Apparatus for capturing carbon dioxide from atmospheric air

Abstract

The invention relates to an apparatus for capturing carbon dioxide from atmospheric air, the apparatus comprising: - a container (1), - an air inlet (3) and an air outlet (8), - a layer of filling bodies (7) arranged in the container (1) between the air inlet (3) and the air outlet (8) and - a distribution device (10) for distributing carbon dioxide binding liquid (9) arranged between the air inlet (3) and the layer of filling bodies (7), wherein the container (1) has a bag-like shape made of a liquid impermeable, flexible lining (2) suspended in a scaffolding framework (15). The invention further relates to a method of manufacturing such an apparatus.

Description

[0001] Apparatus for capturing carbon dioxide from atmospheric air

[0002] The invention relates to an apparatus for capturing carbon dioxide from atmospheric air. Additionally, the invention relates to the use of a set of construction elements for manufacturing such an apparatus and a method for manufacturing.

[0003] The increase of carbon dioxide in the atmosphere made by mankind since the industrial revolution is often underestimated. It has been shown that around 1 ,000 Gigatons of carbon dioxide have been released into the atmosphere by industrial development. This vast amount of carbon dioxide plays a significant role to climate change, the negative effects of which we are already experiencing today. The reduction of carbon dioxide emissions is no longer sufficient to reverse the effects of climate change. Rather, it has become clear that active removal of carbon dioxide from the atmosphere is necessary to have a positive outlook for a sustainable future. However, the large amounts of carbon dioxide that must be removed from the atmosphere in a short period of time require equipment that is inexpensive and can be installed in a short time. In addition, because carbon capture equipment will be needed in different regions of the world, it should be easily transportable.

[0004] Thus, an object of the present invention is to provide an apparatus for capturing carbon dioxide from atmospheric air that is low cost, easy to manufacture, and easy to transport. Further, it is an object of the invention to provide a use of low cost materials for manufacturing such a device. A further object of the invention is to provide a method of manufacturing such an apparatus for capturing carbon dioxide from atmospheric air.

[0005] The present invention provides solutions to the above-mentioned objects by proposing an apparatus for capturing carbon dioxide from atmospheric air according to claim 1 , a use of low-cost materials to manufacture such an apparatus according to claim 8 and a method for manufacturing a carbon dioxide capturing apparatus according to claim 9. Accordingly, the invention relates to an apparatus for capturing carbon dioxide from atmospheric air, the apparatus comprising:

[0006] - a container,

[0007] - an air inlet and an air outlet,

[0008] - a layer of filling bodies arranged in the container between the air inlet and the air outlet and

[0009] - a distribution device for distributing carbon dioxide binding liquid arranged between the air inlet and the layer of filling bodies, wherein the container has a bag-like shape made of a liquid impermeable, flexible lining suspended in a scaffolding framework.

[0010] The inventive apparatus for capturing carbon dioxide may in particular be a carbon dioxide absorber or air scrubber, which uses a chemical reaction to extract carbon dioxide from the atmospheric air. The chemical reaction takes place between the carbon dioxide binding liquid and the air passing the liquid. The carbon dioxide binding liquid may be caustic soda (NaOH solution). Preferably, the carbon dioxide binding liquid, especially caustic soda, binds carbon dioxide in the form of carbonate. In absorbing carbon dioxide from the atmospheric air, the caustic soda can be particularly formed into sodium carbonate (Na2CO3).

[0011] The invention is based on the general idea of reducing the cost of an apparatus for capturing carbon dioxide by separating the two tasks of preventing the leakage of the caustic solution and ensuring the mechanical stability of the apparatus. For the first task of preventing the leakage of the binding liquid from the apparatus, the container is made of a liquid-impermeable flexible lining. Such lining can be manufactured and installed at very low cost. The second task of providing mechanical stability is provided by the scaffolding framework. Such scaffolding can also be manufactured at very low cost. In particular, the scaffold framework can be made of a standardized or state-of- the-art construction scaffold. Such scaffolds are very easy to assemble in a short time and provide the necessary stability for the inventive apparatus.

[0012] In a preferred embodiment of the invention, the container, in particular the lining, is made of a tarpaulin, in particular a plastic-coated fabric tarpaulin. Such kinds of tarpaulins are, e.g., known from lorries or tractor trailers. Similar tarpaulins or plastic liners are also used in ponds, for roof sealing or in landfills to retain drainage water. In any event, such tarpaulins or plastic liners can be produced at very low cost and in very large quantities. Thus, the use of such materials in the manufacture of the carbon dioxide capture apparatus ensures that a significant amount of such apparatus can be produced in a reasonable time at a reasonable cost.

