Method and device for producing a h2-co-gas mixture

Abstract

The invention relates to a method for producing a product gas (P) with a system comprising an electrolyzer (E) and a detector, wherein a gas mixture comprising hydrogen and carbon monoxide is formed by electrolysis, the composition of the gas mixture is analyzed by the detector, and, depending on the result of the analysis, a portion of the hydrogen is fed into the electrolyzer (E) to carry out the electrolysis, and another portion of the gas mixture is discharged from the system as product gas (P). The invention also relates to a system for carrying out the method.

Description

[0001] The invention relates to a device and a method for producing a gas mixture consisting of hydrogen and carbon monoxide.

[0002] From the unpublished German patent application with the official file number 102024204571.3 it is known to produce a gas mixture formed from hydrogen and carbon monoxide by electrolysis.

[0003] The production of a gas mixture formed from hydrogen and carbon monoxide is to be further developed.

[0004] The object of the invention is achieved by a method with the features of the first claim. The dependent claim relates to a device for carrying out the method. The dependent claims relate to advantageous embodiments.

[0005] The invention relates to a method for producing a product gas using a system. The system may include an electrolyzer and a detector. A gas mixture comprising hydrogen and carbon monoxide can be formed by electrolysis. The composition of the gas mixture can be analyzed by the detector. Depending on the result of the analysis, a portion of the gas mixture can remain within the system. This portion may, for example, be hydrogen that has been separated from the gas mixture. Separated hydrogen can be stored within the system. Separated hydrogen can be fed into the electrolyzer to carry out electrolysis. A portion of the gas mixture can be discharged from the system as product gas.

[0006] The result of an analysis can be such that 100% of the gas mixture is removed from the system as product gas. Alternatively, the result of an analysis can be such that only a portion of the gas mixture is removed from the system as product gas, for example, only 80%. The remaining portion can either stay within the system or be processed within the system.

[0007] To separate a gas mixture into distinct components, one or more components can be used to isolate gases from the mixture. These components can be configured to isolate a desired product gas. They can also be configured to produce a desired product gas with a specific composition. Furthermore, they can be configured to isolate gases from a gas mixture that can be used for electrolysis. Finally, they can be configured to isolate carbon dioxide, carbon monoxide, or hydrogen from a gas mixture.

[0008] A gas mixture from which a gas is separated can be, directly or indirectly, a gas mixture produced by electrolysis. A gas mixture produced by electrolysis can contain hydrogen, carbon monoxide, and / or carbon dioxide, or consist of hydrogen, carbon monoxide, and / or carbon dioxide.

[0009] A component capable of separating a gas from a gas mixture may incorporate a gas separation membrane for this purpose. This membrane may operate on the principle of selective permeation through its surface to separate the gas from the mixture.

[0010] Separating gases can improve the efficiency of a system.

[0011] Unconverted carbon dioxide can be separated from an electrolyzer outlet stream formed by or containing a gas mixture, for example, using a CO₂ separation membrane in a component designed for this purpose. The separated carbon dioxide can be used to increase the efficiency of the electrolysis process. Separated carbon dioxide can, for example, be fed into the aforementioned exchange column to improve efficiency. Carbon dioxide can be introduced into the exchange column, for example, together with an externally drawn-in gas containing carbon dioxide, such as one using a compressor.

[0012] This makes it possible to achieve 100% CO2 utilization and thus optimized CO2 recycling with net CO2 emissions of zero.

[0013] Separation can yield a gas mixture containing or consisting solely of carbon monoxide and hydrogen. This gas mixture can be the product gas, which can be extracted from the system for further processing. Alternatively, this gas mixture can be further processed within the system to produce a product gas with a desired composition, which can then be extracted from the system for further processing.

[0014] Further processing can, for example, achieve a desired hydrogen-carbon monoxide composition, which then forms the product gas. Excess hydrogen can be used to carry out electrolysis, thereby further improving efficiency.

