Effect of the liquid and gas velocities on the CO2 stripping from MEA solution through PEI hollow fiber membrane contactor

In this research, membrane contactor based CO2 stripping experiments were conducted using loaded CO2 monoethanolamine (MEA) solution as an absorbent while N2 gas was used as a stripping gas. Process asymmetric polyetherimide hollow fiber membranes using ethanol (2 wt%) as non-solvent additive in the polymer dope via phase inversion method were fabricated. Aqueous solution of 1-methyl-2-pyrrolidine (NMP) (90%) was applied as a bore fluid and water(10%) was used as the external coagulant. Gas permeation test was conducted using Nitrogen. Fabricated membranes were characterized in terms of pore size, critical water entry pressure and collapsing pressure. The performance of fabricated membranes for carbon dioxide stripping from monoethanolamine solution using a gas - liquid membrane contactor system was studied. The results showed that carbon dioxide stripping flux increased by increasing liquid velocity. Also, enhancement of stripping flux by increasing gas velocity was negligible

کلیدواژه ها:

Gas-liquid membrane contactor ، CO2 stripping ، Hollow fiber membrane ، Polyetherimide