[0013] The container, in particular the lining, may include loops through which scaffolding elements, in particular ledges, of the scaffolding framework extend to keep the lining in the bag-like shape. In order to suspend the flexible lining in the scaffolding framework, it is preferred to use as few additional parts as possible. Therefore, providing loops at the lining or attaching the lining to the scaffolding elements, simplifies the construction which results in simplifying the manufacturing and lowering the cost of the apparatus.

[0014] The air outlet of the apparatus may be formed by a structurally stable air outlet frame connecting the container to an airduct, the air outlet frame being integrated into the lining of the container. Generally, the apparatus may include a blower device or a fan that blows air through the container. The blower device may be integrated into the airduct, thereby drawing air from the air inlet to the air outlet. However, the air flowing through the container and / or the duct creates a pressure differential that may act on the flexible liner, particularly at the air inlet and air outlet. In order to prevent the flexible lining from collapsing, the air outlet preferably comprises an air outlet frame for stabilizing the air outlet. The air outlet frame is preferably made of a dimensionally stable material. In particular, the inlet frame may be made of rigid plastics. The air outlet may also be an air inlet, if the air flow is reversed.

[0015] Generally, all parts of the apparatus, in particular the container, may be manufactured by inexpensive plastics or rubber materials. Preferred materials are polypropylene (PP), polyethylene (PE) or ethylenpropylenedyene monomer rubber (EPDM rubber). Other materials which are resistant to caustic solution can also be used.

[0016] Similar to stabilizing the air outlet, it is preferred that also the air inlet is dimensionally stable. Therefore, a preferred embodiment of the present invention provides for the air inlet being formed by an upper opening of the container, wherein the upper opening is stretched by the scaffolding framework, in particular an upper ledge frame of the scaffolding framework. The bag-like container can be suspended in the scaffolding framework such that the air inlet is formed by an upper opening of the bag-like container. On a lower end of the container, the air outlet may be formed. It is thus preferred that the air, which is drawn into the air inlet and through the container, enters the container at its top and is drawn downwards to the air outlet. The air inlet may be arranged in a horizontal plane. The air outlet can be arranged at a sidewall of the container, thus extending essentially in a vertical plane.

[0017] If the airflow is reversed, the air inlet may be used as air outlet. Thus the air outlet may be dimensionally stable by using the upper opening of the container to stretch the air outlet. The features and advantages as described in connection with the air inlet discussed above apply simultaneously to the air outlet when it is provided at the upper opening of the container.

[0018] In order to suspend the container in the scaffolding framework, loops may be provided to accommodate ledges of the scaffolding framework. In a preferred embodiment, an upper container edge includes loops that accommodate ledges of the scaffolding framework. The upper container edge may have a rectangular shape, each of the four sides of the rectangular upper container edge includes a loop. Thus, the upper container edge can be stretched between four ledges of the scaffolding framework, thus ensuring the dimensional stability of the air inlet. The ledges, in particular the upper ledges, of the scaffolding framework may therefore form a rectangular upper ledge frame of the scaffolding framework.

[0019] In a further preferred embodiment of the present invention, the container includes sidewalls and a base wall. The base wall may be perforated to allow air and / or liquid to pass through. The perforated base wall allows not only air to flow from the air inlet through the base wall towards the air outlet, but also allows for carbon dioxide binding liquid to exit the container. This allows liquid that has already absorbed carbon dioxide to exit the container and to be routed for further processing.

[0020] The layer of filling bodies may be supported by a net suspended within the scaffolding framework. Alternatively, the layer of filling bodies may be supported by the perforated base wall. In any case, the layer of filling bodies is preferably located within the container. In general, a large exchange surface is preferred for the most effective absorption of carbon dioxide from air. The filling elements provide for such an increased exchange surface. Carbon dioxide binding liquid is sprayed onto the filling bodies and distributed over the surface of the filling bodies. To support the weight of the filling bodies, a net may be provided that is suspended directly from the scaffolding framework. Alternatively, the base wall of the container can support the weight of the filling bodies. In this case, the base wall is preferably made of a plastic-coated fabric tarpaulin.

