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Synthesis of nanostructure hydroxy sodalite composite membranes via hydrothermal method: support surface modification and synthesis method effects
Author(s) -
Kalantari Neda,
Vaezi Mohammad Javad,
Yadollahi Mostafa,
Babaluo Ali Akbar,
Bayati Behruz,
Kazemzadeh Akram
Publication year - 2014
Publication title -
asia‐pacific journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.348
H-Index - 35
eISSN - 1932-2143
pISSN - 1932-2135
DOI - 10.1002/apj.1844
Subject(s) - sodalite , permeance , membrane , hydrothermal synthesis , zeolite , permeation , chemical engineering , hydrothermal circulation , materials science , chemistry , organic chemistry , catalysis , biochemistry , engineering
Multilayer hydroxy sodalite zeolite membranes were synthesized on the outer surface of support with and without modification via in situ and secondary growth hydrothermal synthesis methods. The synthesized zeolite membranes were characterized by X‐ray diffraction, scanning electron microscopy, and single gas (H 2 , N 2 , and n ‐pentane) permeation measurements at different pressure differences. The membranes synthesized by secondary growth method on the modified support were found to be highly intergrown, but the permeation results for hydrogen and n ‐pentane at a temperature of 323 K were not repeatable, which can be related to the weak interaction between zeolite layer and substrate. High performance hydroxy sodalite zeolite membrane was successfully formed on a nonmodified α ‐Al 2 O 3 support by in situ hydrothermal synthesis method. No permeance of n ‐pentane was measured for this membrane at 323 K and 2 bar so that infinite permselectivity of H 2 / n ‐C 5 H 12 could be obtained for the four‐layer synthesized membrane on the nonmodified support, verifying the synthesis of a good quality hydroxy sodalite zeolite membrane. © 2014 Curtin University of Technology and John Wiley & Sons, Ltd.