Carbon dioxide capture device and carbon dioxide capture method

Abstract

The embodiment of the invention provides a carbon dioxide capture device and a carbon dioxide capture method, and relates to the technical field of carbon dioxide capture. The carbon dioxide capture device comprises a shell and an adsorption assembly, a hydration cavity and an adsorption cavity are formed in the shell and are communicated through a port; an exchange membrane is arranged at the port; the adsorption assembly is arranged in the adsorption cavity; the capture liquid in the hydration cavity can catalyze hydration of carbon dioxide in air to form negative ions, and the negative ions are adsorbed by the adsorption assembly through the exchange membrane, so that capture of carbon dioxide is realized; the negative ions are separated from the adsorption assembly and enter the adsorption cavity to release carbon dioxide. According to the carbon dioxide capturing device provided by the embodiment of the invention, capturing and releasing of carbon dioxide can be realized under relatively low energy consumption, and the problems of high energy consumption and low efficiency in a carbon dioxide capturing and releasing process are solved.

Description

Technical Field

[0001] The present application relates to the technical field of carbon dioxide capture, and in particular to a carbon dioxide capture device and a carbon dioxide capture method. Background Art

[0002] Carbon capture refers to the process of capturing carbon dioxide from industrial production by various means and then storing or utilizing it. In related technologies, carbon dioxide can be captured by catalyzing the hydration of carbon dioxide through bioenzymes to form bicarbonate; then the process is reversed to decompose bicarbonate back into carbon dioxide and water to release carbon dioxide. However, the above carbon dioxide capture and release process consumes a lot of energy and has low efficiency. Summary of the invention

[0003] The embodiments of the present application provide a carbon dioxide capture device and a carbon dioxide capture method to solve the problems of high energy consumption and low efficiency in the carbon dioxide capture and release process.

[0004] In a first aspect, the present application provides a carbon dioxide capture device, the carbon dioxide capture device comprising a shell and an adsorption assembly;

[0005] The shell forms a hydration chamber and an adsorption chamber, and the hydration chamber and the adsorption chamber are connected through a through port;

[0006] The hydration chamber is filled with a capture liquid, and the capture liquid is used to capture carbon dioxide to form negative ions;

[0007] The through port is provided with an exchange membrane, and the exchange membrane is at least used to allow the negative ions to flow from the hydration chamber to the adsorption chamber;

[0008] The adsorption component is arranged in the adsorption chamber, and the adsorption component is at least used for adsorbing the negative ions.

[0009] As an optional implementation, in the carbon dioxide capture device provided in the embodiment of the present application, the adsorption component is configured as a capacitive adsorption component;

[0010] The capacitive adsorption assembly includes a first electrode plate and a second electrode plate;

[0011] When the capacitive adsorption component is in a first state, the first electrode plate is a positive electrode, the second electrode plate is a negative electrode, and the first electrode plate adsorbs the negative ions.

[0012] As an optional implementation, in the carbon dioxide capture device provided in the embodiment of the present application, the adsorption chamber is provided with an electrolyte, and the electrolyte accommodates at least a portion of the first electrode plate and the second electrode plate;

[0013] When the capacitive adsorption component is in the second state, the first electrode plate is a negative electrode, the second electrode plate is a positive electrode, and the negative ions are separated from the first electrode plate and dissolved in the electrolyte.

[0014] As an optional implementation, the carbon dioxide capture device provided in the embodiment of the present application further includes a circulation component, and the circulation component is at least used to drive the electrolyte to flow into or out of the adsorption chamber.

[0015] As an optional implementation, in the carbon dioxide capture device provided in the embodiment of the present application, a partition is provided in the shell, and the outer side of the partition abuts against the inner wall of the shell;

[0016] The adsorption cavity is formed on the inner side of the separator; and the exchange membrane is arranged on the surface of the separator facing the hydration cavity.

[0017] As an optional implementation, in the carbon dioxide capture device provided in the embodiment of the present application, the first electrode plate is arranged on a side of the exchange membrane away from the hydration chamber;

[0018] The second electrode plate is arranged on a side of the separator away from the hydration chamber, and the first electrode plate and the second electrode plate are arranged parallel to each other.

[0019] As an optional implementation, in the carbon dioxide capture device provided in the embodiment of the present application, the shell is provided with an opening, and the capture liquid in the hydration chamber captures carbon dioxide at least through the opening;

[0020] And / or, the carbon dioxide capture device further comprises a gas diffuser, wherein the gas diffuser is at least used to pass carbon dioxide in the air into the hydration chamber.

[0021] In a second aspect, the present application provides a method for capturing carbon dioxide, the method comprising:

[0022] Capturing carbon dioxide by means of a capture liquid in the hydration chamber and hydrating the carbon dioxide to form negative ions;

[0023] Allowing the negative ions to flow from the hydration chamber to the adsorption chamber through the opening;

[0024] The negative ions are adsorbed by the adsorption component of the adsorption chamber to promote the forward reaction of the carbon dioxide hydration process.

