US 12,220,661 B1
Direct capture of carbon dioxide
Adam Goff, Durham, NC (US); Damian Beauchamp, Hillsborough, NC (US); Jeremy Eron Fetvedt, Raleigh, NC (US); Miles R. Palmer, Durham, NC (US); Xijia Lu, Durham, NC (US); and Daniel Rathbone, Durham, NC (US)
Assigned to 8 Rivers Capital, LLC, Durham, NC (US)
Filed by 8 Rivers Capital, LLC, Durham, NC (US)
Filed on Nov. 12, 2024, as Appl. No. 18/944,238.
Application 18/944,238 is a continuation of application No. 17/781,943, granted, now 12,172,127, previously published as PCT/IB2020/061455, filed on Dec. 3, 2020.
Claims priority of provisional application 62/942,902, filed on Dec. 3, 2019.
This patent is subject to a terminal disclaimer.
Int. Cl. B01D 53/82 (2006.01); B01D 53/62 (2006.01); B01D 53/96 (2006.01); B01J 20/04 (2006.01); B01J 20/28 (2006.01); B01J 20/32 (2006.01); B01J 20/34 (2006.01)
CPC B01D 53/82 (2013.01) [B01D 53/62 (2013.01); B01D 53/96 (2013.01); B01J 20/041 (2013.01); B01J 20/28033 (2013.01); B01J 20/3236 (2013.01); B01J 20/3297 (2013.01); B01J 20/3433 (2013.01); B01J 20/3483 (2013.01); B01D 2251/404 (2013.01); B01D 2251/604 (2013.01); B01D 2257/504 (2013.01); B01D 2258/06 (2013.01)] 21 Claims
 
1. A method for direct air capture of carbon dioxide, the method comprising:
applying a calcium sorbent material on a substrate to define a layer of the calcium sorbent material on a surface of the substrate at a density of about 0.1 kilograms per square meter to about 5 kilograms per square meter;
subjecting the substrate with the layer of the calcium sorbent material to contact with air including carbon dioxide for a time sufficient for the calcium sorbent to react with the carbon dioxide and thereby capture at least a portion of the carbon dioxide from the air and convert at least a portion of the calcium sorbent to a carbonated calcium;
removing at least a portion of the carbonated calcium from the substrate by subjecting the substrate to a force effective to cause at least a portion of the carbonated calcium to break and loosen from the substrate; and
processing the carbonated calcium such that the carbon dioxide captured from the air is ready for sequestration or other use.