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Title:
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Dewatering of organics by pervaporation with silica membranes
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Author(s):
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Published by:
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Publication date:
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ECN
Energy Efficiency in Industry
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1-3-1999
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ECN report number:
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Document type:
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ECN-RX--99-010
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Article (scientific)
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Number of pages:
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16
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Published in: Paper presented at the 7th Aachener Membran Kolloquium, 9-11 March 1999, Aachen, Germany (), , , Vol., p.-.
Abstract:
A microporous silica membrane based on a tubular asymmetric ceramicsubstrate system has been developed and upscaled and has been used for
dewatering of organic solvents by means of pervaporation. The advantage of
this membrane over polymeric membranes is that it can be used under
aggressive environments and up to temperatures of 3000C. It has been shown
that for the dewatering of alcohols high waterfluxes, up to 5 kg/m2h, during
testing at 75C and 5 wt% water in the feed, are combined with process
selectivity over 1000. Under the same process conditions the inorganic
membranes need about 10 times less surface area than commercially available
polymeric membranes. The fluxes through the microporous silica membrane are
comparable to zeolite A membranes. Due to their much better stability in
acidic environments the silica membranes are, however, preferred. 2 refs.
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