Filter medium for use in a sorption filter

Abstract

The invention relates to a filter medium (10) for use in a sorption filter (100), comprising at least one sorption layer (14, 14a-14d) which comprises sorption material for adsorbing and / or desorbing at least one climate gas, and an electrical resistance heater (18) having one or more electrically conductive heating conductors (20) for heating the sorption material of the at least one sorption layer (14, 14a-14d).

Description

[0001] Münster, February 5, 2026

[0002] Our reference number: HE1216-02WO

[0003] Official file number: New registration

[0004] Applicant: Stallion SE

[0005] Nienkamp 55-85

[0006] 48147 Münster

[0007] Filter medium for use in a sorption filter

[0008] The invention relates to a filter medium for use in a sorption filter, with at least one sorption layer, which comprises sorption material for adsorbing and / or desorbing at least one greenhouse gas.

[0009] Furthermore, the invention relates to a sorption filter for use in a sorption plant, comprising a filter body with a filter medium.

[0010] Furthermore, the invention relates to a sorption system with a sorption filter and an electrical power supply unit.

[0011] Furthermore, the invention relates to a method for operating a sorption plant.

[0012] Furthermore, the invention relates to a method for producing a sorption filter, comprising the step of providing at least one sorption layer which includes sorption material for adsorbing and / or desorbing at least one greenhouse gas.

[0013] Sorption systems typically employ sorption filters whose filter medium comprises sorption material for adsorbing and / or desorbing a greenhouse gas, such as carbon dioxide. In temperature swing adsorption (TSA), a temperature change occurs between the adsorption and desorption phases to maximize the efficiency of the sorption processes. Additionally, the desorption process can be carried out under reduced pressure, particularly in a vacuum, to perform temperature vacuum swing adsorption (TVSA).

[0014] The sorption material in sorption filters of this type often acts as a thermal insulator, frequently preventing rapid and energy-efficient heating. Prior art approaches for heating the sorption material, such as heating via warm air, microwaves, or induction, result in excessively long heating times, high energy consumption, and / or complex systems to purchase and control.

[0015] The object underlying the invention is therefore to heat the sorption material quickly and at the same time in an energy-efficient manner.

[0016] The problem is solved by a filter medium of the type mentioned above, wherein the filter medium according to the invention comprises an electric resistance heater with one or more electrically conductive heating conductors for heating the sorption material of the at least one sorption layer.

[0017] The electric resistance heating allows for an effective conversion of electrical energy into heat energy, so that the sorption material is heated quickly and at the same time in an energy-efficient manner.

[0018] The filter medium can comprise one or more sorption layers. The greenhouse gas can be, for example, carbon dioxide.

[0019] The one or more heating conductors can be designed as an electrically conductive stranded wire. The one or more heating conductors can comprise one or more filaments, for example, copper filaments. As an alternative to copper, materials such as steel-copper, nickel-chromium, tungsten, iron-chromium-aluminum, aluminum, silver, or copper-nickel can be used. The one or more heating conductors can also be made of another electrically conductive material. The one or more heating conductors can have a round cross-section or be designed as a flat conductor, in particular as a flat heating tape. The one or more heating conductors or their filaments can have dielectric insulation, for example, lacquer insulation. The insulation preferably protects against corrosion damage caused by the presence of heat and moisture during the desorption phase.

[0020] The heating element can also have a planar, electrically conductive structure. This planar, electrically conductive structure can be, for example, an electrically conductive network or mesh. The planar, electrically conductive structure can be made of an electrically conductive metal or metal alloy, or of a non-metallic, electrically conductive material. For example, the heating element could be a planar metal mesh. Alternatively, the planar, electrically conductive structure could be a conductive foil, such as a stamped and / or metallic or non-metallic foil. The foil could, for example, be made of carbon.

