Experimental Study on the Absorption of CO_2 from Flue Gas by Aqueous Solutions of Methyldiethanolamine + Potassium Glycinate in Hollow Fiber Membrane Contactor

摘要

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.