US 12,030,016 B2
Systems and methods for direct air carbon dioxide capture
Ethan Cohen-Cole, Berkeley, CA (US); Rahul Surana, Fremont, CA (US); Luke Shors, Rotorua (NZ); and Zeph Landau, Berkeley, CA (US)
Assigned to Capture6 Corp, Berkeley, CA (US)
Filed by Capture6 Corp., Berkeley, CA (US)
Filed on Dec. 16, 2022, as Appl. No. 18/082,903.
Claims priority of provisional application 63/290,467, filed on Dec. 16, 2021.
Claims priority of provisional application 63/341,883, filed on May 13, 2022.
Claims priority of provisional application 63/355,368, filed on Jun. 24, 2022.
Claims priority of provisional application 63/389,095, filed on Jul. 14, 2022.
Claims priority of provisional application 63/413,021, filed on Oct. 4, 2022.
Prior Publication US 2023/0191322 A1, Jun. 22, 2023
Int. Cl. C01B 32/60 (2017.01); B01D 53/62 (2006.01); B01D 53/96 (2006.01); C22B 7/00 (2006.01)
CPC B01D 53/62 (2013.01) [B01D 53/965 (2013.01); C01B 32/60 (2017.08); C22B 7/00 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A method for capturing and sequestering carbon dioxide (CO2), comprising:
receiving an input liquid comprising at least one of seawater, brackish water, and brine effluent;
performing an electrochemical process on the input liquid to produce at least one hydroxide-rich stream;
capturing CO2 from air using the hydroxide-rich stream and a passive direct air capture system, thereby producing a liquid carbonate solution;
precipitating a solid carbonate and/or a slurry of carbonate from the liquid carbonate solution;
producing a hydrogen-rich stream at least in part with the electrochemical process;
dissolving a metal and/or a mineral into the hydrogen-rich stream to produce a metal and/or a mineral solution;
mixing the solid carbonate and/or the slurry of carbonate from the liquid carbonate solution with the metal and/or the mineral solution to produce a metal and/or a mineral carbonate mixture;
precipitating a metal and/or a mineral carbonate from the metal and/or the mineral carbonate mixture; and
recycling a salt solution from the metal and/or the mineral carbonate mixture by mixing the salt solution with the input liquid upstream from the electrochemical process.