[0021] The electric resistance heater is preferably configured to heat the sorption material to temperatures in the range between 70 °C and 130 °C. The electric resistance heater is preferably configured to operate with a voltage above 24 V, particularly above 200 V. For example, the electric resistance heater is configured to operate with a voltage of 230 V or 400 V.

[0022] One or more heating conductors can be applied directly to a carrier material of the sorption layer. For example, one or more heating conductors can be laid on the carrier material of the sorption layer and / or fixed to it, particularly by means of adhesive. Alternatively or additionally, one or more heating conductors can be formed as electrically conductive yarn and / or applied to the carrier material of the sorption layer by means of a sewing process, a needling process, and / or an embroidery process. One or more heating conductors applied to the carrier material of the sorption layer preferably run in one heating conductor plane or in several parallel heating conductor planes. One or more heating conductors applied to the carrier material of the sorption layer preferably run at least partially perpendicular or orthogonal to the one or more heating conductor planes.

[0023] The heating power of the resistance heater is preferably matched to the properties of at least one sorption layer. For a rapid heating rate combined with good air permeability for amine-functionalized ion exchange materials, the electric resistance heater can, for example, be designed to deliver a heat flux of 0.15 W / cm². 2 can be realized.

[0024] In a preferred embodiment of the filter medium according to the invention, the electrical resistance heating element comprises at least one heating layer, wherein the at least one sorption layer and the at least one heating layer preferably form a multi-layered structure, for example, a heating layer with a sorption layer or wherein a heating layer is located between two sorption layers. The filter medium can comprise one or more heating layers. With multiple heating layers, the heating layers can be energized independently of one another. Alternatively, the multiple heating layers can be energized together. If the heating layers can be energized independently of one another, layer-specific, and in particular demand-based, heat input can be achieved by layer-specific energization. The multiple heating layers can be identical in their structure or differ from one another. The one or more heating layers can each comprise one or more heating conductors.The one or more heating conductors of a heating layer can be energized together or independently. If a heating layer has multiple heating conductors, the heating conductors can each run within a heating field, and the multiple heating fields of a heating layer can be arranged side by side. For example, the heating layers can have several heating fields arranged side by side, each heating field comprising a heating conductor that runs within the heating field. If the heating conductors of a heating layer, each assigned to a heating field, can be energized independently, a heating field-specific, and in particular demand-based, heat input can be achieved by energizing the heating conductors in a heating field-specific manner. In a preferred embodiment of the filter medium according to the invention, the heating layer or the multi-layered structure is folded multiple times. The heating layer or the multi-layered structure is therefore preferably pleated.The one or more heating conductors are preferably folded multiple times. These folded heating conductors stabilize the filter medium. This stabilization allows for larger folds and thus a larger filter area. The folded structure can have uniform or varying fold heights, for example, alternating fold heights. In addition to the at least one sorption layer and the at least one heating layer, the layer structure can also include one or more additional layers. These additional layers can, for example, include a coalescer layer for liquid removal or a spacer layer.

[0025] In a further preferred embodiment of the filter medium according to the invention, the resistance heater or the one or more heating conductors of the resistance heater can be detached from the at least one sorption layer without damage. Preferably, the at least one heating layer of the resistance heater can be detached from the at least one sorption layer without damage. The at least one heating layer and the at least one sorption layer can, for example, lie loosely on top of or above one another. The non-destructive detachability allows the resistance heater to be reused. Furthermore, the non-destructive detachability allows for material separation for environmentally sound disposal.Alternatively, the resistance heater or one or more heating conductors of the resistance heater can be connected to the at least one sorption layer in such a way that detaching the resistance heater or one or more heating conductors of the resistance heater from the at least one sorption layer is only possible by causing damage. For example, the resistance heater or one or more heating conductors of the resistance heater are glued, welded, or sewn to the at least one sorption layer.

[0026] In a further preferred embodiment of the filter medium according to the invention, several electrically energizable heating conductor sections or several electrically energizable heating conductor sections run parallel to each other. If the filter medium has a pleated layer structure, the heating conductor sections or heating conductors running parallel to each other preferably extend in a direction that is perpendicular to or parallel to the direction of the pleat edges.