[0015] A component for separating a gas from a gas mixture can separate a gas mixture consisting entirely or at least substantially of carbon monoxide and hydrogen in such a way that, on the one hand, a gas stream of hydrogen is produced, and on the other hand, a gas stream of carbon monoxide. The component can then include a CO-H₂ separation membrane (G) to accomplish this. It can also include a component for removing impurities in order to obtain the purest possible carbon monoxide and / or hydrogen. For example, the hydrogen gas stream can be passed through a component for removing impurities to eliminate carbon monoxide impurities from the gas stream. This component can be a PFSA column.

[0016] In the context of separating carbon monoxide (CO) from hydrogen (H₂), the term "PFSA column" refers to a column containing a support material made of perfluorosulfonic acid (PFSA) or a PFSA-based ion exchange material. This column is designed to utilize the properties of perfluorosulfonic acid to selectively separate carbon monoxide from hydrogen. The separation mechanism is based on the interaction between the specific surface properties of the PFSA and the gas mixture to be separated, with the acidic properties of the PFSA playing a crucial role in the selective adsorption or interaction with carbon monoxide.

[0017] In CO separation applications, the PFSA column can be used as a filter or adsorption medium to remove carbon monoxide from a hydrogen stream, particularly in hydrogen purification and processing processes. The PFSA column enables the removal of unwanted carbon monoxide impurities from the hydrogen stream, thus ensuring a higher purity of the hydrogen product.

[0018] The hydrogen stream can advantageously be used directly or indirectly to carry out electrolysis for increasing the yield. In particular, hydrogen can be metered to an anode of the electrolyzer to perform a hydrogen oxidation reaction.

[0019] If an excess of hydrogen is produced in the electrolyzer, for example due to changes in the selectivity of an existing catalyst or due to pH fluctuations in the electrolyte, the remainder can be transferred and stored, for example, in a tank. Alternatively or additionally, excess hydrogen can be recombined with carbon monoxide to obtain a desired product gas composition. Alternatively or additionally, gas can be drawn from the tank to carry out electrolysis and / or to produce a desired hydrogen-carbon monoxide composition, which can then be the product gas.

[0020] An interactive cycle can therefore be created in which a hydrogen gas storage tank, i.e., the aforementioned tank, can act as a volume buffer. Excess hydrogen can thus either be stored or made available for further use within the system. Active amortization and control of dynamic changes in operating conditions and process requirements are possible. Effective responses can be made to fluctuations in process parameters during operation. A variety of different compositions can be extracted from the system as product gas. The product gas can be pure carbon monoxide. The product gas can be a mixture of carbon monoxide and hydrogen. Desired gas mixture compositions can be adjusted to achieve a specific product gas composition when extracted from the system.

[0021] To carry out electrolysis, carbon dioxide can be separated from or extracted from a gas. The gas containing carbon dioxide can be introduced into the system. Alternatively, the gas containing carbon dioxide can be drawn into the system, for example, using a compressor. In one embodiment of the process, carbon dioxide is separated from, or extracted from, air or another gas. The air can be ambient air, i.e., the air surrounding the system. The other gas can be an industrial exhaust gas containing carbon dioxide.

[0022] Industrial exhaust gas is a gaseous byproduct released during industrial processes. Industrial exhaust gases, which include carbon dioxide, are frequently produced during the combustion of fuels, the chemical processing of materials, or other industrial processes such as smelting, welding, painting, or drying.

[0023] Carbon dioxide can be separated from air or other gases using an electrolyte solution. The gas, for example air or industrial exhaust gas, can be passed through an exchange column for separation. The electrolyte solution is then passed through the exchange column to separate the carbon dioxide from the gas. For efficiency, the gas and the electrolyte solution can be passed through the exchange column in opposite directions.

[0024] The electrolyte solution can be stored in a container. The electrolyte solution can be transferred from the container through a pipe into the exchange column to separate carbon dioxide from the gas.

