Abstract
Abstract In this study, SO 2 absorption performance of the novel amino acid salt aqueous solutions such as sodium lysinate and sodium glycinate from simulated flue gas were studied and compared with frequently utilized absorbents including ethylenediamine, 2-amino2-methyl1-propanol (AMP) and disodium hydrogen phosphate. SO 2 -aqueous solution equilibrium data of these absorbents at concentration of 0.1 M in a stirred batch reactor exhibited that amino acid salt aqueous solutions and especially sodium lysinate had higher SO 2 solubility at 298 K. In order to ensure the SO 2 removal efficiency at practical condition, the suggested absorbents were applied in a packed column. The experimental results imply better removal efficiency of amino acid salt solutions consistent with absorption equilibrium data. The effects of parameters such as temperature, SO 2 inlet concentration and liquid–gas flow ratio on removal efficiency were investigated for 1 M concentration of sodium lysinate solution. SO 2 removal efficiency enhanced with increasing gas–liquid flow ratio, but both temperature and SO 2 inlet concentration had opposite effects.
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