[0025] As an optional implementation, in the carbon dioxide capture method provided in the embodiment of the present application, the adsorption component is configured as a capacitive adsorption component, and the capacitive adsorption component includes a first electrode plate and a second electrode plate;

[0026] Adsorbing the negative ions by the adsorption component of the adsorption chamber includes:

[0027] Controlling the capacitive adsorption component to be in a first state, wherein the first electrode plate is a positive electrode, the second electrode plate is a negative electrode, and the negative ions are adsorbed by the first electrode plate;

[0028] The capacitive adsorption component is controlled to be in a second state, the second electrode plate is a positive electrode, and the first electrode plate is a negative electrode, so that the negative ions are separated from the first electrode plate.

[0029] As an optional implementation, in the carbon dioxide capture method provided in an embodiment of the present application, the adsorption chamber is provided with an electrolyte, and the electrolyte accommodates at least a portion of the first electrode plate and the second electrode plate;

[0030] The carbon dioxide capture device further comprises a circulation component, and the method further comprises:

[0031] Obtaining the concentration of the negative ions in the electrolyte;

[0032] When the concentration of the negative ions is higher than a set concentration, the circulation component is controlled to at least drive the electrolyte to flow relative to the adsorption chamber to reduce the concentration of negative ions in the electrolyte in the adsorption chamber.

[0033] The carbon dioxide capture device and carbon dioxide capture method provided in the embodiment of the present application include a shell and an adsorption component; the shell forms a hydration chamber and an adsorption chamber, and the hydration chamber and the adsorption chamber are connected through a through port; the through port is provided with an exchange membrane; the adsorption component is provided in the adsorption chamber; the capture liquid in the hydration chamber can catalyze the hydration of carbon dioxide in the air to form negative ions, and the negative ions are adsorbed by the adsorption component through the exchange membrane, that is, the capture of carbon dioxide is achieved; the negative ions are separated from the adsorption component and enter the adsorption chamber, that is, the release of carbon dioxide is achieved. The carbon dioxide capture device provided in the embodiment of the present application can achieve the capture and release of carbon dioxide at a lower energy consumption, solving the problem of high energy consumption and low efficiency in the process of carbon dioxide capture and release. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0035] Figure 1 A schematic diagram of the structure of a carbon dioxide capture device provided in an embodiment of the present application;

[0036] Figure 2 for Figure 1 Schematic diagram of the internal structure of the carbon dioxide capture device;

[0037] Figure 3A schematic diagram of the principle of a carbon dioxide capture device provided in an embodiment of the present application;

[0038] Figure 4 A schematic flow chart of the carbon dioxide capture method provided in an embodiment of the present application.

[0039] Description of reference numerals:

[0040] 100-shell; 101-hydration chamber; 102-adsorption chamber; 110-body; 111-port; 120-end plate;

[0041] 200-adsorption assembly; 210-first electrode plate; 220-second electrode plate; 221-current collector;

[0042] 300-separator; 310-inlet; 320-outlet;

[0043] 400-Exchange membrane;

[0044] 500-Gas diffuser;

[0045] 800-capture fluid;

[0046] 900-Electrolyte.

[0047] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the embodiments of the present application.

[0049] In the embodiments of the present application, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the embodiments of the present application and their embodiments, and are not intended to limit the indicated devices, elements or components to have specific orientations, or to be constructed and operated in specific orientations. Moreover, in addition to being used to indicate orientations or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present application can be understood according to the specific circumstances.

[0050] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0051] The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of the embodiments of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable where appropriate, so that the embodiments of the embodiments of the present application described herein, for example, can be implemented in an order other than those illustrated or described herein.

[0052] In the embodiments of the present application, words such as "exemplarily" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplarily" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplarily" or "for example" is intended to present related concepts in a specific way.

[0053] As can be seen from the background technology, direct air capture (DAC), also known as carbon capture, is a technology that absorbs carbon dioxide from the air. Carbon capture can separate carbon dioxide from the air and then store or utilize it.

[0054] At present, the commonly used methods for capturing low-concentration carbon dioxide include: liquid absorption method, solid adsorption method, membrane separation technology and bio-enzyme method. Among them, the liquid absorption method mainly uses alkaline solution or amine solution to absorb low-concentration carbon dioxide, and then regenerates it by heating or other means. The whole process consumes a lot of energy; the adsorption material required by the solid adsorption method has high production costs and limited adsorption capacity; membrane separation technology has low absorption efficiency for low-concentration carbon dioxide and is easily blocked by impurities.