[0021] According to a further aspect, the invention relates to the use of a set comprising a scaffolding framework and a bag-like container made of a liquid impermeable, flexible lining for manufacturing an apparatus for chemically extracting carbon dioxide from atmospheric air. In particular, the scaffolding framework and the bag-like container are used to produce the above-described apparatus. The scaffolding framework may be a state of the art construction scaffolding. Using the construction scaffolding and a baglike container of a flexible lining provides for a very low-cost manufacturing of a carbon dioxide absorber apparatus.

[0022] Another aspect of the present invention is providing a method for manufacturing a carbon dioxide capturing apparatus, in particular an above-mentioned apparatus.

[0023] The inventive method preferably comprises:

[0024] - providing a kit of scaffolding elements;

[0025] - connecting the scaffolding elements to form a, preferably cuboidal, scaffolding framework;

[0026] - providing a flexible lining made of a liquid impermeable material; attaching the lining to the scaffolding framework such that the lining forms a bag-like container within the scaffolding framework; and installing a distribution device for distributing carbon dioxide binding liquid above or in the area of an intlet opening of the container. In a preferred embodiment of the inventive method, the container is filled with filling bodies to increase the contact surface between air and carbon dioxide binding liquid, wherein the container has a base wall made of the lining and being perforated to allow for the passage of air and / or carbon dioxide binding liquid.

[0027] The further features and advantages of the above-described apparatuses also apply to the inventive method for manufacturing such an apparatus.

[0028] Another aspect of the invention relates to a modular system including at least two apparatus as described above, wherein the scaffolding frameworks of the apparatus are interconnected to form a combined framework structure supporting a plurality of the containers.

[0029] The invention is explained in more detail below with reference to an exemplary embodiment in accordance with the accompanying schematic drawings. In the drawings

[0030] Fig. 1 shows a cross section of an inventive apparatus according to a preferred embodiment;

[0031] Fig. 2 shows a perspective view of the scaffolding framework and the container of the apparatus according to Fig. 1 ;

[0032] Fig. 3 shows a perspective cross section of the scaffolding framework and the container according to Fig. 2;

[0033] Fig. 4 shows a cross section of an inventive apparatus according to another preferred embodiment;

[0034] Fig. 5 shows an modular system including an apparatus according to Fig. 1 ; and

[0035] Fig. 6 shows a carbon dioxide capture plant formed by a plurality of modular systems according to Fig. 5.

[0036] Fig. 1 shows an apparatus for capturing carbon dioxide from atmospheric air. In general, the apparatus includes a container 1 , an air inlet 3 and an air outlet 8. The container 1 is preferably made of a lining 2. The lining 2 may be a plastic-coated fabric tarpaulin. For illustration purposes, the scaffolding framework 15 of the apparatus is not illustrated in Fig. 1 .

[0037] The container 1 is preferably shaped like a bag and may include a reaction chamber 14 and a collecting chamber 13. At least the reaction chamber 14 includes sidewalls 14a. The reaction chamber 14 may be separated from the collecting chamber 13 by a base wall 6. The base wall 6 can be suspended within the scaffolding framework 15. Alternatively, a net can be arranged between the reaction chamber 14 and the collecting chamber 13. The net may be suspended within the scaffolding framework 15 (not shown in Fig. 1 ).

[0038] The reaction chamber 14 is at least in part filled with a layer of filling bodies 7. The filling bodies 7 are supported by the base wall 6 or the net. The base wall 6 may be perforated to allow air and caustic solution 9 to pass through.

[0039] The air inlet 3 may be formed by an upper opening of the container 1 , in particular the reaction chamber 14. Preferably, the air inlet 3 is arranged above the layer of filling bodies 7. A distribution device 10 is arranged between the air upper opening of the container and the layer of filling bodies 7. The distribution device 10 may be a sprinkler system that distributes the caustic solution 9 over the layer of filling bodies 7.

[0040] The air outlet 8 is preferably arranged at a lower part of the apparatus, in particular in the collecting chamber 13. The collecting chamber 13 is defined as the part below the net or base wall 6 supporting the layer of filling bodies 7. The air outlet 8 may be arranged at a sidewall of the collecting chamber 13. The air outlet 8 may be formed by an structurally stable air outlet frame 18, especially made of rigid plastics. The air outlet frame 18 may support the lining 2. The air outlet 8 is attached to an airduct 5a which comprises a fan 5. The fan 5 pushes air out of the air outlet 8, thus drawing air from the air inlet 3 towards the air outlet 8 and generating an airflow between the air inlet 3 and the air outlet 8.

