Description:FIELD OF INVENTION
[0001] The present disclosure relates to a water-based carbon capture (WBCC) system that comes under the field of clean technology. More specifically the present disclosure relates to filter out carbon dioxide (CO₂) from the air using water-based solution.

BACKGROUND
[0002] Carbon dioxide filtration systems play a crucial role in a wide range of applications, from industrial processes to environmental control systems. These systems are designed to remove or capture CO₂ from gases to reduce emissions and maintain air quality. However, conventional CO₂ filtration technologies often face significant limitations that hinder their performance and efficiency.
[0003] Conventional CO₂ filtration technologies use amines or other solvents in CO₂ filtration systems poses significant environmental and health risks. These chemicals can degrade over time, creating toxic byproducts, and their disposal requires strict safety protocols. The reliance on hazardous chemicals also makes maintenance more complex and costly. Furthermore, handling these substances increases the system's overall environmental footprint.
[0004] Some other type of traditional CO₂ filtration systems often fail to achieve uniform bubble distribution across the filter medium. This uneven flow causes some regions to become over-saturated while others remain underutilized, leading to inefficient CO₂ capture. The result is increased energy consumption, longer processing times, and incomplete CO₂ removal. Further other conventional filtration systems generate large bubbles, which reduces the total surface area available for gas-to-filter interaction. These large bubbles tend to rise quickly through the system, preventing adequate contact time with the filter medium.
[0005] Many conventional CO₂ filtration systems are large, stationary units designed for industrial-scale operations. Their size makes them difficult to transport and limits their use to fixed locations. Further, they have issues like dead zones areas within the filtration system where gas flow is stagnant or poorly distributed, lack in pulse flow, which involves periodic variation in the flow rate.
[0006] These conventional systems are often impractical for smaller or more flexible applications, such as portable air filtration units or installations near residential areas. The large size and lack of portability also make them unsuitable for deployment in locations with limited space, such as near homes or in smaller facilities.
[0007] Traditional CO₂ filtration systems often involve high initial installation costs due to their large size, complex design, and the need for specialized equipment. The installation process can be time-consuming and labor-intensive, further increasing costs. In addition, ongoing operational expenses, such as energy consumption, maintenance, and the need for chemical replenishment, contribute to the high running costs of these systems. These expenses make the systems prohibitively expensive for many users, particularly in smaller or low-budget operations.
[0008] Therefore, there is a need to overcome the problems mentioned above in the process of reducing the carbon dioxide from the environment or from industrial waste.
OBJECTIVES
[0009] The primary objective of the present disclosure is to provide a water-based carbon bubble (WBCC) system which provides uniform bubble size of the gas inside the chamber and uniform distribution of the bubble for eliminating channeling effect of the gas streams, which can be cost-effective and scalable.
[0010] Yet another objective of the present disclosure is to provide a water-based carbon capture system which can extend the residence time for CO₂ absorption in a water-based bubble carbon capture system.
[0011] Yet another objective of the present disclosure is to provide a water-based carbon capture system which can provide pulsed or oscillatory airflow modulation to fine-tune bubble size.
[0012] Yet another objective of the present disclosure is to provide a water-based bubble carbon capture system which can provide ease of maintenance by providing removable and cleanable diffuser plates.
[0013] Yet another objective of the present disclosure is to provide a water-based carbon capture system which can create mild vortex flow in the aqueous alkaline absorbent solution for improving bubble circulation and reducing coalescence of bubbles to improve residence time and capture rates.
[0014] Yet another objective of the present disclosure is to provide a water-based carbon capture system that can work at ambient pressures for lowering energy consumption compared to high-pressure systems.
[0015] Yet another objective of the present disclosure is to provide a water-based bubble carbon capture system which can eliminate the use of harmful chemicals, making the process eco-friendly and safer.
[0016] Yet another objective of the present disclosure is to provide a water-based carbon capture system that can produce uniform micro-bubbles with a high surface area, enhancing CO₂ mass transfer and prevent channeling.
