CO2 separation device for separating CO2 from a supplied gas stream

Abstract

A CO2 separation device (10) for separating CO2 from a supplied gas stream (14), in particular an air stream (14) from an environment, is proposed, comprising at least one separation chamber (16) and a holding device (18) for holding plate-shaped CO2 separation modules (19), wherein the holding device (18) has at least one helix (40, 42) between whose turns (44) the plate-shaped CO2 separation modules (19) can be arranged, in particular inserted, and / or arranged, in particular inserted.

Description

State of the art

[0001] The invention relates to a CO2 separation device for separating CO2 from a supplied gas stream, in particular an air stream from an environment, comprising at least one separation chamber, a holding device for holding plate-shaped CO2 separation modules, and a method for mounting plate-shaped CO2 separation modules in such a CO2 separation device.

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

[0003] Since the binding of CO2 and, if present, water to an adsorbent material depends on temperature, pressure, concentration, humidity, etc., all adsorption and desorption systems cyclically establish different conditions in order to separate CO2 through the resulting hysteresis. To adjust the desorption conditions, the adsorbent material must be temporarily sealed off from the environment and is therefore located in a chamber.

[0004] The chamber typically goes through the following steps cyclically: (1) Adsorption of ambient air with the chamber open; (2) Sealing the chamber and heating the adsorber material and the metallic chamber structure; (3) Desorption of the CO2 and the bound water by supplying heat (e.g. in a range of greater than or equal to 90°C to less than or equal to 120°C, on average therefore approx. 105°C) under exclusion of oxygen to avoid degradation of the adsorber material, and at reduced pressure (e.g. in a range of greater than or equal to 50 mbar to less than or equal to 400 mbar) and pumping out the CO2 and the water vapor by means of a vacuum pump; (4) active cooling of the adsorber material and the chamber and optionally drying of the adsorber material to below a critical temperature (e.g. in a range of greater than or equal to 50°C to less than or equal to 60°C) below which contact with ambient air no longer leads to increased degradation of the adsorber material by atmospheric oxygen; (5) Opening the chamber to the environment, cooling to ambient temperature and thus resuming adsorption of CO2 and water from the ambient air.

[0005] Air filter panels, which in the case of CO2 adsorption also bind water from the atmosphere through co-adsorption and release it during desorption, are exposed to high humidity levels and the associated changes in material length. Free-standing structures are therefore not durable or are pressed against each other by airflow and can stick together.

[0006] If the heating structures are laid flat on the adsorber structures, an air supply parallel to the adsorption surfaces during adsorption in this stacked system is not possible, as the heating structures block access.

[0007] 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.

[0008] WO 2014 / 170184 A1 discloses a gas separation device with stacked layers, which have a rigid frame on which flexible cloths are stretched on both sides. Disclosure of the invention

[0009] The present invention relates to a CO2 separation device for separating CO2 from a supplied gas stream, in particular an air stream from an environment, comprising at least one separation chamber and a holding device for holding plate-shaped CO2 separation modules, wherein the holding device has at least one helix, between the turns of which the plate-shaped CO2 separation modules can be arranged, in particular inserted, and / or arranged, in particular inserted.

[0010] The present invention further relates to a method for mounting plate-shaped CO2 separation modules in a CO2 separation device according to claim one of the preceding claims, wherein the plate-shaped CO2 separation modules are arranged between the windings of the holding device, in particular inserted and / or clamped.

[0011] For a CO2 separation or sorption process, thin layers of a sorbent are advantageous to minimize pressure losses. However, this requires suitable support structures in which the CO2 sorption modules can be mounted.

[0012] According to the invention, a holding device is proposed which has at least one helix between whose turns the plate-shaped CO2 separation modules can be arranged, in particular inserted. The helix provides a holding device that can be manufactured quickly, easily, and cost-effectively, for example, using standard manufacturing processes and materials, and which allows for very easy assembly and disassembly of the plate-shaped CO2 separation modules. Furthermore, the helix can be easily designed as desired and adapted to specific requirements, allowing, for example, the spacing of the plate-shaped CO2 separation modules and the gas flow through the helix to be adjusted by means of the material or wire diameter.

[0013] The turns of the helix can be circular or rectangular. Consequently, the helix can be helical or screw-shaped.