[0041] The apparatus further may comprise a circuit for caustic solution 9. The caustic solution circuit includes a pump 4 for transporting the caustic solution 9 from the collecting chamber 13 to the distribution device 10. The caustic solution circuit further includes a filter 11 for filtering carbonate from the caustic solution 9. A carbonate outlet 12 is provided for the carbonate to exit the caustic solution circuit. The carbonate usually is a solid material.

[0042] The apparatus for capturing carbon dioxide from atmospheric air works as follows. Atmospheric air enters the container 1 through the air inlet 3 and is drawn through the layer of filling bodies 7. Caustic solution 9 is distributed over the layer of filling bodies 7 thus wetting the surface of the filling bodies 7 with the caustic solution 9. Air passing the wetted surface of the filling bodies 7 releases carbon dioxide to the caustic solution 9. In other words, the caustic solution 9, which preferably is caustic soda, absorbs carbon dioxide and thus removes carbon dioxide from the atmospheric air. The caustic solution 9 enriched with carbon dioxide falls down through the layer of filling bodies 7 and through the perforated base wall 6 into the collecting chamber 13. Also the air entering the container 1 through the air inlet 3 is drawn through the perforated base wall 6. The carbon dioxide reduced air exits the collecting chamber 13 via the air outlet 8 and is released to the atmosphere. The caustic solution enriched with carbon dioxide, in particular the sodium hydrogen carbonate, is released from the collecting chamber 13 by being pumped through the caustic solution circuit by means of the pump 4. The pump 4 transports the carbon dioxide enriched solution to the filter 1 1 . In the filter 11 , the carbonate present in the solution is extracted and released through the carbonate outlet 12. The caustic solution 9 can then be reused by distributing it over the layer of filling elements 7 and again binding carbon dioxide from the atmospheric air.

[0043] In order to provide for an inexpensive construction of the inventive apparatus, it is preferred that the container 1 is made of a lining 2. The lining 2 is preferably liquid impermeable and flexible. The lining 2 can be made of a tarpaulin, in particular a plastic-coated fabric tarpaulin.

[0044] Fig. 2 shows such a lining 2 suspended in a scaffolding framework 15. The scaffolding framework 15 may be a state of the art construction scaffolding used in the construction of buildings. This makes the scaffolding framework 15 very inexpensive and easy to erect. The lining 2 forming the bag-like container 1 is hinged or suspended within the scaffolding framework 15. As shown in Fig. 2, the scaffolding framework 15 has preferably a cubic or cuboidal shape. The lining 2 is suspended within the inner volume of this cuboidal shape of the scaffolding framework 15. The scaffolding framework 15 may be made of scaffolding elements like ledges 15a and vertical columns 15b. Additionally, diagonal bars 15c may be attached to the vertical columns 15b and / or the ledges 15a, to stiffen the scaffolding framework.

[0045] In order to attach the lining 2 to the scaffolding framework 15, the lining 2 may include loops 16. The loops 16 may be designed such as to accommodate ledges 15a.

[0046] In particular, the container 1 may have an upper container edge 17. The upper container edge 17 may include several loops 16. Upper ledges 15a of the scaffolding framework 15 may extend through the loops. Thus, the bag-like container 1 is hinged within the scaffolding framework 15.

[0047] The container 1 , in particular the lining 2, preferably has sidewalls 14a which extend inside the scaffolding framework 15 in a vertical direction. The sidewalls 14a basically connect the upper container edge 17 to a base wall 6 (Fig. 3). In order to support the base wall 6 and to strengthen the construction of the apparatus, additional loops 16 may be attached to or arranged on the sidewalls 14a, preferably in the area of the base wall 6. These additional loops 16 are preferably mounted to the scaffolding framework 15. In particular, horizontal ledge 15a may extend through these additional loops 16.

[0048] Fig. 2 further shows the air outlet 8. The air outlet 8 is made of an opening in the lining 2. The opening is preferably arranged at a sidewall of the container 1 . The opening is attached, preferably fixed, to an air outlet frame 18. The air outlet frame 18 is preferably made of an light-weight and low-cost plastic material. In particular, the air outlet frame 18 may be made of a rigid plastic material. The rigid plastic material frame allows for the air outlet to remain dimensionally stable. Additionally, the rigid plastic material of the air outlet frame 18 allows for an airtight connection to the duct 5a which connects the air outlet 8 to the fan 5.

