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US 10,865,486 B2Granted
Electrolysis method and electrolysis system comprising recirculating flushing media
AssigneeSunFire GmbH
InventorsChristian von Olshausen, Joerg Brabandt, Dirk Schaarmann
Life of this patent
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Abstract
An electrolysis method comprising an electrolysis cell (4), which method uses at least one recirculating flushing medium (50, 60). The invention further relates to an electrolysis system, in particular for carrying out the electrolysis method.
Claims18
An electrolysis method with an electrolysis cell (4), operated within a temperature range of 300° C. to 1500° C., comprising the steps of:
- supplying a reactant (30) to the electrolysis cell (4), wherein a product gas including hydrogen and carbon monoxide (H2, CO) is formed at the cathode (43) of the electrolysis cell (4) and oxygen (O2) is formed at the anode (45) of the electrolysis cell (4),
- at least partially transporting away the oxygen (O2) by means of at least one first flushing medium (60) supplied continuously to the electrolysis cell (4), wherein the first flushing medium (60) is inert to oxygen (O2)
- at least partially separating the first flushing medium/oxygen mixture (60—O2) in a separating device (12) into the constituents oxygen (O2) and the at least first flushing medium (60),
- recirculating by reintroducing the separated at least first flushing medium (60) into the electrolysis cell (4) and discharging the separated oxygen (O2),
- wherein the electrolysis cell (4) is a solid oxide electrolyte cell (SOEC), a solid oxide cell (SOC), or a reversible solid oxide cell (rSOC),
- wherein, for flushing, as the at least first flushing medium (60), an inert gas or a noble gas, at the working temperature and working pressure of the electrolysis, is used, and wherein this is passed through a closed anode flushing circuit, and
- wherein the at least partial separation of the oxygen (O2) from the first flushing medium is accomplished with at least one of a separation membrane, a porous separation structure, a sorbent, a pressure change adsorption assembly and a temperature change adsorption assembly.
4 more elements
An electrolysis method with an electrolysis cell (4), operated within a temperature range of 300° C. to 1500° C. comprising the steps of:
- supplying a reactant (30), wherein water (H2O) and carbon dioxide (CO2) are used as the reactant (30) in the form of a gas, steam and/or gaseous vapour, to the electrolysis cell (4), wherein product gasses (H2, CO) formed are hydrogen (H2) and carbon monoxide (CO) at the cathode (43) of the electrolysis cell (4) and oxygen (O7) is formed at the anode (45) of the electrolysis cell (4),
- at least partially transporting away the oxygen (O7) by means of at least one first flushing medium (60) supplied continuously to the electrolysis cell (4), wherein the first flushing medium (60) is inert to oxygen (O2)
- at least partially separating the first flushing medium/oxygen mixture (60—O2) in a separating device (12) into the constituents oxygen (O7) and the at least first flushing medium (60),
- recirculating by reintroducing the separated at least first flushing medium (60) into the electrolysis cell (4) and discharging the separated oxygen (O2),
- wherein the electrolysis cell (4) is a solid oxide electrolyte cell (SOEC), a solid oxide cell (SOC), or a reversible solid oxide cell (rSOC),
- wherein, for flushing, as the at least first flushing medium (60), an inert gas or a noble gas, at the working temperature and working pressure of the electrolysis, is used, and wherein this is passed through a closed anode flushing circuit, and
- wherein the at least partial separation of the oxygen (O2) from the first flushing medium is accomplished with at least one of a separation membrane, a porous separation structure, a sorbent a pressure change adsorption assembly and a temperature change adsorption assembly.
4 more elements
Dependencies are inferred from the claim text.