CO2 separation module for a CO2 separation device for separating CO2 from a supplied air stream

Abstract

A CO2 separation module (10) for a CO2 separation device for separating CO2 from a supplied air stream (104) is presented, comprising a receiving chamber (16) for receiving a CO2 separation agent (18), wherein the receiving chamber (16) has, in a circumferential direction (20), two air-permeable first chamber walls (22) arranged opposite one another and two second chamber walls (24) arranged opposite one another, wherein the two air-permeable first chamber walls (22) and at least one of the two second chamber walls (24), in particular the two second chamber walls (24), of the receiving chamber (16) are jointly formed from a one-piece, curved, air-permeable plate (26).

Description

State of the art

[0001] The invention relates to a CO2 separation module for a CO2 separation device for separating CO2 from a supplied air stream, comprising a receiving chamber for receiving a CO2 separation agent, wherein the receiving chamber has two air-permeable first chamber walls arranged opposite one another in a circumferential direction and two second chamber walls arranged opposite one another, a supply channel arranged adjacent to one of the two air-permeable first chamber walls and fluidically connected via said walls to the receiving chamber in order to guide the air stream through the receiving chamber and the CO2 separation agent; and a discharge channel arranged adjacent to the other of the two air-permeable first chamber walls and fluidically connected via said walls to the receiving chamber in order to discharge the CO2-reduced air stream from the receiving chamber and the CO2 separation agent.The invention further relates to a CO2 separation device with such a CO2 separation module and a method for producing such a CO2 separation module.

[0002] In order to limit the warming of the Earth's atmosphere, so-called DAC systems (Direct Air Capture) are used to separate or remove CO2 (carbon dioxide) from the air.

[0003] WO 2020 / 212146 A1 discloses a DAC system with a container solution, wherein six separation chambers arranged in series and operable in parallel are provided inside the container.

[0004] US 2020 / 0391153 A1 describes a gas separation device with a ribbed structure in which a space that can be filled with sorption materials for CO2 is traversed by heat exchanger lines and heat exchanger fins.

[0005] WO 2014 / 170184 A1 discloses a gas separation device with stacked layers comprising a rigid frame on which flexible cloths are stretched on both sides. Particulate sorbent is arranged inside the layers and can be introduced through holes provided in the frame. Disclosure of the invention

[0006] The present invention therefore relates to a CO2 separation module according to the type described in the introduction, wherein the two air-permeable first chamber walls and at least one of the two second chamber walls, in particular the two second chamber walls, of the receiving chamber are jointly formed from a one-piece curved air-permeable plate.

[0007] The present invention further relates to a CO2 separation device with a CO2 separation module according to the type described above.

[0008] The present invention also relates to a method for producing a CO2 separation module according to the type described above, wherein the spacer elements are produced by means of a pressure forming process.

[0009] For a CO2 capture or sorption process, thin layers or layers of a CO2 capture agent or sorbent are advantageous to minimize pressure losses. However, this requires flat support structures in which the CO2 capture agent, for example, in granular or particulate, fibrous, or mat-shaped form, remains stationary.

[0010] It is therefore proposed that the two air-permeable first chamber walls and at least one of the two second chamber walls, in particular the two second chamber walls, of the receiving chamber be jointly formed from a one-piece, curved, air-permeable plate. This makes it possible to provide a CO2 separation module that can be manufactured simply and cost-effectively, for example, using a continuous sheet metal bending process, with a receiving chamber that withstands mechanical stresses, such as those known from the cycling of, for example, granular or particulate, fibrous, or mat-shaped sorbents, and into which such sorbents can also be easily introduced and / or removed.

[0011] According to the invention, the CO2 separation module has a receiving chamber for receiving a CO2 separation agent, wherein two air-permeable first chamber walls arranged opposite one another and two second chamber walls arranged opposite one another are provided in a circumferential direction. According to the invention, the two air-permeable first chamber walls and at least one of the two second chamber walls, in particular the two second chamber walls, of the receiving chamber are jointly formed or shaped from a one-piece, i.e. one-piece or individual curved, air-permeable plate. Thus, the receiving chamber is delimited in its circumferential direction by chamber walls or outer walls, of which the first chamber walls and at least one of the two second chamber walls, in particular the two second chamber walls, are formed from a one-piece, i.e. one-piece or individual curved, air-permeable plate.Understandably, the individual curved air-permeable plate is designed to be bendable or flexible. Furthermore, the individual curved air-permeable plate is preferably designed to be stretchable or elastic.