[0055] Bioenzymatic capture of carbon dioxide has attracted attention and application due to its high efficiency, mild operating conditions, environmental friendliness, selectivity and renewability. Typically, this method involves using naturally occurring carbonic anhydrase to catalyze the reaction of carbon dioxide and water to form bicarbonate to achieve carbon dioxide capture, and then reversing the process to decompose bicarbonate back into carbon dioxide and water to achieve carbon dioxide release.

[0056] In the process of releasing carbon dioxide by bioenzymatic method, it is usually necessary to change the reaction conditions, such as increasing the temperature to promote the decomposition of bicarbonate into carbon dioxide and water; or changing the pressure conditions of the system to promote the release of carbon dioxide from bicarbonate; or using acidic substances to react with bicarbonate to decompose and release carbon dioxide, etc. These methods of releasing carbon dioxide involve high energy consumption and potential environmental impact in terms of handling by-products and maintaining process efficiency.

[0057] It can be seen that the above-mentioned carbon dioxide capture and release process has high energy consumption and low efficiency.

[0058] Therefore, the present application provides a carbon dioxide capture device and a carbon dioxide capture method, wherein the carbon dioxide capture device includes a shell and an adsorption component; the shell forms a hydration chamber and an adsorption chamber, and the hydration chamber and the adsorption chamber are connected through a through port; the through port is provided with an exchange membrane; the adsorption component is provided in the adsorption chamber; the capture liquid in the hydration chamber can catalyze the hydration of carbon dioxide in the air to form negative ions, and the negative ions are adsorbed by the adsorption component through the exchange membrane, that is, the capture of carbon dioxide is achieved; the negative ions are separated from the adsorption component and enter the adsorption chamber, that is, the release of carbon dioxide is achieved. The carbon dioxide capture device provided in the embodiment of the present application can achieve the capture and release of carbon dioxide at a lower energy consumption, solves the problem of high energy consumption and low efficiency in the process of carbon dioxide capture and release; and does not require the use of a large amount of chemical reagents, reduces the generation and treatment requirements of chemical waste, and reduces the impact on the environment.

[0059] The technical solution of the present application is described in detail below in conjunction with the accompanying drawings and specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments.

[0060] Figure 1A schematic diagram of the structure of a carbon dioxide capture device provided in an embodiment of the present application; Figure 2 for Figure 1 Schematic diagram of the internal structure of the carbon dioxide capture device; Figure 3 This is a schematic diagram of the principle of the carbon dioxide capture device provided in an embodiment of the present application.

[0061] Combination Figures 1 to 3 As shown, on the one hand, an embodiment of the present application provides a carbon dioxide capture device, which includes a shell 100 and an adsorption component 200; the shell 100 forms a hydration chamber 101 and an adsorption chamber 102, and the hydration chamber 101 and the adsorption chamber 102 are connected through a through port 111; the hydration chamber 101 is filled with a capture liquid 800, and the capture liquid 800 is at least used to capture carbon dioxide to form negative ions; the through port 111 is provided with an exchange membrane 400, and the exchange membrane 400 is at least used to allow negative ions to flow from the hydration chamber 101 to the adsorption chamber 102; the adsorption component 200 is provided in the adsorption chamber 102, and the adsorption component 200 is at least used to adsorb negative ions.

[0062] The captured liquid 800 is a carbonic anhydride bacteria liquid. Carbonic anhydride bacteria can produce carbonic anhydrase, which can catalyze the hydration of carbon dioxide and catalyze the carbon dioxide in the air to form bicarbonate anions (HCO3 - ), these bicarbonate anions are adsorbed by the adsorption assembly 200, which is the capture of carbon dioxide. Under certain conditions, the bicarbonate anions adsorbed by the adsorption assembly 200 are separated from the adsorption assembly 200 and enter the adsorption chamber 102, which is the release of carbon dioxide.

[0063] The carbon dioxide capture device provided in the embodiment of the present application integrates the capture and release functions of low-concentration carbon dioxide, which helps to accurately control the capture and release process of carbon dioxide; and the carbon dioxide capture and release process can be carried out at normal temperature and pressure, without the need to apply high temperature or high pressure reaction conditions, and without the need to use acidic substances to react with bicarbonate. It has the characteristics of low energy consumption and high efficiency, and also reduces the generation and treatment requirements of chemical waste, reducing the impact on the environment.

[0064] In some embodiments, the adsorption component 200 is configured as a capacitive adsorption component; the capacitive adsorption component includes a first electrode 210 and a second electrode 220; when the capacitive adsorption component is in a first state, the first electrode 210 is a positive electrode, the second electrode 220 is a negative electrode, and the first electrode 210 adsorbs negative ions.

[0065] It can be understood that the first electrode plate 210 and the second electrode plate 220 can form a capacitor. By applying a voltage to the first electrode plate 210 and the second electrode plate 220, an electric field can be generated between the first electrode plate 210 and the second electrode plate 220 to adsorb negative ions.

