Abstract
Absorption of carbon dioxide from flue gas was investigated in a hollow fiber membrane contactor using methyldiethanolamine + potassium glycinate (MDEA+PG) aqueous solutions. The experimental results showed that the CO 2 removal efficiency increased with the membrane contactor length increasing. CO 2 removal efficiency and the mass transfer rate of CO 2 increased with the increase of liquid flow rate. CO 2 removal efficiency decreased with gas flow rate increasing. CO 2 removal efficiency decreased and mass transfer rate increased with the CO 2 volume fraction inlet increasing. Comparing PG with monoethanolamin (MEA) as auxiliary absorbent, the hybrid solution of MDEA+PG was better than that of MDEA+MEA.
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