US 12,083,478 B2
System and method for production of synthetic fuel through CO2 capture and water splitting
Klaus Lackner, Paradise Valley, AZ (US)
Assigned to Arizona Board of Regents on Behalf of Arizona State University, Scottsdale, AZ (US)
Appl. No. 17/428,965
Filed by ARIZONA BOARD OF REGENTS ON BEHALF OF ARIZONA STATE UNIVERSITY, Scottsdale, AZ (US)
PCT Filed Feb. 5, 2020, PCT No. PCT/US2020/016864
§ 371(c)(1), (2) Date Aug. 5, 2021,
PCT Pub. No. WO2020/163513, PCT Pub. Date Aug. 13, 2020.
Claims priority of provisional application 62/801,356, filed on Feb. 5, 2019.
Prior Publication US 2022/0118406 A1, Apr. 21, 2022
Int. Cl. B01D 53/96 (2006.01); B01D 53/62 (2006.01); B01D 53/78 (2006.01); C25B 1/04 (2021.01); C25B 1/50 (2021.01); C25B 9/19 (2021.01); C25B 15/08 (2006.01)
CPC B01D 53/965 (2013.01) [B01D 53/62 (2013.01); B01D 53/78 (2013.01); C25B 1/04 (2013.01); C25B 1/50 (2021.01); C25B 9/19 (2021.01); C25B 15/087 (2021.01); B01D 2251/304 (2013.01); B01D 2251/306 (2013.01); B01D 2251/606 (2013.01); B01D 2257/504 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A system for producing gas streams for use in synthetic fuel production through CO2 capture and water splitting, comprising:
a CO2 capture device configured to receive a CO2-containing stream and comprising an aqueous alkaline solution, the aqueous alkaline solution comprising hydroxide ions and/or carbonate ions, the CO2 capture device generating a carbon-rich solution when the aqueous alkaline solution absorbs CO2 received from the CO2-containing stream, the carbon-rich solution including carbonate ions and/or bicarbonate ions;
an electrolyzer fluidically coupled to the CO2 capture device, the electrolyzer defining a volume including an anode region having an anode, a cathode region having a cathode, and a neutral region between the cathode region and the anode region, the volume comprising an electrolyte solution having a pH gradient generated by the application of an electric current between the anode and the cathode, causing the electrolyte solution in the anode region to be acidic and the electrolyte solution in the cathode region to be alkaline; and
a conduit placing the CO2 capture device in fluid communication with the volume of the electrolyzer through a distributor disposed between the anode region and the neutral region, the distributor having a plurality of holes facing toward the neutral region and away from the anode region,
wherein the carbon-rich solution is received into the volume of the electrolyzer; and
wherein the electrolyzer generates a hydrogen product stream, an oxygen product stream, and a CO2 product stream.