Simultaneous Absorption of Carbon Dioxide and Sulfur Dioxide into Aqueous 2-Amino-2-Methy-1-Propanol

Abstract

Carbon dioxide and sulfur dioxide were simultaneously absorbed into aqueous 2-amino-2-methyl-1-propanol (AMP) in a stirred semi-batch tank with a planar gas-liquid interface within a range of 0–4.0 kmol/m³ of AMP, 0.03–0.3 mole fraction of CO₂, 0.005–2 mole fraction of SO₂, and 298–318 K. Absorption data of each gas in the CO₂-AMP and SO₂-AMP systems are obtained to verify their reaction regimes, based on film theory, respectively, which are used to analyze the simultaneous absorption mechanisms of CO₂ and SO₂ in the CO₂-SO₂-AMP systems. The measured absorption rates of CO₂ and SO₂ are compared to those formulated by an approximate solution of the mass balances with simultaneous reactions.

Keywords:

• 2-Amino-2-methyl-1-propanol
• carbon dioxide
• simultaneous absorption
• sulfur dioxide

ACKNOWLEDGMENTS

This work was supported by Brain Korea 21 Project and a grant (2006-C-CD-11-P-03-0-000-2007) from the Energy Technology R&D of Korea Energy Management Corporation. Dae-Won Park is also thankful for KOSEF (R01-2007-000-10183-0).