[0049] In the cross-sectional view of Fig. 3, it is shown that the distribution device 10 for distributing carbon dioxide binding liquid, in particular caustic soda, is arranged in the area of an air inlet 3. The distribution device 10 preferably includes a plurality of sprinkler pipes arranged in parallel to each other. The sprinkler pipes may include sprinkler openings to distribute the caustic solution over the cross-sectional area of the reaction chamber 14. The reaction chamber 14 is preferably filled with the layer of filling bodies 7. The filling bodies 7 may comprise ball-shaped elements. To support the layer of filling bodies 7, the container 1 includes a perforated base wall 6. The base wall 6 may be integrally formed with the sidewalls 14a. Alternatively, the base wall 6 may be attached to the sidewalls 14a, for example by sewing and / or glueing.

[0050] Generally, the apparatus is made of materials which are inexpensive. In particular, the container 1 may be made of a plastic lining which is resistant to caustic solution. The scaffolding framework 15 may be made of steel, like it is common for construction scaffolding. The distribution device 10 may also be made of plastic tubes or plastic pipes. In summary, the apparatus is inexpensive to manufacture and can be erected in a short time. In addition, the parts of the apparatus are light and can be easily transported to the regions where they are needed. All in all, this contributes to the rapid installation of carbon dioxide capture equipment in large quantities. In this way, large quantities of carbon dioxide can be removed from the atmosphere in a short space of time at low cost, contributing to a rapid solution to the climate crisis.

[0051] Fig. 4 shows an alternative embodiment of the apparatus as already described in connection with Fig. 1. The difference between the embodiment according to Fig. 1 and the embodiment of Fig. 4 is the direction of airflow. In Fig. 4, the airflow is reversed, i.e. the air enters the apparatus via the airduct 5a and the air inlet 3 at the bottom of the container 1 and exits the container 1 via the upper opening provided by the upper container edge 17, whereas in the embodiment of Fig. 1 , the air enters the apparatus via the upper container opening that serves as the air inlet 3 and exits the container 1 via the lower positioned air outlet 8 into the airduct 5a. In general, the air can flow through the container 1 in the same direction as the caustic solution 9 flows through the container 1 . Alternatively, the air can also flow in the opposite direction, in particular against the direction of flow of the caustic solution 9 (Fig. 4).

[0052] A particular advantage of the inventive apparatus is its flexibility with regard not only to transporting and assembling the apparatus, but also to provide options for combining several apparatus to form a modular system 100 of at least two apparatus.

[0053] The modular system may include several scaffolding elements 15a, 15b, 15c that may be combined or interconnected to form a scaffolding framework 15. The scaffolding frameworks 15 of at least two apparatus may then be combined to form a framework structure including a plurality of containers 1 . Such a modular system 100 is for example shown in Fig. 5. The modular system 100 includes several containers 1 and several scaffolding frameworks 15 that are interconnected to form a combined framework structure 150. The combined framework structure 150 supports the plurality of containers which in general are designed as described above. In particular, each of the containers 1 includes a lower mouth 105 that may serve as an air inlet 3 or an air outlet 8. Furthermore, the containers may have common upper vents 110. Each upper vent 110 may be connected to two upper container openings of two containers 1 that are arranged adjacent to each other. The upper vents 110 may also serve as an air outlet 8 or air inlet 3 respectively, depending on the functionality of the lower mouth 105.

[0054] The modular system 100 may also be combined with a caustic solution treatment system 120. The caustic solution treatment system may be a combined system that eliminates the need of several circuits for caustic solution treatment for each of the containers 1 . Rather, the several containers 1 combined to build the modular system 100 may be connected to a single caustic solution treatment system 120. The caustic solution treatment system may include the pump 4, the filter 11 , and the carbonate outlet 12. The caustic solution treatment system 120 may be fluidly connected to distribution devices 10 that are arranged at each of the containers 1 . Also, the connecting chambers 13 of each of the containers 1 may be fluidly connected to transport the carbon dioxide enriched caustic solution to the caustic solution treatment system 120.

[0055] The modular system 100 is scalable and can be combined with other modular systems 100 to form a carbon dioxide capture plant. Fig. 6 shows a possible arrangement of several modular systems 100 to provide a carbon dioxide capture plant that is able to remove a high amount of carbon dioxide from ambient air.

