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Molecular sieving separation of hexane isomers within nanocomposite (B)-MFI-alumina hollow fiber membranes: a modeling study

Deng, Z., Pera-Titus, M., Guo, Y. and Giroir-Fendler, A. 2010. Molecular sieving separation of hexane isomers within nanocomposite (B)-MFI-alumina hollow fiber membranes: a modeling study. Industrial & Engineering Chemistry Research 49 (22) , pp. 11697-11707. 10.1021/ie101566q

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Abstract

High quality nanocomposite B-MFI hollow fibers were successfully prepared by pore-plugging hydrothermal synthesis. The incorporation of boron into the MFI structure modifies the n-hexane/2,2-dimethylbutane vapor separation properties of the membranes, with the materials improving the n-hexane/2,2-dimethylbutane intrinsic separation factors of Al-MFI by a factor of 2 (up to a value of 200) at comparable conditions. The permeation performance of the membranes is essentially governed by a molecular sieving mechanism driven by preferential diffusion of n-C6 and configurational diffusion effects favoring n-hexane adsorption from n-hexane/2,2-dimethylbutane mixtures. A strong confinement scenario for surface diffusion of both n-hexane and 2,2-dimethylbutane seems to prevail.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Chemistry
Cardiff Catalysis Institute (CCI)
Publisher: American Chemical Society
ISSN: 0888-5885
Date of Acceptance: 22 September 2010
Last Modified: 13 Oct 2020 14:45
URI: http://orca.cf.ac.uk/id/eprint/135427

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