplied as an energy source of the heat engine 1200 from the heat engine 1200 ), And a hydrogen storage device 1300 for storing hydrogen generated in the secondary battery 100.

The heat engine 1200 burns fossil fuel to produce mechanical energy used as a propulsion power of the ship, and generates carbon dioxide in the process of burning fossil fuels. The heat engine 1200 includes all types of combustion engines that produce mechanical energy by burning fossil fuels such as diesel engines mainly used for ships. The mechanical energy produced by the heat engine 1200 is used as a propulsion power of the ship, and the carbon dioxide generated by the heat engine 1200 is supplied to the secondary battery 100 for hydrogen production.

The secondary battery 100 generates electric energy in the discharging process, and generates hydrogen gas by using the carbon dioxide gas generated in the heat engine 1200 as a raw material in the discharging process. The electric energy produced by the secondary battery 100 is used as a propulsion power of the ship, and the hydrogen gas generated from the secondary battery 100 is supplied as an energy source of the heat engine 1200 or stored in the hydrogen storage device 1300. The specific configuration of the secondary battery 100 will be described in detail below.

The hydrogen storage device 1300 stores hydrogen generated in the secondary battery 100 for later use.

2 is a schematic block diagram of a propulsion power production system for ships using carbon dioxide according to another embodiment of the present invention. Referring to FIG. 2, a ship propulsion power production system 1000a using carbon dioxide according to another embodiment of the present invention produces mechanical energy used as a propulsion power of a ship by burning fossil fuel and discharges carbon dioxide as a by-product. The heat engine 1200, a reformer 1500 that produces hydrogen-rich reformed gas from hydrocarbons and generates carbon dioxide as a by-product, and an electric energy that is used as a propulsion power of the ship, and from the heat engine 1200 and the reformer 1500 Propulsion of a ship by using hydrogen emitted from the secondary battery 100 generated in the process of discharging hydrogen, hydrogen generated in the secondary battery 100, and reformed gas produced in the reformer 1500 by using the discharged carbon dioxide. It includes a fuel cell (1400) for producing electrical energy used as power.

The heat engine 1200 burns fossil fuel to produce mechanical energy used as a propulsion power of the ship, and generates carbon dioxide in the process of burning fossil fuels. The heat engine 1200 includes all types of combustion engines that produce mechanical energy by burning fossil fuels such as diesel engines mainly used for ships. The mechanical energy produced by the heat engine 1200 is used as a propulsion power of the ship, and the carbon dioxide generated by the heat engine 1200 is supplied to the secondary battery 100 for hydrogen production.

The reformer 1500 produces hydrogen-rich reformed gas from hydrocarbons and additionally generates carbon dioxide gas. Hydrocarbons reformed by the reformer 1500 include methane (CH ₄ ), ethane (C ₂ H ₆ ), propane (C ₃ H ₈ ), butane (C ₄ H) ₁₀ ), hexane (C ₆ H ₁₄ ), heptane (C ₇ H ₁₆ ), octane (C ₈ H ₁₈ ), nonane (C ₉ H ₂₀ ), decane ) (C ₁₀ H ₂₂ ). In this embodiment, it will be described that the reformer 1500 is a methane-steam reformer that produces hydrogen (H ₂ ) by a reforming reaction of methane (CH ₄ ) and water vapor (H ₂ O).

 Methane-steam reformers are a significant part of the hydrogen production process because of the low process cost and the advantages of mass production. The following [Scheme 1] and [Scheme 2] relates to the reforming reaction of the methane-steam reformer.

[Scheme 1]

CH ₄ + H ₂ O-> CO + 3H ₂

[Scheme 2]

CO + H ₂ O-> CO ₂ + H ₂

That is, carbon monoxide (CO) and hydrogen are produced by the chemical reaction between methane and water vapor, and hydrogen can be finally produced by the chemical reaction between carbon monoxide and water vapor. Hydrogen produced in the methane-steam reformer is supplied as fuel in the fuel cell 1400.

However, the methane-steam reformer 1500 has many of the above-mentioned advantages, but as can be seen from [Scheme 1] and [Scheme 2], water vapor must be supplied externally for the operation of the process, and hydrogen production As a by-product of this, there is a problem that carbon dioxide, which is a main cause of the global warming environment problem, must be generated. However, in the case of the present invention, the carbon dioxide generated in the methane-steam reformer is discharged into the atmosphere or transferred to a separate carbon dioxide capture and storage process, instead of a secondary battery for hydrogen production in the discharge process of the secondary battery 100 as shown By being delivered to (100), even the problem of carbon dioxide generation, which is a necessary evil in the operation of the methane-steam reformer, can be solved. Since the methane-steam reformer is a known technique, detailed description thereof is omitted here.

The secondary battery 100 generates electric energy in the discharge process, and generates hydrogen gas using carbon dioxide gas generated in the heat engine 1200 and the reformer 1500 as a raw material in the discharge process. The electric energy produced by the secondary battery 100 is used as a propulsion power of the ship, and the hydrogen gas generated from the secondary battery 100 is supplied as fuel of the fuel cell 1400. The specific configuration of the secondary battery 100 will be described in detail below.

The fuel cell 1400 receives hydrogen contained in the reformed gas produced in the reformer 1500 and hydrogen generated in the secondary battery 100 as raw materials to produce electric energy used as a propulsion power of the ship.

FIG. 3 is a view of a first embodiment of the secondary battery illustrated in FIGS. 1 and 2, and is a schematic diagram illustrating a discharge process. Referring to FIG. 3, the secondary battery 100 includes a cathode unit 110, an anode unit 150, and a connection unit 190 connecting the cathode unit 110 and the anode unit 150. The secondary battery 100 uses the carbon dioxide gas (CO ₂ ), which is a greenhouse gas emitted from a heat engine (1200 in FIGS. 1 and 2) and a reformer (1500 in FIG. ₂ ) as a raw material during discharge, and is an environmentally friendly fuel (H). ₂ ) is produced.