[0066] In the first state, the first electrode 210 of the capacitive adsorption component is positively charged and the second electrode 220 is negatively charged. The positively charged first electrode 210 will attract the negative bicarbonate ions generated in the hydration chamber 101, so that the negative bicarbonate ions gather on the first electrode 210, thereby achieving the capture of carbon dioxide.

[0067] In some embodiments, the adsorption chamber 102 is provided with an electrolyte 900, and the electrolyte 900 accommodates at least a portion of the first electrode plate 210 and the second electrode plate 220; when the capacitive adsorption component is in the second state, the first electrode plate 210 is a negative electrode, the second electrode plate 220 is a positive electrode, and the negative ions are separated from the first electrode plate 210 and dissolved in the electrolyte 900.

[0068] For example, the electrolyte 900 may be a sodium sulfate solution or a sodium chloride solution, etc., which can conduct current under the action of an electric field. The presence of the electrolyte 900 provides a medium for negative ion conduction, so that the electric field can effectively act between the plates and promote the movement and adsorption of negative ions.

[0069] In the second state, the polarity of the first electrode 210 and the second electrode 220 changes, the second electrode 220 of the capacitive adsorption component is positively charged, and the first electrode 210 is negatively charged, then the direction of the electric force on the negative ions is also changed, and the negative ions will detach from the first electrode 210 and dissolve into the electrolyte 900, thereby releasing carbon dioxide and restoring the adsorption capacity of the first electrode 210.

[0070] The capacitive adsorption component utilizes the adjustability of the electric field to achieve efficient adsorption and regeneration processes in the carbon dioxide capture device. The use of electrolyte 900 and the mechanism of polarity reversal enable the carbon dioxide capture device to operate cyclically at lower energy consumption and achieve precise control of the adsorption process, thereby improving the capture efficiency and the economy and sustainability of the carbon dioxide capture device.

[0071] It can be seen that the process of promoting carbon dioxide hydration by carbonic anhydride bacteria and absorbing bicarbonate anions produced by carbon dioxide hydration using a capacitive adsorption component has low requirements for the reaction environment and can be carried out at normal temperature and pressure without the use of chemical reagents, thereby achieving low-energy consumption and high-efficiency direct air capture of carbon dioxide.

[0072] In some embodiments, the carbon dioxide capture device further includes a circulation component, which is at least used to drive the electrolyte 900 to flow into or out of the adsorption chamber 102 .

[0073] Exemplarily, the circulation component may be a circulation pump to circulate the electrolyte 900 into the adsorption chamber 102 .

[0074] By providing a circulation component, the electrolyte 900 can flow in the adsorption chamber 102, which helps maintain a uniform ion concentration and temperature distribution, achieves the renewal and reuse of the electrolyte 900, prevents local oversaturation or ion depletion, and ensures the overall efficiency of the carbon dioxide capture device.

[0075] By controlling the flow of the electrolyte 900, not only the heat generated during the adsorption process can be taken away, but also ions can be carried into or out of the adsorption chamber 102, thereby enhancing the ion exchange and mass transfer efficiency, so as to achieve dynamic regulation of the chemical environment in the adsorption chamber 102 and optimize the ion adsorption and release process.

[0076] In addition, the flowing electrolyte 900 can also help remove impurities that may be accumulated in the adsorption chamber 102, thereby improving the reliability and life of the carbon dioxide capture device.

[0077] In some embodiments, a separator 300 is disposed in the shell 100 , and the outer side of the separator 300 abuts against the inner wall of the shell 100 ; the inner side of the separator 300 forms an adsorption chamber 102 ; and an exchange membrane 400 is disposed on the surface of the separator 300 facing the hydration chamber 101 .

[0078] The shell 100 includes a body 110 and an end plate 120 . A hydration chamber 101 is formed inside the body 110 . A through opening 111 is opened on the body 110 . The partition 300 is arranged on one side of the body 110 where the through opening 111 is opened.

[0079] The second electrode plate 220 is disposed on the current collector 221 . The current collector 221 abuts against the side of the separator 300 away from the body 110 , and the end plate 120 is connected to the side of the current collector 221 away from the separator 300 ; the separator 300 , the body 110 , and the end plate 120 are jointly arranged to form an adsorption chamber 102 .

[0080] The second electrode plate 220 is attached to a surface of the current collector 221 facing the separator 300 , and the second electrode plate 220 is disposed opposite to the first electrode plate 210 .

[0081] For example, the housing 100 can be made of acrylic material. Acrylic material has the characteristics of high transparency, easy molding, toughness and durability, and good insulation, and is widely used in the protection of electronic components, capacitor housings and other occasions, and will not interfere with or affect the current.