[0017] Yet another objective of the present disclosure is to provide a water-based carbon capture system that can be portable.
[0018] Still another objective of the present disclosure is to provide a water-based carbon capture system that can lower maintenance cost due to self-cleaning hydrophilic surfaces.
SUMMARY
[0019] The water-based carbon capture (WBCC) system works differently from traditional carbon capture methods, in the WBCC an aqueous alkaline absorbent solution used which can react with tiny (micro) air bubbles to absorb CO₂. Instead of using big and expensive equipment, the WBCC uses a simple tank and bubble producing setup, which makes it comparatively cheaper and reduces the maintenance cost. The added solution in the water help trap CO₂ more effectively, without creating any toxic byproducts. Traditional systems also require complicated and heavy machinery and cooling systems, while WBCC have simple construction which makes it portable and perfect for places like small factories, schools, or offices, where big carbon capture systems will not fit or make sense.
[0020] According to one aspect of the present disclosure provides a water-based bubble carbon capture (WBCC) system for filtering the gas. The system comprises a sealed chamber configured to receive a gas stream containing carbon dioxide. An aqueous alkaline absorbent solution disposed within the chamber. An air intake configured to introduce the gas stream into a rotary valve modulator positioned at a lower part of the chamber. The rotary valve modulator comprises at least one bubble diffuser plate comprising a plurality of micro-orifices, a motor operatively connected to the bubble diffuser plate and configured to rotate the bubble diffuser plate, a plenum chamber configured to evenly distribute gas-flow across the bubble diffuser plate, and one or more flow straighteners disposed within the plenum chamber to maintain laminar gas-flow. A plurality of outlet vents connected to chamber configured to release treated gas.
[0021] The gas stream is introduced into the rotary valve modulator, passes through the bubble diffuser plate to form micro-bubbles within the aqueous alkaline absorbent solution, and carbon dioxide is absorbed from the gas stream. This disclosure provides a bubble diffuser plate configured to generate uniform micro-bubbles within an alkaline liquid solution such as sodium carbonate or sodium hydroxide solution to enhance CO₂ absorption efficiency.
[0022] In some exemplary embodiments of the present disclosure provide a water-based bubble carbon capture (WBCC) system wherein the chamber comprises a height of approximately sixty centimeters and a diameter of approximately twenty-two centimeters and is configured to contain between 8 and 10 liters of the aqueous alkaline absorbent solution. The bubble diffuser plate has a diameter of approximately sixteen centimeters, a thickness of approximately four millimeters, and comprises approximately 350 micro-orifices, each having a diameter of approximately 0.8 millimeters and spaced approximately five millimeters apart. The motor is configured to rotate the diffuser plate at a speed between 3 and 4 revolutions per minute, and the generated micro-bubbles have diameters ranging from 0.5 millimeters to 1.2 millimeters. The air intake is configured to provide gas-flow rate between 3 and 5 liters per minute.
[0023] Yet some other embodiments of the present disclosure provide a water-based bubble carbon capture (WBCC) system wherein the chamber comprises a height of approximately 1.2 meters and a diameter of approximately 35 to 40 centimeters and is configured to contain approximately 100 liters of the aqueous alkaline absorbent solution to a fill height of approximately 80 centimeters. The bubble diffuser plate has a diameter of approximately thirty-two centimeters, a thickness of approximately six millimeters, and comprises between 2,500 and 3,000 micro-orifices, each having a diameter of approximately one millimeter and spaced approximately five millimeters apart. The motor is configured to rotate the bubble diffuser plate at approximately five revolutions per minute, and the system is configured to manage a gas flow rate between 500 and 800 liters per minute and achieve carbon dioxide capture efficiency between 80% and 85% in a single pass.
[0024] The rotary valve modulator is further configured to produce pulsed, oscillatory gas-flow through alignment and misalignment of the micro-orifices of the bubble diffuser plate with a plurality of angular inlet ports, thereby generating periodic bursts of gas flow into the aqueous alkaline absorbent solution. The micro-bubbles generated have diameters ranging from 0.5 millimeters to 1.5 millimeters.
[0025] The reaction between carbon dioxide and the aqueous alkaline absorbent solution results in the formation of solid carbonate precipitates, which are collected at a lower part of the chamber. The aqueous alkaline absorbent solution comprises at least one of sodium carbonate and sodium hydroxide at a concentration ranging from 0.1 molar to 0.5 molar.