[0012] The receiving chamber is preferably designed to be closed in the circumferential direction. In this case, the receiving chamber preferably has the two first chamber walls and the two second chamber walls in the circumferential direction, which form a closed outer surface of the receiving chamber. The circumferential direction is, understandably, a circumferential direction of the receiving chamber.

[0013] The receiving chamber is preferably flat or layered, particularly as a layered receiving chamber. The flat design allows for better absorption of the forces occurring.

[0014] The one-piece, curved, air-permeable plate is preferably designed as a perforated or perforated metal plate, in particular a perforated or perforated metal sheet or expanded metal sheet or woven wire mesh or metal mesh. The one-piece, curved, air-permeable plate is further preferably impermeable to the CO2 separation agent, in particular a granular or particulate and / or fibrous CO2 separation agent (to be used).

[0015] Expanded metal sheeting is particularly advantageous due to its flexible and stretchable, or elastic, properties. Wire mesh structures, such as those used for ventilating storage silos, can also be advantageously constructed in a multilayer structure, where a fine structure that securely retains the CO2 capture agent is mechanically supported by a coarser structure. This allows for the production of mechanically stable, yet formable, air-permeable panels with minimal pressure loss.

[0016] Preferably, for particularly fine CO2 separation agents, it can be provided that the receiving chamber is additionally covered inside or outside with a polymer fleece or a membrane before or after shaping.

[0017] The receiving chamber can be joined to its structure, for example, by bending and flanging a suitably designed, air-permeable endless band. Joining two wall ends can be achieved, for example, by folding or flanging, since no airtight seal is required, but only flow guidance and retention of the CO2 separation agent. Fixing the structures can be achieved solely by the bending process and / or additionally or exclusively by folding or flanging and / or additionally or exclusively by other known form-fitting or material-fitting connection methods such as rivets, screws, spot welding, friction welding, and adhesive bonding.

[0018] Advantageously, the receiving chamber has at least one opening, in particular two openings arranged opposite one another, for introducing and / or discharging the CO2 separation agent, wherein the at least one opening is delimited by the two air-permeable first chamber walls and at least one of the two second chamber walls, in particular the two second chamber walls. In this case, the at least one opening preferably extends over substantially the entire longitudinal extent and vertical extent of the receiving chamber. Thus, the receiving chamber can, for example, only have the chamber walls arranged in the circumferential direction and be open on the two remaining sides, i.e. have the two openings arranged opposite one another.the two air-permeable first chamber walls arranged opposite one another can be arranged on an upper side and a lower side of the receiving chamber, the two second chamber walls arranged opposite one another can be arranged on an upstream side and an downstream side of the CO2 separation module and the at least one opening can be arranged on a transverse side arranged transversely to the upstream side and the downstream side or the two openings arranged opposite one another can be arranged on the two transverse sides arranged transversely to the upstream side and the downstream side.

[0019] At least one of the two openings can be designed to be temporarily closable. Thus, at least one of the two openings can be designed to be closable, for example, after the introduction of the CO2 separation agent and to be opened again for the discharge or replacement of the CO2 separation agent. The other opening can be permanently closed, for example.

[0020] A permanently sealed opening can be achieved, for example, solely by folding or flanging, and / or additionally or exclusively by folding or flanging, and / or additionally or exclusively by other known form-fitting or material-locking connection methods such as rivets, screws, spot welding, friction welding, or gluing. This is possible because no airtight seal is required, but only a flow guide and retention of the CO2 separation agent.

[0021] An opening designed for temporary closure can be designed to be opened without tools, either as a sliding cover with guide grooves, by clamping with spring elements, a bayonet lock, or with tools, for example, by screw connections. In particular, one side is secured via a swivel joint, particularly a detachable swivel joint, so that the side to be secured allows quick access for changing the CO2 separation medium.

[0022] In the case that the CO2 separation means is mat-shaped, it is advantageous if both oppositely arranged openings can be opened so that the mat can also be pulled through the receiving chamber instead of just being pushed into it.

[0023] It is advantageous if at least one heating element, in particular a heating tube or heating rod or an air-permeable heating mat or heating grid, is provided, which is arranged in the receiving chamber and can be inserted and / or removed via the at least one opening. Alternatively or additionally, the curved air-permeable plate can also be designed to be heatable.