[0027] The filter medium according to the invention is further advantageously developed in that one or more heating conductors are supported by at least one planar support structure. The planar support structure is preferably a support layer. The planar support structure is preferably a component of the resistance heater, in particular of the heating layer of the resistance heater. The planar support structure is preferably permeable to a gas or gas mixture.

[0028] In a further preferred embodiment of the filter medium according to the invention, the planar support structure is designed as a mesh layer. The planar support structure is preferably a mesh structure. The mesh layer can have a grid or honeycomb structure and / or be perforated.

[0029] In a further preferred embodiment of the filter medium according to the invention, the one or more heating conductors are fixed to the planar support structure. The one or more heating conductors are preferably fixed to the planar support structure by means of at least one fixing thread. The fixing thread can be electrically conductive or electrically non-conductive. For example, the one or more heating conductors are sewn to the planar support structure. Alternatively, the one or more heating conductors can also be glued to the planar support structure. The fixing thread can form an embroidery. The embroidery can be electrically conductive or electrically non-conductive. The one or more heating conductors fixed to the planar support structure preferably run in one heating conductor plane or in several heating conductor planes parallel to each other.The fixing thread preferably runs at least partially perpendicular or orthogonal to the one or more heating conductor planes. In particular, the one or more heating conductors can run essentially longitudinally along or through the filter medium, with the fixing thread running at least partially transversely to them.

[0030] Furthermore, a filter medium according to the invention is advantageous in which the sorption material of the at least one sorption layer is a granular material and / or a powdered material. The granular and / or powdered sorption material can be immobilized by means of a fixing agent, for example, by means of an adhesive. Alternatively, the granular and / or powdered sorption material can also be embedded in a material receiving structure, in particular without a fixing agent. The material receiving structure can be a textile material receiving structure. The sorption material of the at least one sorption layer can also comprise fibrous material. The at least one sorption layer can be produced by dip coating a nonwoven fabric with amine functionalization.

[0031] In a particularly preferred embodiment, the filter medium according to the invention has at least two sorption layers and one heating layer, the heating layer being arranged between the two sorption layers. The filter medium preferably has a sandwich layer structure. Preferably, the filter medium has the following layer structure: sorption layer-heating layer-sorption layer. This layer structure can also be repeated one above the other, thus reducing the number of heating layers. Consequently, fewer heating layers need to be traversed during the adsorption phase. The filter medium can further have the following layer structure: sorption layer-heating layer-sorption layer-heating layer. With this layer structure, a particularly high heating power is available for the desorption phase relative to the number of sorption layers.

[0032] In another preferred embodiment, the filter medium according to the invention comprises at least one temperature sensor for detecting and / or controlling the temperature in a temperature detection area of ​​the filter medium. The filter medium can have one or more temperature sensors. The temperature detection area can be located in the at least one sorption layer or at the resistance heater. In a multi-layered structure, the temperature sensors can be arranged in different layers. The at least one temperature sensor can be a thermistor (PTC) or a thermistor (NCT).

[0033] The problem underlying the invention is further solved by a sorption filter of the type mentioned above, wherein the filter medium of the sorption filter according to the invention is designed according to one of the embodiments described above. With regard to the advantages and modifications of the sorption filter according to the invention, reference is therefore first made to the advantages and modifications of the filter medium according to the invention.

[0034] In a preferred embodiment of the sorption filter according to the invention, the filter body has a circumferential, in particular a cylindrical or conical, basic shape. Alternatively or additionally, the filter medium can be folded multiple times and / or wound spirally. Alternatively, the filter body can have a non-circular, in particular flat or cuboid, basic shape and / or the filter medium is unfolded and / or not wound. The filter body can be composed of several concentric shells.

