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Separation Science and Technology, Vol.49, No.6, 797-802, 2014
Improvement of Zeolite T Membrane via Clear Solution Gel in Dehydration of Methanol, Ethanol, and 2-Propanol
Using of clear gel solution on synthesis of zeolite membrane can potentially have many benefits. In this research, zeolite T membrane on home-made alpha-Alumina disc-shaped MF support was successfully synthesized in 120 degrees C for 24 h via secondary growth hydrothermal method using high alkalinity clear gel solution in molar ratio formulation (SiO2:Al2O3:Na2O:K2O:H2O = 55:1:122.7:42.3:2000). The synthesized membrane showed elevated selectivity in dehydration of ethanol/water and 2-propanol/water solutions (between 1000 to more than 10000) and high-water permeation fluxes (between 1.2 to 2.4 kg/m(2)h at 40 degrees C for 10 wt.% water content). The synthesized MF alumina supports, zeolite T membranes, and crystals used for seeding were characterized by XRD and SEM analyses. These analyses indicated 10 mu m dense and defect-free well-intergrowth zeolite T as active layers were formed on the porous media support.