Simultaneous absorption of CO2 and SO2 into aqueous AMP/NH3 solutions in binary composite absorption system

• Published in: The Korean journal of chemical engineering Vol. 26; no. 3; pp. 705 - 710
• Main Authors: Choi, Won-Joon, Seo, Jong-Beom, Cho, Sang-Won, Park, Sang-Wook, Oh, Kwang-Joong
• Format: Journal Article
• Language: English
• Published: Boston Springer US 01.05.2009; 한국화학공학회
• Subjects: Biotechnology; Catalysis; Chemistry; Chemistry and Materials Science; Environmental Engineering; Industrial Chemistry/Chemical Engineering; Materials Science; 화학공학; Ammonia; 2-Amino-2-methyl-1-propanol; Simultaneous Absorption; Sulfur Dioxide; Carbon Dioxide
• ISSN: 0256-1115; 1975-7220
• DOI: 10.1007/s11814-009-0118-6

To enhance the absorption rate for CO 2 and SO 2 , aqueous ammonia (NH 3 ) solution was added to an aqueous 2-amino-2-methyl-1-propanol (AMP) solution. The simultaneous absorption rates of AMP and a blend of AMP+ NH 3 for CO 2 and SO 2 were measured by using a stirred-cell reactor at 303 K. The process operating parameters of interest in this study were the solvent and concentration, and the partial pressures of CO 2 and SO 2 . As a result, the addition of NH 3 solution into aqueous AMP solution increased the reaction rate constants of CO 2 and SO 2 by 144 and 109%, respectively, compared to that of AMP solution alone. The simultaneous absorption rate of CO 2 /SO 2 on the addition of 1 wt% NH 3 into 10 wt% AMP at a p A 1 of 15 kPa and p A 2 of 1 kPa was 5.50×10 −6 kmol m −2 s −1 , with an increase of 15.5% compared to 10 wt% AMP alone. Consequently, the addition of NH 3 solution into an aqueous AMP solution would be expected to be an excellent absorbent for the simultaneous removal of CO 2 /SO 2 from the composition of flue gas emitted from thermoelectric power plants.