[0082] The exchange membrane 400 is an anion exchange membrane 400. The anion exchange membrane 400 has a selective permeability to anions, and is also called an ion selective permeability membrane.

[0083] The exchange membrane 400 covers the opening 111 , allowing only bicarbonate anions to enter the adsorption chamber 102 through the opening 111 , while the capture liquid 800 in the hydration chamber 101 cannot enter the adsorption chamber 102 , and the electrolyte 900 in the adsorption chamber 102 cannot enter the hydration chamber 101 .

[0084] The separator 300 is also provided with an inlet 310 and an outlet 320 both connected to the adsorption chamber 102 . Under the action of the circulation component, the electrolyte 900 can enter the adsorption chamber 102 through the inlet 310 and can flow out of the adsorption chamber 102 through the outlet 320 .

[0085] Exemplarily, the current collector 221 may be a titanium plate. The titanium plate has good electrical conductivity and can effectively conduct current, which facilitates efficient current transfer between the second electrode plate 220 and the external power source; and the titanium plate also has excellent corrosion resistance, is in direct contact with the electrolyte 900, can resist oxidation and chemical corrosion, and ensure the durability of the capacitive adsorption component; in addition, the titanium plate has high mechanical strength, can maintain the shape and integrity of the second electrode plate 220, and also helps to improve the structural stability of the capacitive adsorption component.

[0086] In some embodiments, the first electrode plate 210 is disposed on the side of the exchange membrane 400 away from the hydration chamber 101; the second electrode plate 220 is disposed on the side of the separator 300 away from the hydration chamber 101, and the first electrode plate 210 and the second electrode plate 220 are disposed parallel to each other.

[0087] It is understandable that carbonic anhydrase bacteria, as a kind of bacteria, need to rely on membrane potential to maintain the exchange of substances and energy transfer inside and outside its cells. The voltage applied to the capacitive adsorption component may interfere with the membrane potential of the bacteria and affect the growth and metabolism of the cells.

[0088] By arranging the first electrode 210 on the side of the exchange membrane 400 away from the hydration chamber 101, it is equivalent to arranging the hydration chamber 101 and the capture liquid 800 therein outside the capacitive adsorption component. The capacitive adsorption component does not directly contact the hydration chamber 101, and the carbonic anhydrase bacteria in the hydration chamber 101 and the carbonic anhydrase produced by them are not directly exposed to the electric field of the capacitive adsorption component. Therefore, they will not be directly affected by the redox reaction or local changes on the surface of the first electrode 210 and the second electrode 220, thereby reducing the interference of the electric field on the activity of carbonic anhydrase or the survival of carbonic anhydrase bacteria, thereby reducing the risk of inactivation of carbonic anhydrase or death of carbonic anhydrase bacteria.

[0089] The negative ions generated in the hydration chamber 101 can leave the hydration chamber 101 through the exchange membrane 400. The positive charge of the first electrode 210 can quickly attract and capture these negative ions, reducing the diffusion distance of the negative ions in the adsorption chamber 102 and improving the adsorption efficiency.

[0090] The second electrode plate 220 is located on the other side of the separator 300 and is parallel to and opposite to the first electrode plate 210, forming a parallel electric field structure, ensuring the uniformity and strength of the electric field, making the movement of negative ions in the adsorption chamber 102 more orderly and efficient.

[0091] In some embodiments, the housing 100 is provided with an opening, and the capture liquid 800 in the hydration chamber 101 captures carbon dioxide at least through the opening.

[0092] It can be understood that an opening is provided on the shell 100, and the hydration chamber 101 can be connected to the external environment through the opening, so that the capture liquid 800 can directly contact the carbon dioxide in the air, increasing the contact area and time between the carbon dioxide and the capture liquid 800, and improving the hydration reaction rate of the carbon dioxide, thereby enhancing the capture effect of the carbon dioxide.

[0093] In some other embodiments, the carbon dioxide capture device further includes a gas diffuser 500 , and the gas diffuser 500 is at least used to pass carbon dioxide in the air into the hydration chamber 101 .

[0094] The gas diffuser 500 is disposed in the hydration chamber 101 . The gas diffuser 500 can disperse the air into uniform small bubbles, so that the carbon dioxide therein can be more easily absorbed by the capture liquid 800 .

[0095] Specifically, the carbon dioxide capture device provided in the embodiment of the present application optimizes the contact conditions between carbon dioxide and the capture liquid 800, and can more effectively capture carbon dioxide from the air.

[0096] Figure 4 A schematic diagram of a process for capturing carbon dioxide provided in an embodiment of the present application. Figure 4 As shown, another aspect of the present application embodiment provides a method for capturing carbon dioxide, the method for capturing carbon dioxide comprising the following steps:

[0097] S101, capturing carbon dioxide through the capture liquid 800 in the hydration chamber 101, and hydrating the carbon dioxide to form negative ions;

[0098] S102, allowing negative ions to flow from the hydration chamber 101 to the adsorption chamber 102 through the opening 111;

[0099] S103 , the adsorption component 200 of the adsorption chamber 102 adsorbs negative ions to promote a positive reaction in the carbon dioxide hydration process.