[0014] Preferably, the CO2 separation device comprises a plurality of plate-shaped CO2 separation modules, which are arranged, in particular inserted, between the turns of the holding device. Due to the design of the helix, the plate-shaped CO2 separation modules are arranged essentially parallel to each other.

[0015] It is advantageous if the helix is ​​designed as a tubular coil to conduct a temperature control medium from a temperature control unit of the CO2 separation device and thereby temperature-control, i.e., to heat and / or cool, the plate-shaped CO2 separation modules. In other words, the helix material is tubular and the helix is ​​designed as a temperature control coil. Alternatively or additionally, the helix can be electrically heated, in particular as an electric heating coil, to heat the plate-shaped CO2 separation modules. In this way, the holding device or helix fulfills a temperature control function in addition to its holding and spacing functions, allowing the plate-shaped CO2 separation modules to be temperature-controlled very simply and efficiently.Since the temperature control lines remain in the CO2 separation device, the plate-shaped CO2 separation modules do not require their own temperature control lines, thus eliminating the need for complex connection of the individual plate-shaped CO2 separation modules (fast change intervals are possible).

[0016] Furthermore, it is advantageous if the coil is designed as a tension or compression spring, between whose coils the plate-shaped CO2 separation modules can be clamped and / or held in place by means of the spring force. This design further simplifies assembly and / or disassembly and ensures optimal heat transfer to and / or from the temperature control coil.

[0017] Furthermore, it is advantageous if the holding device has at least two helixes with different transverse dimensions and, in particular, the same pitch, wherein one helix is ​​arranged inside the other helix, or the at least two helixes are arranged in series in a longitudinal direction. In other words, for example, two helixes with the same pitch can be nested inside one another, within which the plate-shaped CO2 separation modules are arranged. This allows the plate-shaped CO2 separation modules to be further stabilized and provides additional adjustment options regarding the spacing and gas flow through the helix.

[0018] Furthermore, it is advantageous if inlet and outlet channels are provided between certain coils, wherein the gas flow can enter the helix along a transverse direction through the inlet channels, then flow between and / or through the plate-shaped CO2 separation modules, and finally exit the helix again through the outlet channels. It is particularly advantageous if the inlet and outlet channels are realized by deformation of the respective coils and / or by appropriately designed spacer elements arranged, in particular clamped, between the coils. The inlet and outlet channels can be provided between the corresponding coils instead of the plate-shaped CO2 separation modules. In particular, the plate-shaped CO2 separation modules and the inlet and outlet channels can be arranged or provided at regular intervals, especially alternating between the coils.This allows the lateral flow through the helix to be provided or improved.

[0019] Alternatively, it is advantageous if at least one inlet channel and at least one outlet channel are provided along a longitudinal direction of the helix, wherein the gas flow can enter the helix through the at least one inlet channel, then flow along a transverse direction of the helix between and / or through the plate-shaped CO2 separation modules, and finally flow out of the helix again through the at least one outlet channel. It is particularly advantageous if the coils are dimensioned such that they have at least an overhang towards the plate-shaped CO2 separation modules along the transverse direction, thereby forming the at least one inlet channel and / or the at least one outlet channel along the longitudinal direction, particularly on opposite sides of the helix.

[0020] Alternatively or additionally, it is also advantageous if the plate-shaped CO2 separation modules have openings along a longitudinal direction of the helix, thereby forming at least one inflow channel and at least one outflow channel, wherein the gas flow can enter the helix through the at least one inflow channel, then flow along a transverse direction of the helix between the plate-shaped CO2 separation modules over and / or through them, and flow out of the helix again through the at least one outflow channel.

[0021] The at least one inlet channel and / or the at least one outlet channel extend along the longitudinal axis. The gas flow from inlet to outlet can be adjusted by dimensioning the overhang or openings. Furthermore, appropriately designed end elements can be provided at the longitudinal ends of the helix, featuring a flow inlet and a flow outlet and covering the remaining areas. The gas can also be passed over the plate-shaped CO2 separation modules multiple times, if necessary, by connecting the inner helix in series with the outer helix.

[0022] This measure allows for a gas flow pattern that ensures the plate-shaped CO2 separation modules, if they are enclosed by a frame, are evenly and parallel flowed over in a manner analogous to the fuel cell stack, without the need for spacers.

