Carbon dioxide capture device and carbon dioxide capture method

Abstract

This application provides a carbon dioxide capture device and method, relating to the field of carbon dioxide capture technology. The carbon dioxide capture device includes a housing and an adsorption assembly; the housing forms a hydration chamber and an adsorption chamber, which are connected by a port; an exchange membrane is disposed at the port; the adsorption assembly is disposed in the adsorption chamber; the capture liquid in the hydration chamber catalyzes the hydration of carbon dioxide in the air to form negative ions, which are then adsorbed by the adsorption assembly through the exchange membrane, thus achieving carbon dioxide capture; the negative ions detach from the adsorption assembly and enter the adsorption chamber, thus achieving carbon dioxide release. The carbon dioxide capture device provided by this application can achieve carbon dioxide capture and release with low energy consumption, solving the problems of high energy consumption and low efficiency in the carbon dioxide capture and release process.

Description

Technical Field

[0001] This application relates to the field of carbon dioxide capture technology, and in particular to a carbon dioxide capture device and a carbon dioxide capture method. Background Technology

[0002] Carbon capture refers to the process of capturing, storing, or utilizing carbon dioxide from industrial production using various methods. One related technology involves using enzymatic methods to catalyze the hydration of carbon dioxide to form bicarbonate, thus capturing the carbon dioxide; then reversing this process allows the bicarbonate to decompose back into carbon dioxide and water, releasing the carbon dioxide. However, this carbon dioxide capture and release process is energy-intensive and inefficient. Summary of the Invention

[0003] This application provides 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, this application provides a carbon dioxide capture device, which includes a housing and an adsorption assembly;

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

[0006] The hydration chamber is filled with a capturing liquid, which is used at least to capture carbon dioxide to form negative ions;

[0007] The inlet is provided with an exchange membrane, which is at least used to allow the negative ions to flow from the hydration chamber to the adsorption chamber.

[0008] The adsorption component is disposed in the adsorption chamber, and the adsorption component is used to adsorb at least the negative ions.

[0009] As an optional implementation, the carbon dioxide capture device provided in this application embodiment has the adsorption component 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 the first state, the first electrode plate is the positive electrode and the second electrode plate is the negative electrode, and the first electrode plate adsorbs the negative ions.

[0012] As an optional implementation, the carbon dioxide capture device provided in this application embodiment has an adsorption chamber provided with an electrolyte, the electrolyte containing 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 the negative electrode and the second electrode plate is the positive electrode. The negative ions detach from the first electrode plate and dissolve in the electrolyte.

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

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

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

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

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

[0019] As an optional implementation, the carbon dioxide capture device provided in this application embodiment has an opening in the housing, 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 includes a gas diffuser, which is at least used to introduce carbon dioxide from the air into the hydration chamber.

[0021] Secondly, this application provides a carbon dioxide capture method, the carbon dioxide capture method comprising:

[0022] Carbon dioxide is captured by the capture liquid in the hydration chamber and then hydrated to form negative ions.

[0023] The negative ions are allowed to flow from the hydration chamber into the adsorption chamber through the opening;

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

[0025] As an optional implementation, the carbon dioxide capture method provided in this application embodiment uses a capacitive adsorption component, which includes a first electrode plate and a second electrode plate.

[0026] The adsorption assembly through the adsorption chamber adsorbs the negative ions, including:

[0027] The capacitive adsorption component is controlled to be in a first state, with the first electrode plate being the positive electrode and the second electrode plate being the negative electrode, and the negative ions are adsorbed through the first electrode plate;

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

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

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

[0031] To obtain the concentration of the negative ions in the electrolyte;

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

[0033] The carbon dioxide capture device and method provided in this application include a housing and an adsorption component. The housing forms a hydration chamber and an adsorption chamber, which are connected by a port. An exchange membrane is provided at the port. The adsorption component is disposed in the adsorption chamber. The capture liquid in the hydration chamber catalyzes the hydration of carbon dioxide in the air to form negative ions. These negative ions are adsorbed by the adsorption component after passing through the exchange membrane, thus achieving carbon dioxide capture. The negative ions detach from the adsorption component and enter the adsorption chamber, thus achieving carbon dioxide release. The carbon dioxide capture device provided in this application can achieve carbon dioxide capture and release with low energy consumption, solving the problems of high energy consumption and low efficiency in the carbon dioxide capture and release process. Attached Figure Description

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

[0035] Figure 1 This is a schematic diagram of the structure of the carbon dioxide capture device provided in the embodiments of this application;

[0036] Figure 2 for Figure 1 A schematic diagram of the internal structure of a carbon dioxide capture device.

