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In the present work, zeolite membranes were for the first time evaluated for separations at cryogenic temperatures. MFI membranes were evaluated with a feed of synthetic air, at varying feed pressures between 1 and 5bar and a sweep stream of helium at a constant pressure of 1bar for temperatures in the range 77–110K. When the feed pressure was 1bar, the highest O 2 /N 2 separation...
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