DE102022121020A1 - Process for separating carbon dioxide from the ambient air and installation for carrying out such a process - Google Patents

Abstract

The invention relates to a method for separating carbon dioxide (52) from the ambient air (50). The procedure includes at least the following steps:
- Supplying ambient air (50) to a system (10) for separating carbon dioxide (52) from the ambient air (50),
- Manipulating the ambient air (50), carbon dioxide (52) being separated from the ambient air (50) and the ambient air (50) being dehumidified in the form of condensing water (54),
- expulsion of manipulated, carbon dioxide-reduced ambient air (56), the condensed water (54) of the manipulated ambient air (50) being fed back at least indirectly in order to increase the humidity of the manipulated, carbon dioxide-reduced ambient air (56).
The invention also relates to a system (10) for separating carbon dioxide (52) from the ambient air (50), which is set up to carry out such a method.

Description

The invention relates to a method for separating carbon dioxide (CO ₂ ) and water from the ambient air and for the subsequent re-humidification of the ambient air and a system for carrying out such a method.

Systems and methods for separating carbon dioxide from the ambient air are known. Such a separation can be carried out according to the so-called "direct air capture" process, whereby the carbon dioxide can be separated directly from the ambient air and fed to a further process. In a direct air capture process, not only is carbon dioxide removed from the ambient air, but also the humidity is reduced and water is separated due to the process. After passing through the system for carbon dioxide separation, the air is therefore poorer in both carbon dioxide and humidity. In the case of large-scale systems in particular, this can lead to an air flow with dry, warm air being blown out, which can dry out the surroundings. This can lead to damage to the environment and should be avoided against the background of the most environmentally friendly separation of carbon dioxide possible.

So reveals the EP 2 077 911 A2 a method and apparatus for extracting carbon dioxide from air. The device comprises an anion exchange material which is bound in a matrix exposed to an air flow. The extracted carbon dioxide can be fed into an environment or another process step for further processing in a controlled manner.

The EP 2 077 911 A2 provides for the extraction of carbon dioxide from air using conventional extraction methods or by using one of the disclosed extraction methods, in particular extraction of carbon dioxide by means of a humidity swing or electrodialysis. It is envisaged that the extracted carbon dioxide will be sent to greenhouses, whereby the increased amount of carbon dioxide can improve the growth conditions in the greenhouses. Alternatively, carbon dioxide can also be added to an algae culture.

It is also known to feed carbon dioxide separated in the direct air capture process to a process plant in order to produce a synthetic fuel from the carbon dioxide and other input materials.

US 2018/0 214 822 A1 discloses a system and a method for removing carbon dioxide from the ambient air using a sorbent in order to obtain relatively pure carbon dioxide. The carbon dioxide is removed from the sorbent using process heat, preferably in the form of steam, at a temperature in the range of no greater than about 130°C to capture the relatively pure carbon dioxide and regenerate the sorbent for repeated use. Increased efficiency can be achieved by admixing a smaller amount of a preferably pretreated exhaust gas containing a higher concentration of carbon dioxide to the ambient air prior to contacting the sorbent. The captured carbon dioxide can be stored for further use or permanently sequestered. The above process provides purified carbon dioxide for further use in agriculture and chemical processes or for permanent sequestration.

A disadvantage of the methods known from the prior art, however, is that in addition to the desired separation of carbon dioxide, the humidity of the ambient air is also reduced. If large systems are used for the direct separation of carbon dioxide from the ambient air, a flow of dry air is to be expected on the side of the drier output, which will dry out the environment. In the context of an environmental impact assessment of the technology, this represents an intervention in the environment and should be compensated accordingly in order to increase environmental compatibility.

The object of the invention is now to increase the environmental compatibility when separating carbon dioxide from the ambient air and in particular to prevent the ambient air from drying out.

• - Zuführen von Umgebungsluft in eine Anlage zur Abtrennung von Kohlenstoffdioxid aus der Umgebungsluft,
• - Manipulieren der Umgebungsluft, wobei Kohlenstoffdioxid aus der Umgebungsluft abgetrennt und der Umgebungsluft Luftfeuchte in Form von sorbiertem und/oder kondensierendem Wasser entzogen wird,
• - Austreiben von manipulierter, Kohlenstoffdioxid-reduzierter Umgebungsluft, wobei das sorbierte und/oder kondensierte Wasser der manipulierten, Kohlenstoffdioxid-reduzierten Umgebungsluft zumindest mittelbar wieder zugeführt wird, um die Luftfeuchte der manipulierten, Kohlenstoffdioxid-reduzierten Umgebungsluft zu erhöhen.