[0056] Generally, to form the modular system 100, several containers can be stacked and arranged adjacent to each other within the framework structure 150 of scaffolding frameworks 15. In order to build a plant of several modular systems 100, the modular systems 100 can also be stacked and / or arranged adjacent to each other as shown in Fig. 6. As the apparatus is very easy to transport and can be assembled in short time, the construction of such a modular system 100 or a plant comprising several modular systems 100 is possible at low costs and within a short amount of time.

[0057] Reference signs

[0058] 1 container

[0059] 2 lining

[0060] 3 air inlet

[0061] 4 pump

[0062] 5 fan

[0063] 5a air duct

[0064] 6 base wall

[0065] 7 filling bodies

[0066] 8 air outlet

[0067] 9 caustic solution

[0068] 10 distribution device

[0069] 11 filter

[0070] 12 carbonate outlet

[0071] 13 collecting chamber

[0072] 14 reaction chamber

[0073] 14a sidewalls

[0074] 15 scaffolding framework

[0075] 15a ledge

[0076] 15b vertical column

[0077] 15c diagonal bar

[0078] 16 loop

[0079] 17 upper container edge

[0080] 18 air outlet frame

[0081] 100 modular system

[0082] 105 lower mouth

[0083] 110 upper vent

[0084] 120 caustic solution treatment system

[0085] 150 framework structure

Claims

Claims1 . Apparatus for capturing carbon dioxide from atmospheric air, the apparatus comprising:- a container (1 ),- an air inlet (3) and an air outlet (8),- a layer of filling bodies (7) arranged in the container (1 ) between the air inlet (3) and the air outlet (8) and- a distribution device (10) for distributing carbon dioxide binding liquid (9) arranged between the air inlet (3) and the layer of filling bodies (7), wherein the container (1 ) has a bag-like shape made of a liquid impermeable, flexible lining (2) suspended in a scaffolding framework (15).

2. Apparatus according to claim 1 characterized in that the container (1 ), in particular the lining (2), is made of a tarpaulin, in particular a plastic-coated fabric tarpaulin.

3. Apparatus according to claim 1 or 2 characterized in that the container (1 ), in particular the lining (2), includes loops (16) through which scaffolding elements, in particular ledges (15a), of the scaffolding framework (15) extend to keep the lining (2) in the bag-like shape.

4. Apparatus according to any of the preceding claims characterized in that the air inlet (3) is formed by an upper opening of the container (1 ), the upper opening being stretched by the scaffolding framework (15), in particular an upper ledge frame of the scaffolding framework (15).

5. Apparatus according to any of the claims 1 to 3 characterized in that the air outlet (8) is formed by an upper opening of the container (1 ), the upperopening being stretched by the scaffolding framework (15), in particular an upper ledge frame of the scaffolding framework (15).

6. Apparatus according to any of the preceding claims characterized in that the container (1 ) includes side walls (14a) and a base wall (6), the base wall (6) being perforated to allow air to pass through.

7. Apparatus according to any of the preceding claims characterized in that the layer of filling bodies (7) is supported by a net suspended within the scaffolding framework (15).

8. Use of a set comprising a scaffolding framework (15) and a bag-like container (1 ) made of a liquid impermeable, flexible lining (2) for manufacturing an apparatus for chemically extracting carbon dioxide from atmospheric air, in particular an apparatus according to any of the preceding claims.

9. Method for manufacturing a carbon dioxide capturing apparatus, in particular an apparatus according to any of claims 1 to 7, the method comprising:- providing a kit of scaffolding elements (15a, 15b, 15c);- connecting the scaffolding elements (15a, 15b, 15c) to form a, preferably cuboidal, scaffolding framework (15);- providing a flexible lining (2) made of a liquid impermeable material;- attaching the lining (2) to the scaffolding framework such that the lining (2) forms a bag-like container within the scaffolding framework (15); and installing a distribution device (10) for distributing carbon dioxide binding liquid (9) above or in the area of an outlet opening of the container (1 ).

10. Method according to claim 9 characterized in that the container (1 ) is filled with filling bodies (7) to increase the contact surfacebetween air and carbon dioxide binding liquid (9), the container (1) having a base wall (6) formed by the lining (2) and being perforated or net-like structure to allow for the passage of air.11 . Modular system (100) having at least two apparatus according to any of claims 1 to 7, wherein the scaffolding frameworks (15) of the apparatus are interconnected to form a combined framework structure (150) supporting a plurality of the containers (1).

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