[0026] According to another aspect of the present disclosure provides a method for capturing carbon dioxide. The said method comprising directing a gas stream containing carbon dioxide from an industrial chimney or duct into the WBCC system through a sealed inlet duct. Then, introducing the gas stream into the rotary valve modulator. Thereafter, rotate the bubble diffuser plate at a predetermined speed to generate oscillatory airflow and micro-bubbles. After that, allowing the micro-bubbles to chemically react with the aqueous alkaline absorbent solution such that carbon dioxide is absorbed into the aqueous alkaline absorbent solution and releasing treated, carbon-free air through one or more vertically oriented outlet vents. The chimney is sealed and connected to the WBCC system through a dedicated duct, such that no untreated exhaust is released directly into the atmosphere.
[0027] The method further comprises a step of adjusting the rotation speed of the bubble diffuser plate in real-time to control bubble size and pulsing frequency based on variations in gas flow rate.
[0028] The foregoing paragraphs have been provided by way of general introduction and are not intended to limit the scope of the following claims. The embodiments described, together with further advantages, will be best understood by reference to the following detailed description taken in conjunction with the accompanying drawings.
BRIEF DESCRIPTION OF DRAWINGS
[0029] FIG. 1 is a block diagram illustrating an exemplary embodiment of the water-based bubble carbon capture system in accordance with the present disclosure.
[0030] FIG. 2 is a block diagram illustrating an exemplary view of the bubble diffuser plates.
[0031] FIG. 3 illustrates an exemplary embodiment of the water-based bubble carbon capture system for industrial use.
[0032] FIG. 4 is a flow chart illustrating a method for capturing carbon dioxide using a water-based bubble carbon capturing system.
DETAILED DESCRIPTION OF THE PRESENT DISCLOSURE
[0033] Aspects of the present invention are best understood by reference to the description set forth herein. All the aspects described herein will be better appreciated and understood when considered in conjunction with the following descriptions. It should be understood, however, that the following descriptions, while indicating preferred aspects and numerous specific details thereof, are given by way of illustration only and should not be treated as limitations. Changes and modifications may be made within the scope herein without departing from the spirit and scope thereof, and the present invention herein includes all such modifications.
[0034] As explained above, the Water-Based Bubble Carbon Capture (WBCC) system comes under the field of clean technology, focusing on separating the carbon content from the air. It offers a simple energy-efficient way to capture carbon dioxide (CO₂) from the air using bubbles in a specially prepared water-based solution. There are many conventional methods like amine-based capture that require significant energy for regeneration. An approximate analysis, these conventional methods required 1.0 to 4.0 GJ/ton energy to operate, which is equivalent to ~278– 1111 kWh/ton. Further these types of conventional amine-based carbon capturing system use harmful chemicals. Moreso, these conventional methods are not only costly in the installation but also their running cost and maintenance cost are also remarkably high. These types of methods use bulky systems which are difficult to move from one place to another.
[0035] The present disclosure on the other hand uses a water-based bubble carbon capture system that purifies air containing harmful carbon compounds. This system can be used in houses, schools, offices, factories, and high-pollution areas, with adaptable shapes for various places where it must be implemented.
[0036] By using inexpensive materials like water and simple mechanical systems, the present system significantly reduces the operational and maintenance costs. Furthermore, its construction reduces the installation cost and eliminates the use of harmful chemicals, making the process eco-friendly and safer. The present system can be made so compact in design so that it can be portable and can be designed according to need so that it can be mid-size emitters like factories and for larger plants.
[0037] In the present system, an air intake fan pulls polluted air having (carbon constituents) into a chamber. The air is passed through a liquid solution (water + mild alkaline like sodium carbonate or sodium hydroxide). The air bubbles up through the liquid, and CO₂ reacts with the solution to form a carbonate compound.
• CO₂ Absorption Reaction:
• Na₂CO₃ + CO₂ + H₂O → 2 NaHCO₃ (sodium bicarbonate - safe solid product)
• Ca (OH)₂ + CO₂ → CaCO₃
(solid calcium carbonate - chalk-like material)

