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Effect of Gas Adsorption on Acoustic Wave Propagation in MFI Zeolite Membrane Materials: Experiment and Molecular Simulation

TitleEffect of Gas Adsorption on Acoustic Wave Propagation in MFI Zeolite Membrane Materials: Experiment and Molecular Simulation
Publication TypeJournal Article
Year of Publication2014
AuthorsManga ED, Blasco H, Da-Costa J. P, Drobek M, Ayral A, Le Clezio E, Despaux G, Coasne BA, Julbe A
JournalLangmuir
Volume30
Issue34
Pagination10336-10343
Date PublishedAug-04-2014
Type of ArticleArticle
ISSN0743-7463
Abstract
Abstract Image

The present study reports on the development of a characterization method of porous membrane materials which consists of considering their acoustic properties upon gas adsorption. Using acoustic microscopy experiments and atomistic molecular simulations for helium adsorbed in a silicalite-1 zeolite membrane layer, we showed that acoustic wave propagation could be used, in principle, for controlling the membranes operando. Molecular simulations, which were found to fit experimental data, showed that the compressional modulus of the composite system consisting of silicalite-1 with adsorbed He increases linearly with the He adsorbed amount while its shear modulus remains constant in a large range of applied pressures. These results suggest that the longitudinal and Rayleigh wave velocities (VL and VR) depend on the He adsorbed amount whereas the transverse wave velocity VT remains constant.

DOI10.1021/la502182k
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