The cathode unit 110 includes a first reaction vessel 110a providing a first reaction space 111 therein, a first aqueous solution 115 contained in the first reaction space 111, and a first aqueous solution 115 ) Is provided with a cathode (118) at least partially submerged. As the first aqueous solution 115, an alkaline aqueous solution (in this embodiment, an elution of CO ₂ in a strong basic solution of 1M KOH is used), seawater, tap water, distilled water, and the like can be used. The cathode 118 is an electrode for forming an electrical circuit, and may be carbon paper, carbon fiber, carbon felt, carbon cloth, metal foam, metal thin film, or a combination thereof, and a platinum catalyst may also be used. In the case of the catalyst, in addition to the platinum catalyst, all other catalysts that can be generally used as an oxygen generating reaction (HER) catalyst, such as a carbon-based catalyst, a carbon-metal-based composite catalyst, and a perovskite oxide catalyst, are included. A first inlet port 112, a first outlet port 113, and a first connector port 114 communicating with the first reaction space 111 are formed in the first reaction container 110a. The first inlet 112 is positioned below the first reaction space 111 so that it is located below the water surface of the first aqueous solution 115. The first outlet 113 is positioned above the first reaction space 111 so as to be positioned above the water surface of the first aqueous solution 115. Carbon dioxide, which is used as a raw material in the discharge process, is introduced into the first reaction space 111 through the first inlet 112, and if necessary, the first aqueous solution 115 may also be introduced. The gas generated in the charging / discharging process is discharged to the outside through the first outlet 113. Although not shown, the inlet 112 and the outlet 113 may be selectively opened and closed in a timely manner by a valve or the like during charging and discharging. The first connector 114 is positioned below the water surface of the first aqueous solution 115, and the connection unit 190 is connected to the first connector 114. In the cathode unit 110, a carbon dioxide elution reaction occurs during a discharge process.

The anode unit 150 includes a second reaction container 150a providing a second reaction space 151 therein, a second aqueous solution 155 contained in the second reaction space 151, and a second aqueous solution 155 ) Is provided with an anode 158 in which at least a part is locked. As the second aqueous solution 155, an alkali solution having a high concentration is used, for example, 1M KOH or 6M KOH may be used. The anode 158 is an electrode of a metal material constituting an electrical circuit, and in this embodiment, it is described that zinc (Zn) or aluminum (Al) is used as the anode 158. In addition, an alloy containing zinc or aluminum may be used as the anode 158. Additionally, vanadium (V), chromium (Cr), manganese (Mn), iron (Fe), cobalt (Co), nickel (Ni), and copper (Cu) may be used as the anode 158, wherein the acid or basic The solution can be used as a second aqueous solution 155. A second connector 154 in communication with the second reaction space 151 is formed in the anode unit 150. The second connector 154 is located below the water surface of the second aqueous solution 155, and the connection part 190 is connected to the second connector 154.

The connection part 190 includes a connection passage 191 connecting the cathode part 110 and the anode part 150, and an ion transfer member 192 installed inside the connection passage 191.

The connection passage 191 extends between the first connector 114 formed in the cathode portion 110 and the second connector 154 formed in the anode portion 150 so that the first reaction space 111 of the cathode portion 110 ) And the second reaction space 151 of the anode 150 are communicated. The ion transfer member 192 is installed inside the connection passage 191.

The ion transfer member 192 is generally formed in a disk shape to block the inside of the connection passage 191. The ion transfer member 192 is made of a porous structure, while allowing movement of ions between the cathode portion 110 and the anode portion 150, while blocking the movement of the aqueous solutions 115 and 155. In this embodiment, the material of the ion transfer member is described as glass, but the present invention is not limited thereto, and other materials having a porous structure may also be used, and this is also within the scope of the present invention. In this embodiment, the ion transfer member 192 has a pore size of 40 to 90 microns corresponding to a G2 grade (grade), 15 to 40 microns corresponding to a G3 grade, 5 to 15 microns corresponding to a G4 grade, Porous glass of 1 to 2 microns corresponding to G5 can be used. The ion transfer member 192 eliminates ion imbalance generated in the discharge process by transferring only ions.

Now, the discharge process of the secondary battery 100 described above with a focus on the configuration will be described in detail. In FIG. 3, the discharge process of the secondary battery 100 is also shown. Referring to FIG. 3, carbon dioxide gas is injected into the first aqueous solution 115 through the first inlet 112, and a chemical elution reaction of carbon dioxide is performed in the cathode 110 as shown in [Scheme 3].

[Scheme 3]

_{H 2 O (l) + CO} 2 (g) → H + (aq) + HCO 3 - (aq)

That is, in the cathode part 110, the carbon dioxide gas (CO ₂ ) supplied to the cathode part 110 is hydrogen cation (H ⁺ ) and bicarbonate through spontaneous chemical reaction with water (H ₂ O) of the first aqueous solution 115 (HCO ₃ ^-) is generated.

In addition, an electrical reaction as shown in [Reaction Scheme 4] is performed at the cathode unit 110.

[Reaction Scheme 4]

^{2H + (aq) + 2e -} → H 2 (g)

That is, hydrogen cations at the cathode portion (110) (H ⁺⁾ are electron (e ^-) is a hydrogen gas (H ₂₎ generated receives. The generated hydrogen gas is discharged to the outside through the first outlet 113.

In addition, a composite hydrogen generating reaction as shown in [Reaction Scheme 5] is performed at the cathode 110.

[Scheme 5]

_{2H 2 O (l) + 2CO} 2 (g) + 2e - → H 2 (g) + 2HCO 3 - (aq)

Then, in the anode unit 150, when the anode 158 is zinc (Zn), an oxidation reaction as shown in the following [Reaction Scheme 6] is performed.

[Scheme 6]

^{Zn + 4OH - → Zn (OH} ) 4 2 - + 2e - (E 0 = -1.25 V)

_{^{Zn (OH) 4 2 - →}} ZnO + H 2 O + 2OH -

As a result, when the anode 158 is zinc (Zn), the overall reaction equation made in the discharge process is as follows.