[0025] The electrolyte solution can be an aqueous potassium hydroxide solution. Carbon dioxide (CO₂) from the air or another gas can be captured by reaction with an aqueous potassium hydroxide (KOH) solution. In this process, the CO₂ is bound in the form of potassium carbonate (K₂CO₃) and potassium bicarbonate (KHCO₃).

[0026] When the carbon dioxide-containing gas is introduced into the KOH solution, the carbon dioxide first reacts with the hydroxide ion (OH -< ) and forms potassium carbonate (K 2 CO 3 ): 2 KOH + CO 2 → K 2 CO 3 + H 2 O.

[0027] This reaction leads to the formation of potassium carbonate and water. The CO₂ from the air is bound as carbonate in this process.

[0028] At lower CO2 concentrations, or if the solution has already absorbed a lot of CO2, potassium bicarbonate (KHCO3) can form instead of potassium carbonate: K2CO3 + CO2 + H2O → 2 KHCO3.

[0029] According to this reaction, the previously formed potassium carbonate reacts with additional CO₂ and water to form potassium bicarbonate. This form of bond is particularly stable at higher CO₂ concentrations in the solution.

[0030] Therefore, K 2 CO 3(aq.) as well as KHCO 3 (aq.) and thus a separation solution can be formed.

[0031] The separation solution can be discharged from the exchange column. The discharged separation solution can be introduced into an electrolyzer to produce a gas mixture containing carbon monoxide and hydrogen. Alternatively, the discharged separation solution can be directed into a container. The separation solution can be temporarily stored in this container. From the container, the separation solution can be introduced into the electrolyzer to produce the gas mixture containing carbon monoxide and hydrogen. The container can be the same one previously mentioned, in which the electrolyte solution is stored. To carry out the electrolysis, a mixture of the separation solution and the electrolyte solution can then be introduced into the electrolyzer.

[0032] The deposition solution, or the deposition solution and electrolyte solution, can be introduced into the cathode compartment of the electrolyzer to carry out electrolysis. An electrocatalytic reaction can then take place in the cathode compartment, producing a gas mixture containing hydrogen and carbon dioxide.

[0033] The following chemical reactions can take place in the cathode space: CO -2< 3 (aq.) + 2H +< (aq.) → i-CO 2 + H 2 O (I.) HCO -< 3 (aq.) + H +< (aq.) → i-CO 2 + H 2 O (I.) i-CO 2 + 2H +< (aq.) + 2e -< → CO (g.) + H 2 O (I.) 2H 2 O (I.) + 2e -< → H 2(g.) + 2OH -< (aq.) 2H +< (aq.) + 2e -< → H 2(g.)

[0034] Hydrogen can be introduced into the anode compartment of the electrolyzer to carry out the electrolysis. The process can preferably be carried out such that a hydrogen oxidation reaction takes place in the anode compartment of the electrolyzer as follows: H₂(g.) → 2H⁺(aq.) + 2e⁻ 2H₂O(l.) → O₂(g.) + 4H⁺(aq.) + 4e⁻

[0035] This allows the energy required for electrolysis to be kept low. Furthermore, the use of problematic catalyst materials can be avoided.

[0036] The hydrogen oxidation reaction (HOR) is an electrochemical reaction in which molecular hydrogen (H₂) is split into protons (H⁺) and electrons (e⁻). Thus, hydrogen gas (H₂) is split into two protons (H⁺) and two electrons (e⁻).

[0037] The invention further relates to a system for carrying out a previously described method. The system can include an electrolyzer. The system can include a first component comprising a detector. The detector can analyze the composition of a gas mixture containing hydrogen and carbon monoxide. In particular, the detector can determine the proportions of hydrogen and carbon monoxide in the gas mixture. The system can be configured such that, depending on the determined composition, at least a portion of the hydrogen is fed into the electrolyzer for electrolysis. The system can also be configured such that, depending on the determined composition, at least a portion of the gas mixture can be discharged from the system as product gas.