This object is achieved by a process for separating carbon dioxide from the ambient air, which comprises the following steps:

• - Supplying ambient air to a system for separating carbon dioxide from the ambient air,
• - Manipulating the ambient air, with carbon dioxide being separated from the ambient air and the ambient air being dehumidified in the form of sorbed and/or condensing water,
• - Expulsion of manipulated, carbon dioxide-reduced ambient air, the sorbed and / or condensed water of the manipulated, carbon dioxide-reduced ambient air is at least indirectly fed back to the humidity of the manipu balanced, carbon dioxide-reduced ambient air.

The method according to the invention makes it possible to release the atmospheric moisture removed from the ambient air during the separation of the carbon dioxide back into the expelled, manipulated carbon dioxide-reduced ambient air, thereby minimizing the impact on the environment and increasing the environmental compatibility of the method. In particular, damage to fauna and flora can be minimized by an air flow with dry exhaust air from the plant.

The additional features listed in the dependent claims allow advantageous further developments and improvements to the method proposed in the independent claim for separating carbon dioxide from the ambient air.

In a preferred embodiment of the invention, it is provided that the condensed water is fed to a system that forms fluid particles, and the fluid particles are fed to the manipulated, carbon dioxide-reduced ambient air. By introducing fluid particles, the manipulated ambient air can be moistened again in a particularly simple manner. The increase in humidity is all the more effective the smaller the size of the fluid particles. At the same time, this lowers the air temperature so that the relative humidity continues to rise.

Alternatively, it is advantageously provided that a system for evaporative cooling is used in order to supply the evaporating water to the manipulated, carbon dioxide-reduced ambient air from the system for separating carbon dioxide from the ambient air. In this case, the evaporation element is preferably positioned directly in an exhaust air stream of the system for separating carbon dioxide from the ambient air, as a result of which the cooling capacity of this system can also be increased and the entire process can be carried out in an energy-optimized manner. In addition, the air humidity can also be increased again comparatively easily and inexpensively by means of evaporative cooling in order to increase the environmental compatibility of the process. At the same time, this lowers the air temperature so that the relative humidity continues to rise.

Alternatively, the condensed water can also be discharged into the manipulated, carbon dioxide-reduced ambient air using a sprinkler system. The humidification of the manipulated, carbon dioxide-reduced ambient air is supported by an air flow that leaves the system for separating carbon dioxide from the ambient air. Sprinkling the condensed water is another simple and inexpensive way to rehumidify the manipulated, carbon dioxide-reduced ambient air. The water is rained out on an outlet side of the system for separating carbon dioxide from the ambient air and gets there directly through direct absorption by the exhaust air flow and indirectly through evaporation into the exhaust air. Evaporation can be promoted if the exhaust air flow from the system for separating carbon dioxide from the ambient air flows over the rain-covered water and absorbs this as humidity.

According to a further advantageous embodiment of the method, the water extracted from the ambient air is reintroduced into the manipulated, carbon dioxide-reduced ambient air by means of a trickling cooling system on a building which is located directly in an exhaust air duct of the system.

Alternatively, the condensed water can also be applied to a plot of land in the direction of the exhaust air flow, e.g. in the form of a field, using an irrigation system. The use of an irrigation system would enable agriculture (e.g. orchards, horticulture, pasture) and still minimize the impact on the environment.

The water extracted from the ambient air can be introduced at a central discharge point. Preference is given to discharging the water at a number of inlet points which are connected in parallel or sequentially in the direction of flow of an exhaust air flow with manipulated, carbon dioxide-reduced air from the process of the plant. Thus, the humidity can be adjusted individually and in particular the amount of water released can be adjusted to the relative humidity of the exhaust air flow in order to achieve the fastest possible and most even absorption of the water.