[Scheme 7]

Zn + 2CO _{2 ^{+ 2H 2 O + 2OH - →}} ZnO + 2HCO 3 - (aq) + H 2 (g) (E 0 = 1.25 V)

If, in the anode unit 150, the anode 158 is aluminum (Al), an oxidation reaction as shown in [Equation 8] is performed.

[Scheme 8]

^{Al + 3OH - → Al (OH} ) 3 ^{+ 3e - (E 0 = -2.31} V)

As a result, when the anode 158 is aluminum (Al), the overall reaction equation made in the discharge process is as follows.

[Scheme 9]

2Al + 6CO _{2 ^{+ 6H 2 O + 6OH - →}} 2Al (OH) 3 ^{_{+ 6HCO 3 - (aq) +}} 3H 2 (g) (E 0 = 2.31 V)

As a result, as can be seen through [Scheme 8] and [Scheme 9], hydrogen ions generated by carbon dioxide eluted from the first aqueous solution 115 upon discharge receive electrons from the cathode 1 18 to produce hydrogen gas. It is reduced to, is discharged through the first outlet 113, the metal anode 158 is changed to the form of oxide.

4 to 12 illustrate the configurations for each of the secondary batteries that can be used in the systems of FIGS. 1 and 2 in place of the secondary battery 100 of the embodiment illustrated in FIG. 3.

4 is a schematic diagram showing a discharge process of a secondary battery according to a second embodiment of the present invention. Referring to FIG. 4, the secondary battery 100a includes a cathode unit 110, an anode unit 150, a connection unit 190 connecting the cathode unit 110 and the anode unit 150, and a carbon dioxide processing unit 120 ), The carbon dioxide circulation supply unit 130, and the cathode 110 and the carbon dioxide processing unit 120, the connecting pipe 140 for communicating. The cathode 110 and the anode 150 and the connecting portion 190 are the same as those described in the embodiment illustrated in FIG. 3, and thus detailed description thereof will be omitted.

The carbon dioxide processing unit 120 includes a receiving container 120a providing an accommodation space 121 therein, and a first aqueous solution accommodated in the accommodation space 121 and the same aqueous solution as the first aqueous solution 115 of the cathode 110 An aqueous solution 115 is provided. The receiving container 120a is located at the upper portion of the receiving space 121, the second inlet 122 through which carbon dioxide gas flows into the receiving space 121, the communication port 123 to which the connecting pipe 140 is connected, and the receiving space 121. The second outlet 124 is formed.

The second inlet 122 is positioned above the communication port 123 in the accommodation space 121, and is located below the water surface of the second outlet 124 and the first aqueous solution 115. Carbon dioxide gas used as a raw material in the discharge process is introduced into the receiving space 121 through the second inlet 122. The first aqueous solution 115 may also be supplied as needed through the second inlet 122. The second inlet 122 and the first outlet 113 may be selectively opened and closed at appropriate times by a valve or the like during charging and discharging.

The communication port 123 is located below the second inlet port 122 in the accommodation space 121, and a connection pipe 140 is connected to the communication port 123. The accommodation space 121 communicates with the first reaction space 111 through the communication port 123.

The second outlet 124 is located above the water surface of the second inlet 122 and the first aqueous solution 115 in the accommodation space 121. Carbon dioxide gas that is not ionized because it is not dissolved in the first aqueous solution 115 in the receiving space 121 is discharged to the outside through the second outlet 124. The carbon dioxide gas discharged through the second outlet 124 is supplied to the second inlet 122 through the carbon dioxide circulation supply unit 130.

The carbon dioxide circulation supply unit 130 recirculates the carbon dioxide gas discharged through the second outlet 224 to the second inlet 122 to re-supply it.

The connector 140 connects the first inlet port 112 of the first reaction space 111 and the communication port 123 of the receiving space 121. The first reaction space 111 and the accommodation space 121 communicate with each other through a connection passage 141 formed inside the connection pipe 140.

Carbon dioxide gas that is not ionized because it is not dissolved in the first aqueous solution 115 among the carbon dioxide introduced into the accommodation space 121 of the carbon dioxide processing unit 120 through the second inlet 122 is the first reaction space of the cathode 110 The carbon dioxide gas discharged through the second outlet 124 and discharged through the second outlet 124 after being collected in the space above the water surface of the first aqueous solution 115 in the receiving space 121 without being able to move to (111) Is supplied to the receiving space 121 through the second inlet 122 by the carbon dioxide circulation supply unit 130 is recycled. In addition, carbon dioxide gas that is not ionized because it is not dissolved in the first aqueous solution 115 among the carbon dioxide introduced into the accommodation space 121 of the carbon dioxide processing unit 120 does not move to the first reaction space 111 of the cathode 110. Since it is not possible, high-purity hydrogen in which carbon dioxide is not mixed may be discharged through the first outlet 113.

5 is a schematic view illustrating a discharge process of a secondary battery according to a third embodiment of the present invention. Referring to FIG. 5, the secondary battery 200 includes a cathode unit 210, an anode unit 250, and a connection unit 290 connecting the cathode unit 110 and the anode unit 150.

The cathode unit 210 includes a first reaction vessel 210a providing a first reaction space 211 therein, a first aqueous solution 215 contained in the first reaction space 211, and a first aqueous solution 215 ) Is provided with a cathode 218 that is at least partially submerged. As the first aqueous solution 215, an aqueous potassium hydroxide solution (in this embodiment, an elution of CO ₂ in a strong basic solution of 1M KOH is used) is used. The cathode 218 is an electrode for forming an electrical circuit, and may be carbon paper, carbon fiber, carbon felt, carbon cloth, metal foam, metal thin film, or a combination thereof, and a platinum catalyst may also be used. In the case of the catalyst, in addition to the platinum catalyst, all other catalysts that can be generally used as an oxygen generating reaction (HER) catalyst, such as a carbon-based catalyst, a carbon-metal-based composite catalyst, and a perovskite oxide catalyst, are included. A first inlet 212, a first outlet 213, and a first connector 214 in communication with the first reaction space 211 are formed in the first reaction vessel 210a. The first inlet 212 is positioned below the first reaction space 211 so as to be positioned below the water surface of the first aqueous solution 215. The first outlet 213 is positioned above the first reaction space 211 so as to be positioned above the water surface of the first aqueous solution 215. Carbon dioxide, which is used as a raw material in the discharge process, is introduced into the first reaction space 211 through the first inlet 212, and if necessary, the first aqueous solution 215 may also be introduced. The gas generated during the charging / discharging process is discharged to the outside through the first outlet 213. Although not shown, the inlet 212 and the outlet 213 may be selectively opened and closed in a timely manner by a valve or the like during charging and discharging. The first connector 214 is positioned below the water surface of the first aqueous solution 215, and the connection part 290 is connected to the first connector 214. In the cathode unit 210, a carbon dioxide elution reaction occurs during the discharge process.