[0023] The plate-shaped CO2 separation modules are designed to separate CO2 from a supplied gas stream, particularly an ambient air stream. These modules can be designed to allow gas flow over and / or through them to separate the CO2. Depending on the design, the modules can be dimensioned to cover the entire inner cross-section of the coil or to partially cover it, thereby potentially forming at least one inlet channel and at least one outlet channel.

[0024] The plate-shaped CO2 separation modules can, for example, have a stacked arrangement with one, two, or a multitude of air-permeable plate layers and one or a multitude of air-permeable sorption layers, which are arranged alternately and adjacently, i.e., in contact with each other, along a stacking direction. Understandably, the air-permeable plate layers are impermeable to the sorption layers or to a sorbent within the sorption layers, particularly if this sorbent is granular, particulate, or fibrous.

[0025] The air-permeable plate layers can be selected from the following group: perforated sheet, in particular perforated sheet, mesh mat, expanded metal, woven mesh, wire mesh, knitted fabric, foam, or combinations thereof. Advantageously, these are standard materials that are cost-effective, readily available, and easy to process. The air-permeable plate layers can be made of or consist of a metal and / or polymer. Consequently, the air-permeable plate layers can, for example, comprise a perforated metal sheet, perforated sheet, expanded metal sheet, wire mesh, or wire fabric. Alternatively or additionally, they can, for example, comprise a perforated polymer sheet, a polymer expanded metal mesh, or a polymer mesh mat. The latter require a low heat capacity and thus reduced heating energy consumption during a desorption process. Manufacturing can be carried out from a sheet, a film, or by injection molding.

[0026] The air-permeable sorption layers can each have only one air-permeable sorption layer or two or more air-permeable sorption layers arranged adjacent to each other and, in particular, having different forms. The air-permeable sorption layers, in particular the air-permeable sorption layers, can contain at least one sorbent, which may be granular, particulate, fibrous, nonwoven, or mat-shaped.

[0027] The sorbent is designed to separate CO2 from a supplied gas or air stream. The sorbent is solid in form. It can be, for example, particulate, fibrous, or mat-like. In particular, the sorbent can comprise a solid (appropriately functionalized) sorbent, such as an adsorbent and / or an absorbent. Accordingly, the sorbent can, for example, have a particulate, fibrous, or nonwoven solid as a support 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.

[0028] The sorbent can comprise or be in the form of a granular ion exchange resin. For example, the sorbent can comprise or consist of granular Lewatit VP OC 1065 or Zeolite X13.

[0029] The air-permeable plate layers can each have a frame, particularly a circumferential one. It is especially advantageous if the air-permeable plate layers are injected into the frame. In this case, the frame is particularly designed as a polymer frame.

[0030] The CO2 separation module is designed and configured for use in a CO2 separation device to separate CO2 from a supplied gas stream, in particular an air stream from an environment (the CO2 separation device). Within the scope of the present invention, the term "supply" or "supplied" primarily refers to an actively carried out or initiated, and thus technically controlled or regulated, supply of the gas or air stream by means of a blower unit or fan unit of the CO2 separation device. However, the term "supply" or "supplied" can also include a passively carried out or initiated supply of the gas or air stream without departing from the scope of the present invention. Consequently, the air stream can be supplied in any manner, e.g., naturally (as wind).

[0031] The CO2 separation device has at least one separation chamber in which at least one CO2 separation module according to the invention is arranged.

[0032] The CO2 separation device preferably comprises a plurality of separation chambers, which can be arranged adjacent to one another and / or side by side, or, if set up separately, fluidically connected to each other. The separation chambers are operated individually or in groups in parallel in a CO2 release mode and a CO2 separation mode, or can be operated individually or in groups in parallel in a CO2 release mode and a CO2 separation mode. The CO2 release mode and the CO2 separation mode are repeated cyclically. The basic operating principle of the CO2 separation device can be analogous, for example, to the aforementioned WO 2020 / 212146 A1. In other words, if one of the separation chambers or group of separation chambers is operated in CO2 separation mode, the other of the two separation chambers or group of separation chambers is operated in CO2 release mode.is operable and vice versa. However, there can also be intermediate phases in which the separation chambers are operated or operable in the same mode.

