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Synthesis and Characterization of Nano‐Composite Alumina–Titania Ceramic Membrane for Gas Separation
Author(s) -
Ahmad A.L.,
Othman M.R.,
Idrus N.F.
Publication year - 2006
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2006.01183.x
Subject(s) - materials science , polyvinyl alcohol , porosity , membrane , sintering , ceramic membrane , ceramic , composite number , chemical engineering , composite material , permeability (electromagnetism) , sol gel , viscosity , chemistry , nanotechnology , biochemistry , engineering
A ceramic composite membrane was prepared using a commercial titania ceramic membrane coated by alumina oxide via a sol–gel technique where polyvinyl alcohol (PVA) was used as a binder. The characteristic of the membrane was analyzed in terms of the effect of PVA concentration and sintering temperature on viscosity, pore size, density, porosity and surface area of the membrane. Two vol% of PVA solution containing 4 g of PVA in 100 mL of water was adequate to achieve an appropriate porosity level to avoid cracks on the gel layer. Sol viscosity and pore size of the membrane essentially increased when the PVA concentration was increased. The density of the membrane increased as the sintering temperature increased. The porosity level however, decreased when the temperature was increased. The composite membrane was further characterized in terms of permeability of pure gas at low‐temperature region (301 K) where an experimental platform has been developed to perform the permeability studies.