The anode unit 250 includes a second reaction vessel 250a providing a second reaction space 251 therein, a second aqueous solution 255 contained in the second reaction space 251, and a second aqueous solution 255 ) Is provided with an anode 258 at least partially locked. As the second aqueous solution 255, an alkali solution having a high concentration is used. In this embodiment, it is described that an aqueous potassium hydroxide solution is used, for example, 1M KOH or 6M KOH may be used. The anode 258 is an electrical circuit. As an electrode made of a metal material, zinc (Zn) or aluminum (Al) is used as the anode 258 in this embodiment. Further, as the anode 258, an alloy containing zinc or aluminum may be used. Additionally, vanadium (V), chromium (Cr), manganese (Mn), iron (Fe), cobalt (Co), nickel (Ni), and copper (Cu) may be used as the anode 258, where acid or basic The solution can be used as a second aqueous solution 155. A second connector 254 communicating with the second reaction space 251 is formed in the anode unit 250. The second connector 254 is positioned below the water surface of the second aqueous solution 255, and the connection part 290 is connected to the second connector 254.

The connection part 290 includes a connection passage 291 connecting the cathode part 210 and the anode part 250, and an ion exchange membrane 292 installed inside the connection passage 291.

The connection passage 291 extends between the first connector 214 formed in the cathode portion 210 and the second connector 254 formed in the anode portion 250 so that the first reaction space 211 of the cathode portion 210 ) And the second reaction space 251 of the anode unit 250 are communicated. An ion exchange membrane 292 is installed inside the connection passage 291.

The ion exchange membrane 292 is installed in a form to block the inside of the connection passage 291. The ion exchange membrane 292 allows only the movement of ions between the cathode portion 210 and the anode portion 250. The potassium ion (K ⁺ ) contained in the second aqueous solution 255 moves to the first aqueous solution 215 by the ion exchange membrane 292. In this embodiment, as the ion exchange membrane 292, it is described that a fluorine resin-based cation exchange membrane Nafion developed by DuPont, USA is used, but the present invention is not limited thereto, and potassium ions ( Anything that allows only the movement of K ⁺ ) is possible. The ion exchange membrane 292 eliminates ion imbalance generated in the discharge process by transferring only ions.

6 is a schematic diagram showing a discharge process of a secondary battery according to a fourth embodiment of the present invention. Referring to FIG. 6, the secondary battery 200a includes a cathode unit 210, an anode unit 250, a connection unit 290 connecting the cathode unit 210 and the anode unit 250, and a carbon dioxide processing unit 120 ), The carbon dioxide circulation supply unit 130, and the cathode 210 and the carbon dioxide processing unit 220 to communicate with the connecting pipe 140. The cathode unit 210, the anode unit 250, and the connection unit 290 are the same as those described in the embodiment illustrated in FIG. 5, and the carbon dioxide processing unit 120, the carbon dioxide circulation supply unit 130, and the connection pipe 140 are Since it is the same as the corresponding configuration shown in FIG. 4, detailed description thereof will be omitted.

7 is a schematic diagram illustrating a discharge process of a secondary battery according to a fifth embodiment of the present invention. Referring to FIG. 7, the secondary battery 300 includes a cathode part 210, an anode part 250, and a connection part 390 connecting the cathode part 110 and the anode part 150. The cathode unit 210 and the anode unit 250 are the same as the corresponding configurations of the embodiment illustrated in FIG. 5, and thus detailed description thereof will be omitted.

The connection part 390 includes a connection passage 291 connecting the cathode part 210 and the anode part 250, and an ion exchange membrane 392 installed inside the connection passage 291.

The connection passage 291 extends between the first connector 214 formed in the cathode portion 210 and the second connector 254 formed in the anode portion 250 so that the first reaction space 211 of the cathode portion 210 ) And the second reaction space 251 of the anode unit 250 are communicated. An ion exchange membrane 292 is installed inside the connection passage 291.

The ion exchange membrane 392 is installed in a form that blocks the inside of the connection passage 291. The ion exchange membrane 392 only allows the movement of ions between the cathode portion 210 and the anode portion 250. Through the ion exchange membrane 392, the hydroxide ions contained in the first aqueous solution (115) (OH ^-) is moved in the second solution (155). In this embodiment, as the ion exchange membrane 392, it is described that a fluorine resin-based cation exchange membrane Nafion developed by DuPont, USA is used, but the present invention is not limited thereto, and hydroxide ions ( all as long as it is possible that only) movement of the ^- OH. Hydroxide ions by an ion exchange membrane (392) (OH ^-) is written doemeu delivered from the cathode 110 to the anode 150, thereby eliminating the ion imbalance caused in the discharge process.

8 is a schematic diagram showing a discharge process of a secondary battery according to a sixth embodiment of the present invention. Referring to FIG. 8, the secondary battery 300a includes a cathode unit 210, an anode unit 250, a connection unit 390 connecting the cathode unit 210 and the anode unit 250, and a carbon dioxide processing unit 120 ), The carbon dioxide circulation supply unit 130, and the cathode 210 and the carbon dioxide processing unit 220 to communicate with the connecting pipe 140. The cathode unit 210, the anode unit 250, and the connection unit 290 are the same as those described in the embodiment shown in FIG. 7, and the carbon dioxide processing unit 120, the carbon dioxide circulation supply unit 130, and the connection pipe 140 are Since it is the same as the corresponding configuration shown in FIG. 4, detailed description thereof will be omitted.