[0033] The CO2 release process is carried out under reduced pressure and at a temperature elevated above ambient temperature. Accordingly, the CO2 release process is preferably carried out using a pump unit or vacuum unit to release CO2 bound in the sorbent, which was previously bound as a result of a CO2 separation process, in particular a sorption process. The CO2 is, understandably, temporarily bound. Within the scope of the present invention, the term "release" encompasses any meaningful method of releasing or expelling CO2 (carbon dioxide) from the sorbent, wherein a dissolution and / or release and / or discharge of CO2 molecules from the sorbent occurs. In this process, the CO2 is released or dissolved from the sorbent, particularly by introducing energy or heat into the sorbent.

[0034] The CO2 release mode is preferably a desorption mode. Accordingly, the release of CO2 can be achieved in particular by means of at least one of the following processes or combinations thereof: - chemical desorption process - physical desorption process

[0035] The CO2 separation process is carried out at a higher pressure, particularly ambient pressure, and a lower temperature, particularly ambient temperature, compared to the CO2 release process. Within the scope of the present invention, the term "separation" encompasses any meaningful method of separating or deposition of CO2 (carbon dioxide) from the gas or air stream, involving the binding, adhesion, storage, and / or absorption of CO2 molecules by a sorbent.

[0036] The CO2 separation mode is preferably a sorption mode, which in particular comprises an adsorption process and / or an absorption process. Accordingly, the separation of the CO2 can be carried out in particular by means of at least one of the following processes or combinations thereof: - chemical adsorption process - physical adsorption process - chemical absorption process - physical absorption process

[0037] The CO2 separation device can include a valve unit with a plurality of valves, particularly controllable ones, for closing the separation chamber during the CO2 release phase. The valve unit can include an inlet valve located in an inlet channel for the supplied or drawn-in gas or air flow, configured to close the inlet channel and isolate the separation chamber upstream. The valve unit can also include an outlet valve located in an outlet channel for the CO2-reduced gas or air flow, configured to close the outlet channel and isolate the separation chamber downstream. Furthermore, the valve unit can include a CO2 discharge valve located in a CO2 discharge channel for removing separated CO2, configured to open the CO2 discharge channel in order to selectively discharge the separated / bound and re-released CO2 from the separation chamber.

[0038] The CO2 separation device may further comprise at least one of the following units: - Blower unit, in particular with a large number of fans for supplying the gas or air flow; - Water vapor generator for providing water vapor for the CO2 release mode or desorption mode; - Inerting unit for supplying an inert gas stream, such as nitrogen, oxygen-free air and / or water vapor, to remove oxygen before the CO2 release mode or desorption mode to protect the CO2 combustion medium from chemical degradation; - Heating unit for additional heating of the sorbent for the CO2 release mode or desorption mode; - Cooling unit for additional cooling of the sorbent for the CO2 separation mode or sorption mode; - Material conveying unit for conveying the sorbent through the separation chamber; - Sensor unit for CO2 separation and CO2 release modes; - Control unit for controlling and / or regulating the CO2 separation and CO2 release mode.

[0039] The control unit can be configured to be connected to other control units and / or a central control unit of the CO2 separation device or a higher-level system via wireless transmission such as WLAN, Bluetooth, Near-Field Communication, etc. It should be noted that, within the scope of this application, the term "control" also includes regulating the respective device and / or unit.

[0040] The CO2 separation device is preferably designed as a stationary unit. In particular, the CO2 separation device can be part of a building climate control system, especially integrated into a climate control system within a building. The separation chambers of the CO2 separation device can be integrated into the building's air conditioning circuit. Drawings

[0041] The invention is explained in more detail below with reference to the accompanying drawings. These show: Fig. 1 a basic structure of a CO2 separation device according to the invention; Fig. 2 a side detail view of a holding device of a first embodiment of a CO2 separation device according to the invention; Fig. 3 the holding device Fig. 2 with spacers; Fig. 4 an upper detailed view of a holding device of a further embodiment of a CO2 separation device according to the invention; and Fig. 5 the holding device Fig. 4 with openings in the CO2 separation modules.

[0042] In the following description of preferred embodiments of the present invention, the same or similar reference numerals are used for the elements shown in the various figures and acting similarly, without repeating the description of the elements.

[0043] Fig. Figure 1 shows a basic structure of a CO2 separation device, which is designated as a whole by reference numeral 10. The CO2 separation device 10 is designed to separate CO2 (carbon dioxide) from an air stream 14 supplied by means of a blower unit 12 by means of cyclically executable CO2 separation modes or CO2 sorption modes and CO2 release modes or CO2 desorption modes.

