Sorption isotherms of alcohols in zeolite-filled silicone rubber and in PVA-composite membranes

Results are reported of dynamic vapour-sorption experiments of various alcohols in a zeolite-filled silicone rubber membrane and in a poly(vinyl alcohol) (PVA)-composite membrane. In order to determine the influence of the filler on sorption behavior, sorption experiments also were performed with a...

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Bibliographic Details
Published in:Journal of membrane science 1992-05, Vol.70 (1), p.75-83
Main Authors: Bartels-Caspers, C., Tusel-Langer, E., Lichtenthaler, R.N.
Format: Article
Language:English
Subjects:
Chemistry
Colloidal state and disperse state
composite membranes
Exact sciences and technology
gas and vapour permeation
General and physical chemistry
Membranes
non-porous membranes
pervaporation
porous support
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Summary:Results are reported of dynamic vapour-sorption experiments of various alcohols in a zeolite-filled silicone rubber membrane and in a poly(vinyl alcohol) (PVA)-composite membrane. In order to determine the influence of the filler on sorption behavior, sorption experiments also were performed with a silicone rubber membrane without filler and with zeolite ZSM-5 as filler. The results show that adsorption by the zeolite contributes much more to the total sorption than the absorption by the silicone rubber. The PVA-composite membrane investigated consists of poly(vinyl alcohol) (PVA) and of polyacryl nitrile (PAN) as porous support. Vapour-sorption data of H 2O and alcohols in the PVA-composite membrane and in its PVA- and PAN-layers are presented and discussed in order to find out to which extent the sorption characteristics of the selective layer are affected by the support.
ISSN:0376-7388
1873-3123
DOI:10.1016/0376-7388(92)80081-T