9 is a schematic diagram showing a discharge process of a secondary battery according to a seventh embodiment of the present invention. Referring to FIG. 9, the secondary battery 400 includes a cathode part 410, an anode part 450, and a salt bridge 490 connecting the cathode part 410 and the anode part 450. do. The secondary battery 100 uses the greenhouse gas carbon dioxide gas (CO ₂ ) as a raw material during the discharge process to produce hydrogen (H ₂ ), which is an eco-friendly fuel.

The cathode unit 410 includes a first reaction vessel 410a providing a first reaction space 411 therein, a first aqueous solution 415 contained in the first reaction space 411, and a first aqueous solution 415 ) Is provided with a cathode (418) at least partially submerged. One end of the salt bridge 490 is immersed in the first aqueous solution 415. As the first aqueous solution 415, an alkaline aqueous solution (in this embodiment, an elution of CO ₂ in a strong basic solution of 1M KOH is used), seawater, tap water, distilled water, and the like can be used. The cathode 418 is an electrode for forming an electrical circuit, and may be carbon paper, carbon fiber, carbon felt, carbon cloth, metal foam, metal thin film, or a combination thereof, and a platinum catalyst may also be used. In the case of the catalyst, in addition to the platinum catalyst, all other catalysts that can be generally used as an oxygen generating reaction (HER) catalyst, such as a carbon-based catalyst, a carbon-metal-based composite catalyst, and a perovskite oxide catalyst, are included. A first inlet 412 and a first outlet 413 communicating with the first reaction space 411 are formed in the first reaction vessel 410a. The first inlet 412 is positioned below the first receiving space 411 so as to be positioned below the water surface of the first aqueous solution 415. The first outlet 413 is positioned above the first reaction space 411 so as to be positioned above the water surface of the first aqueous solution 415. Carbon dioxide gas used as a raw material in the discharge process is introduced into the first reaction space 411 through the first inlet 412, and if necessary, the first aqueous solution 415 may also be introduced. Gas generated in the charging / discharging process is discharged to the outside through the first outlet 413. Although not shown, the inlet 412 and the outlet 413 may be selectively opened and closed in a timely manner by a valve or the like during charging and discharging. In the cathode portion 410, a carbon dioxide elution reaction occurs in the discharge process.

The anode unit 450 includes a second reaction container 450a providing a second reaction space 451 therein, a second aqueous solution 455 contained in the second reaction space 451, and a second aqueous solution 455 ) Is provided with an anode 458 at least partially locked. One end of the salt bridge 490 is immersed in the second aqueous solution 455. As the second aqueous solution 455, an alkali solution having a high concentration is used, for example, 1M KOH or 6M KOH may be used. The anode 458 is an electrode made of a metal forming an electrical circuit, and in this embodiment, it will be described that zinc (Zn) or aluminum (Al) is used as the anode 458. In addition, an alloy containing zinc or aluminum may be used as the anode 458.

Both ends of the salt bridge 490 are immersed in the first aqueous solution 415 and the second aqueous solution 455, respectively. As the internal solution of the salt bridge 490, a commonly used internal solution of the salt bridge may be used, such as potassium chloride (KCl) or sodium chloride (NaCl).

As the discharge proceeds, HCO ₃ ⁻ (bicarbonate ions) is generated in the first aqueous solution 415. When the internal solution of the salt bridge 490 includes sodium ions (Na ⁺ ) such as sodium chloride (NaCl), the ionic balance is improved. To match, sodium ions are diffused from the salt bridge 490 and exist as ions in the form of an aqueous sodium hydrogen carbonate (NaHCO ₃ ) solution. When the solution is dried, a sodium carbonate solid product in the form of baking soda is additionally obtained.

10 is a schematic diagram showing a discharge process of a secondary battery according to an eighth embodiment of the present invention. Referring to FIG. 10, the secondary battery 400a includes a cathode part 410, an anode part 450, a salt bridge 490 connecting the cathode part 410 and the anode part 450, and a carbon dioxide processing part 120 ), The carbon dioxide circulation supply unit 130, and the cathode 210 and the carbon dioxide processing unit 220 to communicate with the connecting pipe 140. The cathode unit 410, the anode unit 450, and the salt bridge 490 are the same as each of the corresponding components described in the embodiment illustrated in FIG. 9, and the carbon dioxide processing unit 120, the carbon dioxide circulation supply unit 130, and connections Since the tube 140 is the same as each of the corresponding components shown in FIG. 4, detailed description thereof will be omitted.

11 is a schematic diagram showing a discharge process of a secondary battery according to a ninth embodiment of the present invention. Referring to FIG. 11, the secondary battery 500 includes a reaction vessel 510 providing a reaction space 511 therein, an aqueous electrolyte aqueous solution 515 contained in the reaction space 511, and a reaction space 511. It includes a cathode (518) at least partially submerged in the aqueous electrolyte solution 115, and an anode (558) at least partially submerged in the aqueous electrolyte solution 115 in the reaction space 511. The secondary battery 500 uses the carbon dioxide gas (CO ₂ ), which is a greenhouse gas, as a raw material in the discharge process to produce hydrogen (H ₂ ), which is an eco-friendly fuel.

The reaction container 510 provides a reaction space 511 in which an aqueous aqueous electrolyte solution 515 is contained and a cathode 518 and an anode 558 are accommodated. The reaction vessel 510 is formed with a first inlet 512 and a first outlet 513 communicating with the reaction space 511. The first inlet 512 is positioned below the reaction space 511 so as to be positioned below the water surface of the aqueous aqueous electrolyte solution 515. The first outlet 513 is positioned above the reaction space 511 so as to be positioned above the water surface of the aqueous aqueous electrolyte solution 515. Carbon dioxide gas used as a raw material in the discharge process is introduced into the reaction space 511 through the first inlet 512, and an aqueous aqueous electrolyte solution 515 may also be introduced if necessary. The gas generated in the charging / discharging process is discharged through the first outlet 513. Although not illustrated, the first inlet 512 and the first outlet 513 may be selectively opened and closed in a timely manner by a valve or the like during charging and discharging. In the reaction space 511, a carbon dioxide elution reaction occurs in the discharge process.