[0035] In another preferred embodiment, the sorption filter according to the invention has one or more contact elements for electrically connecting the resistance heater to an electrical power supply device. The one or more contact elements can be components of a connector. The connector can be a multi-connector for the ends of the resistance heater, preferably including plug-in options for thermocouples. One or more contact elements can serve to energize the resistance heater. One or more contact elements can be connected to a temperature sensor to provide a temperature signal. The connector can, for example, be a multi-pole or multimodal connector. The connector can, for example, be an industrial connector or a CEE 7 / 4 connector.

[0036] Furthermore, a sorption filter according to the invention is preferred, which has a support tube. The filter medium is supported by the support tube. The filter medium preferably surrounds the support tube. Alternatively, the support tube can also surround the filter medium. The support tube is preferably a perforated plastic body. The support tube can be a laser-welded support tube. Preferably, the support tube consists of tube sections which are welded together at the butt joints. Alternatively, the sorption filter can also be designed without a support tube, since the resistance heating has a stabilizing effect. The sorption filter can comprise one, two, or more than two end discs. The sorption filter can be constructed as a stack. The sorption filter can be stabilized by one or more circumferential strapping bands, either alternatively or in addition to the support tube.

[0037] The problem underlying the invention is further solved by a sorption system of the type mentioned above, wherein the sorption filter of the sorption system according to the invention comprises a filter medium according to one of the embodiments described above, or is designed according to one of the embodiments described above, and the electrical power supply device is configured to energize the resistance heating of the filter medium of the sorption filter. With regard to the advantages and modifications of the sorption system according to the invention, reference is first made to the advantages and modifications of the sorption filter according to the invention and the advantages and modifications of the filter medium according to the invention.

[0038] The sorption system preferably includes an electronic control device for controlling the operation of the resistance heating of the filter medium.

[0039] The problem underlying the invention is further solved by a method for energizing a sorption system, wherein the method according to the invention comprises the following step: energizing the resistance heating of the filter medium of the sorption filter by means of an electrical power supply device of the sorption system. Preferably, a sorption system with a sorption filter according to one of the embodiments described above, or a sorption system according to one of the embodiments described above, is operated by means of the method according to the invention. With regard to the advantages and modifications of the method according to the invention for operating a sorption system, reference is therefore made to the advantages and modifications of the sorption system according to the invention and the advantages and modifications of the sorption filter according to the invention.

[0040] The problem underlying the invention is further solved by a method for producing a sorption filter of the type mentioned above, wherein the method according to the invention comprises the following steps: providing an electric resistance heater with one or more electrically conductive heating elements for heating the sorption material of the at least one sorption layer and producing a filter medium from the at least one sorption layer and the electric resistance heater. Preferably, a sorption filter according to one of the embodiments described above is produced by means of the method. With regard to the advantages and modifications of the method according to the invention for producing a sorption filter, reference is therefore first made to the advantages and modifications of the sorption filter according to the invention.

[0041] In a preferred embodiment of the manufacturing process according to the invention, the electrical resistance heating system comprises at least one heating layer, wherein the generation of a filter medium comprises the formation of a multilayer structure consisting of the at least one sorption layer and the at least one heating layer. The formation of the multilayer structure can include the positioning of the at least one sorption layer and the at least one heating layer one above the other.

[0042] Furthermore, a manufacturing process according to the invention is preferred in which the at least one sorption layer and / or the at least one heating layer are unfolded when forming the multilayer structure, and pleating is applied to the at least one sorption layer and / or the at least one heating layer after forming the multilayer structure. Alternatively or additionally, pleating is applied to the at least one sorption layer and / or the at least one heating layer before forming the multilayer structure, and the at least one sorption layer and / or the at least one heating layer are pre-pleated when forming the multilayer structure. The pleating process involves pleating. Pleating is preferably carried out using a knife pleating machine. The at least one sorption layer is preferably cut from a continuous strip of sorption layer material.At least one heating layer is preferably cut from a continuous strip of heating layer material.

