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

作者：Choi Won Joon; Seo Jong Beom; Cho Sang Won; Park Sang Wook; Oh Kwang Joong^*

来源：Korean Journal of Chemical Engineering, 2009, 26(3): 705-710.

DOI：10.1007/s11814-009-0118-6

• Carbon Dioxide
• Sulfur Dioxide
• Simultaneous Absorption
• 2-Amino-2-methyl-1-propanol
• Ammonia

To enhance the absorption rate for CO2 and SO2, aqueous ammonia (NH3) 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+ NH3 for CO2 and SO2 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 CO2 and SO2. As a result, the addition of NH3 solution into aqueous AMP solution increased the reaction rate constants of CO2 and SO2 by 144 and 109%, respectively, compared to that of AMP solution alone. The simultaneous absorption rate of CO2/SO2 on the addition of 1 wt% NH3 into 10 wt% AMP at a p (A1) of 15 kPa and p (A2) of 1 kPa was 5.50x10(-6) kmol m(-2) s(-1), with an increase of 15.5% compared to 10 wt% AMP alone. Consequently, the addition of NH3 solution into an aqueous AMP solution would be expected to be an excellent absorbent for the simultaneous removal of CO2/SO2 from the composition of flue gas emitted from thermoelectric power plants.

• 出版日期2009-5