| Poly(vinylalcohol)-Tetraethoxysilane based NaA Zeolite
Composite Membrane by Primary Growth Technique: Gas
Permeation and Water-Ethanol Pervaporation Study |
Somjyoti Basak, Debtosh Kundu and Milan Kanti Naskar*
Pages : 113-117
DOI : 10.1080/0371750X.2017.1281764 |
| Abstract |
| Poly(vinylalcohol)-tetraethoxysilane based NaA zeolite composite membranes were
prepared onto the inner side of porous alumina support tube via primary crystallization
processes at 100oC for 4 h. Crystallization behaviour of the prepared NaA zeolite
membranes was confirmed by XRD and FTIR studies. FESEM analysis revealed dense
microstructure of the membrane with thickness of 15-20 m. Single gas permeation of
He, N2 and CO2 was measured with NaA zeolite membrane. Maximum permselectivity
values of He/N2 and He/CO2 were found to be 43.55 and 46.27, respectively.
Pervaporation behaviour for the separation of ethanol/water mixture was studied with
the membrane. Starting with 90% ethanol, 95.2% ethanol concentration was achieved
within 600 min of pervaporation experiment.
[Keywords: Sol-gel processes, Membrane, Microstructure, NaA zeolite] |
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