[0024] The CO2 separation module further comprises a supply channel which is arranged adjacent to one of the two air-permeable first chamber walls and is fluidically connected via this to the receiving chamber in order to guide the air flow through the receiving chamber and the CO2 separation means (during operation). The supply channel can have a plurality of sub-channels. The supply channel can be flat or layered, in particular as a supply channel layer. The supply channel can taper from the upstream side of the CO2 separation module to the downstream side of the CO2 separation module, i.e., in the flow direction of the air flow, in particular continuously or constantly. The supply channel is preferably closed on the downstream side, but is not necessarily air-tight.

[0025] The CO2 separation module also has a discharge channel, which is arranged adjacent to the other of the two air-permeable first chamber walls and is fluidly connected to the receiving chamber via this in order to discharge the CO2-reduced air flow from the receiving chamber and the CO2 separation agent (during operation). The discharge channel can have a plurality of sub-channels. The discharge channel can be flat or layered, in particular as a discharge channel layer. The discharge channel can widen from the upstream side of the CO2 separation module to the downstream side of the CO2 separation module, i.e. in the flow direction of the CO2-reduced air flow, in particular widen continuously or constantly. The discharge channel is preferably closed on the upstream side, but is not necessarily air-tight.

[0026] Advantageously, the receiving chamber is arranged between the supply channel and the discharge channel in such a way that the air flow from the supply channel can be guided through the receiving chamber and the two air-permeable first chamber walls into the discharge channel. In other words, the supply channel, the receiving chamber, and the discharge channel can form a sandwich-type arrangement.

[0027] The CO2 separation module preferably has an arrangement stacked in a stacking direction of the CO2 separation module with a plurality of receiving chambers, supply channels, and discharge channels, wherein a supply channel and a discharge channel are arranged alternately between the receiving chambers in the stacking direction. The receiving chambers, the supply channels, and the discharge channels can be layered. In other words, the receiving chambers or receiving chamber layers, the supply channels or supply channel layers, and the receiving chambers or discharge channel layers are arranged alternately and adjacent to one another, forming a stacked layer arrangement or stack. The receiving chambers or receiving chamber layers can be aligned, for example, at an angle of less than 30° to the horizontal or substantially horizontally.

[0028] The stack is preferably designed to be airtight on a top and / or bottom side, so that the air flow cannot escape from the CO2 separation module on these sides. This can be achieved, for example, by means of an appropriate coating and / or a closed stack wall, in particular a closed metal wall or metal plate.

[0029] Advantageously, a spacer element is arranged in each of the supply channels and / or in the discharge channels, which spacer element is connected to the two adjacent first chamber walls of the respective or adjacent receiving chambers, wherein the spacer element is formed from a curved, in particular air-permeable plate. The spacer elements preferably have a wave shape and are in particular elastic. It is particularly advantageous if the spacer elements are designed as a perforated metal plate, in particular perforated metal sheet or expanded metal sheet or woven wire mesh or metal knitted fabric. Further preferably, the chamber walls and the spacer elements are formed from the same perforated metal plate, in particular perforated metal sheet or expanded metal sheet or woven wire mesh or metal knitted fabric.

[0030] Preferably, the spacer elements extend over a substantially entire longitudinal extent and transverse extent of the first chamber walls.

[0031] It is advantageous if the supply channels and / or the discharge channels together with the respective spacer elements have a varying height in a flow direction of the air flow (during operation), in particular the supply channels with the respective spacer elements are designed to taper continuously from the inflow side of the CO2 separation module to the outflow side of the CO2 separation module, i.e. in the flow direction of the air flow, and / or the discharge channels with the respective spacer elements are designed to widen continuously from the inflow side of the CO2 separation module to the outflow side of the CO2 separation module, i.e. in the flow direction of the CO2-reduced air flow.

[0032] The spacing elements of the supply channels are preferably of identical design. The spacing elements of the discharge channels are preferably of identical design. Further preferably, the spacing elements of the supply channels and the discharge channels are of identical design. In particular, the supply channels with the spacing elements and the discharge channels with the spacing elements can be of identical design and arranged in the stack merely rotated by 180° (around the stacking direction) relative to one another.