The aqueous electrolyte solution 515 is contained in the reaction space 511, and at least a portion of the cathode 518 and at least a portion of the anode 558 are immersed in the aqueous electrolyte solution 515. In this embodiment, it will be described that a basic solution or seawater is used as the aqueous electrolyte solution 515. The aqueous electrolyte solution 515 becomes weakly acidic by the carbon dioxide gas flowing through the first inlet 512 during the discharge process.

The cathode 518 is at least partially submerged in the aqueous electrolyte solution 515 in the reaction space 511. The cathode 518 is positioned relatively closer to the first inlet 512 than the anode 558 in the reaction space 511. The cathode 518 is an electrode for forming an electrical circuit, and may be carbon paper, carbon fiber, carbon felt, carbon cloth, metal foam, metal thin film, or a combination thereof, and a platinum catalyst may also be used. In the case of the catalyst, in addition to the platinum catalyst, all other catalysts that can be generally used as an oxygen generating reaction (HER) catalyst, such as a carbon-based catalyst, a carbon-metal-based composite catalyst, and a perovskite oxide catalyst, are included. During discharge, a reduction reaction occurs at the cathode 518, and hydrogen is generated accordingly.

The anode 558 is at least partially submerged in the aqueous electrolyte solution 515 in the reaction space 511. The anode 558 is positioned relatively far from the first inlet 512 than the cathode 518 in the reaction space 511. The anode 558 is an electrode made of a metal forming an electrical circuit, and in this embodiment, as the anode 158, vanadium (V), chromium (Cr), manganese (Mn), iron (Fe), cobalt (Co), and nickel It is explained that (Ni), copper (Cu), aluminum (Al) or zinc (Zn) is used. During discharge, an oxidation reaction according to a weakly acidic environment occurs at the anode 158.

Now, the process of discharging the secondary battery 100 described above as a configuration center will be described in detail. 11 shows the discharge process of the secondary battery 500 together. Referring to FIG. 11, carbon dioxide gas is injected into the aqueous electrolyte solution 515 through the first inlet 512 during discharge, and a chemical elution reaction of carbon dioxide as in [Reaction Scheme 3] is performed in the reaction space 511. That is, the carbon dioxide supplied to the reaction chamber (511) (CO ₂₎ is an aqueous electrolyte solution (515) of water (H ₂ O) and spontaneous hydrogen cations through a chemical reaction (H ⁺⁾ and bicarbonate (HCO ₃ ^-) is generated do.

In addition, an electrical reaction as in [Reaction Scheme 4] is performed at the cathode 518. That is, the hydrogen cation (H ⁺ ) in the vicinity of the cathode 518 receives electrons (e ⁻ ) from the cathode 118 to generate hydrogen (H ₂ ) gas. The generated hydrogen (H ₂ ) gas is discharged to the outside through the first outlet 513.

In addition, a complex hydrogen generating reaction such as [Reaction Scheme 5] is performed around the cathode 518.

And, in the anode 558, when the anode 558 is zinc (Zn), an oxidation reaction as shown in [Scheme 6] is performed.

As a result, when the anode 558 is zinc (Zn), the overall reaction equation formed in the discharge process is the same as [Scheme 7].

If, in the anode 550, the anode 558 is aluminum (Al), an oxidation reaction as shown in [Equation 8] is performed.

As a result, when the anode 558 is aluminum (Al), the overall reaction equation formed in the discharge process is the same as [Scheme 9].

As a result, hydrogen ions generated by carbon dioxide eluted from the aqueous electrolyte solution 515 upon discharge receive electrons from the cathode 518 and are reduced to hydrogen gas, discharged through the first outlet 513, and the metal anode ( 558) is changed to the form of oxide.

12 is a schematic diagram showing a discharge process of a secondary battery according to a tenth embodiment of the present invention. Referring to FIG. 12, the secondary battery 500a includes a reaction vessel 510 providing a reaction space 511 therein, an aqueous aqueous electrolyte solution 515 contained in the reaction space 511, and a reaction space 511. A cathode 518 in which at least a part is submerged in the aqueous electrolyte 515, an anode 558 in which at least a part is submerged in the aqueous electrolyte solution 515 in the reaction space 511, and a carbon dioxide processing unit 120 And, the carbon dioxide circulation supply unit 130, and includes a connection pipe 140 for connecting the reaction vessel 510 and the carbon dioxide processing unit 120. The reaction vessel 510, the aqueous electrolyte solution 515, the cathode 518, and the anode 558 are the same as each of the corresponding configurations described in the embodiment shown in FIG. 11, and the carbon dioxide processing unit 120, carbon dioxide circulation The supply unit 130 and the connection pipe 140 are the same as each of the corresponding components illustrated in FIG. 4, so a detailed description thereof will be omitted.

The present invention has been described through the above embodiments, but the present invention is not limited thereto. The above embodiments may be modified or changed without departing from the spirit and scope of the present invention, and those skilled in the art will recognize that such modifications and changes also belong to the present invention.