[0044] For this purpose, the CO2 separation device 10 has a separation chamber 16 with a holding device 18 in which – as will be explained in more detail in the description of the following figures – a plurality of CO2 separation modules 19 are arranged. The separation chamber 16 has an inlet valve 20 on an inlet channel 22 for the aspirated airflow 14, which is configured to close the inlet channel 22 and isolate the separation chamber 16 upstream. The separation chamber 16 also has an outlet valve 24 on an outlet channel 26 for the CO2-reduced airflow 14', which is configured to close the outlet channel 26 and isolate the separation chamber 16 downstream. The separation chamber 16 also has a CO2 valve 28, which is arranged in a CO2 discharge channel 30 and is designed to open the CO2 discharge channel 30 to release separated, i.e. sorbed and released, i.e. desorbed CO2 and, if applicable,to discharge water vapor from separation chamber 16.

[0045] The CO2 separation device 10 also includes a temperature control unit 32, which is fluidically connected to the holding device 18 to temperature control the CO2 separation modules 19, and a steam generation unit 34 to provide steam for the CO2 release mode or desorption mode.

[0046] The separated CO2 and water vapor are pumped out of the separation chamber 16 by means of a pump unit 36 ​​or vacuum pump 36, with a water vapor condenser 38 being connected upstream of the pump unit 36 ​​or vacuum pump 36.

[0047] The CO2 separation device 10 also has a control unit 40 for controlling the CO2 separation device 10 or the CO2 separation modes and CO2 release modes.

[0048] Fig. Figure 2 shows a side view detail of a holding device 18 of a first embodiment of a CO2 separation device 10 according to the invention. The holding device 18 has two helixes 40, 42 arranged one inside the other. The two helixes 40, 42 have circular turns 44 with the same pitch but different diameters. The plate-shaped CO2 separation modules 19 are arranged between the turns 44. The two helixes 40, 42 are designed as tension springs, which is why the plate-shaped CO2 separation modules 19 are clamped between the turns 44 by means of the spring force. The CO2 separation modules 19 were inserted between the turns 44 along an insertion direction 46.

[0049] The two helixes 40, 42 are further designed as tube helixes to guide a temperature control medium 48 of the temperature control unit 32 of the CO2 separation device 10 and thereby efficiently temperature control the plate-shaped CO2 separation modules 19.

[0050] Fig. 3 shows the holding device Fig. 2, wherein the plate-shaped CO2 separation modules 19 and spacer elements 50 are alternately arranged or clamped between the coils 44. The spacer elements 50 serve to provide inlet and outlet channels 52, 54 between the respective coils 44. This allows the airflow 14 to flow very efficiently along a transverse direction 56 through the inlet channels 52 into the coils 40, 42, then flow between and / or through the plate-shaped CO2 separation modules 19, and exit the coils 40, 42 again through the outlet channels 54 as a CO-reduced airflow 14'.

[0051] In Fig. Figure 4 shows a detailed top view of a holding device 18 of a further embodiment of a CO2 separation device 10 according to the invention. In contrast to the embodiments of Fig. 2 and Fig. 3. The turns 44 of the pipe coils 40, 42 are rectangular in shape. Furthermore, the holding device 18 has inlet channels 52 and outlet channels 54 extending along a longitudinal direction of the coils 40, 42. The turns 44 are dimensioned such that they have a projection towards the plate-shaped CO2 separation modules 19 on opposite sides of the coils 40, 42 along the transverse direction 56, thereby forming the inlet channels 52 and the outlet channels 54 along the longitudinal direction. This allows the airflow 14 to flow along the longitudinal direction through the inlet channels 52 into the helixes 40, 42, then along the transverse direction 56 of the helix, 40, 42 between the plate-shaped CO2 separation modules 19 over and / or through them and to flow out again as a CO-reduced airflow 14' from the helixes 40, 42 through the outlet channels 54.

