Development of Hindered New Amine Absorbents for CO2 Capture

Aqueous solution containing sterically hindered amine represents candidate solvents having good potential for carbon dioxide (CO2) capture. In the present work, the CO2 reaction with amine-X having sterically hindered substituents in aqueous solution (absorbent-X) is investigated by laboratory scale apparatus. Absorbent-X was found to have the high CO2 cyclic capacity and the low CO2 release temperature. Furthermore, the CO2 regeneration energy of absorbent-X was 45% less than that of general 30 wt% MEA aqueous solution. We will evaluate the absorbent-X at Mikawa pilot plant (10 ton-CO2/day recovery) owned by Toshiba Corp. using the actual flue gas from Mikawa coal fired power plant in Fukuoka prefecture, Japan.