Abstract: An electrolysis system and an electrolysis method wherein the electrolysis system includes a pressure-electrolytic cell and a throttle in the catholyte line, by which the catholyte flow can be divided into a gas and liquid phase. In this way, (by-)products of the electrolysis can be recycled, while the electrolytic cell can be operated effectively at a high pressure.

Abstract: Various embodiments may include an electrolyzer for electrochemical utilization of carbon dioxide comprising: electrolysis cell defining an anode space and a cathode space; an anode in the anode space; a cathode in the cathode space; a first cation-permeable membrane disposed between the anode space and the cathode space; and a second anion-selective membrane disposed between the first cation-permeable membrane and the cathode. The anode directly adjoins the first cation-permeable membrane. The second anion-selective membrane directly adjoins the first cation-permeable membrane and the second anion-selective membrane directly adjoins the cathode.

Abstract: Various embodiments include a method for electrochemical utilization of carbon dioxide comprising: reducing carbon dioxide to a product gas in an electrolysis cell of an electrolyzer; delivering the product gas comprising carbon dioxide into a gas scrubbing apparatus; scrubbing the product gas to remove carbon dioxide using an absorbent in the gas scrubbing apparatus; regenerating the absorbent in an electrodialysis cell of an electrodialysis unit; at least partly recycling the regenerated absorbent into the gas scrubbing apparatus; and at least partly recycling the carbon dioxide released during the regenerating as reactant gas into the electrolyzer.

Abstract: A device for the electrochemical production of a product containing CO, and a method for the electrochemical production of a product containing CO, in which a return of a material stream containing the educt and CO is carried out after the electrochemical production.

Abstract: A device for the electrochemical production of a product containing CO, and a method for the electrochemical production of a product containing CO, in which a return of a material stream containing the educt and CO is carried out after the electrochemical production.

Abstract: An electrolysis system and an electrolysis method wherein the electrolysis system includes a pressure-electrolytic cell and a throttle in the catholyte line, by which the catholyte flow can be divided into a gas and liquid phase. In this way, (by-)products of the electrolysis can be recycled, while the electrolytic cell can be operated effectively at a high pressure.

Abstract: A method for the electrochemical production of a gas including CO, in particular CO or syngas, from CO2, wherein the electrochemical production of the gas including CO, in particular CO or syngas, from CO2 takes place in multiple electrolytic cells, which are arranged in series one behind the other in the direction of at least one electrolyte flow and each include a cathode and an anode, wherein the at least one electrolyte flow is conducted through the electrolytic cells which are arranged in series one behind the other and is intermediately cooled between at least two electrolytic cells which are arranged in series one behind the other. A device is adapted for carrying out the method.

Abstract: A method for cooling a fluid from an electrolysis unit and extracting water from ambient air comprising: conducting moist air having a first molar amount of water and raw water into an evaporator unit in a counterflow at a temperature at or below the boiling temperature of the water; evaporating pure water from the raw water into the moist air and cooling the raw water; conducting the cooled raw water into a heat exchanger thereby cooling the fluid stream of the electrolysis unit; conducting the moist air and the pure water into a water extraction unit; separating a second molar amount of the pure water off from the moist air in the water extraction unit, wherein a third molar amount of water remaining in the air is less than the first; conducting the preheated raw water back to the evaporator; and conducting the cooled fluid back into the electrolysis unit.

Abstract: Various embodiments may include an electrolyzer for electrochemical utilization of carbon dioxide comprising: electrolysis cell defining an anode space and a cathode space; an anode in the anode space; a cathode in the cathode space; a first cation-permeable membrane disposed between the anode space and the cathode space; and a second anion-selective membrane disposed between the first cation-permeable membrane and the cathode. The anode directly adjoins the first cation-permeable membrane. The second anion-selective membrane directly adjoins the first cation-permeable membrane and the second anion-selective membrane directly adjoins the cathode.

Abstract: Various embodiments may include an electrolyzer for electrochemical utilization of carbon dioxide comprising: an electrolysis cell defining an anode space and a cathode space; an anode; a cathode; a first cation-permeable membrane disposed between the anode space and the cathode space; and a layer comprising an anion-selective polymer disposed between the first membrane and the cathode. The anode directly adjoins the first cation-permeable membrane and the layer covers at least part of the cathode but not all of the cathode.

Abstract: Various embodiments may include a method of electrochemical production of synthesis gas comprising: reducing carbon dioxide to a first product gas including carbon monoxide in a carbon dioxide electrolysis cell; splitting water to generate a second product gas including hydrogen in a water electrolysis cell; delivering at least one catholyte from the group consisting of: a first catholyte from the carbon dioxide electrolysis cell and a second catholyte from the water electrolysis cell, into a gas scrubbing apparatus; and removing non-reduced carbon dioxide from the first product gas in the gas scrubbing apparatus using the at least one catholyte as an absorbent.