[0033] The spacer elements serve to mechanically support or "keep open" the supply and discharge channels, as well as to guide the air flow longitudinally. Due to the appropriate design of the spacer elements, the air-permeable first chamber walls or plates of the receiving chambers can bulge or bend into the unsupported areas of the supply and discharge channels when the CO2 separation agent or sorbent expands, particularly during the hot and humid desorption process. Since the support is preferably realized in a wave shape, the forces generated are evenly distributed, and thermal expansion during desorption or changes in the material volume of the sorbent during cyclic adsorption and desorption within one or more receiving chambers with air guidance are compensated for. The elastic overall structure consisting of the chamber walls and the spacer elements resets upon cooling.Furthermore, the air flow creates less flow resistance in the supply and discharge ducts.

[0034] Geometric optimization of the waveform follows the design aspects for branched flow channels known from other stacked systems such as plate heat exchangers, fuel cell stacks, and electrolyzer stacks. For example, the height and width of the wave can be adjusted depending on the desired air flow for the respective application, the volume of the receiving chamber, and the performance characteristics of the adsorber material.

[0035] According to the invention, the spacer elements are manufactured using a pressure forming process. The air-permeable plates can be profiled in a wave-like manner, for example, by embossing, to obtain the wave-shaped spacer elements. When manufactured as an "endless strip," it is also possible to stack two strips alternately in a zigzag fold and / or to fold them mirror-image at the receiving chamber during production. The manufacturing direction of a spacer element would be transverse or perpendicular to the direction of the taper or widening, i.e., transverse to the direction of the air flow during operation.

[0036] The CO2 separation agent is designed to separate CO2 from a supplied air stream. The CO2 separation agent is preferably arranged in the receiving chamber. The CO2 separation agent is preferably solid. The CO2 separation agent can, for example, be particulate, fibrous, or mat-shaped. The CO2 separation agent can, in particular, comprise a solid (appropriately functionalized) sorbent, for example an adsorbent and / or an absorbent. Accordingly, the CO2 separation agent can, for example, have a particulate, fibrous, or nonwoven solid as a carrier structure with a base material selected from the group consisting of: resins, polymers, ceramics, zeolites, silicates, organometallic compounds, organic materials such as cellulose or activated carbon, and combinations thereof.The base material can, in turn, be specifically functionalized with amines, potassium carbonate, or other components designed to chemically or physically bind CO2. The CO2 separation agent can also be designed to be permeable to air.

[0037] The CO2 separation agent can comprise or be formed as a granular ion exchange resin. The CO2 separation agent can, for example, comprise or consist of granular Lewatit VP OC 1065 or zeolite X13.

[0038] If the CO2 separation agent is granular, e.g., in the form of a granular ion exchange resin, the CO2 separation module can be filled by first suspending the granular ion exchange resin (at least temporarily) in a liquid during filling, particularly by slurrying it in water. This suspension is then poured into the receiving chamber(s) of the CO2 separation module. Since at least the first chamber walls of the receiving chamber are permeable to air, the liquid can drain or flow away unhindered, while the granular CO2 separation agent or ion exchange resin remains in the receiving chamber.

[0039] In other words, during filling, a liquid is used to fluidize the granular CO2 separation agent and the air-permeable first chamber walls are used as a filter or sieve to filter out the suspended granular CO2 separation agent from the liquid during filling.

[0040] The liquid is preferably water. The advantage here is that water is omnipresent in the humid air during the sorption process and in the form of water vapor during the desorption process for years, so it does not interfere with the filling process or later in the CO2 capture device. However, the liquid can also be a solvent, in particular a solvent used for the production of the granular CO2 capture agent.

[0041] Consequently, a combination or suspension comprising ion exchange resins and water is particularly advantageous, since ion exchange resins were developed for use in water and form dense fluidized packings there, which, however, can be easily moved due to the comparable density and the spherical design.

[0042] If the receiving chamber has a second opening through which the granular CO2 separation agent could escape during filling, this opening is closed, at least for the filling step, by means of a closure element that is impermeable to the granular CO2 separation agent. The closure element can be designed to be airtight. The closure element can be designed, for example, as a closed chamber wall, in particular a closed metal wall or metal plate.

[0043] After the filling step, the still-open opening is then preferably closed by means of a (further) closure element, so that the granular CO2 separation agent remains in the receiving chamber. The (further) closure element is thus impermeable at least to the granular CO2 separation agent. The (further) closure element can be designed to be airtight. The (further) closure element can be designed, for example, as a closed chamber wall, in particular a closed metal wall or metal plate.