[0100] The capture liquid 800 may be a carbonic anhydride bacteria liquid.

[0101] For example, soil samples can be selected from soils rich in carbonate minerals such as karst landforms, stone forest landforms and saline-alkali soils, and then the soil samples can be cultured in a complete nutrient medium to separate and purify the carbonic anhydride bacteria strains.

[0102] Since carbonic anhydrase not only has the activity of catalyzing the reaction of carbon dioxide and water to generate carbonic acid, but also can catalyze the hydrolysis reaction of some ester compounds, carbonic anhydrase of different concentrations reacts with p-nitrophenyl acetate to generate p-nitrophenol acetate, making the absorbance of the solution different, thus reflecting different carbonic anhydrase activities. Therefore, the cultured carbonic anhydrase bacteria solution can be mixed with the p-nitrophenyl acetate solution, and the absorbance after the reaction can be measured by an ultraviolet spectrophotometer to evaluate the carbonic anhydrase production ability of carbonic anhydrase bacteria, so as to screen out carbonic anhydrase bacteria that efficiently produce carbonic anhydrase.

[0103] The carbonic anhydride bacteria screened need to be cultured. Specifically, the carbonic anhydride-producing bacteria are inoculated on a solid culture medium and placed in a 30°C constant temperature incubator for 24 to 48 hours; then transferred to a liquid culture medium and cultured on a shaking table at a temperature of 30°C and a shaking speed of 125 r / min; while the culture is being cultured on the shaking table, the absorbance of the bacterial solution at 600 nm is detected using an ultraviolet spectrophotometer, and the OD 600 Reached about 0.4, that is, the concentration of carbonic anhydride bacteria reached 7×10 8 ~9×10 10 When the carbonic anhydride bacteria liquid is transferred to the hydration chamber 101 for continued cultivation, until the carbonic anhydride bacteria grow to the logarithmic phase, air can be introduced into the hydration chamber 101 to capture low-concentration carbon dioxide in the air and generate bicarbonate negative ions.

[0104] It should be noted that the cultivation process of carbonic anhydrase bacteria is carried out in a highly clean environment, such as a clean bench.

[0105] For example, the solid culture medium and the liquid culture medium may be beef extract peptone culture medium, LB (Luria-Bertani) culture medium, etc.; the culture vessel for the solid culture medium may be a flat culture dish, and the culture vessel for the liquid culture medium may be a triangular culture flask.

[0106] Of course, the solid culture medium, liquid culture medium and culture vessel in the embodiments of the present application may also be other conventional culture medium and culture vessel, and the embodiments of the present application do not impose any limitation on this.

[0107] In some embodiments, the adsorption component 200 is configured as a capacitive adsorption component, which includes a first electrode 210 and a second electrode 220; the adsorption component 200 of the adsorption chamber 102 adsorbs negative ions, including: controlling the capacitive adsorption component to be in a first state, the first electrode 210 is a positive electrode, the second electrode 220 is a negative electrode, and the negative ions are adsorbed through the first electrode 210; controlling the capacitive adsorption component to be in a second state, the second electrode 220 is a positive electrode, the first electrode 210 is a negative electrode, so that the negative ions are separated from the first electrode 210.

[0108] The first electrode plate 210 and the second electrode plate 220 may be made of activated carbon electrodes. Activated carbon is an electrode material with good conductivity and low cost, which can provide a large number of adsorption sites for negative ions. The first electrode plate 210 and the second electrode plate 220 may also be made of materials such as carbon nanotubes and graphene, which are not limited in the present embodiment.

[0109] Specifically, activated carbon, superconductive carbon black and 60% polytetrafluoroethylene are mixed evenly in a ratio of 8:1:1, a small amount of anhydrous ethanol is added, and the mixture is continuously stirred until a lump paste is formed; then the lump paste is pressed into a film using a laminating machine, and hot-pressed on a titanium mesh at high temperature to prepare a pair of composite electrode sheets as the first electrode plate 210 and the second electrode plate 220 in the capacitive adsorption assembly. The density of the composite electrode sheet is 7.2-8.0 mg·cm -2 .

[0110] The first electrode plate 210 and the second electrode plate 220 are distributed on opposite sides of the separator 300 , and a glass fiber separator can be laid between the first electrode plate 210 and the second electrode plate 220 , and the glass fiber separator can control the electrode distance between the first electrode plate 210 and the second electrode plate 220 to prevent short circuit.

[0111] In a specific implementation, in the first state, the first electrode plate 210 of the capacitive adsorption component is positively charged, and the second electrode plate 220 is negatively charged, and the first electrode plate 210 can selectively adsorb bicarbonate negative ions.