In an advantageous embodiment of the method, it is provided that the manipulation of the ambient air includes heating and/or cooling of the supplied ambient air. In order to achieve efficient separation of carbon dioxide from the ambient air, it is necessary to manipulate the ambient air accordingly. The manipulation can in particular include heating the ambient air, cooling the ambient air and a sequential combination of heating and cooling or cooling and heating. This can also be done through heat transfer processes that aim to reduce the energy requirement. esp In particular, the carbon dioxide is separated by a sorbent which binds the carbon dioxide in the fresh air supplied. Both liquid and solid sorbents are known as sorbents, which bind the carbon dioxide by means of adsorption or absorption. Furthermore, organic-inorganic hybrid sorbents are known, which consist of amines such as monoethanolamine (MEA), diethanolamine (DEA) or methyldiethanolamine (DMEA) and also bind the carbon dioxide.

An improvement of the method provides that a carbon dioxide content of the ambient air before it is fed to the system for separating carbon dioxide and/or a carbon dioxide content of the manipulated ambient air is recorded. By detecting the carbon dioxide content, the control of the process can be improved, so that the amount of water supplied to the manipulated, carbon dioxide-reduced ambient air can be controlled. In particular, the difference in the carbon dioxide content before and after the separation process can be used to deduce an associated dehumidification of the manipulated, carbon dioxide-reduced ambient air and this loss can be at least largely compensated for by the supply of water.

Alternatively or additionally, it is advantageously provided that a humidity of the ambient air before it is fed to the system for separating carbon dioxide from the ambient air and/or a humidity of the manipulated ambient air is recorded. By detecting the humidity, the control of the process can be improved, so that the amount of water supplied to the manipulated, carbon dioxide-reduced ambient air can be controlled. In particular, by comparing the humidity before and after the separation of the carbon dioxide, it can be concluded how much water was removed from the air and what amount of water has to be fed back into the manipulated, carbon dioxide-reduced ambient air to compensate.

Alternatively or additionally, it is advantageously provided that a temperature of the ambient air before it is fed to the system for separating carbon dioxide from the ambient air and/or a temperature of the manipulated, carbon dioxide-reduced ambient air is recorded. Since the ambient air can absorb significantly more moisture as the temperature rises and the relative humidity is highly dependent on the temperature of the ambient air, the control of the method can be further improved by detecting the ambient temperature. In particular, by detecting the temperature before and after the separation of the carbon dioxide, the amount of water removed from the ambient air can be calculated and compensated accordingly when the exhaust air flow from the plant is humidified.

Alternatively or additionally, it is advantageously provided that a mass flow of the ambient air flowing into the system for separating carbon dioxide from the ambient air is recorded. By determining the mass flow, the control of the process can be further improved and the humidification of the exhaust air can be further optimized.

A further improvement of the method provides that the amount of water supplied to the manipulated, carbon dioxide-reduced ambient air is controlled or regulated as a function of at least one of the parameters humidity, carbon dioxide content, temperature or mass flow of the ambient air or the manipulated ambient air. In order to enable a controlled release of the condensed water to the manipulated, carbon dioxide-reduced ambient air, it is advantageous to control the amount of water fed to the exhaust air stream. As a result, the environmental compatibility can be further optimized.

It is particularly preferred if a mass flow of water fed to the fluid particle-forming system, the system for evaporative cooling or the sprinkling system is controlled or regulated as a function of at least one of the parameters humidity, carbon dioxide content, temperature or mass flow of the ambient air or the manipulated ambient air. Since the fluid particle formation and the evaporation of the water in particular are limited by the process parameters, it is helpful to pre-control these processes accordingly in order to achieve a desired target value for the relative humidity of the manipulated, carbon dioxide-reduced and humidified ambient air on the exhaust air side of the plant for the separation of reach carbon dioxide.

In an advantageous embodiment of the method, it is provided that water is introduced into the manipulated, carbon dioxide-reduced ambient air at the same geodetic height as a gas stream of the manipulated, carbon dioxide-reduced ambient air leaving the plant. It can thereby be ensured that at least a large part of the water introduced, preferably all of the water introduced into the gas stream, changes into the gaseous state of aggregation and moistens the air and does not hit the ground as precipitation. This is a particularly efficient humidification of the gas still possible. Care is taken to ensure that the gas stream exiting from the system and the ambient air preferably only mix to a large extent when the gas stream exiting from the system has been correspondingly moistened and once again has the humidity level of the ambient air. By introducing the water at a defined height and at a defined distance from the system, a drop in temperature and an increase in the relative humidity of the gas flow leaving the system can be prevented. As a result, the separated water can be introduced into the gas flow particularly efficiently and effectively.

