KR101926780B1 - Intermittent electrochemical reduction system of carbon dioxide - Google Patents

Abstract

To an intermittent electrochemical reduction system of carbon dioxide.

Description

TECHNICAL FIELD [0001] The present invention relates to an intermittent electrochemical reduction system for carbon dioxide,

The present invention relates to an intermittent electrochemical reduction system of carbon dioxide.

Carbon-based materials on the Earth form carbon cycles in many forms and maintain a certain amount and balance. However, this balance is breaking due to the increase in atmospheric carbon dioxide (CO ₂ ), one of the carbon-forming substances.

The biggest problem caused by the increase of atmospheric carbon dioxide is global warming. The United Nations Intergovernmental Panel on Climate Change (IPCC) has made it clear that if technologies around the world can not cope with climate change too easily to control carbon dioxide emissions for the next 15 years, current technology will reduce climate change to a level that is virtually impossible. Therefore, researches are actively conducted to remove atmospheric carbon dioxide from the world, recognizing the danger of rapid increase of carbon dioxide in the atmosphere.

Until recently, carbon capture and storage (CCS) has been actively studied as a technology for removing atmospheric carbon dioxide. However, the CCS requires a large space for storing captured carbon dioxide, and there is a risk of storing a large amount of carbon dioxide in one place. Due to these problems, CCU (Carbon Capture and Utilization) technology, which can convert the captured CO ₂ directly into a useful substance without storing it, is drawing attention. If the carbon dioxide captured by CCS is buried in waste, it is recycled as a high-value-added product by utilizing it. Since carbon dioxide is the most abundant carbon source on the planet, various technologies are being studied to convert it into a useful substance [Korean Patent Publication No. 10-2008-0016198].

In the case of electrochemical carbon dioxide conversion, carbon dioxide is converted through electrode reaction using a kind of catalytic chemical method using electric energy. It is possible to switch at a relatively room temperature and atmospheric pressure condition, and the equipment is simple, and the kind of working electrode It is possible to produce an effective amount of carbon dioxide by selectively producing the product according to the method described in Korean Patent Publication No. 2014-0084640. However, when carbon dioxide is converted using an electrochemical method, there may arise problems such as power failure due to power supply and demand problems.

Recently, interest in smart grid, which is an intelligent power network that exchanges real-time information in both directions by electric power supplier and user, is increasing by applying information technology to existing power grid. Because the user's time-of-day power usage is measured in real time and transmitted to the power supplier, both the power supplier and the user can optimize energy efficiency and reduce the ratio. In other words, the power supplier can flexibly adjust the power supply based on the real-time power usage status, and the power user can also control the power usage time and usage amount.

Although there have been many studies to convert carbon dioxide into useful materials, no other report has yet been published on how to reliably convert carbon dioxide to intermittent power.

The present invention seeks to provide an intermittent electrochemical reduction system of carbon dioxide.

However, the problems to be solved by the present invention are not limited to the above-mentioned problems, and other problems not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided an electrochemical reduction reactor for carbon dioxide including an oxidation electrode unit and a reducing electrode unit to which carbon dioxide is supplied, and an energy source supply unit for intermittently supplying electricity to the electrochemical reduction reactor of the carbon dioxide, Wherein the carbon dioxide is reduced by intermittently applying electricity to an electrochemical reduction reactor of carbon dioxide. The present invention also provides an intermittent electrochemical reduction system of carbon dioxide.

According to one embodiment of the present invention, it is possible to convert carbon dioxide into useful compounds such as formic acid, carbon monoxide and methanol by using electric energy generated from thermal power, nuclear power, wind power, tidal force, Can be used commercially.

According to an embodiment of the present invention, when carbon dioxide is intermittently reduced by using renewable energy such as wind power, tidal force, intelligent power, sunlight, or hydroelectric power, when using existing thermal power generation, A carbon dioxide abatement system can be constructed by utilizing an electric energy source of carbon 0 state.

According to one embodiment of the present invention, idle power or low power can be utilized by electrochemically reducing carbon dioxide intermittently using night power among power generated by thermal power generation or nuclear power generation as an energy source.

According to one embodiment of the present invention, the compounds can be regenerated as electric energy by using a compound such as formic acid, carbon monoxide, or methanol converted to carbon dioxide as a raw material for a fuel cell.

