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Mixed‐Matrix Membrane for Gas Separation: Polydimethylsiloxane Filled with Zeolite
Author(s) -
Hussain M.,
König A.
Publication year - 2012
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201100419
Subject(s) - polydimethylsiloxane , membrane , chemical engineering , gas separation , zeolite , solubility , interphase , materials science , matrix (chemical analysis) , chromatography , polymer chemistry , chemistry , composite material , organic chemistry , catalysis , biochemistry , biology , engineering , genetics
Mixed‐matrix membranes (MMMs) comprised of polydimethylsiloxane (PDMS) as continuous and zeolite (ZSM‐5) as dispersed phase have been prepared to investigate CO 2 separation from gas mixtures, focusing on the high solubility of CO 2 in ZSM‐5/PDMS MMMs for separating CO 2 ‐N 2 mixtures. ZSM‐5 incorporation in PDMS significantly increases the permeability of single gases and a similar effect is observed for gas mixtures. Membrane performance is evaluated using the Maxwell model; an interphase gap between the filler and the polymeric phase is identified. A modified Maxwell model is applied to account for this additional transport through the membrane.