It is particularly preferred if the introduction takes place in the middle of the gas flow leaving the plant in manipulated, carbon dioxide-reduced ambient air. By introducing the water in the middle of the gas flow that exits the system, a particularly efficient and rapid humidification of the gas flow is possible, so that the air humidity downstream of the system essentially corresponds to the air humidity upstream of the system and only the carbon dioxide content of the air is reduced .

In a further advantageous further development of the method, provision is made for the water requirement of a landscape downstream of an outlet of the system to be determined, with the manipulated, carbon dioxide-reduced ambient air being humidified depending on the water requirement of the landscape. In order to avoid environmental damage caused by a reduction in humidity, it is particularly important to know the water requirement on the side of the plant from which the gas flow exits again after the carbon dioxide has been separated. The humidity requirement is preferably determined before the installation of the system and recorded in a suitable model. The model can be updated and/or continuously expanded by measuring requirement parameters. In particular, the water demand depending on the seasons, the wind direction, wind speed, solar radiation, cloud cover, air composition and anthropogenic emitters can be included in the model.

It is particularly preferred if the output of the system for separating carbon dioxide from the ambient air is regulated as a function of the determined water requirement. The system for separating carbon dioxide from the ambient air is regulated in the range of 0 - 100% of its capacity. The refeeding of separated water to humidify the gas flow leaving the plant also takes place in the range of 0 - 100%, but is so high that the separated water can be reintroduced into the gas flow within a reasonable period of time. In addition, additional water can be introduced into the gas flow, for example to compensate for a temperature change in the gas flow in the system. The system is preferably controlled on the basis of the model or on the basis of the current measured values in the landscape downstream of the system.

A further partial aspect of the invention relates to a system for separating carbon dioxide from the ambient air, which is set up to carry out a method for separating carbon dioxide from the ambient air and subsequent rehumidification of the exhaust air, as described in the previous paragraphs. A system can also include several individual systems that form an overall system in the manner of a wind farm and the wind turbines set up there. In this application, both an individual system and an overall system with two or more individual systems are to be subsumed under the term "system".

An advantageous embodiment of the system provides that for each outlet at which a gas stream of manipulated, carbon dioxide-reduced ambient air is emitted into the environment, an introduction point for introducing water into the manipulated, carbon dioxide-reduced ambient air is provided. This enables efficient and effective humidification of the gas flow emerging from the plant, so that the air humidity downstream of the plant essentially corresponds to the air humidity upstream of the plant and only the carbon dioxide content of the air is reduced.

It is particularly preferred if two or more introduction points for introducing water into the manipulated, carbon dioxide-reduced ambient air are provided for each outlet at which a gas stream of manipulated, carbon dioxide-reduced ambient air is emitted into the environment. As a result, the amount of water introduced into the gas flow can be divided up so that only a comparatively small amount of water is introduced into the gas flow at each introduction point and this can be used particularly effectively for humidifying the gas flow.

Alternatively, it is advantageously provided that an introduction point or several introduction points is/are arranged between two outlets at which a gas flow of manipulated, carbon dioxide-reduced ambient air is emitted into the environment.
Such an entry point or such Entry points are particularly helpful if the evaporation of the water is to be delayed somewhat, since the flow velocity between the outlets is lower than directly in the outflow direction of the respective outlet.

In a further advantageous embodiment of the system, it is provided that two or more gas streams of manipulated, carbon dioxide-reduced ambient air are brought together in a collection device, with at least one introduction point, preferably several introduction points, for introducing water into the manipulated, carbon dioxide reduced ambient air is arranged or formed. As a result, the number of necessary introduction points can be reduced without significantly reducing the efficiency of the humidification of the gas flow.

According to an advantageous embodiment of the system, it is provided that the introduction points are distributed over at least 90% of the width, preferably over the entire width of the outlets of the system. It can thereby be ensured that the edge areas downstream of the system are also sufficiently moistened and that there are no sub-areas of the gas flow or individual gas flows leaving the system which have a significantly reduced humidity compared to the ambient air.

Unless stated otherwise in the individual case, the various embodiments of the invention mentioned in this application can advantageously be combined with one another.