[0044] The filling step can be carried out using a filling device, wherein the suspension is filled through the opening into the at least one receiving chamber, in particular into several or all receiving chambers simultaneously, by means of at least one supply line and / or filling aperture. Advantageously, the CO2 separation module can be rotated before the filling step such that the opening(s) for the filling step point upward.

[0045] The CO2 separation module is designed for use in a CO2 separation device for separating CO2 from a supplied air stream by means of a CO2 separation process. Within the scope of the present invention, the term "separation" encompasses any reasonable type of separation or capture of CO2 (carbon dioxide) from the air, wherein a binding and / or adhesion and / or storage and / or absorption of CO2 molecules occurs on a CO2 separation agent.

[0046] In this case, the CO2 separation module or CO2 separation device can be designed, in particular, to separate the CO2 from the supplied air stream by means of a CO2 separation process, in which the separation occurs with the release of energy or heat to the air stream. The CO2 separation process preferably comprises a sorption process, in particular an adsorption process and / or an absorption process. Accordingly, the CO2 separation can be carried out, in particular, by means of at least one of the following methods or combinations thereof: - chemical adsorption process - physical adsorption process - chemical absorption process - physical absorption process

[0047] The CO2 separation module or CO2 separation device is further configured to release CO2 from the CO2 separation medium by means of a CO2 release process. Within the scope of the present invention, the term "release" encompasses any reasonable method of releasing or expelling CO2 (carbon dioxide) from the CO2 separation medium, whereby a dissolution and / or release and / or discharge of CO2 molecules from the CO2 separation medium occurs.

[0048] In this case, the CO2 separation module or the CO2 separation device is particularly designed to release or dissolve the CO2 from the CO2 separation agent by means of a CO2 release process in which the CO2 is released from the CO2 separation agent by introducing energy or heat into the latter.

[0049] The CO2 release process preferably includes a desorption process. Accordingly, the CO2 release can be carried out in particular by at least one of the following processes or combinations thereof: - chemical desorption process - physical desorption process

[0050] Preferably, the CO2 separation device is configured to perform the CO2 separation process and the CO2 release process cyclically. In this case, the CO2 separation device is particularly configured to perform the sorption process and the desorption process cyclically. The basic functionality of the CO2 separation module or the CO2 separation device can be implemented, for example, analogously to the aforementioned WO 2020 / 212146 A1 and US 2020 / 0391153 A1.

[0051] Within the scope of the present invention, the term "supply" or "supplied" primarily encompasses an actively performed or initiated, and thus technically controlled or regulated, supply of the air flow by means of a blower unit or fan unit of the CO2 separation device. However, the term "supply" or "supplied" can also encompass a passively performed or initiated supply of the air flow without departing from the scope of the present invention. Consequently, the air flow can be supplied in any desired manner, for example, naturally (as wind).

[0052] The CO2 separation device preferably has at least one separation chamber for accommodating at least one CO2 separation module. The CO2 separation device further preferably has a plurality of separation chambers arranged one above the other and / or next to one another. The separation chambers can be operated in groups in parallel in the CO2 separation process and the CO2 release process. In other words, if one group of separation chambers is operating in the CO2 separation process, the other group of separation chambers can be operated in the CO2 release process, and vice versa.

[0053] The CO2 separation device can have a valve unit with a plurality of, in particular controllable, valves to close the separation chamber for the CO2 release process. The valve unit can have an inlet valve, which is arranged in an inlet channel for the supplied or sucked-in air flow and is designed to close the inlet channel and to isolate the separation chamber upstream. The valve unit can further have an outlet valve, which is arranged in an outlet channel for the CO2-reduced air flow and is designed to close the outlet channel and to isolate the separation chamber downstream. The valve unit can also have a CO2 valve, which is arranged in a CO2 discharge channel for discharging separated CO2 and is designed to open the CO2 discharge channel in order to specifically discharge the separated / bound and released CO2 from the separation chamber.

[0054] The CO2 separation device may further comprise at least one of the following units: - Blower unit, in particular with a plurality of fans for supplying the air flow; - Pump unit or vacuum pump for providing overpressure and / or negative pressure for the CO2 release process or desorption process; - Steam generator to provide steam for the CO2 release or desorption process; - electric heating unit for additional heating of the CO2 separation agent for the CO2 release or desorption process; - Sensor unit for the CO2 separation and CO2 release process; - Control unit for controlling and / or regulating the CO2 separation and CO2 release process.

[0055] The control unit can be designed to be connected to other control units and / or a central control unit of the CO2 separation device or a higher-level system by means of radio transmission such as Wi-Fi, Bluetooth, near-field communication, etc.