[0038] The system may include a line through which an external gas can be introduced into the system. The system may include a compressor for drawing in external gas. The system may have a line through which external gas introduced into the system can be introduced into an exchange column. To utilize gravity for transporting the external gas introduced into the system through the exchange column, the introduced external gas may enter the exchange column via a line at the bottom of the column. A line may be provided through which gas can exit the exchange column after an exchange. This line may be located at or near the top of the exchange column to maximize the efficiency of the desired exchange within the column.

[0039] A container for storing a potassium hydroxide solution may be provided. A line may be provided to transfer potassium hydroxide solution stored in the container into the exchange column. The exchange column and the container may be arranged so that a potassium hydroxide solution can be introduced into the exchange column by gravity (B) or pumped into it. Alternatively or additionally, a pump may be provided to transfer a potassium hydroxide solution from the container into the exchange column. The line may open at or near the top of the exchange column, thus entering the exchange column. Gravity can then be used to transfer the solution through the exchange column. The line may open at or near the top of the container to avoid leakage problems.The pipe can enter at or near the bottom of the container. The pipe can extend almost to the bottom of the container.

[0040] The system may include a line that terminates at or near the bottom of the exchange column. A solution can be discharged from the exchange column via this line following the exchange process. The discharged solution can be fed directly or indirectly into the cathode compartment of the electrolyzer. A pump may be provided to remove the solution from the exchange column after an exchange. Alternatively or additionally, the solution can be discharged from the exchange column by gravity. A vessel connected to the line may be present, allowing a potassium hydroxide solution enriched with carbon dioxide to be introduced into the vessel. The line may terminate at or near the top of the vessel to avoid leakage problems.It could be the container that is already in place for storing a potassium hydroxide solution.

[0041] A line, and optionally a pump, may be connected to the vessel and the cathode compartment of the electrolyzer, allowing the carbon dioxide-enriched potassium hydroxide solution to be introduced into the cathode compartment. The line may enter the vessel at the top or into the top to avoid leakage problems. The line may extend almost to the bottom of the vessel. Alternatively, the line may enter the vessel at the bottom or at the bottom. The vessel and electrolyzer may also be arranged so that the carbon dioxide-enriched potassium hydroxide solution can be drawn into the cathode compartment by gravity.The potassium hydroxide solution enriched with carbon dioxide is preferably introduced at one end face or at one end face of the cathode compartment of the electrolyzer in order to efficiently carry out electrolysis.

[0042] A line may be present that connects to the cathode compartment of the electrolyzer. This line may open at the opposite end face of the cathode compartment to enable efficient electrolysis. A gas mixture produced by electrolysis in the electrolyzer can be discharged directly or indirectly from the system via this line. The gas mixture can also be introduced directly or indirectly into the component containing a detector for analyzing its composition. Alternatively, the gas mixture can be introduced into a container via this line. This container may be the one used to store the potassium hydroxide solution. Finally, the gas mixture can be introduced into the container through the top of the container via this line.The container can be sealed or made gas-tight in such a way that gas can be stored in the container.

[0043] A line may be present, connected to the container and the component, through which carbon dioxide can be separated from carbon monoxide and hydrogen, for example, by a membrane. A gas mixture can be introduced from the container into the component via this line. The line can enter the container at the top or near the top. Gas can then be reliably extracted from the container using simple technical means. However, it is also conceivable that the line enters the container at a different side.

[0044] A line may be connected to the component that separates carbon dioxide from carbon monoxide and hydrogen, through which a gas mixture can be introduced into the component containing the detector. This gas mixture may have carbon dioxide filtered out. In this case, the gas mixture consists entirely or predominantly of carbon monoxide and hydrogen. A compressor may be present to pump the gas mixture into the component containing the detector.

[0045] The component containing the detector may include a mixing valve through which the gas flow from the component can be controlled. The mixing valve may be electronic. A control unit may be present for controlling the mixing valve. A line may be connected to the component containing the detector, through which a gas mixture can be at least partially discharged from the component and the system. This discharge may depend on the position of the mixing valve. A line may also be connected to the component containing the detector, through which a gas mixture can be at least partially discharged from the component to a component of the system, where, for example, carbon monoxide can be separated from hydrogen using a membrane.