[0043] In a further preferred embodiment of the manufacturing process according to the invention, the heating layer is removed from the filter medium of a used sorption filter, wherein the provided electrical resistance heater comprises the heating layer removed from the filter medium of the used sorption filter. The sorption material of the used sorption filter may, for example, have already reached the end of its service life, whereby the heating layer, due to its considerably longer service life, can be reused in another sorption filter.

[0044] Preferred embodiments of the invention are explained and described in more detail below with reference to the accompanying drawings. These show:

[0045] Fig. 1 shows a sorption filter according to the invention in a side view;

[0046] Fig. 2 shows the sorption filter depicted in Fig. 1 in a cross-sectional view with a detailed representation of a section of the filter medium;

[0047] Fig. 3 shows a sorption filter according to the invention in a partially cut side view;

[0048] Fig. 4 shows a sorption filter according to the invention with a cylindrical basic shape in a sectional view;

[0049] Fig. 5 shows another sorption filter according to the invention with a cylindrical basic shape in a sectional view;

[0050] Fig. 6 shows a sorption filter according to the invention with a flat base shape in a sectional view; Fig. 7 shows another sorption filter according to the invention with a flat base shape in a sectional view;

[0051] Fig. 8 shows the resistance heating of a sorption filter according to the invention in a top view;

[0052] Fig. 9 shows the resistance heater with folded edges shown in Fig. 8 in a top view and the associated sorption filter in a lateral sectional view;

[0053] Fig. 10 shows the resistance heating of a sorption filter according to the invention in a top view and the associated sorption filter in a lateral sectional view;

[0054] Fig. 11 Resistance heaters for sorption filters according to the invention in a top view and an associated sorption filter in a side sectional view;

[0055] Fig. 12 shows the resistance heating of a sorption filter according to the invention in a top view;

[0056] Fig. 13 shows a schematic representation of a manufacturing plant for producing a sorption filter according to the invention;

[0057] Fig. 14 shows a further manufacturing plant for producing a sorption filter according to the invention in a schematic representation; and

[0058] Fig. 15 shows a schematic representation of the formation of a layer structure according to a method according to the invention for producing a sorption filter.

[0059] Figures 1 and 2 show a sorption filter 100 for use in a sorption system. The sorption filter 100 comprises a filter body 102, wherein the filter body 102 has a pleated filter medium 10. The filter body 102 has a circumferential cylindrical shape such that the inner pleat edges of the filter medium 10 lie on an inner surface plane and the outer pleat edges lie on an outer surface plane.

[0060] The filter medium 10 has a multilayer structure 12. The structure 12 comprises two sorption layers 14a, 14b and a heating layer 16. The heating layer 16 is part of an electric resistance heater 18. The heating layer 16 is arranged between the sorption layers 14a, 14b, so that the filter medium 10 has a sandwich structure. The sorption layers 14a, 14b comprise sorption material for adsorbing and / or desorbing at least one greenhouse gas, namely carbon dioxide. The heating layer 16 serves to heat the sorption material of the sorption layers 14a, 14b. The electric resistance heater allows for the efficient conversion of electrical energy into heat energy.

[0061] The sorption filter 100 shown in Fig. 3 has a cylindrical filter body 102, wherein the filter medium 10 of the filter body 102 is folded multiple times.

[0062] The sorption filter 100 comprises a support tube 104 against which the filter medium 10 is supported. The filter medium 10 surrounds the inner support tube 104. End discs 106a, 106b are located at the end faces of the filter medium 10. The support tube 104 and the end discs 106a, 106b stabilize the filter body 102. The end discs 106a, 106b provide annular pleat recesses for the end faces of the pleated filter medium 10.

[0063] The sorption filter 100 has two contact elements 108a, 108b for electrically contacting the resistance heater 18 with an electrical power supply device.