[0038] The captured CO₂ is precipitated as a solid carbonate at the bottom of the container, which can be filtered, collected and then can be used in soils to enhance fertility. The remaining air is released back into the environment through the outlet vents.
[0039] Referring now to the drawings, and more particularly to FIGS. 1 and 2, where similar reference characters denote corresponding features consistently throughout the figures, there are shown preferred embodiments.
[0040] FIG. 1 is a block diagram illustrating a water-based carbon capturing system (100) for capturing carbon from populated air in accordance with the present disclosure. The system (100) comprises a chamber (101) filled with aqueous alkaline absorbent solution (102). The chamber (101) is properly sealed so that there will be no leakage. The chamber (101) is designed in such a way that an air intake (103) is configured to introduce a gas stream (111) having carbon dioxide into the chamber (101). In the chamber (101) a rotary valve modulator (104) is positioned in such a way that the gas stream (111) coming from the air intake (103) passes through the rotary valve modulator (104). The rotary valve modulator (104) is positioned lower part of the chamber (101). After filtering the air inside the chamber (101), a plurality of outlet vents (110) configured to release filtrate/treated gas outside the chamber (101).
[0041] The rotary valve modulator (104) as shown in FIG. 1 and FIG. 2 comprising one or more bubble diffuser plate (105) containing micro-orifices (106) as shown in FIG. 2, a motor (107), a plenum chamber (108), and one or more flow straighteners (109). The motor (107) operatively connected to the bubble diffuser plates (105) and configured to rotate the plates (105). The plenum chamber (108) configured to evenly distribute gas-flow across the bubble diffuser plates (105) and one or more flow straighteners (109) disposed within the plenum chamber (108) to keep laminar gas-flow.
[0042] Whenever the gas stream (111) passes by the air intake (103) is introduced into the rotary valve modulator (104). Firstly, the gas stream (111) passes through the bubble diffuser plates (105) which rotates with the help of motor (107) and has micro-orifices (106) to form micro-bubbles (112) within the aqueous alkaline absorbent solution (102), and carbon dioxide is absorbed from the gas stream (111) into the absorbent as the micro-bubbles (112) rise within the chamber (101).
[0043] The size of the system (100) is dependent upon the requirement and need, for example in some embodiments, for small plant such as house, office, low polluted areas, the size of the chamber (101) has a height of approximately 60 centimeters and a diameter of approximately 22 centimeters and is configured to contain between 8 and 10 liters of the aqueous alkaline absorbent solution (102). The bubble diffuser plates (105) have a diameter of approximately sixteen centimeters, a thickness of approximately four millimeters, and comprise approximately 350 micro-orifices (106), each having a diameter of approximately 0.8 millimeters and spaced approximately five millimeters apart. In this example, the air intake (103) is configured to provide a gas-flow rate of between 3 and 5 liters per minute. The speed of the motor (107) is configured to rotate the bubble diffuser plates (105) for effective output is set at range between 3 and 4 revolutions per minute, so that the generated micro-bubbles (112) have diameters ranging from 0.5 millimeters to 1.2 millimeters.
[0044] In some other embodiments where the air is more polluted, the size of the system or plant may vary, for example, the size of the chamber (101) comprises a height of approximately 1.2 meters and a diameter of approximately 35 to 40 centimeters and is configured to contain approximately 100 liters of the aqueous alkaline absorbent solution (102) to a height of approximately 80 centimeters. The bubble diffuser plate (105) has a diameter of approximately thirty-two centimeters, a thickness of approximately six millimeters, and comprises between 2,500 and 3,000 micro-orifices (106), each having a diameter of approximately one millimeter and spaced approximately five millimeters apart.
[0045] For such system (100) where requirement of filtration of air is more, in these examples, the motor (107) is configured to rotate the bubble diffuser plates (105) at approximately 5 revolutions per minute, and the system (100) is configured to handle a gas flow rate between 500 and 800 liters per minute and achieve a carbon dioxide capture efficiency between 80% and 85% in a single pass.
[0046] Although the size of the system (100) depends upon the requirement and needs, such as how much air needs to be filtered out or quality of air. But the size of the micro-bubbles (112) formed inside the chamber (101) are having same physical parameters. In simple words the size of micro-bubbles (112) ranges from 0.5 millimeters to 1.5 millimeters.
[0047] In some embodiments, the aqueous alkaline absorbent solution (102) comprises at least one of sodium carbonate and sodium hydroxide at a concentration ranging from 0.1 molar to 0.5 molar.
[0048] In some embodiments, the reaction between the carbon dioxide and the aqueous alkaline absorbent solution (102) results in the formation of solid carbonate precipitates (113), which are collected at a lower part of the chamber (101).
[0049] FIG. 2 shows an exemplary view of the bubble diffuser plates (105) that are made of chemically resistant materials such as PTFE (polytetrafluoroethylene), stainless steel (316L), or high-density polyethylene (HDPE).
[0050] In some embodiments, hydrophilic coating to ensure uniform wetting and prevent fouling may be applied to the bubble diffuser plates (105).