[0037] Figure 3This is a schematic diagram of the carbon dioxide capture device provided in the embodiments of this application;

[0038] Figure 4 This is a schematic flowchart of the carbon dioxide capture method provided in an embodiment of this application.

[0039] Explanation of reference numerals in the attached figures:

[0040] 100 - Shell; 101 - Hydration chamber; 102 - Adsorption chamber; 110 - Body; 111 - Port; 120 - End plate;

[0041] 200 - Adsorption component; 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 accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the embodiments of this application.

[0049] In the embodiments of this application, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are mainly for better describing the embodiments of this application and their implementations, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may also be used in some cases to indicate a certain dependency or connection relationship. For those skilled in the art, the specific meaning of these terms in the embodiments of this application can be understood according to the specific circumstances.

[0050] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" 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, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

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

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

[0053] As the background technology explains, Direct Air Capture (DAC), or 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] Currently, common methods for capturing low-concentration carbon dioxide include liquid absorption, solid adsorption, membrane separation technology, and bioenzymatic methods. Among these, liquid absorption mainly uses alkaline or amine solutions to absorb low-concentration carbon dioxide, and then regenerates it through heating or other methods, resulting in high energy consumption throughout the process; solid adsorption requires high-cost adsorption materials and has limited adsorption capacity; membrane separation technology has low absorption efficiency for low-concentration carbon dioxide and is easily clogged by impurities.

[0055] Bioenzymatic carbon dioxide capture 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 produce bicarbonate, thereby capturing carbon dioxide. This process is then reversed to decompose the bicarbonate back into carbon dioxide and water, releasing the carbon dioxide.

[0056] In the process of releasing carbon dioxide using enzymatic methods, it is usually necessary to change the reaction conditions. For example, increasing the temperature can promote the decomposition of bicarbonate into carbon dioxide and water; changing the system pressure can also induce the release of carbon dioxide from bicarbonate; or using acidic substances to react with bicarbonate, causing it to decompose and release carbon dioxide. These methods of releasing carbon dioxide all involve high energy consumption and potential environmental impacts in terms of handling byproducts and maintaining process efficiency.

[0057] It is evident that the above-mentioned carbon dioxide capture and release process is energy-intensive and inefficient.

[0058] Therefore, this application provides a carbon dioxide capture device and a carbon dioxide capture method. The carbon dioxide capture device includes a housing and an adsorption component. The housing forms a hydration chamber and an adsorption chamber, which are connected by a port. An exchange membrane is provided at the port. The adsorption component is disposed in the adsorption chamber. The capture liquid in the hydration chamber catalyzes the hydration of carbon dioxide in the air to form negative ions. These negative ions are adsorbed by the adsorption component after passing through the exchange membrane, thus achieving carbon dioxide capture. The negative ions detach from the adsorption component and enter the adsorption chamber, thus achieving carbon dioxide release. The carbon dioxide capture device provided in this application can achieve carbon dioxide capture and release with low energy consumption, solving the problems of high energy consumption and low efficiency in the carbon dioxide capture and release process. Furthermore, it does not require the use of large amounts of chemical reagents, reducing the generation and treatment needs of chemical waste and lowering the environmental impact.

[0059] The technical solution of this application will be described in detail below with reference to 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 described again in some embodiments.

[0060] Figure 1This is a schematic diagram of the structure of the carbon dioxide capture device provided in the embodiments of this application; Figure 2 for Figure 1 A schematic diagram of the internal structure of a carbon dioxide capture device. Figure 3 This is a schematic diagram of the carbon dioxide capture device provided in the embodiments of this application.

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

[0062] The capture solution 800 is a culture of carbonic anhydride bacteria. Carbonic anhydride bacteria can produce carbonic anhydrase, which catalyzes the hydration of carbon dioxide, forming bicarbonate anions (HCO3-) from atmospheric carbon dioxide. - These bicarbonate anions are adsorbed by the adsorption component 200, which is the capture of carbon dioxide. Under certain conditions, the bicarbonate anions adsorbed by the adsorption component 200 detach from the adsorption component 200 and enter the adsorption chamber 102, which is the release of carbon dioxide.