[0064] Fig. 4 shows a sorption filter 100, wherein the filter medium 10 of the filter body 102 has an unfolded layer structure 12. The layer structure 12 comprises several sorption layers 14a-14d and several heating layers 16a-16c. In the layer structure 12 of the filter medium 10, sorption layers 14a-14d and heating layers 16a-16c alternate, with the diameter of the individual layers 14a-14d, 16a-16c increasing from the inside out. The filter body 12 has a cylindrical basic shape.

[0065] In the sorption filter 100 shown in Fig. 5, the filter medium 10 is two-layered and comprises a sorption layer 14 and a heating layer 16. The layer structure 12 consisting of the sorption layer 14 and the heating layer 16 is wound in a spiral shape.

[0066] Fig. 6 shows a sorption filter 100 in which the filter body 102 has a cuboid, flat base shape. The filter medium 10, consisting of two outer sorption layers 14a, 14b and a heating layer 16 arranged between the sorption layers 14a, 14b, is folded multiple times and has a pleated structure.

[0067] In the sorption filter 100 shown in Fig. 7, the filter body 102 also has a flat basic shape, with the layer structure 12 consisting of several sorption layers 14a-14d and several heating layers 16a-16c. The layer structure 12 is unfolded.

[0068] Figure 8 shows that the resistance heater 18 has an electrically conductive heating conductor 20. The heating conductor 20 is an electrically conductive strand of copper filaments. The heating conductor 20 comprises several parallel heating conductor sections that can be electrically energized in series. The heating conductor 20 is supported by a planar support structure 22. The planar support structure 22 is a mesh-like support layer. The planar support structure 22 is an air-permeable mesh structure, and the heating conductor 20 is fixed to the planar support structure 22 by means of a fixing thread 24. The heating conductor 20 is sewn to the planar support structure 22.

[0069] The resistance heater 18 has contact poles 26a, 26b for electrically contacting the heating conductor 20. As an alternative to the direct current supply shown, alternating current supply is also possible in other embodiments.

[0070] Fig. 9 additionally shows fold edges 28 of the pleated layer structure 12 of the filter medium 10. The heating conductor sections, which run parallel to each other, extend in a direction of extension that is perpendicular to the direction of extension of the fold edges 28.

[0071] Fig. 10 shows a resistance heater 18, which was manufactured from a continuous strip of material. For this purpose, the continuous strip of material was cut along the dividing line 30, so that the heating conductor 20 was also severed in the region of the dividing line 30. By correcting the conductor path of the heating conductor 20 in the region of the dividing line 30, a contact point 26a can be created. Together with the contact point 26b, the heating layer 16 can then be energized. The parallel heating conductor sections of the heating conductor 20 extend in a direction that is parallel to the direction of the fold edges 28 of the layer structure 12.

[0072] The continuous material strip shown in Fig. 11 comprises two heating fields 36a, 36b, each with a heating conductor 20. The heating fields 36a, 36b can be separated into an upper heating layer strip and a lower heating layer strip by a severance cut along the severance line 32. If this separation is not made, a heating layer with two heating fields 36a, 36b can be produced using this configuration. Other continuous material strips can also have more than two heating fields 36a, 36b, whereby heating layers with one or more heating fields 36a, 36b can be produced by cutting the continuous material strip. The size of the heating layer, as well as the number and arrangement of the heating fields of the cut heating layers, depends on the sorption filter to be manufactured. The heating fields can be energized together or independently of each other.

[0073] The heating layer strips are cut to length by a separation cut along the separation line 30, whereby the heating conductors 20 of the heating layers 16a, 16b are cut through during the separation cut along the separation line 30.

[0074] In the resistance heater 18 shown in Fig. 12, several series-connected heating fields 36a-36c are arranged one behind the other. Between the heating fields 36a-36c are areas free of heating loops, where, for example, dividing lines 30 can be provided. By cutting, heating layers 16 with one or more heating fields 36a-36c can be produced. The size of the heating layer, as well as the number and arrangement of the heating fields of the cut heating layers, depends on the sorption filter to be manufactured.