According to an embodiment of the present invention, the intermittent electrochemical reduction system of carbon dioxide can be processed more efficiently by linking with the smart grid.

According to an embodiment of the present invention, an electrochemical reduction apparatus for carbon dioxide can include an pH monitoring and control system, thereby realizing an efficient and stable electrolysis condition of carbon dioxide, and a system for monitoring products and by- But also to the process of concentration with the product produced by reducing the carbon dioxide according to one embodiment of the present application.

1 is a schematic diagram illustrating an intermittent electrochemical reduction system of smart grid-associated carbon dioxide according to one embodiment of the present disclosure.
Figures 2A and 2B are schematic diagrams illustrating electrodes of an intermittent electrochemical reduction system of smart grid-associated carbon dioxide according to one embodiment of the present invention.
FIG. 3 illustrates current efficiency for conversion of carbon dioxide to formate through intermittent drive for 6 hours per day for one month in an intermittent electrochemical reduction system of a smart grid-associated carbon dioxide according to one embodiment of the present application.
Figure 4 shows the current efficiency for conversion of carbon dioxide to the formate according to porosity and current density of the electrode in one embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. It should be understood, however, that the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In the drawings, the same reference numbers are used throughout the specification to refer to the same or like parts.

Throughout this specification, when a part is referred to as being "connected" to another part, it is not limited to a case where it is "directly connected" but also includes the case where it is "electrically connected" do.

Throughout this specification, when a member is " on " another member, it includes not only when the member is in contact with the other member, but also when there is another member between the two members.

Throughout this specification, when an element is referred to as " including " an element, it is understood that the element may include other elements as well, without departing from the other elements unless specifically stated otherwise. The terms " about ", " substantially ", etc. used to the extent that they are used throughout the specification are intended to be taken to mean the approximation of the manufacturing and material tolerances inherent in the stated sense, Accurate or absolute numbers are used to help prevent unauthorized exploitation by unauthorized intruders of the referenced disclosure. The word " step (or step) " or " step " used to the extent that it is used throughout the specification does not mean " step for.

Throughout this specification, the term " combination (s) thereof " included in the expression of the machine form means a mixture or combination of one or more elements selected from the group consisting of the constituents described in the expression of the form of a marker, Quot; means at least one selected from the group consisting of the above-mentioned elements.

Throughout this specification, the description of "A and / or B" means "A or B, or A and B".

Hereinafter, embodiments and examples of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to these embodiments and examples and drawings.

According to an aspect of the present invention, there is provided an electrochemical reduction reactor for carbon dioxide including an oxidation electrode portion and a reduction electrode portion to which carbon dioxide is supplied, and an energy source supply portion for supplying electricity to the electrochemical reduction reactor of the carbon dioxide. Wherein the carbon dioxide is reduced by intermittently applying electricity to the electrochemical reduction reactor. The present invention also provides an intermittent electrochemical reduction system of carbon dioxide.

In one embodiment of the present invention, the carbon dioxide electrochemical reduction reactor may be driven at normal temperature and normal pressure, but may not be limited thereto. Most of the processes, such as the formation of formic acid using existing catalysts, can not be intermittently driven without energy loss due to reactions at high temperatures and pressures. However, in one embodiment of the invention, the intermittent electrochemical reduction system of carbon dioxide comprises a stable electrode and an electrochemical system, whereby the intermittent electrochemical reduction system of carbon dioxide is stable at room temperature and atmospheric pressure Can be driven.

In one embodiment of the present invention, the energy source may be, but is not limited to, electrical energy generated from renewable energy. For example, the renewable energy may include, but is not limited to, energy generated by using wind, tidal, solar, or hydroelectric power. In one embodiment of the present invention, when generating electrical energy from the renewable energy, the renewable energy can utilize an electric energy source of carbon 0, so that a system for reducing carbon dioxide without generation of carbon dioxide Can be configured.

In other embodiments of the present application, the energy source may include, but is not limited to, late-night power generated from thermal power or nuclear power. For example, the above-mentioned thermal power or nuclear power generation accounts for about 50% or more of the power used in our country as an energy source for the low power of our country. Particularly, when electricity is generated using the thermal power, about 0.442 tons of carbon dioxide is generated per 1 MWh of electric power, so that the amount of generated carbon dioxide can also be increased in proportion to the amount used. However, the weight of the thermal power increases, and by converting the idle power into an electrochemically useful material, it has an effect equivalent to storing electricity such as an electric energy storage system. In addition, the idle power can be converted to useful materials more simply because there is no need for a large battery system and transmission system configuration.