[0046] A conduit can be connected to the component through which carbon monoxide can be separated from hydrogen. This conduit allows carbon monoxide to be discharged directly or indirectly from the component and the system. The conduit can connect to another conduit through which a gas mixture from the component containing the detector can be discharged from the system.

[0047] A line can be connected to the component that separates carbon monoxide from hydrogen. Hydrogen can be fed, directly or indirectly, from the component, completely or partially into the anode compartment of the electrolyzer via this line. Hydrogen can also be fed, directly or indirectly, from the component, completely or partially out of the system via this line. Hydrogen can be fed, directly or indirectly, into another line through which a gas mixture from the component containing the detector can be fed out of the system via this line. Hydrogen can also be fed, directly or indirectly, into another line into which carbon monoxide from the component that separates carbon monoxide from hydrogen can be fed.

[0048] A pressure regulator may be present, through which hydrogen can be fed from the component that separates hydrogen from carbon monoxide into the anode compartment of the electrolyzer via pipes. The pressure regulator then controls the pressure in the anode compartment. Alternatively or additionally, hydrogen can be discharged from the system directly or indirectly through the pressure regulator. This hydrogen can first be fed into a component that can analyze the gas composition and / or regulate the gas flow, for example, using a mixing valve.

[0049] A tank may be present into which a line feeds, allowing hydrogen to be extracted from the component that separates hydrogen from carbon monoxide. Hydrogen can be fed into the tank. The tank may be intended for the intermediate storage of hydrogen. A pump and / or a pressure regulator may be present to enable the introduction of hydrogen into the tank and / or the control of the pressure within the tank.

[0050] Hydrogen can be drawn from the tank via a line. A compressor may be provided for this purpose. A pressure regulator may be present to control the hydrogen flow and / or to maintain a specific pressure within the tank. The hydrogen drawn from the tank can be introduced into a component that allows for gas composition analysis and / or through which the flow of hydrogen can be controlled by means of a mixing valve. From this component, hydrogen can, for example, be selectively introduced into the anode compartment of the electrolyzer and / or discharged directly or indirectly from the system.

[0051] A compressor, as defined in the present invention, is a component capable of pumping a gas. A pump, as defined in the present invention, is a component capable of pumping a liquid.

[0052] An electrolyzer particularly well-suited for electrolysis may incorporate a metal phthalocyanine. The electrode may consist of iron, zinc, or copper phthalocyanine. The electrode may be an active cathodic electrode. The metal phthalocyanine of the electrode may be deposited on a porous substrate. The metal phthalocyanine may be deposited on a carbon-containing substrate. The metal phthalocyanine may be anchored to carbon nanoparticles. The carbon nanoparticles may be nitrogen-doped carbon nanoparticles.

[0053] Metal phthalocyanine can serve as a catalyst in the electrolyzer.

[0054] The invention is explained in more detail below using figures. They show

[0055] Figure 1: Device for the production of a product gas; Figure 2: Carrying out an electrolysis in the electrolyzer.

