Permeation properties of templated and template-free ZSM-5 membranes

Gopalakrishnan, Suraj, Yamaguchi, Takeo and Nakao, Shin-ichi (2006) Permeation properties of templated and template-free ZSM-5 membranes. Journal of Membrane Science, 274 1-2: 102-107. doi:10.1016/j.memsci.2005.08.005


Author Gopalakrishnan, Suraj
Yamaguchi, Takeo
Nakao, Shin-ichi
Title Permeation properties of templated and template-free ZSM-5 membranes
Journal name Journal of Membrane Science   Check publisher's open access policy
ISSN 0376-7388
Publication date 2006-01-01
Sub-type Article (original research)
DOI 10.1016/j.memsci.2005.08.005
Volume 274
Issue 1-2
Start page 102
End page 107
Total pages 6
Publisher Elsevier
Language eng
Subject 0905 Civil Engineering
0915 Interdisciplinary Engineering
Abstract Following the secondary growth procedure, ZSM-5 zeolite membranes were synthesized over porous alpha-alumina supports from clear template-free precursor solution and their permeation properties were compared with membranes prepared using templates. SEM analysis revealed that the templated membrane (M1) contained smaller crystals with more number of faces than their template-free counterpart (M2). Identical XRD patterns confirmed their ZSM-5 crystal structure. The expected size selectivity could not be achieved for M1 as this membrane possessed some micro defects, induced by the calcination procedure. M2 could achieve the required size selectivity at ambient temperatures and shape selectivity at 200 °C and gas permeation was mostly activated diffusion. Selectivity ratio of 44 was achieved for butane isomers through M2 with n-butane molecules experiencing maximum activation (43 kJ/mol). In general, permeation values measured for M2 membranes were an order lower than those of M1 membranes.
Keyword Zeolite Membranes
Permeation
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
School of Chemical Engineering Publications
 
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Created: Thu, 04 May 2006, 00:42:09 EST