[0051] These bubble diffuser plates (105) circular or rectangular in shape having diameter (or width) corresponding to the reactor cross-section, however, thickness of these plates (105) in the range of 2–10 mm for structural rigidity and ease of fabrication. In these plates (105), micro-orifices (106) are uniformly distributed across the surface of these plates with diameters ranging from 100–500 micrometers. These micro-orifices (106) having density 100–500 holes per square inch, ensuring even gas distribution.
[0052] In some embodiments, below these bubble diffuser plates (105), a plenum chamber (108) is provided to evenly distribute the air and to avoid localized high-pressure zones. The plenum chamber (108) is integrated with flow straighteners (109) or vane structures to minimize turbulence and ensure laminar airflow distribution. As air flows through the micro-orifices (106), it shears into uniform micro-bubbles (112). These micro-bubbles (112) exhibit higher surface area-to-volume ratios, promoting efficient CO₂ mass transfer.
[0053] In some embodiments, these bubble diffuser plates (105) can be removable for cleaning and maintenance purposes and can be placed at the base of the chamber (101) or in multiple stages within taller chamber for improving performance.
[0054] In some embodiments, the system (100) of the present disclosure can work at ambient pressures which result in lowering energy consumption compared to high-pressure systems.
[0055] In some embodiments, the rotary valve modulator (104) has more than one plate, and these plates are capable of rotating at their axis. When these plates rotate at their axis their micro-orifices (holes) align and misalign with each other and with the inlet. This rotation creates mild vortex flow in the liquid, improving bubble circulation and reducing coalescence of bubbles. It helps in improving residence time and capture rates. Further, this rotation speed controls pulsation frequency 1–5 Hz. By controlling the speed of the plates or speed of motor, the production rate of the bubble can be adjusted in real-time. This process results in enhancement of micro-bubble shearing at orifice exit and can prevent bubble coalescence. Further, improve gas-liquid mass transfer rate and extend residence time of gas in liquid column.
[0056] As explained in the above, these rotating plates are placed inside the chamber (101) connected to the gas stream (111). The plates have holes on their surface for blocking and releasing the air into the chamber (101). As these plates spin, their slots align with the gas stream (111) at regular intervals. When the holes are aligned, gas flows freely through these holes into the chamber and when the holes are not aligned, the plates block the air, causing a short pause. So, as the plates rotate, the system chops the air into pulses. For example, if the plates spin at 300 RPM (5 rotations per second) and have four slots/holes, it will deliver twenty air pulses per second. The speed of the motor or the number of slots can be adjusted to control the frequency and duration of the pulses.
[0057] This construction allows consistent, rhythmic pulsed or oscillatory airflow, perfect for generating smaller, and uniform micro-bubbles (112) which are better for CO₂ absorption. The smaller and uniform micro-bubbles (112) provide more surface area which enhances gas-liquid contact and improved mixing prevents stagnant zones. This has resulted in longer bubble residence time, more CO₂ captured and lower energy use.
[0058] In some embodiments, multiple intel and outlet are used at the top instead of a single pipe design for uniform pressure distribution, to reduce back pressure inside the chamber (101), allowing even and stable air evacuation from all zones.
[0059] Multiple air intel and outlet from all sections of the chamber (101) is collected simultaneously which prevents CO₂ accumulation in stagnant corners which can happen in single outlet systems.
[0060] Further, if one pipe gets partially blocked (due to carbonate mist), other pipes can maintain flow and enhance operational safety. Furthermore, in small-scale WBCC units, multiple outlets also prevent vibration or pressure pulsing during peak operation.
[0061] Another embodiment of the present disclosure is shown in FIG. 3 which shows an industrial model where air inlets (103) are directly connected to factory chimney (114) and outlet vents (110) are positioned upward in the chamber (101) and released treated air into the environment.
[0062] With reference to FIGS 1-3, FIG. 4 is a flow chart illustrating a method for capturing carbon dioxide using a water-based bubble carbon capturing system. At step 402; the method includes directing a gas stream (111) containing carbon dioxide which can directly connect to an industrial chimney (114) or duct or these gas stream (111) can capture from the polluted areas via a sealed inlet air fan. The inlet air fan maintains the flow rate of the gas stream (111) so that the WBCC system can operate effectively.
[0063] At step 404, the method includes introducing the gas stream (111) which is coming via air intel duct into the rotary valve modulator (104). In this step the gas stream (111) before reaching the chamber (101) of the system passes through the rotary valve modulator (104). This rotary valve modulator (104) comprising one or more bubble diffuser plates (105). These plates (105) have a plurality of micro-orifices (106) and connected with a motor (107). The motor (107) helps to rotate these plates (105) in their axis. The gas stream (111) before passing through the orifices (106) of the plates (105) passes through a plenum chamber (108) which is located below the plates (105) and has one or more flow straighteners (109) and configured to evenly distribute gas-flow across the bubble diffuser plates (105). By adjusting the rotation speed of the bubble diffuser plates (105) in real-time to control bubble size and pulsing frequency based on variations in gas flow rate.