• 1 eine schematische Darstellung einer aus dem Stand der Technik bekannten Anlage zur unmittelbaren Abscheidung von Kohlenstoffdioxid aus der Umgebungsluft;
• 2 ein bevorzugtes Ausführungsbeispiel einer erfindungsgemäßen Anlage zur Abtrennung von Kohlenstoffdioxid aus der Umgebungsluft;
• 3 ein Ablaufdiagramm zur Durchführung eines erfindungsgemäßen Verfahrens zur Abtrennung von Kohlenstoffdioxid aus der Umgebungsluft;
• 4 eine weitere schematische Darstellung einer erfindungsgemäßen Anlage zur Abtrennung von Kohlenstoffdioxid aus der Umgebungsluft;
• 5 ein System aus einer Mehrzahl solcher Anlagen, welche entlang einer Küsten- oder Uferlinie eines Gewässers oder eines Meeres angeordnet sind;
• 6 eine weitere schematische Darstellung einer erfindungsgemäßen Anlage, bei welcher sich stromabwärts eines Auslasses der Anlage eine Landschaft in Form eines Biotops befindet; und
• 7 ein weiteres Ausführungsbeispiel einer erfindungsgemäßen Anlage zur Abtrennung von Kohlenstoffdioxid aus der Umgebungsluft, bei der eine Anordnung von Einbringpunkten zur Einbringung von Wasser in die manipulierte Luft dargestellt ist.

The invention is explained below in exemplary embodiments with reference to the associated drawings. Show it:

• 1 a schematic representation of a plant known from the prior art for the direct separation of carbon dioxide from the ambient air;
• 2 a preferred embodiment of a system according to the invention for separating carbon dioxide from the ambient air;
• 3 a flowchart for carrying out a method according to the invention for separating carbon dioxide from the ambient air;
• 4 a further schematic representation of a system according to the invention for the separation of carbon dioxide from the ambient air;
• 5 a system of a plurality of such installations arranged along a coastline or shoreline of a body of water or sea;
• 6 a further schematic representation of a system according to the invention, in which downstream of an outlet of the system there is a landscape in the form of a biotope; and
• 7 a further exemplary embodiment of a system according to the invention for separating carbon dioxide from the ambient air, in which an arrangement of introduction points for introducing water into the manipulated air is shown.

1 shows a system 10 known from the prior art for separating carbon dioxide from the ambient air. Moist air, in particular from an onshore wind, is supplied to the system 10 and carbon dioxide and water are removed from this air. An exhaust air stream flows out of the system 10, which has dry, carbon dioxide-reduced air compared to the air flowing in.

In 2 a system 10 according to the invention for carrying out a method according to the invention for separating carbon dioxide from the ambient air by means of a direct air capture method is shown. The system 10 includes an air supply system 20 in which an air flow is conveyed by a conveying element 23, in particular a blower, to the separation unit 14 or a process chamber 14. The air supply system 20 includes an air line 21 in which a plurality of sensors 22 , 24 , 26 , 28 for detecting a mass flow and/or volume flow of the ambient air 50 fed to the separation unit 14 or the process chamber 14 are arranged. The sensors 22 , 24 , 26 , 28 are preferably arranged in the air line 21 upstream of the conveying element 23 . In particular, an air humidity sensor 22 , a sensor for detecting the carbon dioxide content 24 , a temperature sensor 26 and a mass and/or volume flow sensor 28 are arranged on or in the air line 21 . Furthermore, an inlet valve 12 is arranged in the air line 21 with which an inflow of ambient air 50 to the separation unit 14 or the process chamber 14 can be controlled. To improve the process, further sensors 62 , 64 , 66 , in particular a further humidity sensor 62 , a further sensor for detecting the carbon dioxide concentration 64 and a further temperature sensor 66 , can be arranged downstream of the conveying element 23 .

The system 10 also has a process space 14 or a separation unit 14 in which the supplied ambient air 50 is manipulated and carbon dioxide 52 and water 54 are removed from ambient air 50 . For manipulation, the process space 14 or the separation unit 14 can be heated, in particular by a heat source 16, cooled by a cold source 18 or sequentially cooled and heated or heated and cooled. The supply of heat or cold to the process space 14 or to the separating unit 14 can take place in particular through a heat exchanger 19 . A first air flow with carbon dioxide-rich, moist air is discharged from the process chamber 14 or the separation unit 14 via a first line 78 and a second air flow of dry, carbon dioxide-reduced ambient air 56 is discharged via a second line 88 . A first valve 70 is positioned in the first conduit 78 to control the first flow of air. Further sensors 72 , 74 , 76 , in particular a further humidity sensor 72 , a further sensor for detecting the carbon dioxide concentration 74 and a further temperature sensor 76 can also be arranged in this first line 78 .