In one embodiment of the invention, the renewable energy can be used as the energy source. The renewable energy is to obtain electricity from unconstrained energy generated by using wind, tidal, solar, or hydroelectric power. In the case of the renewable energy, there is a difference in the power generation capability depending on the conditions, so that electricity can be intermittently supplied to the electrochemical reduction reactor of carbon dioxide according to one embodiment of the present invention. For example, when the renewable energy is used, the current density may be lowered or only a part of the entire stacked carbon dioxide reducing system may be driven according to the generated amount of power. So that the carbon dioxide can be electrochemically reduced in proportion to the amount of generated electricity.

In one embodiment of the invention, idle power can be used as the energy source, among electrical energy generated by thermal power or nuclear power. For example, the idle power may be, but is not limited to, midnight power. For example, in our country, the amount of daily electricity supply is about 1,000 kW less than the amount of electricity used in the daytime during the daytime. In this way, the electrochemical reduction of carbon dioxide can be intermittently performed using the system according to one embodiment of the present application utilizing the power of the night time zone in which the power consumption is low, but may not be limited thereto.

In one embodiment of the present invention, the intermittent electrochemical reduction system of carbon dioxide may further include a smart grid server for intermittently applying an energy source to the electrochemical reduction reactor of the carbon dioxide, have. For example, if night power is used among the electric energy generated from thermal power or nuclear power as the energy source, the night-time power may be intermittently applied to the electrochemical reduction system of the carbon dioxide using the Smart Grid server , But may not be limited thereto.

In one embodiment of the present invention, the smart grid server may further include a Smart Grid information collecting unit for collecting power by time slot, but the present invention is not limited thereto. In one embodiment of the present invention, the amount of power supplied per day is greater than the amount of power demanded, but the power usage time is concentrated in the daytime, which may cause power failure due to power supply and demand. Accordingly, it is possible to solve the problem of power failure due to power supply and demand by reducing the carbon dioxide using the nighttime power in the night time zone where the power consumption is low, based on the power amount by the time zone collected through the smart grid information collection unit.

In one embodiment of the present application, the current density applied through the energy source may be less than about 350 mA / cm ² , but may not be limited thereto. For example, the current density may range from about 2 mA / cm < ² > to about 350 mA / cm ² , from about 2 mA / cm ² to about 300 mA / cm ² , from about 2 mA / cm ² to about 250 mA / cm ² , from about 2 mA / cm ² to about 200 mA / cm ² , from about 2 mA / cm ² to about 150 mA / cm ² , from about 2 mA / cm ² to about 100 mA / cm ² , from about 2 mA / cm ² to about 50 mA / cm ² , from about 2 mA / cm ² to about 10 mA / cm ^2, from about 10 mA / cm ² to about 350 mA / cm ^2, from about 50 mA / cm ² to about 350 mA / cm ^2, about 100 mA / cm ² to about 350 mA / cm ^2, about 150 mA / cm ² to about 350 mA / cm ^2, about 200 mA / cm ² to about 350 mA / cm ^2, about 250 mA / cm ² to about 350 mA / cm ^2, or about 300 mA / cm ² to about 350 mA / cm < ² >, but may not be limited thereto. In one embodiment of the present invention, the higher the current density, the more products can be obtained in the same area. Therefore, a compact system can be spatially realized as the current density is higher, but the present invention is not limited thereto.

1, the intermittent electrochemical reduction system of carbon dioxide may include a reduction electrode unit 100, an oxidation electrode unit 110, a reduction electrode unit 100, A first chamber 200 connected to the reducing electrode unit 100 to supply the reducing electrode solution to the reducing electrode unit 100 and a second chamber 200 connected to the reducing electrode unit 100, A second chamber 210 connected to the oxidation electrode unit 110 to supply the oxidation electrode solution to the oxidation electrode unit 110 and a carbon dioxide supply unit 300 connected to the first chamber 200 to supply carbon dioxide to the reduction electrode unit 100 An energy source supply unit 400 connected to the reduction electrode unit 100 and the oxidation electrode unit 110 to apply a voltage or a current to the reduction electrode unit 100 and the oxidation electrode unit 110, , And the first chamber (200), respectively. Ever electrochemical reduction of the product to monitor the resulting product through the monitoring unit 500 and the gas-liquid separation may include a tank 600, but may not be limited thereto.

