Dry Regenerable Sorbents 
Project No.: FC26-07NT43089

Schematic of RTI’s Dry Carbonate Process
 (click image to enlarge)

Research Triangle Institute (RTI) International completed two projects, NT43089 and NT40923, to investigate the use of sodium carbonate (Na2CO3 or soda ash) as an inexpensive, dry, and regenerable sorbent for carbon dioxide (CO2) capture in the Dry Carbonate Process. In this process, Na2CO3 reacts with CO2 and water to form sodium bicarbonate at the temperature of the flue gas exhaust; the sorbent is then regenerated at modest temperatures (~120°C) to yield a concentrated stream of CO2 for sequestration or other use. The regenerated sorbent is recycled to the absorption step for subsequent CO2 capture. See schematic of RTI’s Dry Carbonate Process.

Related Papers and Publications:


  • For further information on this project, contact the NETL Project Manager, José D. Figueroa.