Furthermore, a water separation unit 30 is arranged in the first line 78 with which the water 54 is separated from the carbon dioxide-rich air flow and is fed to a storage container 34 . The water 54 can be supplied from this reservoir 34 to a system 40 forming fluid particles by means of a conveying element 36, in particular by means of a pump. For this purpose, a mass flow sensor 38 can be arranged on the conveying element 36 in order to control the amount of water conveyed from the reservoir 34 . The fluid particle-forming system 40 is used to generate fluid particles from the water 54 and to feed them in a controlled manner to an exhaust air flow exiting the system 10 with dry, carbon dioxide-reduced ambient air in order to moisten this exhaust air flow.

A second valve 80 for controlling the flow of air through the second line 88 is arranged in the second line 88 . Furthermore, further sensors 82 , 84 , 86 , in particular a further humidity sensor 82 , a further sensor for detecting the carbon dioxide content 84 and a further temperature sensor 86 can be arranged in the second line 88 .

The system 10 also has a control device 90 with a memory unit 92 and a computing unit 94 , a machine-readable program code 96 being stored in the memory unit 92 . If this program code 96 is executed by the computing unit 94, the control unit 90 controls the method described below for separating carbon dioxide from the ambient air and subsequent humidification of the manipulated, carbon dioxide-reduced ambient air.

In 3 a flowchart for carrying out a method according to the invention for separating carbon dioxide from the ambient air is shown. An air flow with ambient air 50 is fed to a system 10 for separating carbon dioxide from the ambient air on an inlet side and carbon dioxide 52 is separated from this ambient air 50 in a known manipulation method. When the carbon dioxide 52 is separated, water 54 is removed from the ambient air 50 and condenses in the system 10 . A manipulated, dehumidified and carbon dioxide-reduced air flow 56 exits the system 10 . The water condensed during the separation of the carbon dioxide 52 is fed to a system 40 that forms fluid particles and is introduced into the exhaust air flow by this system. This creates an exhaust air flow 58 with humidified, carbon dioxide-reduced exhaust air, which is returned to the environment. Even if this air flow now has less carbon dioxide and the temperature may have changed as a result of the manipulation, the environmental compatibility of the process can be significantly improved by feeding the water into the exhaust air flow and the effects on fauna and flora can be minimized.

4 shows a further schematic representation of a plant 10 according to the invention for separating carbon dioxide 52 from the ambient air 50. The plant 10 comprises a process chamber 14, in which water 54 and carbon dioxide 52 are separated from the ambient air. The system 10 also has a reservoir 34 in which the separated water 54 is collected. The reservoir 34 is connected to a conveying element 36 via a line, via which the water 54 can be conveyed to one or more introduction points 46 , 48 downstream of the process space 14 . The introduction points 46, 48 are arranged in such a way that they enable the water 54 to be introduced directly into a gas flow 68 which exits the system 10. The water 54 can be introduced as shown at the first introduction point 46 by spraying water mist into the gas stream 68 from below. Alternatively or additionally, the water 54 can be introduced, also as shown at a further introduction point 48 , by spraying water mist in the direction of the gas flow 68 . Also alternatively or additionally, the water mist can also be rained onto the gas flow 68 from above or sprayed into the side of the gas flow 68 in order to ensure thorough mixing of the gas flow 68 exiting from the system 10 with dry, carbon dioxide-reduced air 56 and the water 54 achieve and thus to achieve efficient humidification of the gas stream 68.

In 5 a system of a plurality of such systems 10 for the separation of carbon dioxide 52 from the ambient air 50, which are arranged along a coastline 104 or shoreline of a body of water or a sea 106 to form an overall system, is shown. A plurality of individual systems 10 for separating carbon dioxide 52 from the ambient air 50 are set up along a coastline 104 of a body of water, preferably a sea 106, in order to separate off a sufficient amount of carbon dioxide 52 . In addition to the carbon dioxide 52 , the process also separates water 54 from the ambient air 52 at the individual systems 10 . This separated water 54 can be collected from different individual systems 10 . In order to avoid negative influences on the landscape 100 downstream of the coastline 104, the same volume of water 54 that is separated off by the systems 10 as part of the process control is preferably reintroduced into the ambient air 50. Alternatively, instead of the separated water 54, fresh water can also be introduced into the ambient air 50. The water 54 is preferably introduced over the entire width of the coastline 104 on which the individual systems 10 of the overall system are located. The water 54 can be fed in through one or more introduction points 46 , 48 . It is preferred that the humidification of a gas flow 68 leaving the system 10 takes place in the immediate vicinity of the system 10 and the humidity downstream of the entire system essentially corresponds to the humidity on the coastline 104 before entry into the system 10 .