[0064] At step 406, the method includes rotating the bubble diffuser plates (105) at a predetermined speed to generate oscillatory airflow and micro-bubbles (112). As explained in step 404, the bubble diffuser plates (105) are connected to the motor (107) and rotate in their axis. The rotation of the plates (105) controls the flow of the gas stream (111) so that the oscillatory flow of the gas stream (111) and micro-bubbles (112) archive.
[0065] At step 408, the method includes allowing the micro-bubbles (112) to pass through the micro-holes of the pates and reach the chamber (101). Inside of the chamber (101), the micro-bubbles (112) chemically react with the aqueous alkaline absorbent solution so that carbon dioxide separates from the gas stream (111).
[0066] At step 410, the method includes releasing treated gas, carbon-free air through one or more vertically oriented outlet vents into the environment. The captured CO₂ is precipitated as a solid carbonate at the bottom of the container, which can be filtered, collected and then can be used in soils to enhance fertility.
[0067] The chimney (114) is sealed and connected to the WBCC system through a dedicated duct, such that no untreated exhaust is released directly into the atmosphere.
[0068] The embodiments of the present invention disclosed herein are intended to be illustrative and not limiting. Other embodiments are possible, and modifications may be made to the embodiments without departing from the spirit and scope of the invention. As such, these embodiments are only illustrative of the inventive concepts contained herein.
, Claims:1. A water-based carbon capture (WBCC) system (100), comprising:
a sealed chamber (101) configured to receive a gas stream (111) containing carbon dioxide;
an aqueous alkaline absorbent solution (102) disposed within the chamber (101);
an air intake (103) configured to introduce the gas stream (111) into a rotary valve modulator (104) positioned at a lower portion of the chamber (101); wherein the rotary valve modulator (104) comprises:
at least one bubble diffuser plate (105) comprising a plurality of micro-orifices (106);
a motor (107) operatively connected to the bubble diffuser plates (105) and configured to rotate the bubble diffuser plates (105);
a plenum chamber (108) configured to evenly distribute gas-flow across the bubble diffuser plates (105); and
one or more flow straighteners (109) disposed within the plenum chamber (108) to maintain laminar gas-flow;
a plurality of outlet vents (110) configured to release treated gas;
wherein, the gas stream (111) is introduced into the rotary valve modulator (104), passes through the bubble diffuser plates (105) to form micro-bubbles (112) within the aqueous alkaline absorbent solution (102), and carbon dioxide is absorbed from these micro-bubbles (112) which chemically react with the aqueous alkaline absorbent solution (102) in the chamber (101).