In an embodiment of the present invention, the electrode portion including the reduction electrode portion 100 and the oxidation electrode portion 110 may have a stacking structure as shown in FIGS. 2A and 2B, But may not be limited thereto.

In an embodiment of the present invention, the intermittent electrochemical reduction system of carbon dioxide may include a smart grid server connected to the energy source supply unit 400 to control intermittently applying an energy source to the electrochemical reduction reactor of the carbon dioxide But is not limited thereto.

For example, as the energy source, renewable energy obtained from a non-constant energy source such as wind power, tidal force, intellect, sunlight, or water can be used, but the present invention is not limited thereto. In the case of the renewable energy, there is a difference in the power generation capability depending on the conditions, so that electricity can be intermittently supplied to the electrochemical reduction reactor of carbon dioxide according to one embodiment of the present invention. For example, when the renewable energy is used, the current density may be lowered or only a part of the entire stacked carbon dioxide reducing system may be driven according to the generated amount of power. So that the carbon dioxide can be electrochemically reduced in proportion to the amount of generated electricity.

In one embodiment of the invention, idle power can be used as the energy source, among electrical energy generated by thermal power or nuclear power. For example, the idle power may be, but is not limited to, midnight power. For example, in our country, the amount of daily electricity supply is about 1,000 kW less than the amount of electricity used in the daytime during the daytime. As described above, the electrochemical reduction of carbon dioxide according to one embodiment of the present invention may be intermittently performed using the electric power of the night time zone in which the electric power consumption is low, but the present invention is not limited thereto.

In one embodiment of the present invention, the electrochemical reduction system of carbon dioxide may further include, but is not limited to, a smart grid server for intermittently applying the energy source. For example, when night power is used among the electric energy generated by thermal power or nuclear power as the energy source, the night-time electric power may be intermittently applied to the electrochemical reduction system of the carbon dioxide using the Smart Grid server , But may not be limited thereto.

In one embodiment of the present invention, the smart grid server may include, but is not limited to, a smart grid information collection unit for collecting power by time slot. In one embodiment of the present invention, when electric energy generated by a thermal power or atomic force is used as an energy source, based on the power amount by time slot collected through the smart grid information collection unit, the carbon dioxide May be applied to the intermittent electrochemical reduction system of the smart grid server.

In one embodiment of the present invention, the higher the current density applied by the smart grid server, the smaller the number of stacking required for the electrode unit, and thus the system can be compact.

In one embodiment of the present invention, the energy source supply unit 400 may include, but not limited to, a constant voltage generator or a constant current generator.

In one embodiment of the present invention, the electrolyte included in the reducing electrode solution contained in the first chamber 200 and the oxidized electrode solution included in the second chamber 210 is K ₂ SO ₄ , KHCO ₃ , But are not limited to, those selected from the group consisting of KCl, KOH, and combinations thereof. In one embodiment of the present invention, when KHCO ₃ is used as the electrolyte, KCl may be used together as an auxiliary electrolyte to increase the conductivity, but may not be limited thereto. For example, with a KHCO ₃ and KCl as the electrolyte, has a stable current efficiency can be switched for a long period of time the carbon dioxide. However, in performing the electrolysis for a long period of time, Cl ^- ions are passed as part oxidizing electrode is chlorine (Cl ₂₎ Lt; / RTI > The generation of chlorine may cause corrosion of the metal or melting of the tube. In one embodiment of the present invention, when only KHCO ₃ is used as the electrolyte, the efficiency can be reduced by about 10% since the conductivity is reduced. In one embodiment of the present invention, when K ₂ SO ₄ is used as the electrolyte, the efficiency is increased by about 5% to about 10% as compared with the use of KHCO ₃ and KCl as an electrolyte, and since chlorine is not generated, And the like can be solved.

In one embodiment of the present invention, the oxidized electrode solution contained in the second chamber 210 may include, but not limited to, a metal hydroxide. The metal hydroxide may be one comprising a hydroxide of an alkali metal, but may include, but is not limited to, selected from the group consisting of KOH, NaOH, LiOH, and combinations thereof.

In one embodiment of the present invention, the reducing electrode unit 100 may include, but is not limited to, tin, mercury, lead, indium, or amalgam electrodes.

