US 12,246,993 B2
Methods and systems for biomass-derived CO2 sequestration in concretes and aggregates
Iman Mehdipour, Los Angeles, CA (US)
Assigned to CarbonBuilt, El Segundo, CA (US)
Filed by CarbonBuilt, El Segundo, CA (US)
Filed on Feb. 21, 2023, as Appl. No. 18/172,087.
Claims priority of provisional application 63/312,380, filed on Feb. 21, 2022.
Prior Publication US 2023/0265019 A1, Aug. 24, 2023
Int. Cl. C04B 40/02 (2006.01); C04B 14/28 (2006.01); F23K 1/00 (2006.01); B01D 47/00 (2006.01); B01D 53/26 (2006.01); C04B 111/00 (2006.01); F23J 15/02 (2006.01)
CPC C04B 40/0236 (2013.01) [C04B 14/28 (2013.01); F23K 1/00 (2013.01); B01D 47/00 (2013.01); B01D 53/265 (2013.01); C04B 2111/00017 (2013.01); F23J 15/02 (2013.01); F23K 2201/20 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A process for sequestering carbon dioxide from a biomass combustion apparatus in carbonated concrete, comprising
providing a CO2-containing flue gas from a biomass combustion apparatus having a biomass discharge outlet;
conditioning the CO2-containing flue gas to provide a conditioned gas by:
removing particulate matter; and
adjusting the temperature, flow rate, or a combination thereof, of the CO2-containing flue gas;
wherein the conditioned gas has a different temperature, flow rate, or a combination thereof, than the CO2-containing flue gas at the biomass discharge outlet; and
wherein the conditioned gas has the same concentration of CO2 as the CO2-containing flue gas at the biomass discharge outlet;
wherein the concentration of CO2 in the CO2-containing flue gas is less than 20% by volume;
contacting, in a carbonation chamber, the conditioned gas with at least one block of concrete or concrete precursor until the at least one block of concrete or concrete precursor is carbonated 1.45 weight % to 2.2 weight % CO2 by total solid mass; and
making calcium carbonate in carbonated concrete that has a compressive strength of at least 1,600 pounds-per-square inch (PSI) at ambient pressure and temperatures ranging from, and including, 20° C. to 100° C.;
wherein the process comprises recirculating the conditioned gas out of and back into the carbonation chamber;
wherein the carbonation chamber is a flow-through reactor.