US 12,274,977 B1
Carbon dioxide removal systems using a geothermal heat source
Bart Ludo Scherpbier, San Francisco, CA (US); Cyndia Aiyun Cao, Oakland, CA (US); Mark Patrick Cyffka, El Cerrito, CA (US); Valerie Ann Wilson, Front Royal, VA (US); and Sudip Mukhopadhyay, Berkeley, CA (US)
Assigned to AirMyne, Inc., Berkeley, CA (US)
Filed by AirMyne, Inc., Berkeley, CA (US)
Filed on May 31, 2024, as Appl. No. 18/731,090.
Claims priority of provisional application 63/565,601, filed on Mar. 15, 2024.
Int. Cl. B01D 53/14 (2006.01); B01D 9/02 (2006.01); F24T 50/00 (2018.01)
CPC B01D 53/1475 (2013.01) [B01D 9/02 (2013.01); B01D 53/1425 (2013.01); F24T 50/00 (2018.05); B01D 2252/50 (2013.01); B01D 2257/504 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method to remove carbon dioxide (CO2) gas from a gaseous feed, the method comprising:
directing a gaseous feed to interact with an alkaline capture solution in a first gas-liquid contactor, thereby causing a first portion of CO2 from the gaseous feed to dissolve into the alkaline capture solution to form a CO2-rich alkaline capture solution, the alkaline capture solution comprising:
an aqueous ionic base,
a phase transfer catalyst,
an amine or a mixture of amines, and
a carboxylic acid salt of an amino acid or a mixture of carboxylic acid salts of amino acids;
generating steam using heat from a geothermal heat source;
using the steam to heat the CO2-rich alkaline capture solution in a second gas-liquid contactor, wherein a second portion of CO2 is separated from the CO2-rich alkaline capture solution in the second gas-liquid contactor to form a CO2-lean alkaline capture solution; and
directing the CO2-lean alkaline capture solution to the first gas-liquid contactor.