Abstract: An electrolyser arrangement with at least one electrolytic cell, having two electrodes, namely an anode and a cathode, each of the two electrodes being in contact with an electrode compartment for filling with a liquid electrolyte, the two electrode compartments being separated by a membrane and a conveying device being provided, one for each of the two electrodes, for conveying the electrolyte in each case in a circuit, a cathode circuit and an anode circuit, through the electrode compartment via at least one collection vessel per circuit and back into the electrode chamber. A device is provided outside the electrolytic cell, for conveying an auxiliary volume flow between the cathode circuit and the anode circuit.

Abstract: Various embodiments include a CO2 electrolyzer comprising: a gas space adjoining a cathode comprising a gas diffusion electrode adjoining a cathode space; an anode in an anode space; a membrane separating the cathode space from the anode space; a feed apparatus feeding reactant gas into the gas space; a mixing vessel for at least partial joint accommodation of the anolyte and the catholyte; and a connection line between the gas separating region and the gas space. The mixing vessel includes a gas separating region closed off with respect to a surrounding atmosphere. The cathode space accommodates a catholyte and the anode space accommodates an anolyte.

Abstract: The present disclosure relates to membranes for use in electrolysis systems. The teachings thereof may be embodied in a method for checking a membrane of an electrolyzer comprises two volumes separated by the membrane and produces two product gases from a starting liquid. The method may include: detecting an electrolysis current strength during electrolysis, measuring a liquid flow rate of the starting liquid between the two electrolyzer volumes, calculating a ratio of the measured liquid flow rate and the detected electrolysis current strength, and using the calculated ratio as an indication of membrane leaktightness.

Abstract: Various embodiments include a method for producing hydrocarbons, the method comprising: producing carbon monoxide and carbon dioxide with addition of oxygen in a first reaction unit; fermenting the carbon monoxide, the carbon dioxide, and hydrogen in a second reaction unit; adding biogas provided from a biogas system and oxygen from an electrolyzer as reactants to the first reaction unit; and adding hydrogen from the electrolyzer as a reactant to the second reaction unit.

Abstract: A method for cooling a fluid from an electrolysis unit and extracting water from ambient air comprising: conducting moist air having a first molar amount of water and raw water into an evaporator unit in a counterflow at a temperature at or below the boiling temperature of the water; evaporating pure water from the raw water into the moist air and cooling the raw water; conducting the cooled raw water into a heat exchanger thereby cooling the fluid stream of the electrolysis unit; conducting the moist air and the pure water into a water extraction unit; separating a second molar amount of the pure water off from the moist air in the water extraction unit, wherein a third molar amount of water remaining in the air is less than the first; conducting the preheated raw water back to the evaporator; and conducting the cooled fluid back into the electrolysis unit.

Abstract: Various embodiments may include a method of electrochemical production of synthesis gas comprising: reducing carbon dioxide to a first product gas including carbon monoxide in a carbon dioxide electrolysis cell; splitting water to generate a second product gas including hydrogen in a water electrolysis cell; delivering at least one catholyte from the group consisting of: a first catholyte from the carbon dioxide electrolysis cell and a second catholyte from the water electrolysis cell, into a gas scrubbing apparatus; and removing non-reduced carbon dioxide from the first product gas in the gas scrubbing apparatus using the at least one catholyte as an absorbent.

Abstract: Some embodiments include a method of electrochemical utilization of carbon dioxide including: delivering an electrolyte into a first cathode subspace of a carbon dioxide electrolysis cell including a first cathode arranged therein such that it defines a first cathode subspace and a second cathode subspace; delivering carbon dioxide into the second cathode subspace; reducing the carbon dioxide to a product gas; removing the catholyte from the first cathode subspace and the product gas out of the second cathode subspace separately from one another; combining the product gas and the catholyte downstream of the carbon dioxide electrolysis; and separating non-reduced carbon dioxide from the product gas with the catholyte acting as an absorbent. The electrolyte comprises a catholyte.

Abstract: Various embodiments may include a method comprising: reducing carbon dioxide to a product gas comprising carbon monoxide in a electrolysis cell; separating the product gas from the catholyte in a first separation apparatus; separating off excess water in the catholyte enriched with water from the anolyte during the reduction of carbon dioxide with a stripping gas in a second separation apparatus; separating the water from the stripping gas in a third separation apparatus; and recycling the water from the third separation apparatus into the anode space.

Abstract: A power plant system is provided having a high temperature battery, supplied with fluid via at least one supply line, for storing and releasing electrical energy, a gas turbine for generating electrical energy, and a heat exchanger which is designed to extract thermal energy from the exhaust stream of the gas turbine and transfer said thermal energy to the fluid, which fluid can be supplied after heat transfer to the high temperature battery via the at least one supply line.