In one embodiment of the present invention, the amalgam electrode may be formed of a metal selected from the group consisting of Hg, Ag, In, Sn, Pb, Cu, and combinations thereof on the surface of the base electrode. But may not be limited. In one embodiment of the present invention, the amalgam electrode may include, but is not limited to, a dental amalgam. The dental amalgam can provide a safe amalgam electrode which can ignore toxicity by mercury. For example, the amalgam electrode may comprise from about 35 to about 55 parts by weight of Hg, from about 14 to about 34 parts by weight of Ag, from about 7 to about 17 parts by weight of Sn, and from about 4 to about 24 parts by weight of Cu , But may not be limited thereto. In one embodiment of the invention, the substrate electrode may be porous, plate, rod, or foam, but may not be limited thereto. For example, the porous substrate electrode may include, but is not limited to, a granular aggregate, a surface-treated porous electrode, or a mesh-type metal electrode. In one embodiment of the invention, the substrate electrode may include, but is not limited to, selected from the group consisting of copper, tin, nickel, carbon, free carbon, silver, gold, and combinations thereof.

In an embodiment of the present invention, the first pump 220 connected to the first chamber 200 and the second pump 230 connected to the second chamber 210 may be additionally provided. . The reducing electrode solution and the oxidizing electrode solution may be circulated by the first pump 220 and the second pump 230, but the present invention is not limited thereto.

In an embodiment of the present invention, when electricity is not supplied to the electrochemical reduction reactor, the solution of the reducing electrode part and the solution of the oxidizing electrode part may be circulated in the first chamber 200 and the second chamber 210 ). ≪ / RTI >

In one embodiment of the present invention, the first chamber 200 and the second chamber 210 may further include a pH controller 700 connected to the first chamber 200 and the second chamber 210, but the present invention is not limited thereto. By monitoring and controlling pH through the pH controller 700, it is possible to realize efficient and stable electrolysis conditions. In an embodiment of the present invention, when electrolysis is performed for a long time, the voltage may be abruptly changed if the product is formed over a certain concentration, which may be caused by a rapid change in the pH of the solution of the oxidized electrode portion. The abrupt change of the pH is caused by the breakdown of the buffer system of the solution of the reducing electrode part as the hydrogen ions generated in the oxidizing electrode part solution are excessively supplied to the reducing electrode part solution through the separating membrane. Therefore, when the metal hydroxide is continuously added to the oxidation electrode solution, the generated hydrogen ions are neutralized to maintain the pH and the voltage of the oxidation electrode solution at a constant level to control the amount of excess hydrogen ions , Long-time electrolysis may be possible. Therefore, by monitoring and controlling pH through the pH controller 700, it is possible to realize efficient and stable electrolysis conditions. In one embodiment of the present invention, the electrochemical reduction system of carbon dioxide can be intermittently driven by constructing an electrode and an electrochemical system that stably operate at room temperature and normal pressure.

In one embodiment of the present invention, the product monitoring unit 500 may further include a product sensor 510 for sensing a product, but the present invention is not limited thereto. In one embodiment of the present invention, monitoring the main products and by-products through the product monitoring unit 500 not only can effectively operate the intermittent electrochemical reduction process of carbon dioxide according to the present invention, It is also possible to connect. For example, the main product monitored through the product monitoring unit 500 may be a formate salt, and the by-product may be hydrogen, but it is not limited thereto.

The gas sensor 610 may include a gas sensor 610 connected to the gas-liquid separator 600 to detect gas such as hydrogen or carbon monoxide generated when the carbon dioxide is reduced, The sensor may be connected to the product monitoring unit 500, but may not be limited thereto.

In one embodiment of the invention, the carbon dioxide may be converted into useful compounds such as formic acid, carbon monoxide, or methanol, but the present invention is not limited thereto.

In one embodiment of the present invention, it may include, but is not limited to, reprocessing with electrical energy using a compound such as formic acid, carbon monoxide, or methanol obtained by electrochemically reducing the carbon dioxide as a raw material for a fuel cell .

Hereinafter, embodiments of the present invention will be described in detail. However, the present invention is not limited thereto.

