	US 12,351,527 B2
	Integration of direct air capture system into CO₂mineralization process of concretes and aggregates
Gaurav Sant, Los Angeles, CA (US); Dante Simonetti, Los Angeles, CA (US); Iman Mehdipour, Los Angeles, CA (US); David Jassby, Los Angeles, CA (US); and Yenwen Tseng, Los Angeles, CA (US)
Assigned to The Regents of the University of California, Oakland, CA (US); and CarbonBuilt, Manhattan Beach, CA (US)
Filed by The Regents of the University of California, Oakland, CA (US); and CarbonBuilt, Manhattan Beach, CA (US)
Filed on Oct. 18, 2022, as Appl. No. 18/047,633.
Claims priority of provisional application 63/256,856, filed on Oct. 18, 2021.
Prior Publication US 2023/0120088 A1, Apr. 20, 2023
Int. Cl. C04B 40/02 (2006.01); C04B 40/00 (2006.01); B01D 53/14 (2006.01); C04B 111/00 (2006.01)

CPC C04B 40/0231 (2013.01) [C04B 40/0007 (2013.01); B01D 53/1475 (2013.01); C04B 2111/00017 (2013.01)]

16 Claims

1. A method of forming a concrete product, the method comprising:

capturing CO₂from a gas source, the capturing comprising:

contacting the gas source with an absorption solution having a solvent and a solute, wherein the solvent and/or the solute are capable of reacting with CO₂to form an anionic compound;

adjusting the pH of the absorption solution electrochemically to less than about 7 to release the CO₂as a concentrated vapor containing CO₂;

collecting the concentrated vapor containing CO₂;

regenerating the solvent and/or the solute; and

flowing the concentrated vapor containing CO₂through a gas processing unit to adjust at least one of a temperature, a relative humidity, or a flow rate of the concentrated vapor containing CO₂; and

contacting the concentrated vapor containing CO₂with a concrete component.