[0063] The carbon dioxide capture device provided in this application combines the functions of capturing and releasing low-concentration carbon dioxide, which helps to precisely control the capture and release process of carbon dioxide. Furthermore, the capture and release process of carbon dioxide can be carried out at normal temperature and pressure without the need to apply high-temperature or high-pressure reaction conditions, or to use acidic substances to react with bicarbonates. It has the characteristics of low energy consumption and high efficiency, and also reduces the generation and treatment needs of chemical waste, thereby 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 plate 210 and a second electrode plate 220; when the capacitive adsorption component is in a first state, the first electrode plate 210 is the positive electrode and the second electrode plate 220 is the negative electrode, and the first electrode plate 210 adsorbs negative ions.

[0065] Understandably, the first electrode 210 and the second electrode 220 can form a capacitor. By applying a voltage to the first electrode 210 and the second electrode 220, an electric field can be generated between the first electrode 210 and the second electrode 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 bicarbonate anions generated in the hydration chamber 101, causing the bicarbonate anions to accumulate on the first electrode 210, thereby achieving carbon dioxide capture.

[0067] In some embodiments, the adsorption chamber 102 is provided with an electrolyte 900, which contains at least a portion of the first electrode plate 210 and the second electrode plate 220. When the capacitive adsorption assembly is in the second state, the first electrode plate 210 is the negative electrode and the second electrode plate 220 is the positive electrode. Negative ions detach from the first electrode plate 210 and dissolve in the electrolyte 900.

[0068] For example, the electrolyte 900 can be a sodium sulfate solution or a sodium chloride solution, which can conduct current under the influence of an electric field. The presence of the electrolyte 900 provides a medium for the conduction of negative ions, allowing the electric field to act effectively between the plates and promoting 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. As a result, the direction of the electric current on the negative ions also changes, and the negative ions will detach from the first electrode 210 and dissolve into the electrolyte 900, thereby releasing carbon dioxide. At the same time, the adsorption capacity of the first electrode 210 is restored.

[0070] Capacitive adsorption components utilize the adjustability of the electric field to achieve efficient adsorption and regeneration processes in carbon dioxide capture devices. The use of electrolyte 900 and the polarity reversal mechanism enable the carbon dioxide capture device to operate cyclically with low energy consumption and achieve precise control of the adsorption process, thereby improving capture efficiency and enhancing the economy and sustainability of the carbon dioxide capture device.

[0071] Therefore, the process of promoting carbon dioxide hydration through carbonic anhydride bacteria and absorbing bicarbonate anions generated by carbon dioxide hydration using capacitive adsorption components has low requirements for the reaction environment and can be carried out at room temperature and pressure without the use of chemical reagents. This can achieve 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 into or out of the adsorption chamber 102.

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

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

[0075] By controlling the flow of electrolyte 900, not only can the heat generated during the adsorption process be removed, but ions can also be carried into or out of the adsorption chamber 102, enhancing ion exchange and mass transfer efficiency, so as to achieve dynamic adjustment 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 help remove impurities that may accumulate in the adsorption chamber 102, improving the reliability and lifespan of the carbon dioxide capture device.

[0077] In some embodiments, a separator 300 is provided inside the housing 100, the outer side of the separator 300 abuts against the inner wall of the housing 100; an adsorption cavity 102 is formed on the inner side of the separator 300; and an exchange membrane 400 is provided on the surface of the separator 300 facing the hydration cavity 101.

[0078] The housing 100 includes a body 110 and an end plate 120. A hydration cavity 101 is formed inside the body 110. An opening 111 is opened on the body 110. A partition 300 is disposed on the side of the body 110 where the 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 main 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 main body 110, and the end plate 120 together form an adsorption cavity 102.

[0080] The second electrode plate 220 is attached to the side of the current collector 221 facing the separator 300, and the second electrode plate 220 is arranged 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. It is widely used in the protection of electronic components, capacitor housings and other applications, 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 selective permeability to anions and is also called an ion-selective permeable membrane.

[0083] The exchange membrane 400 covers the inlet 111, allowing only bicarbonate anions to enter the adsorption chamber 102 through the inlet 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 that are 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 flow out of the adsorption chamber 102 through the outlet 320.