[0052] Fig. Figure 5 shows the holding device 18. Fig.4, wherein instead of overhangs, the plate-shaped CO2 separation modules 19 cover the entire inner cross-section of the coils 40, 42 and have openings 58 along the longitudinal direction, which form the inlet channels 52 and the outlet channels 54. This allows the airflow 14 to flow into the coils 40, 42 along the longitudinal direction through the inlet channels 52, then flow along the transverse direction 56 of the coils 40, 42 between and / or through the plate-shaped CO2 separation modules 19, and flow out of the coils 40, 42 again through the outlet channels 54 as a CO-reduced airflow 14'. QUOTES INCLUDED IN THE DESCRIPTION

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

[0000] US 2020 / 0391153 A1

[0007] WO 2014 / 170184 A1

[0008] WO 2020 / 212146 A1

[0032]

Claims

[1] CO2 separation device (10) for separating CO2 from a supplied gas stream (14), in particular an air stream (14) from an environment, comprising at least one separation chamber (16) and a holding device (18) for holding plate-shaped CO2 separation modules (19), characterized by , that the holding device (18) has at least one helix (40, 42) between whose turns (44) the plate-shaped CO2 separation modules (19) can be arranged, in particular inserted, and / or arranged, in particular inserted. [2] CO2 separation device (10) according to claim 1, characterized by , that the helix (40, 42) is designed as a tube helix to guide a temperature control medium (48) of a temperature control unit (32) of the CO2 separation device (10) and thereby temperature control the plate-shaped CO2 separation modules (19). [3] CO2 separation device (10) according to claim 1 or 2, characterized by, that the helix (40, 42) is electrically heatable, in particular designed as an electric heating coil, to heat the plate-shaped CO2 separation modules (19). [4] CO2 separation device (10) according to one of the preceding claims, characterized by , that the coils (44) are circular or rectangular in shape. [5] CO2 separation device (10) according to one of the preceding claims, characterized by , that the helix (40, 42) is designed as a tension spring or compression spring, between whose turns (44) the plate-shaped CO2 separation modules (19) can be clamped and / or clamped by means of the spring force. [6] CO2 separation device (10) according to one of the preceding claims, characterized by, that the holding device (18) has at least two helixes (40, 42) with different transverse dimensions and in particular the same pitch, wherein one helix (40, 42) is arranged in the other helix (40, 42) or the at least two helixes (40, 42) are arranged in a row in a longitudinal direction. [7] CO2 separation device (10) according to one of the preceding claims, characterized by , that inflow and outflow channels (52, 54) are provided between certain turns (44), wherein the gas flow (14) can flow into the helix (40, 42) along a transverse direction (56) through the inflow channels (52), then between the plate-shaped CO2 separation modules (19) over and / or through them and can flow out of the helix (40, 42) again through the outflow channels (54). [8] CO2 separation device (10) according to claim 7, characterized by, that the inflow and outflow channels (50, 52) are realized by means of deformation of the respective windings (44) and / or correspondingly designed and arranged between the windings (44), in particular clamped, spacer elements (50). [9] CO2 separation device (10) according to any one of claims 1 to 6, characterized by , that along a longitudinal direction of the helix (40, 42) at least one inflow channel (52) and at least one outflow channel (54) are provided, wherein the gas flow (14) can flow into the helix (40, 42) through the at least one inflow channel (52), then can flow along a transverse direction (56) of the helix (40, 42) between the plate-shaped CO2 separation modules (19) over and / or through them and can flow out of the helix (40, 42) again through the at least one outflow channel (54). [10] CO2 separation device (10) according to claim 9, characterized by, that the turns (44) are dimensioned such that they have at least an overhang to the plate-shaped CO2 separation modules (19) along the transverse direction (56) and thereby form at least one inflow channel (52) and / or at least one outflow channel (54) along the longitudinal direction, in particular on opposite sides of the helix (40, 42). [11] CO2 separation device (10) according to one of the preceding claims, characterized by, that the plate-shaped CO2 separation modules (19) have openings (58) along a longitudinal direction of the helix (40, 42) and thereby form at least one inflow channel (52) and at least one outflow channel (54), wherein the gas flow (14) can flow into the helix (40, 42) through the at least one inflow channel (52), then flow between and / or through the plate-shaped CO2 separation modules (19) along a transverse direction (56) of the helix (40, 42) and can flow out of the helix (40, 42) again through the at least one outflow channel (54). [12] Method for mounting plate-shaped CO2 separation modules (19) in a CO2 separation device (10) according to any of the preceding claims, characterized by , that the plate-shaped CO2 separation modules (19) are arranged between the turns (44) of the holding device (18), in particular inserted and / or clamped. [13] Method for separating CO2 from a supplied gas stream (14), in particular an air stream (14) from an environment by means of a CO2 separation device (10) according to one of claims 1 to 11.

Images