[ Example ]

Intermittent electrochemical reduction of carbon dioxide

In the present embodiment, electrolysis was performed by intermittent driving for 6 hours per day for one month. A constant current of 50 mA / cm < ^-2 & gt ^; was applied to a 9 cm x 9 cm porous electrode using a solution of 0.5 M K ₂ SO ₄ saturated with CO ₂ as an electrolyte. Intermittent driving was performed for 6 hours a day for one month The electrolysis was carried out. As shown in FIG. 3, it was confirmed that stable electrolysis was possible at an efficiency of about 90% or more for one month. As a result, it was confirmed that the electrode was stable even when the carbon dioxide was electrochemically changed through intermittent operation. This shows that the system can be used at night hours with low electricity rates.

Electrode Porosity  And current efficiency according to current density

In order to increase the current density, the porosity of the electrode having the same thickness and the apparent area was first increased to increase the actual surface area. The electrode was subjected to electrolysis by applying a current with an increased current density. As shown in FIG. 4, stable electrolysis was possible at a current density of 100 mA / cm ^{2 for} a 20 ppi (pore per inch) electrode and stable at a current density of 350 mA / cm ^{2 for} a 30 ppi electrode It was confirmed that electrolysis was possible.

In the above example, the possibility of compactness of the intermittent electrochemical reduction system of the smart grid-associated carbon dioxide according to electrode size and current density is shown in Table 1 below.

As shown in Table 1, the higher the current density, the lower the stacking number required for the electrode portion including the reducing electrode portion and the oxidizing electrode portion, and it was possible to obtain more products at the same area. Therefore, it is supposed that the higher the current density according to the present embodiment, the more compact a spatial system can be realized.

It will be understood by those of ordinary skill in the art that the foregoing description of the embodiments is for illustrative purposes and that those skilled in the art can easily modify the invention without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included within the scope of the present invention.

100: reduction electrode portion, 110: oxidation electrode portion
200: first chamber, 210: second chamber, 220: first pump, 230: second pump
300: carbon dioxide supply part
400:
500: product monitoring unit, 510: product sensor
600: gas-liquid separation tank, 610: gas sensor
700: pH adjuster

Claims (10)

A carbon dioxide electrochemical reduction reactor including an oxidation electrode unit and a reduction electrode unit to which carbon dioxide is supplied; And
An energy source supply unit for intermittently supplying electricity to the electrochemical reduction reactor of carbon dioxide,
Lt; / RTI >
Wherein the reducing electrode unit includes an amalgam electrode,
Wherein the amalgam electrode comprises a metal selected from the group consisting of Hg, Ag, In, Sn, Pb, Cu, and combinations thereof on the surface of the base electrode,
The base electrode has a porous or foam shape,
An electrolyte comprising K ₂ SO ₄ is used,
The current density applied by the energy source is 100 mA / cm ² to 350 mA / cm ² ,
Wherein the carbon dioxide is reduced by intermittently applying electricity to the electrochemical reduction reactor of the carbon dioxide.
Intermittent electrochemical reduction system of carbon dioxide.
The method according to claim 1,
Wherein the carbon dioxide electrochemical reduction reactor is operated at normal temperature and atmospheric pressure.
The method according to claim 1,
Wherein the energy source is electrical energy generated from renewable energy. ≪ RTI ID = 0.0 > 8. < / RTI >
The method according to claim 1,
Wherein the energy source comprises atmospheric power or atmospheric power generated from nuclear power.
The method of claim 3,
Wherein the renewable energy comprises energy generated by using wind, tidal, intellectual, solar, or hydroelectric power.
The method according to claim 1,
Further comprising a smart grid server for intermittently applying the energy source. ≪ RTI ID = 0.0 >< / RTI >
The method according to claim 6,
Wherein the smart grid server further comprises a Smart Grid information collection unit for collecting power by time slot.
delete The method according to claim 1,
The intermittent electrochemical reduction system of carbon dioxide includes:
A reduction electrode portion and an oxidation electrode portion separated by the membrane;
A carbon dioxide supply unit for supplying carbon dioxide to the reduction electrode unit;
An energy source supply unit for applying a voltage or an electric current to the reduction electrode unit and the oxidation electrode unit; And
And a product monitoring unit for monitoring the carbon dioxide converted product. ≪ Desc / Clms Page number 21 >
10. The method of claim 9,
Further comprising a Smart Grid server coupled to the energy source supply unit for intermittently applying the energy source to the electrochemical reduction reactor of the carbon dioxide.

Images