[0056] The CO2 separation device is preferably designed to be stationary. In particular, the CO2 separation device can be part of a building's air conditioning system, particularly integrated into an air conditioning system within a building. The separation chamber of the CO2 separation device can be integrated into the building's air conditioning circuit. Drawings

[0057] The invention is explained in more detail below with reference to the accompanying drawings. They show: Fig. 1 shows a basic structure of a CO2 separation device according to the prior art; Fig. 2 a perspective view of an embodiment of a CO2 separation module according to the invention; Fig. 3 a side sectional view of the CO2 separation module from Fig. 2; Fig. 4 a side sectional view of an embodiment of a CO2 separation module with heating rods; Fig. 5 a side sectional view of an embodiment of a CO2 separation module with heating mats; and Fig. 6a-c representations of a sequence of a filling process of a CO2 separation module according to the invention.

[0058] In the following description of the prior art and preferred embodiments of the present invention, the same or similar reference numerals are used for the elements shown in the various figures and having a similar effect, whereby a repeated description of the elements is omitted.

[0059] Fig. Figure 1 shows a basic structure of a CO2 separation device 100 according to the prior art. The CO2 separation device 100 is designed to separate CO2 (carbon dioxide) from an air stream 104 supplied by a blower unit 102 using a cyclically performed sorption-desorption process.

[0060] For this purpose, the CO2 separation device 100 has a separation chamber 106 for accommodating a CO2 separation module (not shown) with a granular CO2 separation agent or granular sorbent. The separation chamber 106 has an inlet valve 108 on an inlet channel 110 for the sucked-in air stream 104, which is designed to close the inlet channel 110 and isolate the separation chamber 106 upstream. The separation chamber 106 further has an outlet valve 112 on an outlet channel 114 for the CO2-reduced air stream 104', which is designed to close the outlet channel 114 and isolate the separation chamber 106 downstream. The separation chamber 106 also has a CO2 valve 116, which is arranged in a CO2 discharge channel 118 and is designed to open the CO2 discharge channel 118 in order to discharge separated, ie sorbed and released again, ie desorbed CO2 and, if applicable.vaporous water from the separation chamber 106.

[0061] The separated CO2 and vaporous water are pumped out of the separation chamber 106 by means of a pump unit 120 or vacuum pump 120, wherein a water vapor condenser 122 arranged outside the separation chamber 106 is connected upstream of the vacuum pump 120.

[0062] The CO2 separation device 100 also has a heating and cooling unit 124 for heating and cooling the sorbent and a water vapor generation unit 126 arranged outside the separation chamber 106 for providing water vapor for the CO2 release process or desorption process.

[0063] Fig. 2 and Fig. 3 show an embodiment of a CO2 separation module 10 according to the invention, which can be used, for example, in the CO2 separation device 100 of Fig. 1, in a perspective view and in a sectional view. In the perspective view of Fig. 2 a front part of the CO2 separation module 10 is cut out to allow a better view of the interior of the CO2 separation module 10. The sectional view from Fig. 3 illustrates the flow paths of the air stream 104, 104'.

[0064] The CO2 separation module 10 comprises a stacked arrangement or stack of a plurality of supply channels 12, discharge channels 14, and receiving chambers 16, which are arranged alternately and adjacent to one another in a stacking direction 17 of the CO2 separation module 10. A supply channel 12 and a discharge channel 14 are arranged alternately between the receiving chambers 16.

[0065] The receiving chambers 16 are flat or layered. The receiving chambers 16 are filled with a CO2 separation agent 18 or sorbent 18, which in the illustrated embodiment is embodied as a granular ion exchange resin 18. For illustrative purposes, only one receiving chamber 16 is shown filled.

[0066] Each receiving chamber 16 further comprises, in its circumferential direction 20, two air-permeable first chamber walls 22 arranged opposite one another and two second chamber walls 24 arranged opposite one another, which are jointly formed from a one-piece, curved, air-permeable plate 26. The one-piece, curved, air-permeable plate 26 is formed as an expanded metal sheet.

[0067] Each receiving chamber 16 also has two narrow openings 28 arranged opposite one another for introducing and / or discharging the sorbent 18, wherein the two openings 28 are delimited by the two air-permeable first chamber walls 22 and the two second chamber walls 24. The two openings 28 extend over essentially the entire longitudinal and vertical extent of the respective receiving chamber 16.