100, 100a: secondary battery 110: cathode portion
111: first receiving space 112: first inlet
113: first outlet 115: first aqueous solution
118: cathode 120: carbon dioxide treatment unit
121: third receiving space 122: second inlet
123: communication port 124: second outlet
130: carbon dioxide circulation supply unit 140: connector
150: anode 151: the second receiving space
155 second aqueous solution 158 anode
190: connecting portion 191: connecting passage
192: ion transfer member 200: fuel cell
300: reformer 400: carbon dioxide supply
500: hydrogen supply unit 600: reformed gas supply unit
1000: composite battery system

Claims (15)

A heat engine that burns fossil fuel to produce mechanical energy used as a propulsion power of a ship and to discharge carbon dioxide gas as a by-product;
A secondary battery for producing electric energy used as a propulsion power of a ship;
A fuel cell producing electrical energy used as a propulsion power of the ship; And
It includes a reformer that produces hydrogen-rich reformed gas from hydrocarbons and generates carbon dioxide gas as a by-product.
The secondary battery includes a first aqueous solution accommodated in a first reaction space, a cathode immersed in at least a portion of the first aqueous solution, a basic second aqueous solution accommodated in a second reaction space, and at least a portion of the second aqueous solution. Porosity that blocks the movement of the first aqueous solution and the second aqueous solution and allows the movement of ions by being installed in the connection passage, the connection passage connecting the first reaction space and the second reaction space, and the locked anode It has a structured ion transfer member,
During the discharge process of the secondary battery, carbon dioxide gas discharged from the heat engine and carbon dioxide gas generated in the reformer flow into the first aqueous solution, and hydrogen ions and bicarbonate ions are reacted by the reaction of water and the carbon dioxide gas in the first aqueous solution. Is generated, the hydrogen ions and electrons of the cathode are combined to generate hydrogen gas,
The fuel cell is a propulsion power production system for ships receiving the reformed gas and hydrogen generated in the secondary battery as fuel. A heat engine that burns fossil fuel to produce mechanical energy used as a propulsion power of a ship and to discharge carbon dioxide gas as a by-product;
A secondary battery for producing electric energy used as a propulsion power of a ship;
A fuel cell producing electrical energy used as a propulsion power of the ship; And
It includes a reformer that produces hydrogen-rich reformed gas from hydrocarbons and generates carbon dioxide gas as a by-product.
The secondary battery includes a first reaction space, an accommodation space communicating with the first reaction space, a first aqueous solution accommodated in the first reaction space and the accommodation space, and the first aqueous solution in the first reaction space Cathode at least partially submerged, a second reaction space, a basic second aqueous solution accommodated in the second reaction space, an anode at least partially submerged in the second aqueous solution, the first reaction space and the second It is provided with a connection passage for communicating the reaction space, and is provided in the connection passage to block the movement of the first aqueous solution and the second aqueous solution and to allow the movement of ions, the ion transport member having a porous structure,
During the discharge process of the secondary battery, carbon dioxide gas discharged from the heat engine and carbon dioxide gas generated in the reformer flow into the first aqueous solution in the accommodation space, and hydrogen ions are reacted with water and the carbon dioxide gas in the first aqueous solution. Bicarbonate ions are generated, and in the first reaction space, hydrogen ions and electrons of the cathode are combined to generate hydrogen gas,
The fuel cell receives the reformed gas and hydrogen generated in the secondary cell as fuel,
The carbon dioxide gas that is not ionized among the carbon dioxide gas flowing into the first aqueous solution in the receiving space is separated from the first aqueous solution in the receiving space and is not supplied to the first reaction space. The method according to claim 1 or claim 2,
The material of the ion transmitting member is glass, a propulsion power production system for ships. The method according to claim 1 or claim 2,
The pores formed in the ion transmitting member are 40 to 90 microns, 15 to 40 microns, 5 to 15 microns, or 1 to 2 microns. A heat engine that burns fossil fuel to produce mechanical energy used as a propulsion power of a ship and to discharge carbon dioxide gas as a by-product;
A secondary battery for producing electric energy used as a propulsion power of a ship;
A fuel cell producing electrical energy used as a propulsion power of the ship; And
It includes a reformer that produces hydrogen-rich reformed gas from hydrocarbons and generates carbon dioxide gas as a by-product.
The secondary battery includes: a first aqueous potassium hydroxide solution accommodated in a first reaction space, a cathode at least partially submerged in the first potassium hydroxide aqueous solution, a second aqueous potassium hydroxide solution accommodated in a second reaction space, and the second Movement of the first potassium hydroxide aqueous solution and the second potassium hydroxide aqueous solution by being installed in the connection passage, and a connection passage communicating the first reaction space and the second reaction space with an anode at least partially submerged in an aqueous potassium hydroxide solution. Is equipped with an ion exchange membrane that blocks silver and allows the movement of ions,
During the discharge process of the secondary battery, carbon dioxide gas discharged from the heat engine and carbon dioxide gas generated in the reformer are introduced into the first potassium hydroxide aqueous solution, and hydrogen ions are reacted by water and the carbon dioxide gas in the first potassium hydroxide aqueous solution. And bicarbonate ions are generated, and the hydrogen ions and electrons of the cathode are combined to generate hydrogen gas,
The fuel cell is a propulsion power production system for ships receiving the reformed gas and hydrogen generated in the secondary battery as fuel. A heat engine that burns fossil fuel to produce mechanical energy used as a propulsion power of a ship and to discharge carbon dioxide gas as a by-product;
A secondary battery for producing electric energy used as a propulsion power of a ship;
A fuel cell producing electrical energy used as a propulsion power of the ship; And
It includes a reformer that produces hydrogen-rich reformed gas from hydrocarbons and generates carbon dioxide gas as a by-product.
The secondary battery may include a first reaction space, an accommodation space in communication with the first reaction space, a first potassium hydroxide aqueous solution accommodated in the first reaction space and the accommodation space, and the first reaction space in the first reaction space. 1 Cathode at least partially immersed in an aqueous potassium hydroxide solution, a second reaction space, a second potassium hydroxide aqueous solution accommodated in the second reaction space, an anode at least partially immersed in the second potassium hydroxide aqueous solution, and the first A connection passage communicating the reaction space and the second reaction space, and an ion exchange membrane installed in the connection passage to block the movement of the first aqueous potassium hydroxide solution and the second aqueous potassium hydroxide solution and to allow the movement of ions And
