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Summary: Apparatus for measuring physical adsorption on intact supported
porous membranes
Karl D. Hammond Æ Geoffrey A. Tompsett Æ
Scott M. Auerbach Æ W. Curtis Conner
Received: 22 May 2006 / Revised: 5 October 2006
Ó Springer Science+Business Media, LLC 2007
Abstract We present a non-destructive, reusable
apparatus with which to measure physical adsorption
isotherms of intact porous membranes. We developed
a two-piece sample container to make reliable sorp-
tion measurements of porous membranes, the prop-
erties of which may differ from those of powders due
to crystal intergrowth. This novel system employs a
resealable container that can be immersed in a cryo-
genic bath, into which tubular, planar, or other porous
membranes and films may be placed. Detailed sorp-
tion isotherms, including high-resolution adsorption in
the low pressure (micropore-filling) region, are shown
for MFI-type zeolite membranes grown on two types
and configurations of a-alumina support.
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