6 shows a further schematic representation of a system 10 according to the invention for separating carbon dioxide 52 from the ambient air 50, in which a landscape 100 in the form of a biotope 102 is located downstream of an outlet 42, 44 of the system 10. The performance of the system 10 is regulated as a function of the water requirement of the biotope 102. The control can be done in particular by a model that includes, among other things, the season, the position of the biotope 102, the wind direction, the wind speed, the temperature, the solar radiation, the cloud level, the composition of the air and anthropogenic emitters. Furthermore, sensors for determining relevant parameters, for example a temperature sensor 26 and/or an air humidity sensor 22, can be arranged on the biotope. A first introduction point 46 for introducing water 54 into the biotope 102 is provided on the biotope 102 . Furthermore, a second introduction point 48 for introducing carbon dioxide 52 into the biotope 102 can be provided on the biotope 102 in order to specifically support plant growth in the biotope 102 during growth periods.

In 7 Another exemplary embodiment of a system 10 according to the invention for separating carbon dioxide 52 from the ambient air 50 is shown, in which an arrangement of introduction points 46, 48 for introducing water 54 into the manipulated dry, carbon dioxide-reduced air 56 is shown. where is in 7 a system 10 with a process space 14 with a plurality of outlets 42, 44 for gas streams 68 of dried, carbon dioxide-reduced air 56 is shown. One or more introduction points 46, 48 for introducing water 54 into the gas stream 68 can be provided. The introduction points 46, 48 are preferably distributed over the entire cross section of the system 10 in order to achieve humidification of the gas flow 68 that is as uniform as possible, so that the gas flow 68 exiting the system 10 downstream of the introduction points 46, 48 has essentially the same humidity as a air flow of ambient air 50 entering the process space 14 of the system 10 . The introduction points 46, 48 are preferably each arranged in the center of the axis of the gas streams 68 exiting from the system 10. Alternatively, the introduction points 46, 48 can also be arranged offset to the central axes of the exiting gas streams 68. In particular, introduction points 46, 48 can be arranged at the same geodetic height between two outlets 42, 44 of the process space 14 of the plant 10. Furthermore, one or more collecting device(s) 98 can be provided in order to combine two gas streams 68 emerging from different outlets 42, 44 of the system 10. At least one introduction point 46, 48 is provided at the junction in order to moisten the gas flow 68 and to increase the humidity downstream of the system 10 compared to the humidity immediately after exiting the process room 14 and thus the negative effects of manipulating the air in the process room 14 to minimize.

Reference List

10

Attachment

12

intake valve

14

Separation unit, process room

16

heat source

18

cold source

19

heat exchanger

20

air supply system

21

air line

22

humidity sensor

23

conveying element

24

Sensor for recording the carbon dioxide content

26

temperature sensor

28

Mass flow sensor, volume flow sensor

30

water separation unit

32

water separator

34

reservoir

36

conveying element

38

mass flow sensor

40

Fluid particle forming plant

42

outlet of the plant

44

further outlet of the plant

46

insertion point

48

another entry point

50

ambient air

52

carbon dioxide

54

Water

56

dry, carbon dioxide-reduced air

58

humidified, carbon dioxide-reduced air

62

humidity sensor

64

Sensor for recording the carbon dioxide content

66

temperature sensor

68

Escaping gas stream

69

center of the exiting gas stream

70

first exhaust valve

72

humidity sensor

74

Sensor for recording the carbon dioxide content

76

temperature sensor

78

first line

80

second exhaust valve

82

humidity sensor

84

Sensor for recording the carbon dioxide content

86

temperature sensor

88

second line

90

control unit

92

storage unit

94

unit of account

96

program code

98

collection device

100

Landscape

102

biotope

104

coastline

106

sea

QUOTES INCLUDED IN DESCRIPTION

This list of documents cited by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent Literature Cited

• EP 2077911 A2 [0003, 0004]

Claims (15)