[0068] The supply channels 12 are arranged between two receiving chambers 16 and fluidically connected thereto in order to guide the air flow 104 through the respective granular ion exchange resin 18 of the receiving chambers 16.

[0069] Analogously, the discharge channels 14 are arranged between two receiving chambers 16 and fluidically connected thereto in order to discharge the CO2-reduced air flow 104' from the granular ion exchange resin 18 of the receiving chambers 16.

[0070] In this case, a wave-shaped spacer element 30 is arranged in each of the supply channels 12 and in the discharge channels 14, which is connected to two adjacent air-permeable first chamber walls 22 of the respective or adjacent receiving chambers 16.

[0071] The wave-shaped spacer elements 30 are formed from a curved, in particular air-permeable plate 30, which is designed as an expanded metal sheet or the same expanded metal sheet as the one-piece curved air-permeable plate 26 of the receiving chambers 16.

[0072] The spacer elements 30 extend over substantially the entire longitudinal and transverse extent of the first chamber walls 22.

[0073] The supply channels 12 and the discharge channels 14, together with the respective spacer elements 30, have a varying height in a flow direction of the air flow 104. Here, the supply channels 12 with the respective spacer elements 30 are tapered in the flow direction of the air flow 104 from an inflow side 32 to an outflow side 34 of the CO2 separation module 10, and the discharge channels 14 with the respective spacer elements 30 are widened in the flow direction of the CO2-reduced air flow 104' from the inflow side 32 to the outflow side 34 of the CO2 separation module 10.

[0074] The supply channels 12 with the spacer elements 30 and the discharge channels 14 with the spacer elements 30 are of identical design and are arranged in the stacked arrangement or in the stack only rotated by 180° (around the stacking direction 17) relative to each other.

[0075] Accordingly, the two air-permeable first chamber walls 22 arranged opposite one another are arranged on an upper side and a lower side of the receiving chambers 16, the two second chamber walls 24 arranged opposite one another are arranged on the inflow side 32 and the outflow side 34 of the CO2 separation module 10 and the two openings 28 are arranged on the transverse side 36 arranged transversely to the inflow side 32 and the outflow side 34.

[0076] In Fig. 4 and Fig. 5 are further embodiments of the CO2 separation module 10 with heating elements 38a, b, ie heating tubes 38a ( Fig. 4) and air-permeable heating mats 38b ( Fig. 5) are shown, which are arranged in the receiving chambers 16 and can be inserted and removed via the openings 28

[0077] In Fig. 6a-c is now a sequence of a filling process of the CO2 separation module 10 from Fig. 2 and Fig. 3 shown.

[0078] First, a suspension 40 comprising the granular ion exchange resin 18 to be filled and water is produced. As can be seen from Fig. As can be seen in Figure 6a, the CO2 separation module 10 has a closure element 42 on one of the transverse sides 36, which closure element is designed as a closed metal plate 42 to close the openings 28 of the receiving chambers 16 on this transverse side 36, through which the granular ion exchange resin 18 could escape during filling. Furthermore, the CO2 separation module 10 has another closed metal plate 46 on a top side 44 to achieve airtightness on the top side 44.

[0079] Then, as in Fig.6b, the CO2 separation module 10 is rotated such that the open openings 28 point upwards, so that the suspension 40 can be filled through the upwardly facing openings 28 into the receiving chambers 16 such that the water flows out through the air-permeable chamber walls 22 and the receiving chambers 16 are completely filled with the remaining granular ion exchange resin 18.

[0080] Finally, the filled CO2 separation module 10 is returned to its installation position or rotated, wherein the open openings 28 are previously closed by means of a further closure element 48, which is designed as a closed metal plate 48, so that the granular ion exchange resin 18 remains in the receiving chambers 16.