[0075] Fig. 13 shows a manufacturing plant 200 for producing a pleated filter medium 10 of a sorption filter 100.

[0076] Material rolls 202a and 202b provide sorption layer material 14a and 14b. Material roll 204 provides heating layer material 16. The sorption layers 14a and 14b and the heating layer 16 are combined to form a sandwich layer structure 12 and pleated using a knife pleating machine 206.

[0077] In the production plant 200 shown in Fig. 14, a two-layer structure 34 is first produced from the sorption layers 14a, 14b and pleated using the knife pleating machine 206. A heating layer 16 of a resistance heater 18 is initially not present.

[0078] As shown in Fig. 15, the heating layer 16 of the resistance heater 18 is removed from the layer structure 12' of a filter medium 10' of a used sorption filter. If the resistance heater 18 consists only of the heating layer 16, the entire resistance heater 18 is removed. If the resistance heater 18 includes additional parts besides the heating layer 16, only part of the resistance heater 18 is removed. The removed heating layer 16 can, for example, be formed by one or more heating conductors. The removed heating layer can also include a support structure on which one or more heating conductors are fixed. Since the removed heating layer 16 is already pleated, it can now be arranged between the pre-pleated sorption layers 14a, 14b (see Fig. 14). This results in a multi-layered structure consisting of two outer sorption layers 14a, 14b and a heating layer 16 arranged between the sorption layers 14a, 14b. Reference symbol

[0079] 10, 10' filter medium

[0080] 12, 12' Layer construction

[0081] 14, 14a-14d sorption layers

[0082] 16, 16a-16c Heating layers

[0083] 18 Resistance heating

[0084] 20 heating conductors

[0085] 22 Support structure

[0086] 24 fixing threads

[0087] 26a, 26b Contact poles

[0088] 28 fold lines

[0089] 30 dividing lines

[0090] 32 Dividing line

[0091] 34-layer construction

[0092] 36a-36c Heating fields

[0093] 100 sorption filters

[0094] 102 filter bodies

[0095] 104 Support tube

[0096] 106a, 106b End discs

[0097] 108a, 108b Contact elements

[0098] 200 production plant

[0099] 202a, 202b Material rolls

[0100] 204 roll of material

[0101] 206 Knife Folding Machine

Claims

Claims 1. Filter medium (10) for use in a sorption filter (100), comprising at least one sorption layer (14, 14a-14d) which includes sorption material for adsorbing and / or desorbing at least one greenhouse gas; characterized by an electric resistance heater (18) with one or more electrically conductive heating conductors (20) for heating the sorption material of at least one sorption layer (14, 14a-14d).

2. Filter medium (10) according to claim 1, characterized in that the electrical resistance heating (18) comprises at least one heating layer (16, 16a-16c), wherein the at least one sorption layer (14, 14a-14d) and the at least one heating layer (16, 16a-16c) preferably form a multilayer layer structure (12).

3. Filter medium (10) according to claim 1 or 2, characterized in that the heating layer (16, 16a-16c) or the multi-layered layer structure (12) is formed in multiple folded forms.

4. Filter medium (10) according to one of the preceding claims, characterized in that the resistance heater (18) or the one or more heating conductors (20) of the resistance heater (18) can be detached from the at least one sorption layer (14, 14a-14d) without damage.

5. Filter medium (10) according to one of the preceding claims, characterized in that several electrically energizable heating conductor sections in series or several electrically energizable heating conductors (20) run parallel to each other.

6. Filter medium (10) according to one of the preceding claims, characterized in that the one or more heating conductors (20) are supported by at least one planar support structure (22).

7. Filter medium (10) according to claim 6, characterized by the fact that the planar support structure (22) is designed as a mesh layer.