[0056] The Figure 1Figure 1 shows a device for producing a product gas. Air or another carbon dioxide-containing external gas can be drawn in via line 1, for example, using a compressor A. The drawn-in gas can be introduced into an exchange column B via line 2. The drawn-in gas can be introduced into the exchange column B from below, so that the gas can rise by gravity during the exchange process. Following an exchange in the exchange column B, the gas can exit the column via line 3 at or near the top of the column. This preferably occurs at the top of the column to utilize gravity for exit. An aqueous potassium hydroxide solution can be introduced into the exchange column B from a container D via line 4 using a pump C.This can be achieved by passing through the top of the exchange column B, allowing liquid to flow downwards through the column due to gravity. It may be sufficient for this to occur at the top. Within the exchange column B, an exchange can take place between the liquid electrolyte and the carbon dioxide from the air or the CO₂-containing gas. The potassium hydroxide solution, enriched with carbon dioxide and thus obtained through exchange, can be returned to container D, for example, by gravity, via line 5. From container D, the carbon dioxide-enriched potassium hydroxide solution can be pumped by pump C via line 6 into the cathode compartment of an electrolyzer E. In the cathode compartment, the gas mixture produced by electrolysis can be returned to container D via line 7.The gas mixture can consist of carbon monoxide, hydrogen, and carbon dioxide. The gas mixture can be fed via line 8 into component F, where carbon dioxide can be separated from carbon monoxide and hydrogen, for example, using a membrane. The separated carbon dioxide can then be fed back into the exchange column B via line 9. Using a compressor A, for example, the remaining gas mixture, containing carbon monoxide and hydrogen, can be fed via line 10 to component H, which may include a detector and an electronic mixing valve. The detector determines the composition of the gas mixture. If the composition matches a desired value, the gas mixture, now called product gas P, can be discharged from the system via line 11, controlled by the mixing valve. The resulting product gas P can then be extracted for use.If it is detected that the composition does not correspond to the desired product gas, the gas mixture can be directed by the mixing valve via line 12 into component G, where carbon monoxide can be separated from hydrogen, for example, using a membrane. Separated hydrogen can be directed via line 13 into a PFSA column I for the extraction of trace amounts of carbon monoxide. Via line 14, the hydrogen, now further purified of carbon monoxide, can be directed by a compressor A into a hydrogen tank K. Hydrogen can be fed from component G into line 15, which leads to the anode compartment of the electrolyzer E, via a pressure regulator J. Alternatively or additionally, hydrogen can be directed via the pressure regulator to component H. A second pressure regulator J may be present, through which line 14 passes, to regulate the pressure in tank K.Hydrogen can be drawn from tank K via line 15 and conveyed via line 15 to a component H, which may include a detector and an electronic mixing valve. A third pressure regulator may be present in this line to regulate pressures.

[0057] Hydrogen can be metered into the anode compartment of the electrolyzer E via line 15 using component H. Hydrogen can also be metered into line 17 via line 16 using component H. Carbon monoxide from component G can also be metered into line 17. Hydrogen can be metered into line 17 to produce a product gas P with the desired composition. The product gas P can then be fed into line 11 and discharged from the system.

[0058] A mixture of hydrogen (H₂) and carbon monoxide (CO) is called synthesis gas, or syngas for short. Such a gas mixture can be used, for example, to produce synthetic fuels, methanol, or for ammonia synthesis. Syngas can be used as fuel in gas turbines or internal combustion engines to generate electricity and heat. Syngas can also be used in fuel cells for direct power generation.

[0059] The Figure 2 This outlines the processes in an electrolyzer with a proton exchange membrane on the anode side (-) and on the cathode side (+). The two compartments are separated by the proton exchange membrane. Hydrogen (H₂) from the anode compartment passes through the proton exchange membrane as a proton (H⁺). On the cathode side, a gas mixture containing hydrogen and oxygen is then formed from the protons and the introduced solution, also with the aid of an electric current.

Claims

1. A method for producing a product gas (P) with a system comprising an electrolyzer (E) and a detector, wherein a gas mixture comprising hydrogen and carbon monoxide is formed by electrolysis, wherein the composition of the gas mixture is analyzed by the detector, wherein, depending on the result of the analysis, a proportion of the hydrogen is fed into the electrolyzer to carry out the electrolysis and another proportion of the gas mixture is discharged from the system as product gas (P).

2. Method according to the preceding claim, characterized by the fact thatFor the electrolysis, carbon dioxide is extracted from a gas, wherein the gas is air from the environment of the system or an industrial exhaust gas, wherein carbon dioxide is extracted from the gas using an aqueous potassium hydroxide solution and using an exchange column (B), and a separation solution from the exchange column (B) is introduced into the cathode compartment of the electrolyzer for the formation of the gas mixture.

