ZSM-5 and Fe-ZSM-5 membranes were synthesized on α-Al2O3 by secondary growth. The organic templates were removed at 450℃ in the flowing air environment. After ZSM-5 and Fe-ZSM-5 membranes were treated with NaOH or NaCO3 solution
the hydrophilicity of the membrane surface could be enhanced
leading to improved permeation flux and separation factor in prevoporation of aqueous ethanol solution. After treated by NaOH for 2 h
the permeation flux of Fe-ZSM-5 membrane could reach to 2.01 kg·m-2·h-1 with the separation factor of 21.0.