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US 12,692,605 B2Granted
Cell concept for using non-ionically conductive extraction media
AssigneeSiemens Energy Global GmbH & Co. KG
InventorsThomas Reichbauer, Günter Schmid, Yashar Musayev
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Abstract
A device for the electrolysis of CO2 and/or CO, with which an effective extraction of a cathode product can be ensured. The device includes a first gas feed, a first ion exchange membrane, an anode space including an anode, an extraction space, an extraction medium incorporated in the extraction space, a first feed for the extraction medium, and a first drain for the extraction medium. A method for carrying out an electrolysis of CO2 and/or CO, with which a corresponding extraction can be achieved with the device.
Claims20
An apparatus for electrolysis of CO2 and/or CO, comprising:
- a cathode space comprising a cathode gas space and a cathode, wherein the cathode is designed to convert CO2 and/or CO from the cathode gas space to at least one first cathode product, wherein the cathode preferably takes the form of a gas diffusion electrode;
- at least one first gas feed which is connected to the cathode gas space and is designed to supply the cathode gas space with a first gas stream comprising CO2 and/or CO;
- a first ion exchange membrane which contains an anion exchanger and adjoins the cathode space, wherein the cathode makes contact with the first ion exchange membrane;
- an anode space comprising an anode;
- an extraction space which is disposed between the first ion exchange membrane and the anode space, wherein the extraction space comprises a porous, ion-conducting solid-state electrolyte that makes at least partial contact with the first ion exchange membrane, wherein the first ion exchange membrane is configured to admit the at least one first cathode product at least partly into an adjacent extraction space and/or to convey it into the extraction space;
- wherein an extraction medium has been incorporated in the extraction space, wherein the extraction medium comprises water in an amount of 0% to 50% by weight and at least one organic solvent, wherein the extraction medium is designed to at least partly extract the at least one first cathode product and/or if appropriate at least one first product formed by reaction from the at least one first cathode product, and wherein the extraction medium is not an ion-conducting medium;
- at least one first feed for the extraction medium, which is designed to supply the extraction space with the extraction medium;
- and
- at least one first drain for the extraction medium, which is designed to drain off the extraction medium comprising at least to some degree the at least one first cathode product and/or if appropriate the at least one first product.
6 more elements
A method of electrolysis of CO2 and/or CO in an electrolysis cell comprising
- a cathode space comprising a cathode gas space and a cathode, wherein the cathode preferably takes the form of a gas diffusion electrode,
- a first ion exchange membrane which contains an anion exchanger and adjoins the cathode space, where the cathode makes contact with the first ion exchange membrane;
- an anode space comprising an anode;
- an extraction space which is disposed between the first ion exchange membrane and the anode space, wherein the extraction space comprises a porous, ion-conducting solid-state electrolyte that makes at least partial contact with the first ion exchange membrane and wherein an extraction medium has been incorporated in the extraction space, wherein the extraction medium comprises water in an amount of 0% to 50% by weight and at least one organic solvent, and wherein the extraction medium is not an ion-conducting medium,
- the method comprising:
- feeding the extraction medium through at least one first feed for the extraction medium into the extraction space;
- introducing a first gas stream comprising CO2 and/or CO into the cathode gas space in such a way that the CO2 and/or CO comes into contact with the cathode;
- converting CO2 and/or CO at the cathode to at least one first cathode product;
- admitting or transferring the at least one first cathode product to the extraction space;
- optionally converting the at least one first cathode product to at least one first product in the extraction space;
- at least partly extracting the at least one first cathode product and/or if appropriate the at least one first product into the extraction medium;
- and
- draining off the extraction medium comprising, at least to some degree, the at least one first cathode product and/or if appropriate the first product from the extraction space via at least one first drain for the extraction medium.
10 more elements
Dependencies are inferred from the claim text.