8. Filter medium (10) according to claim 6 or 7, characterized in that the one or more heating conductors (20) are fixed on the planar support structure (22).

9. Filter medium (10) according to one of the preceding claims, characterized in that the sorption material of the at least one sorption layer (14, 14a-14d) is a granular material and / or a powdered material.

10. Filter medium (10) according to one of the preceding claims, characterized by at least two sorption layers (14, 14a-14d) and a heating layer (16, 16a-16c), wherein the heating layer (16, 16a-16c) is arranged between the two sorption layers (14, 14a-14d).

11. Filter medium (10) according to one of the preceding claims, characterized by at least one temperature sensor for detecting and / or controlling the temperature in a temperature detection range of the filter medium (10).

12. Sorption filter (100) for use in a sorption plant, comprising a filter body (102) comprising a filter medium (10); characterized in that the filter medium (10) is designed according to one of the preceding claims.

13. Sorption filter (100) according to claim 12, characterized in that the filter body (102) has a circumferential, in particular a cylindrical or conical, basic shape; and / or the filter medium (10) is folded multiple times and / or wound spirally.

14. Sorption filter (100) according to claim 12 or 13, characterized by one or more contact elements (108a, 108b) for electrically contacting the resistance heater (18) with an electrical power supply device.

15. Sorption filter (100) according to one of claims 12 to 14, characterized in that the sorption filter (100) a support tube (104) against which the filter medium (10) is supported; or is designed without support tubes and / or has a strapping band for stabilizing the filter medium (10).

16. Sorption plant, with a sorption filter (100); and an electrical power supply device; characterized in that the sorption filter (100) has a filter medium (10) according to one of claims 1 to 11 or is designed according to one of claims 12 to 15 and the electrical power supply device is configured to energize the resistance heating (18) of the filter medium (10) of the sorption filter (100).

17. Method for operating a sorption plant, in particular a sorption plant with a sorption filter (100) according to one of claims 12 to 15 or a sorption plant according to claim 16, characterized by the step: - 21 - Powering the resistance heating (18) of the filter medium (10) of the sorption filter (100) by means of an electrical power supply device of the sorption system.

18. Method for producing a sorption filter (100), in particular a sorption filter (100) according to one of claims 12 to 15, comprising the step: Providing at least one sorption layer (14, 14a-14d) comprising sorption material for adsorbing and / or desorbing at least one greenhouse gas; characterized by the steps: Providing an electric resistance heater (18) with one or more electrically conductive heating conductors (20) for heating the sorption material of at least one sorption layer (14, 14a-14d); and Generating a filter medium (10) from the at least one sorption layer (14, 14a-14d) and the electrical resistance heating (18).

19. Method according to claim 18, characterized in that the electrical resistance heating (18) comprises at least one heating layer (16, 16a-16c), wherein the generation of a filter medium (10) comprises the formation of a multilayer layer structure (12) from the at least one sorption layer (14, 14a-14d) and the at least one heating layer (16, 16a-16c).

20. Method according to claim 19, characterized by the fact that which at least one sorption layer (14, 14a-14d) and / or at least one heating layer (16, 16a-16c) are unfolded when forming the multilayer layer structure (12) and folds are introduced into the at least one sorption layer (14, 14a-14d) and / or at least one heating layer (16, 16a-16c) after forming the multilayer layer structure (12); and / or a folding in which at least one sorption layer (14, 14a-14d) and / or at least one heating layer (16, 16a-16c) is formed before the formation of the multilayer layer structure (12) and at least one sorption layer (14, 14a-14d) and / or at least one heating layer (16, 16a-16c) are prefolded during the formation of the multilayer layer structure (12).

21. Method according to claim 19 or 20 characterized by the step: - Removal of the heating layer (16, 16a-16c) from a filter medium (10) of a used sorption filter (100); wherein the provided electrical resistance heating (18) comprises the heating layer (16, 16a-16c) taken from the filter medium (10) of the sorption filter (100) used.

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