Method for separating carbon dioxide (52) from the ambient air (50), comprising the following steps: - Supplying ambient air (50) to a system (10) for separating carbon dioxide (52) from the ambient air (50), - Manipulating the ambient air (50), carbon dioxide (52) being separated from the ambient air (50) and the ambient air (50) being dehumidified in the form of sorbed and/or condensing water (54), - Expelling manipulated, carbon dioxide-reduced ambient air (56), the sorbed and/or condensed water (54) of the manipulated ambient air (50) being fed back at least indirectly in order to increase the humidity of the manipulated, carbon dioxide-reduced ambient air (56). increase. Method for separating carbon dioxide (52) from the ambient air (50). claim 1 , wherein the condensed water (54) is fed to a fluid particle-forming plant (40), and the fluid particles are fed to the manipulated, carbon dioxide-reduced ambient air (56). Method for separating carbon dioxide (52) from the ambient air (50). claim 1 or 2 , wherein the manipulation of the ambient air comprises heating and/or cooling the supplied ambient air (50). Method for separating carbon dioxide (52) from the ambient air (50) according to one of Claims 1 until 3 , wherein a carbon dioxide content of the ambient air (50) before it is fed to the system (10) for separating carbon dioxide (52) and/or a carbon dioxide content in the manipulated, carbon dioxide-reduced ambient air (56) is detected. Method for separating carbon dioxide (52) from the ambient air (50) according to one of Claims 1 until 4 , wherein a humidity of the ambient air (50) before it is supplied to the system (10) for separating carbon dioxide (52) and/or a humidity in the manipulated, carbon dioxide-reduced ambient air (56) is detected. Method for separating carbon dioxide (52) from the ambient air (50) according to one of Claims 1 until 5 , wherein water (54) is introduced into the manipulated, carbon dioxide-reduced ambient air (56) at the same geodetic height as a gas stream (68) leaving the plant (10) with manipulated, carbon dioxide-reduced ambient air (56). Method for separating carbon dioxide (52) from the ambient air (50). claim 6 , wherein the introduction in the middle (69) of the gas flow (68) leaving the plant (10) takes place in manipulated, carbon dioxide-reduced ambient air (56). Method for separating carbon dioxide (52) from the ambient air (50) according to one of Claims 1 until 7 , wherein the water requirement of a landscape (100) downstream of an outlet (42, 44) of the system (10) is determined, the manipulated, carbon dioxide-reduced ambient air (56) being humidified depending on the water requirement of the landscape (100). . Method for separating carbon dioxide (52) from the ambient air (50). claim 10 , wherein a power control of the system (10) for separating carbon dioxide (52) from the ambient air (50) takes place as a function of the determined water requirement. Plant (10) for separating carbon dioxide (52) from the ambient air (50), wherein the plant (10) is set up to use a method according to one of Claims 1 until 9 to perform. Plant (10) for separating carbon dioxide (52) from the ambient air (50). claim 10 , wherein for each outlet (42, 44) at which a gas flow (68) of manipulated, carbon dioxide-reduced ambient air (56) is emitted, an introduction point (46, 48) for introducing water (54) into the manipulated, carbon dioxide - Reduced ambient air (56) is provided. Plant (10) for separating carbon dioxide (52) from the ambient air (50). claim 10 , wherein for each outlet (42, 44) at which a gas flow (68) of manipulated, carbon dioxide-reduced ambient air (56) is emitted, two or more introduction points (46, 48) for introducing water (54) into the manipulated , Carbon dioxide-reduced ambient air (56) is provided. System (10) for separating carbon dioxide (52) from the ambient air (50) according to one of Claims 10 until 12 wherein an introduction point (46) or several introduction points (46, 48) is/are arranged between two outlets (42, 44) at which a gas flow (68) of manipulated, carbon dioxide-reduced ambient air (56) is emitted. System (10) for separating carbon dioxide (52) from the ambient air (50) according to a the Claims 10 until 13 , wherein two or more gas streams (68) of manipulated, carbon dioxide-reduced ambient air (56) are brought together in a collecting device (98), wherein in this collecting device (98) there is at least one introduction point (46, 48) for introducing water (54) is arranged or formed in the manipulated, carbon dioxide-reduced ambient air (56). System (10) for separating carbon dioxide (52) from the ambient air (50) according to one of Claims 11 until 14 , wherein the introduction points (46, 48) are distributed over at least 90% of the width of the outlets (42, 44) of the system (10).

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