[0085] For example, the current collector 221 can be a titanium plate. Titanium plates have good electrical conductivity, effectively conducting current and facilitating efficient current transfer between the second electrode plate 220 and the external power source. Furthermore, titanium plates possess excellent corrosion resistance, resisting oxidation and chemical corrosion even in direct contact with the electrolyte 900, ensuring the durability of the capacitive adsorption assembly. In addition, the high mechanical strength of titanium plates helps maintain the shape and integrity of the second electrode plate 220, also contributing to the structural stability of the capacitive adsorption assembly.

[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 arranged in parallel opposite to each other.

[0087] Understandably, as a type of bacteria, carbonic anhydride bacteria rely on membrane potential to maintain the exchange of substances and energy transfer between their intracellular and extracellular spaces. The voltage applied to the capacitive adsorption component may interfere with the bacterial membrane potential, affecting cell growth and metabolism.

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

[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 plate 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 the first electrode plate 210, forming a parallel electric field structure. This ensures the uniformity and intensity of the electric field, making the movement of negative ions in the adsorption cavity 102 more orderly and efficient.

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

[0092] Understandably, the shell 100 has an opening, and the hydration chamber 101 can be connected to the external environment through the opening, so that the capture liquid 800 can directly contact carbon dioxide in the air, which increases the contact area and time between carbon dioxide and the capture liquid 800, improves the hydration reaction rate of carbon dioxide, and thus enhances the capture effect of carbon dioxide.

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

[0094] The gas diffuser 500 is located inside the hydration chamber 101. The gas diffuser 500 can disperse air into uniform fine bubbles, making it easier for the carbon dioxide in the diffuser to be absorbed by the capture liquid 800.

[0095] Specifically, the carbon dioxide capture device provided in this application optimizes the contact conditions between carbon dioxide and the capture liquid 800, enabling it to capture carbon dioxide from the air more effectively.

[0096] Figure 4 This is a schematic flowchart illustrating the carbon dioxide capture method provided in an embodiment of this application. (In conjunction with...) Figure 4 As shown, another aspect of this application provides a carbon dioxide capture method, which includes the following steps:

[0097] S101. Carbon dioxide is captured by the capture liquid 800 in the hydration chamber 101 and hydrated to form negative ions;

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

[0099] S103. 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.

[0100] Among them, the capture solution 800 can be a solution of carbonic anhydride bacteria.

[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. The soil samples can then be cultured in a complete nutrient medium to isolate and purify carbonate anhydride bacteria strains.

[0102] Carbonic anhydrase not only catalyzes the reaction of carbon dioxide and water to produce carbonic acid, but it can also catalyze the hydrolysis of some ester compounds. Different concentrations of carbonic anhydrase hydrolyze p-nitrophenyl acetate to produce p-nitrophenol acetate, resulting in different absorbance values ​​in the solution, thus reflecting varying carbonic anhydrase activities. Therefore, the cultured carbonic anhydrase bacteria solution can be mixed with a p-nitrophenyl acetate solution, and the absorbance after the reaction can be measured using a UV spectrophotometer to evaluate the carbonic anhydrase production capacity of the carbonic anhydrase bacteria, thereby screening for highly efficient carbonic anhydrase-producing bacteria.

[0103] The selected carbonic anhydride-producing bacteria still need to be cultured. Specifically, the carbonic anhydride-producing bacteria are inoculated onto solid culture medium and incubated in a 30°C incubator for 24–48 hours; then transferred to liquid culture medium and cultured on a shaker at 30°C and a shaker speed of 125 r / min; while culturing on the shaker, the absorbance of the bacterial solution at 600 nm is measured using a UV spectrophotometer, and the OD is calculated. 600 The concentration of carbonic anhydride bacteria reaches approximately 0.4, meaning the bacterial concentration reaches 7 × 10⁴. 8 ~9×10 10 Then, the carbonic anhydride bacteria solution is transferred to the hydration chamber 101 for further cultivation until the carbonic anhydride bacteria grow to the logarithmic phase. At this point, air can be introduced into the hydration chamber 101 to capture low concentrations of carbon dioxide in the air and generate bicarbonate anions.