[0112] In the second state, the polarity of the electrode plate is opposite to that in the first state, the first electrode plate 210 is the negative electrode, and the second electrode plate 220 is the positive electrode. By changing the polarity, the bicarbonate anions adsorbed on the first electrode plate 210 are pushed away and dissolved into the electrolyte 900. This process not only releases carbon dioxide, but also restores the adsorption capacity of the first electrode plate 210.

[0113] It can be seen that the capacitive adsorption component utilizes the adjustability of the electric field to provide an efficient and controllable adsorption and regeneration mechanism for the carbon dioxide capture and release process, which can achieve precise control of the carbon dioxide capture and release process, improve capture efficiency and reduce energy consumption.

[0114] In some embodiments, the adsorption chamber 102 is provided with an electrolyte 900, and the electrolyte 900 accommodates at least a portion of the first electrode plate 210 and the second electrode plate 220; the carbon dioxide capture device also includes a circulation component, and the method also includes: obtaining the concentration of negative ions in the electrolyte 900; when the concentration of negative ions is higher than the set concentration, controlling the circulation component to at least drive the electrolyte 900 to flow relative to the adsorption chamber 102 to reduce the negative ion concentration of the electrolyte 900 in the adsorption chamber 102.

[0115] It can be understood that the electrolyte 900, as an ion-conducting medium, can conduct current under the action of the electric field, ensuring that the electric field can effectively act between the first electrode plate 210 and the second electrode plate 220 to promote the movement and adsorption of negative ions.

[0116] When the concentration of negative ions is too high, the adsorption efficiency of negative ions may decrease or regeneration may be difficult. By providing a circulation component in the carbon dioxide capture device, the electrolyte 900 can flow in the adsorption chamber 102, thereby realizing the renewal and reuse of the electrolyte 900. By flowing the electrolyte 900, excessive negative ions can be taken away, which helps maintain a uniform ion concentration and temperature distribution and prevent local oversaturation or ion depletion.

[0117] Specifically, the carbon dioxide capture method provided in the embodiment of the present application is as follows:

[0118] Air is introduced into the hydration chamber 101 , and the capture liquid 800 in the hydration chamber 101 can promote the hydration of carbon dioxide to generate negative ions.

[0119] A first working voltage is applied to the capacitive adsorption component, and the electrolyte 900 is controlled to circulate in the adsorption chamber 102 for a preset time. During this process, the first electrode 210 is positive and the second electrode 220 is negative. The first electrode 210 can adsorb negative ions to achieve the capture of carbon dioxide.

[0120] A second working voltage is applied to the capacitive adsorption component to change the polarity of the first electrode plate 210 and the second electrode plate 220 to perform a negative ion desorption process; during the desorption process, the capacitive adsorption component desorbs the negative ions on the first electrode plate 210 into the electrolyte 900 to release carbon dioxide.

[0121] It should be noted that the carbonic acid bacteria liquid can be filled into the hydration chamber 101 as the capture liquid 800; or the carbonic acid bacteria liquid can be resuspended in a phosphate buffer after centrifugation and then filled into the hydration chamber 101 as the capture liquid 800.

[0122] The electrolyte 900 may be a 0.01 M sodium sulfate solution or a 0.01 M sodium chloride solution.

[0123] The preset duration can be 20 minutes to 50 minutes.

[0124] The first operating voltage may be 1.0V to 2.0V; the second operating voltage may be -2.0V to 0V.

[0125] In summary, the carbon dioxide capture device provided in the embodiment of the present application is filled with a capture liquid 800 in the hydration chamber 101 as a biocatalytic unit, and the biocatalytic unit is arranged outside the capacitive adsorption component, and the biocatalytic unit promotes the hydration of carbon dioxide to generate bicarbonate anions (HCO3 - ), and then using the capacitive adsorption component to adsorb bicarbonate anions, the direct capture of low-concentration carbon dioxide in the air is achieved; and then by changing the voltage polarity applied to the adsorption component 200 or reducing the voltage, the bicarbonate anions are released, and the release of carbon dioxide is achieved. The carbon dioxide capture device provided in the embodiment of the present application can achieve the capture and release of carbon dioxide at a relatively low energy consumption, and solves the problem of high energy consumption and low efficiency in the process of carbon dioxide capture and release.

[0126] Finally, it should be noted that those skilled in the art will easily think of other implementations of the embodiments of the present application after considering the specification and practicing the application disclosed herein. The embodiments of the present application are intended to cover any variations, uses or adaptive changes of the embodiments of the present application, which follow the general principles of the embodiments of the present application and include common knowledge or customary technical means in the art that are not disclosed in the embodiments of the present application. The specification and embodiments are only to be regarded as exemplary, and the true scope and spirit of the embodiments of the present application are indicated by the following claims.