3. Method according to the preceding claim, characterized by the fact that Carbon dioxide is separated from the gas mixture and the separated carbon dioxide is used to carry out the electrolysis.

4. System for carrying out a method according to one of the preceding claims, comprising an electrolyzer (E) and a component (H) comprising a detector, wherein the system is configured such that the composition of the gas mixture can be analyzed by the detector, wherein, depending on the result of the analysis, a portion of the hydrogen can be directed into the electrolyzer to carry out the electrolysis and another portion of the gas mixture can be directed out of the system as product gas (P).

5. System according to the preceding claim, characterized by the fact thata line (1) is connected to a compressor (A) for drawing in external gas, a line (2) is connected to the compressor (A) and to or at the bottom of an exchange column (B) in such a way that drawn-in external gas can be introduced into the bottom of the exchange column (B), and a line (3) is provided at or at the top of the exchange column (B) through which gas can leave the exchange column (B).

6. System according to one of the two preceding claims, characterized by the fact that a container (D) for storing a potassium hydroxide solution is provided, wherein a line (4) and a pump (C) are provided such that potassium hydroxide solution stored in the container (D) can be pumped into the top of the exchange column (B).

7. System according to one of the three preceding claims, characterized by the fact thata line (5) at the bottom of the exchange column (B) and a container (D) connected to the line (5) are provided, so that a potassium hydroxide solution enriched with carbon dioxide can be introduced into the container (D), and that a line (6) connected to the container (D) and the cathode compartment of the electrolyzer (E) and a pump (C) are provided, so that the potassium hydroxide solution enriched with carbon dioxide can be pumped by the pump (C) into the cathode compartment of the electrolyzer.

8. System according to one of the two preceding claims, characterized by the fact that a line (7) is provided which is connected to the cathode compartment of the electrolyzer (E) and the container (D) in such a way that a gas mixture can be directed from the cathode compartment of the electrolyzer (E) into the container (D).

9. System according to one of the three preceding claims, characterized by the fact thata line (8) is provided which is connected to the container (D) and a component (F) through which carbon dioxide can be separated from carbon monoxide and hydrogen by means of a membrane, so that a gas mixture can be introduced from the container (D) into the component (F).

10. System according to the preceding claim, characterized by the fact that a line (10) and a compressor (A) are connected to the component (F), through which carbon dioxide can be separated from carbon monoxide and hydrogen by means of a membrane, and to the component (H) which has the detector, so that a gas mixture containing carbon monoxide and hydrogen can be directed from the component (F), through which carbon dioxide can be separated from carbon monoxide and hydrogen by means of a membrane, to the detector.

11. System according to any of the preceding claims directed to a system, characterized by the fact thatthe component (H) having the detector includes an electronic mixing valve, and lines (11, 12) connected to the component (H) having the detector are provided through which a gas mixture from the component (H) having the detector can be selectively directed out of the system or to a component (G) of the system, through which carbon monoxide can be separated from hydrogen by means of a membrane.

12. System according to the preceding claim, characterized by the fact thata line (13) and a line (17) are connected to the component (G) through which carbon monoxide can be separated from hydrogen using a membrane, which are arranged so that carbon monoxide from this component (G) can be discharged from the system via the line (17), and hydrogen from this component (G) can be selectively discharged into the anode compartment of the electrolyzer (E) and out of the system using further lines (14, 15, 16) and a compressor (A).

13. System according to the preceding claim, characterized by the fact that a tank (K) is present which is connected to the line (14) in such a way that hydrogen from the component (G), through which carbon monoxide can be separated from hydrogen by means of a membrane, can be fed into the tank (K).

14. System according to the preceding claim, characterized by the fact that one or more pressure regulators (J) are present, with which a pressure in the tank (K) can be regulated.

15. System according to any of the preceding claims directed to a system, characterized by the fact that a PFSA column (I) is present for the extraction of traces of carbon monoxide, from which hydrogen can be introduced into the anode compartment of the electrolyzer.

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