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

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

[0106] Of course, the solid culture medium, liquid culture medium and culture vessel in the embodiments of this application can also be other conventional culture media and culture vessels, and the embodiments of this application do not impose any restrictions on them.

[0107] In some embodiments, the adsorption component 200 is configured as a capacitive adsorption component, which includes a first electrode plate 210 and a second electrode plate 220. The adsorption of negative ions by the adsorption component 200 through the adsorption chamber 102 includes: controlling the capacitive adsorption component to be in a first state, where the first electrode plate 210 is the positive electrode and the second electrode plate 220 is the negative electrode, and adsorbing negative ions through the first electrode plate 210; and controlling the capacitive adsorption component to be in a second state, where the second electrode plate 220 is the positive electrode and the first electrode plate 210 is the negative electrode, so that negative ions detach from the first electrode plate 210.

[0108] The first electrode 210 and the second electrode 220 can be 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 210 and the second electrode 220 can also be made of materials such as carbon nanotubes and graphene, and this application embodiment does not impose any restrictions on this.

[0109] Specifically, activated carbon, superconducting 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 it forms a lumpy paste. The lumpy paste is then pressed into a thin film using a film press, and hot-pressed onto a titanium mesh at high temperature to prepare a pair of composite electrode sheets, which serve as the first electrode 210 and the second electrode 220 in the capacitive adsorption assembly. The density of the composite electrode sheet is 7.2-8.0 mg·cm³. -2 .

[0110] The first electrode plate 210 and the second electrode plate 220 are distributed on opposite sides of the separator 300. A glass fiber diaphragm can be laid between the first electrode plate 210 and the second electrode plate 220. The glass fiber diaphragm can control the electrode spacing 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 210 of the capacitive adsorption component is positively charged and the second electrode 220 is negatively charged. The first electrode 210 can selectively adsorb bicarbonate anions.

[0112] In the second state, the polarity of the plates is opposite to that in the first state, with the first plate 210 being the negative electrode and the second plate 220 being the positive electrode. By changing the polarity, the bicarbonate anions adsorbed on the first 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 plate 210.

[0113] It is evident that capacitive adsorption components, by utilizing the tunability of the electric field, provide an efficient and controllable adsorption and regeneration mechanism for the capture and release of carbon dioxide. This enables precise control of the capture and release process, improving capture efficiency and reducing energy consumption.

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

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

[0116] When the concentration of negative ions is too high, the adsorption efficiency may decrease or regeneration may become difficult. By incorporating a circulation component in the carbon dioxide capture device, the electrolyte 900 can flow within the adsorption chamber 102, enabling the renewal and reuse of the electrolyte 900. The flowing electrolyte 900 removes excess negative ions, helping to maintain a uniform ion concentration and temperature distribution, and preventing localized oversaturation or ion depletion.

[0117] Specifically, the carbon dioxide capture method provided in this application embodiment 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 and generate negative ions.

[0119] A first working voltage is applied to the capacitive adsorption component, while 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 carbon dioxide capture.

[0120] A second operating voltage is applied to the capacitive adsorption component to change the polarity of the first electrode 210 and the second electrode 220, thereby performing a negative ion desorption process. During the desorption process, the capacitive adsorption component desorbs the negative ions on the first electrode 210 into the electrolyte 900, thereby releasing carbon dioxide.

[0121] It should be noted that the Bacillus carbonate solution can be filled into the hydration chamber 101 as the capture solution 800; or the Bacillus carbonate solution can be centrifuged, resuspended in phosphate buffer, and then filled into the hydration chamber 101 as the capture solution 800.

[0122] Electrolyte 900 can be a 0.01M sodium sulfate solution or a 0.01M sodium chloride solution.

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

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

[0125] In summary, the carbon dioxide capture device provided in this application embodiment fills the hydration chamber 101 with capture liquid 800 as a biocatalytic unit. This biocatalytic unit is positioned outside the capacitive adsorption assembly. The biocatalytic unit promotes carbon dioxide hydration, generating bicarbonate anions (HCO3-). - The carbon dioxide capture device, based on the present application, uses a capacitive adsorption component to adsorb bicarbonate anions, thereby directly capturing low-concentration carbon dioxide from the air. Then, by changing the polarity of the voltage applied to the adsorption component 200 or reducing the voltage, bicarbonate anions are released, thus releasing the carbon dioxide. The carbon dioxide capture device provided in this application can achieve carbon dioxide capture and release with low energy consumption, solving the problems of high energy consumption and low efficiency in the carbon dioxide capture and release process.

