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Titel:
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Performance of ceramic membranes at elevated pressure and temperature: effect of non-ideal flow conditions in a pilot scale membrane separator
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Auteur(s):
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Gepubliceerd door:
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Publicatie datum:
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ECN
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1-11-1998
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ECN publicatienummer:
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Publicatie type:
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ECN-RX--98-061
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Artikel wetenschap tijdschrift
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Aantal pagina's:
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22
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Gepubliceerd in: Journal of Membrane Science (Elsevier), , 1999, Vol.155, p.241-259.
Samenvatting:
Microporous silica membrane manufacturing technology has been scaled-upand tubes with several hundred cm2 of membrane surface area have been
prepared. Practical problems in applying high-temperature ceramic membrane
technology, such as sealing and ceramic metal joining, have been solved
successfully on pilot scale. Experiments show that membranes developed are
capable of selectively separating hydrogen from a gas mixture containing
hydrogen at elevated pressures and temperatures. Permselectivity values for
H2/CH4 separation are as high as 28. The gas separation performance of
membranes is influenced by the flow conditions at both the feed and permeate
side of the membrane separators. By performing high-temperature high-pressure
separation experiments and simulation of the non-ideal flow effects around
the membrane, the influence of the flow effects is predicted. The operation
of the pilot scale membrane separator is simulated by a two-dimensional,
one-phase mathematical model which predicts the basic features of the
separator from an engineering point of view. A comparison between the
experimental data and the modelling results yields the conclusion that the
dispersion model predicts much better the membrane separator performance than
the simplified model which assumes plug flow on both sides of the membrane
separator. 29 refs.
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