2. The system (100) of claim 1, wherein the chamber (101) comprises a height of approximately sixty centimeters and a diameter of approximately twenty-two centimeters and is configured to contain between 8 and 10 liters of the aqueous alkaline absorbent solution (102).

3. The system (100) of claim 2, wherein the bubble diffuser plate (105) has a diameter of approximately sixteen centimeters, a thickness of approximately four millimeters, and comprises approximately 350 micro-orifices (106), each having a diameter of approximately 0.8 millimeters and spaced approximately five millimeters apart.

4. The system (100) of claim 2, wherein the motor (107) is configured to rotate the diffuser plates (105) at a speed between 3 and 4 revolutions per minute, and the generated micro-bubbles (112) have diameters ranging from 0.5 millimeters to 1.2 millimeters.

5. The system (100) of claim 2, wherein the air intake (103) is configured to provide a gas-flow rate between 3 and 5 liters per minute.

6. The system (100) of claim 1, wherein the chamber (101) comprises a height of approximately 1.2 meters and a diameter of approximately 35 to 40 centimeters and is configured to contain approximately one hundred liters of the aqueous alkaline absorbent solution (102) to a fill height of approximately 80 centimeters.

7. The system (100) of claim 6, wherein the bubble diffuser plate (105) has a diameter of approximately 32 centimeters, a thickness of approximately 6 millimeters, and comprises between 2,500 and 3,000 micro-orifices (106), each having a diameter of approximately 1 millimeter and spaced approximately 5 millimeters apart.

8. The system (100) of claim 6, wherein the motor (107) is configured to rotate the bubble diffuser plates (105) at approximately 5 revolutions per minute, and the system (100) is configured to handle a gas flow rate between 500 and 800 liters per minute and achieve a carbon dioxide capture efficiency between 80% and 85% in a single pass.

9. The system (100) of claim 1, wherein the rotary valve modulator (104) is further configured to produce pulsed, oscillatory gas-flow through alignment and misalignment of the micro-orifices (106) of the bubble diffuser plates (105) with a plurality of angular inlet ports, thereby generating periodic bursts of gas flow into the aqueous alkaline absorbent solution (102).

10. The system (100) of claim 1, wherein the micro-bubbles (112) generated have diameters ranging from 0.5 millimeters to 1.5 millimeters.

11. The system (100) of claim 1, wherein the reaction between carbon dioxide and the aqueous alkaline absorbent solution (102) results in formation of solid carbonate precipitates (113), which are collected at a lower part of the chamber (101).

12. The system (100) of claim 1, wherein the aqueous alkaline absorbent solution (102) comprises at least one of sodium carbonate and sodium hydroxide at a concentration ranging from 0.1 molar to 0.5 molar.

13. A method for capturing carbon dioxide using the system of claim 1, the method comprising:
directing a gas stream containing carbon dioxide from an industrial chimney or duct into the WBCC system through a sealed inlet duct;
introducing the gas stream into the rotary valve modulator; rotating the bubble diffuser plates at a predetermined speed to generate oscillatory airflow and micro-bubbles;
allowing the micro-bubbles to chemically react with the aqueous alkaline absorbent solution such that carbon dioxide is absorbed into the aqueous alkaline absorbent solution; and
releasing treated, carbon-free air through one or more vertically oriented outlet vents.

14. The method of claim 13, wherein the chimney (114) is sealed and connected to the WBCC system through a dedicated duct, such that no untreated exhaust is released directly into the atmosphere.

15. The method of claim 13, further comprising adjusting the rotation speed of the bubble diffuser plates in real-time to control bubble size and pulsing frequency based on variations in gas flow rate.