	US 12,421,612 B2
	Electrolysis of carbon dioxide to solid carbon using a liquid metal cathode
Ali Zavabeti, West Perth WA (AU); Gang Li, West Perth WA (AU); Robin John Batterham, West Perth WA (AU); Rodney James Dry, West Perth WA (AU); and Michael John Dry, West Perth WA (AU)
Assigned to Carbelec Pty Ltd, West Perth WA (AU)
Appl. No. 18/266,449
Filed by Carbelec Pty Ltd, West Perth WA (AU)
PCT Filed Nov. 26, 2021, PCT No. PCT/AU2021/051416 § 371(c)(1), (2) Date Jun. 9, 2023, PCT Pub. No. WO2022/120411, PCT Pub. Date Jun. 16, 2022.
Claims priority of application No. 2020904569 (AU), filed on Dec. 9, 2020.
Prior Publication US 2024/0044018 A1, Feb. 8, 2024
Int. Cl. C25B 1/135 (2021.01); C21B 5/00 (2006.01); C25B 1/02 (2006.01); C25B 9/30 (2021.01); C25B 15/027 (2021.01); C25B 15/08 (2006.01)

CPC C25B 1/135 (2021.01) [C21B 5/007 (2013.01); C25B 1/02 (2013.01); C25B 9/30 (2021.01); C25B 15/027 (2021.01); C25B 15/081 (2021.01); C25B 15/083 (2021.01); C25B 15/087 (2021.01)]

18 Claims

1. A process for producing solid carbon and gaseous oxygen from CO₂via electrolysis using an electrolysis apparatus having a chamber with an electrolyte inlet, an electrolyte outlet, a pool of a liquid electrolyte containing CO₂in the chamber, at least one cathode-anode pair, with the cathode including a pool of a liquid metal capable of catalysing reduction of CO₂to solid carbon, and the liquid metal pool being in contact with the electrolyte pool, the process including supplying the electrolyte to the chamber via the inlet and discharging the electrolyte from the chamber via the outlet with the electrolyte flowing from the inlet to the outlet in fluid communication with the cathode-anode pair, applying a voltage between the cathode-anode pair and causing solid carbon to form on the cathode from CO₂in the electrolyte and gaseous oxygen to be evolved at the anode from CO₂in the electrolyte, and discharging solid carbon by transporting solid carbon from the cathode in the electrolyte to the electrolyte outlet and from the chamber via the outlet, and discharging gaseous oxygen from the chamber.