In the process of discharging the secondary battery, carbon dioxide gas discharged from the heat engine and carbon dioxide gas generated in the reformer flow into the first potassium hydroxide aqueous solution in the accommodation space to react with water and the carbon dioxide gas in the first potassium hydroxide aqueous solution. Hydrogen ions and bicarbonate ions are generated by this, and in the first reaction space, hydrogen ions and electrons of the cathode are combined to generate hydrogen gas,
The fuel cell receives the reformed gas and hydrogen generated in the secondary cell as fuel,
Carbon dioxide gas that is not ionized among the carbon dioxide gas flowing into the first aqueous potassium hydroxide solution in the receiving space is separated from the first aqueous potassium hydroxide solution in the receiving space and is not supplied to the first reaction space for ships. . The method according to claim 5 or claim 6,
The ion exchange membrane is a propulsion power production system for ships that allows potassium ions to move from the second reaction space to the first reaction space. The method according to claim 5 or claim 6,
The ion exchange membrane is a propulsion power production system for ships that allows hydroxide ions to move from the first reaction space to the second reaction space. A heat engine that burns fossil fuel to produce mechanical energy used as a propulsion power of a ship and to discharge carbon dioxide gas as a by-product;
A secondary battery for producing electric energy used as a propulsion power of a ship;
A fuel cell producing electrical energy used as a propulsion power of the ship; And
It includes a reformer that produces hydrogen-rich reformed gas from hydrocarbons and generates carbon dioxide gas as a by-product.
The secondary battery includes a first aqueous solution accommodated in a first reaction space, a cathode immersed in at least a portion of the first aqueous solution, a basic second aqueous solution accommodated in a second reaction space, and at least a portion of the second aqueous solution. And a salt bridge connecting the locked anode and the first aqueous solution and the second aqueous solution,
During the discharge process of the secondary battery, carbon dioxide gas discharged from the heat engine and carbon dioxide gas generated in the reformer flow into the first aqueous solution, and hydrogen ions and bicarbonate ions are reacted by the reaction of water and the carbon dioxide gas in the first aqueous solution. Is generated, the hydrogen ions and electrons of the cathode are combined to generate hydrogen gas,
The fuel cell is a propulsion power production system for ships receiving the reformed gas and hydrogen generated in the secondary battery as fuel. A heat engine that burns fossil fuel to produce mechanical energy used as a propulsion power of a ship and to discharge carbon dioxide gas as a by-product;
A secondary battery for producing electric energy used as a propulsion power of a ship;
A fuel cell producing electrical energy used as a propulsion power of the ship; And
It includes a reformer that produces hydrogen-rich reformed gas from hydrocarbons and generates carbon dioxide gas as a by-product.
The secondary battery includes a first reaction space, an accommodation space communicating with the first reaction space, a first aqueous solution accommodated in the first reaction space and the accommodation space, and the first aqueous solution in the first reaction space Cathode at least partially submerged, a second reaction space, a basic second aqueous solution accommodated in the second reaction space, an anode at least partially submerged in the second aqueous solution, the first aqueous solution and the second aqueous solution It has a salt bridge connecting the
During the discharge process of the secondary battery, carbon dioxide gas discharged from the heat engine and carbon dioxide gas generated in the reformer flow into the first aqueous solution in the accommodation space, and hydrogen ions are reacted with water and the carbon dioxide gas in the first aqueous solution. Bicarbonate ions are generated, and in the first reaction space, hydrogen ions and electrons of the cathode are combined to generate hydrogen gas,
The fuel cell receives the reformed gas and hydrogen generated in the secondary cell as fuel,
The carbon dioxide gas that is not ionized among the carbon dioxide gas flowing into the first aqueous solution in the receiving space is separated from the first aqueous solution in the receiving space and is not supplied to the first reaction space. A heat engine that burns fossil fuel to produce mechanical energy used as a propulsion power of a ship and to discharge carbon dioxide gas as a by-product;
A secondary battery for producing electric energy used as a propulsion power of a ship;
A fuel cell producing electrical energy used as a propulsion power of the ship; And
It includes a reformer that produces hydrogen-rich reformed gas from hydrocarbons and generates carbon dioxide gas as a by-product.
The secondary battery includes an aqueous electrolyte accommodated in a reaction space, a cathode at least partially submerged in the aqueous electrolyte in the reaction space, and an anode submerged in the aqueous electrolyte in the reaction space,
During the discharge process of the secondary battery, carbon dioxide gas discharged from the heat engine and carbon dioxide gas generated in the reformer flow into the aqueous electrolyte, and hydrogen ions and bicarbonate ions are generated by the reaction of water and the carbon dioxide gas in the aqueous electrolyte, , The hydrogen ions and electrons of the cathode are combined to generate hydrogen gas,
The fuel cell is a propulsion power production system for ships receiving the reformed gas and hydrogen generated in the secondary battery as fuel. A heat engine that burns fossil fuel to produce mechanical energy used as a propulsion power of a ship and to discharge carbon dioxide gas as a by-product;
A secondary battery for producing electric energy used as a propulsion power of a ship;
A fuel cell producing electrical energy used as a propulsion power of the ship; And
It includes a reformer that produces hydrogen-rich reformed gas from hydrocarbons and generates carbon dioxide gas as a by-product.
The secondary battery includes a reaction space, an accommodation space in communication with the reaction space, an aqueous electrolyte accommodated in the reaction space and the accommodation space, a cathode at least partially submerged in the aqueous electrolyte in the reaction space, and the reaction. An anode at least partially submerged in the aqueous electrolyte in a space,
In the process of discharging the secondary battery, carbon dioxide gas discharged from the heat engine and carbon dioxide gas generated in the reformer flow into the aqueous electrolyte in the accommodation space, and hydrogen ions and bicarbonate ions are reacted by the reaction of water and the carbon dioxide gas in the aqueous electrolyte. This is generated, the hydrogen ions are generated by the electrons of the hydrogen ion and the cathode in the reaction space,
The fuel cell receives the reformed gas and hydrogen generated in the secondary cell as fuel,
The carbon dioxide gas which is not ionized among the carbon dioxide gas flowing into the water-based electrolyte in the accommodation space is separated from the water-based electrolyte in the accommodation space and is not supplied to the reaction space. delete delete delete

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