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Preparation of Nanoporous Ceramic Membranes by Sol-gel Method and Characterization of Gas Permeation  

Lee, Yong-Taek (Green Energy Center, College of Environment and Applied chemistry Department of Chemical Engineering, Kyung Hee University)
Choi, Ga-Young (Green Energy Center, College of Environment and Applied chemistry Department of Chemical Engineering, Kyung Hee University)
Han, Hyuk-Hee (Green Energy Center, College of Environment and Applied chemistry Department of Chemical Engineering, Kyung Hee University)
Publication Information
Membrane Journal / v.18, no.2, 2008 , pp. 176-184 More about this Journal
Abstract
Nano-porous ceramic membranes was synthesized by the sol-gel method. Gas permeation of hydrogen and nitrogen was determined by single composition gas. Pore size $0.1{\mu}m$ and porosity 32% of flat type ${\alpha}-Al_2O_3$ substrate was manufactured. An intermediate ${\gamma}-Al_2O_3$ layer with pore size of 4 nm was formed by dip-coating. Polymeric silica sol was synthesized by acid catalyzed hydrolysis and condensation of tetra-ethyl-ortho-silicate. Supported membranes on alumina were prepared by dipping and calcining. He, $N_2$ permeation experiments with nanoporous sol-gel modified supported ceramic membranes were peformed to determine the gas transport characteristics. $He/N_2$ permselectivity around $100{\sim}160$ and helium permeation in the order of $10^{-7}mol/m^2{\cdot}s{\cdot}Pa$ were measured in the temperature range of $303{\sim}363K$.
Keywords
sol-gel; ceramic membrane; silica membrane; gas permeation;
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