[0126] Finally, it should be noted that those skilled in the art, upon considering the specification and practicing the application disclosed herein, will readily conceive of other embodiments of the present application. The embodiments of this application are intended to cover any variations, uses, or adaptations of the embodiments of this application that follow the general principles of the embodiments of this application and include common knowledge or customary technical means in the art not disclosed in the embodiments of this application. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of the embodiments of this application are indicated by the following claims.

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

Claims

1. A carbon dioxide capture device, characterized in that, Includes a housing (100) and an adsorption assembly (200); The shell (100) forms a hydration chamber (101) and an adsorption chamber (102), which are connected by a port (111); The hydration chamber (101) is filled with a capture liquid (800), which is used at least to capture carbon dioxide to form negative ions; The inlet (111) is provided with an exchange membrane (400), which 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 disposed in the adsorption chamber (102), and the adsorption component (200) is used to adsorb at least the negative ions; The adsorption component (200) is configured as a capacitive adsorption component; The capacitive adsorption assembly includes a first electrode plate (210) and a second electrode plate (220); When the capacitive adsorption component is in the first state, the first electrode plate (210) is the positive electrode and the second electrode plate (220) is the negative electrode, and the first electrode plate (210) adsorbs the negative ions.

2. The carbon dioxide capture device according to claim 1, characterized in that, The adsorption chamber (102) is provided with an electrolyte (900), which contains 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 the negative electrode and the second electrode plate (220) is the positive electrode. The negative ions detach from the first electrode plate (210) and dissolve in the electrolyte (900).

3. The carbon dioxide capture device according to claim 2, characterized in that, The carbon dioxide capture device further includes a circulation component, which is at least used to drive the electrolyte (900) into or out of the adsorption chamber (102).

4. The carbon dioxide capture device according to any one of claims 1-3, characterized in that, A partition (300) is provided inside the housing (100), and the outer side of the partition (300) abuts against the inner wall of the housing (100); The adsorption cavity (102) is formed on the inner side of the separator (300); the exchange membrane (400) is disposed on the surface of the separator (300) facing the hydration cavity (101).

5. The carbon dioxide capture device according to claim 4, characterized in that, The first electrode plate (210) is disposed on the side of the exchange membrane (400) opposite to 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 in parallel opposite to each other.

6. The carbon dioxide capture device according to claim 1, characterized in that, The housing (100) is provided with an opening, through which the capturing liquid (800) in the hydration chamber (101) captures carbon dioxide at least through the opening; And / or, the carbon dioxide capture device further includes a gas diffuser (500) for at least introducing carbon dioxide from the air into the hydration chamber (101).

7. A method for capturing carbon dioxide, characterized in that, include: Carbon dioxide is captured by the capture liquid (800) in the hydration chamber (101) and the carbon dioxide is hydrated to form negative ions; The negative ions are allowed to flow from the hydration chamber (101) to the adsorption chamber (102) through the inlet (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; The adsorption component (200) is configured as a capacitive adsorption component, which includes a first electrode plate (210) and a second electrode plate (220). The adsorption of negative ions by the adsorption assembly (200) through the adsorption chamber (102) includes: The capacitive adsorption assembly is controlled to be in a first state, with the first electrode plate (210) as the positive electrode and the second electrode plate (220) as the negative electrode, and the negative ions are adsorbed through the first electrode plate (210). The capacitive adsorption component is controlled to be in a second state, with the second electrode plate (220) as the positive electrode and the first electrode plate (210) as the negative electrode, so that the negative ions are separated from the first electrode plate (210).

8. The carbon dioxide capture method according to claim 7, characterized in that, The adsorption chamber (102) is provided with an electrolyte (900), which contains at least a portion of the first electrode plate (210) and the second electrode plate (220); The carbon dioxide capture device further includes a circulation component, and the method further includes: To obtain the concentration of the negative ions in the electrolyte (900); When the concentration of the negative ions is higher than the set concentration, the circulation component is controlled to at least drive the electrolyte (900) to flow relative to the adsorption chamber (102) in order to reduce the concentration of negative ions in the electrolyte (900) in the adsorption chamber (102).

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