[0127] It should be understood that the embodiments of the present application are not limited to the precise structures described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the embodiments of the present application is limited only by the appended claims.

Claims

1. A carbon dioxide capture device, characterized in that: It comprises a shell (100) and an adsorption component (200); The housing (100) forms a hydration chamber (101) and an adsorption chamber (102), and the hydration chamber (101) and the adsorption chamber (102) are connected via a through port (111); The hydration chamber (101) is filled with a capture liquid (800), and the capture liquid (800) is used to capture carbon dioxide to form negative ions. The through port (111) is provided with an exchange membrane (400), and the exchange membrane (400) is at least used to allow the negative ions to flow from the hydration chamber (101) to the adsorption chamber (102); The adsorption component (200) is arranged in the adsorption chamber (102), and the adsorption component (200) is at least used to adsorb the negative ions.

2. The carbon dioxide capture device according to claim 1, characterized in that The adsorption component (200) is configured as a capacitive adsorption component; The capacitive adsorption component comprises a first electrode plate (210) and a second electrode plate (220); When the capacitive adsorption component is in a first state, the first electrode plate (210) is a positive electrode, the second electrode plate (220) is a negative electrode, and the first electrode plate (210) adsorbs the negative ions.

3. The carbon dioxide capture device according to claim 2, characterized in that The adsorption chamber (102) is provided with an electrolyte (900), and the electrolyte (900) accommodates at least a portion of the first electrode plate (210) and the second electrode plate (220); When the capacitive adsorption component is in the second state, the first electrode plate (210) is a negative electrode, the second electrode plate (220) is a positive electrode, and the negative ions are separated from the first electrode plate (210) and dissolved in the electrolyte (900).

4. The carbon dioxide capture device according to claim 3, characterized in that The carbon dioxide capture device further comprises a circulation component, which is at least used to drive the electrolyte (900) to flow into or out of the adsorption chamber (102).

5. The carbon dioxide capture device according to any one of claims 2 to 4, characterized in that: A partition (300) is provided in the shell (100), and the outer side of the partition (300) abuts against the inner wall of the shell (100); The adsorption chamber (102) is formed on the inner side of the separator (300); and the exchange membrane (400) is arranged on the surface of the separator (300) facing the hydration chamber (101).

6. The carbon dioxide capture device according to claim 5, characterized in that The first electrode plate (210) is arranged on a side of the exchange membrane (400) away from the hydration chamber (101); The second electrode plate (220) is arranged on a side of the separator (300) away from the hydration chamber (101), and the first electrode plate (210) and the second electrode plate (220) are arranged parallel to each other.

7. The carbon dioxide capture device according to claim 1, characterized in that The housing (100) is provided with an opening, and the capture liquid (800) in the hydration chamber (101) captures carbon dioxide at least through the opening; And / or, the carbon dioxide capture device further comprises a gas diffuser (500), wherein the gas diffuser (500) is at least used to pass carbon dioxide in the air into the hydration chamber (101).

8. A method for capturing carbon dioxide, characterized in that: include: Capturing carbon dioxide through a capture liquid (800) in a hydration chamber (101), and hydrating the carbon dioxide to form negative ions; Allowing the negative ions to flow from the hydration chamber (101) to the adsorption chamber (102) through the opening (111); The negative ions are adsorbed by the adsorption component (200) of the adsorption chamber (102) to promote the forward reaction of the carbon dioxide hydration process.

9. The carbon dioxide capture method according to claim 8, characterized in that: The adsorption assembly (200) is configured as a capacitive adsorption assembly, and the capacitive adsorption assembly comprises a first electrode plate (210) and a second electrode plate (220); Adsorbing the negative ions through the adsorption component (200) of the adsorption chamber (102) comprises: Controlling the capacitive adsorption component to be in a first state, the first electrode plate (210) being a positive electrode, the second electrode plate (220) being a negative electrode, and the negative ions being adsorbed by the first electrode plate (210); The capacitive adsorption component is controlled to be in a second state, the second electrode plate (220) is a positive electrode, and the first electrode plate (210) is a negative electrode, so that the negative ions are separated from the first electrode plate (210).

10. The carbon dioxide capture method according to claim 9, characterized in that: The adsorption chamber (102) is provided with an electrolyte (900), and the electrolyte (900) accommodates at least a portion of the first electrode plate (210) and the second electrode plate (220); The carbon dioxide capture device further comprises a circulation component, and the method further comprises: Obtaining the concentration of the negative ions in the electrolyte (900); When the concentration of the negative ions is higher than a set concentration, the circulation component is controlled to at least drive the electrolyte (900) to flow relative to the adsorption chamber (102) to reduce the negative ion concentration of the electrolyte (900) in the adsorption chamber (102).

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