US 11,654,393 B2
Temperature vacuum swing adsorption process suited for carbon capture to regenerate sorbents using the CO2 product gas as the heat transfer medium
Saeb Besarati, Los Angeles, CA (US); William T. Gross, Pasadena, CA (US); Brian J. Holman, Los Angeles, CA (US); Eric W. Colbert, Los Angeles, CA (US); and Dan Fang, Los Angeles, CA (US)
Assigned to CARBON CAPTURE INC., Los Angeles, CA (US)
Filed by CARBON CAPTURE, INC., Los Angeles, CA (US)
Filed on Aug. 29, 2022, as Appl. No. 17/823,024.
Claims priority of provisional application 63/238,190, filed on Aug. 29, 2021.
Prior Publication US 2023/0070112 A1, Mar. 9, 2023
Int. Cl. B01D 53/047 (2006.01); B01D 53/04 (2006.01); F24F 3/14 (2006.01); B01D 53/14 (2006.01); B01D 71/02 (2006.01); B01D 53/06 (2006.01)
CPC B01D 53/0476 (2013.01) [B01D 53/0462 (2013.01); B01D 53/06 (2013.01); B01D 53/1425 (2013.01); B01D 71/0281 (2022.08); F24F 3/1411 (2013.01); B01D 2253/108 (2013.01); B01D 2257/504 (2013.01); B01D 2258/06 (2013.01); B01D 2259/40007 (2013.01); F24F 2003/144 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of performing direct air capture (DAC) of carbon dioxide (CO2), the method comprising:
drawing an air stream through a dehumidifier to remove a portion of humidity from the air stream which results in a relatively dry air stream;
providing the relatively dry air stream through a reactor to remove the remaining humidity and the CO2 from the relatively dry air stream which results in a dry purified air stream;
applying a vacuum to the reactor to remove nitrogen from the reactor;
circulating a gas composition comprising at least about 25% by volume of CO2 through a loop comprising the reactor, a heater, a condenser, and a fan;
heating the gas composition with the heater to a desorption temperature sufficient to desorb CO2 and water from the reactor;
condensing and collecting the desorbed water as the gas composition circulates through the condenser which results in a dry CO2 product stream;
applying a vacuum to the loop to remove the dry CO2 product stream; and
collecting the dry CO2 product stream.