[0081] If an embodiment includes an “and / or” link between a first feature and a second feature, this should be read as meaning that the embodiment according to one embodiment includes both the first feature and the second feature and according to another embodiment includes either only the first feature or only the second feature. QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] WO 2020 / 212146 A1 [0003, 0050] US 2020 / 0391153 A1 [0004, 0050] WO 2014 / 170184 A1

[0005]

Claims

[1] CO2 separation module (10) for a CO2 separation device (100) for separating CO2 from a supplied air stream (104) with - a receiving chamber (16) for receiving a CO2 separation agent (18), wherein the receiving chamber (16) has two air-permeable first chamber walls (22) arranged opposite one another and two second chamber walls (24) arranged opposite one another in a circumferential direction (20); - a supply channel (12) which is arranged adjacent to one of the two air-permeable first chamber walls (22) and is fluidly connected via this to the receiving chamber (16) in order to guide the air flow (104) through the receiving chamber (16) and the CO2 separation means (18); and - a discharge channel (14) which is arranged adjacent to the other of the two air-permeable first chamber walls (22) and is fluidly connected via this to the receiving chamber (16) in order to discharge the CO2-reduced air flow (104') from the receiving chamber (16) and the CO2 separation means (18); characterized by that the two air-permeable first chamber walls (22) and at least one of the two second chamber walls (24), in particular the two second chamber walls (24), of the receiving chamber (16) are jointly formed from a one-piece curved air-permeable plate (26). [2] CO2 separation module (10) according to claim 1, characterized by that the one-piece curved air-permeable plate (26) is designed as a perforated metal plate, in particular perforated metal sheet or expanded metal sheet or woven wire mesh or metal knitted fabric. [3] CO2 separation module (10) according to claim 1 or 2, characterized bythat the receiving chamber (16) has at least one opening (28), in particular two openings (28) arranged opposite one another, for introducing and / or discharging the CO2 separation agent (18), wherein the at least one opening (28) is delimited by the two air-permeable first chamber walls (22) and at least one of the two second chamber walls (24), in particular the two second chamber walls (24). [4] CO2 separation module (10) according to claim 3, characterized by that the at least one opening (28) extends over a substantially entire longitudinal extent and height extent of the receiving chamber (16). [5] CO2 separation module (10) according to claim 3 or 4, characterized bythat the two air-permeable first chamber walls (22) arranged opposite one another are arranged on an upper side and a lower side of the receiving chamber (16), the two second chamber walls (24) arranged opposite one another are arranged on an inflow side (32) and an outflow side (34) of the CO2 separation module (10) and the at least one opening (28) is arranged on a transverse side (36) arranged transversely to the inflow side (32) and the outflow side (34). [6] CO2 separation module (10) according to one of claims 3 to 5, characterized by at least one heating element (38), in particular a heating tube (38a) or an air-permeable heating mat (38b), which is arranged in the receiving chamber (16) and can be introduced and / or removed via the at least one opening (28). [7] CO2 separation module (10) according to one of the preceding claims, characterized bythat the CO2 separation means (18) is arranged in the receiving chamber (16), in particular wherein the CO2 separation means (18) is further formed in particle-shaped, fibrous or mat-shaped form. [8] CO2 separation module (10) according to one of the preceding claims, characterized by an arrangement stacked in a stacking direction (17) of the CO2 separation module (10) with a plurality of receiving chambers (16), supply channels (12) and discharge channels (14), wherein a supply channel (12) and a discharge channel (14) are arranged alternately between the receiving chambers (16) in the stacking direction (17). [9] CO2 separation module (10) according to claim 8, characterized bythat in each of the supply channels (12) and / or in the discharge channels (14) a spacer element (30) is arranged, which is connected to the two adjacent first chamber walls (22) of the respective receiving chambers (16), wherein the spacer element (30) is formed from a curved, in particular air-permeable plate (30). [10] CO2 separation module (10) according to claim 9, characterized by that the spacer elements (30) have a wave shape. [11] CO2 separation module (10) according to claim 9 or 10, characterized by that the spacer elements (30) are designed as a perforated metal plate, in particular perforated metal sheet or expanded metal sheet or woven wire mesh or metal knitted fabric. [12] CO2 separation module (10) according to one of claims 9 to 11, characterized by that the spacer elements (30) extend over a substantially entire longitudinal and transverse extent of the first chamber walls (22). [13] CO2 separation module (10) according to one of claims 9 to 12, characterized by that the supply channels (12) and / or the discharge channels (14) together with the respective spacer elements (30) have a varying height in a flow direction of the air flow (104), in particular the supply channels (12) with the respective spacer elements (30) are tapered in the flow direction of the air flow (104) and / or the discharge channels (14) with the respective spacer elements (30) are widened in the flow direction of the CO2-reduced air flow (104'). [14] CO2 separation device (100) with a CO2 separation module (10) according to one of the preceding claims. [15] Method (200) for producing a CO2 separation module (10) according to one of claims 9 to 13, characterized by that the spacer elements (30) are produced by means of a pressure forming process.

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