US 12,465,889 B2
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 Jan. 7, 2025, as Appl. No. 19/011,889.
Application 19/011,889 is a continuation of application No. 18/944,238, filed on Nov. 12, 2024, granted, now 12,220,661.
Application 18/944,238 is a continuation of application No. 17/781,943, granted, now 12,172,127, issued on Dec. 24, 2024, previously published as PCT/IB2020/061455, filed on Dec. 3, 2020.
Claims priority of provisional application 62/942,902, filed on Dec. 3, 2019.
Prior Publication US 2025/0144566 A1, May 8, 2025
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)] 30 Claims
OG exemplary drawing
 
1. A method for direct air capture (DAC) of carbon dioxide, the method comprising:
preparing a layer of a calcium sorbent material at a density of less than 10 kilograms per square meter on a substrate;
subjecting the substrate with the layer of the calcium sorbent material to contact with air including carbon dioxide within a storage unit or facility such that at least a portion of the carbon dioxide from the air converts at least a portion of the calcium sorbent to a carbonated form; and
controlling a carbonation condition within the storage unit or facility while the substrate with the layer of the calcium sorbent material contacts the air including carbon dioxide.
 
11. A method for direct air capture (DAC) of carbon dioxide, the method comprising:
applying a calcium sorbent material on a substrate to define a layer of the calcium sorbent material on 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 within a storage unit or facility such that at least a portion of the carbon dioxide from the air converts at least a portion of the calcium sorbent to a carbonated calcium; and
controlling a carbonation condition within the storage unit or facility while the substrate with the layer of the calcium sorbent material contacts the air including carbon dioxide.
 
21. A method for direct air capture (DAC) of carbon dioxide, the method comprising:
subjecting a layer of a calcium sorbent material to contact with air including carbon dioxide within a storage unit or facility such that at least a portion of calcium sorbent material undergoes carbonation by reacting with the carbon dioxide from the air and converts to a carbonated calcium, the layer of the calcium sorbent material being present on one or more substrates at a density of about 0.1 kilograms per square meter to about 5 kilograms per square meter; and
controlling the carbonation of the calcium sorbent material by controlling one or more properties of the air including carbon dioxide within the storage unit or facility.