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Effects of synthesis parameters on zeolite membrane formation and performance by microwave technique
Author(s) -
Kuanchertchoo N.,
Suwanpreedee R.,
Kulprathipanja S.,
Aungkavattana P.,
Atong D.,
Hemra K.,
Rirksomboon T.,
Wongkasemjit S.
Publication year - 2007
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.1295
Subject(s) - pervaporation , membrane , zeolite , chemistry , substrate (aquarium) , chemical engineering , hydrothermal synthesis , seeding , porosity , microwave , hydrothermal circulation , catalysis , organic chemistry , permeation , biochemistry , oceanography , physics , aerospace engineering , engineering , geology , quantum mechanics
Recently, zeolite membranes on porous supports have been extensively studied in the ethanol–water separation process for further use for gasohol production. This work focuses on a NaA membrane synthesized on an α‐Al 2 O 3 support via microwave hydrothermal treatment. Synthesis temperature and time, type of substrate, seed amount and seeding time for the layer growth of the membrane are considered. The formation of as‐synthesized membranes is discussed according to observations by SEM and XRD. In addition, a preliminary study of the performance of the synthesized NaA zeolite membrane was conducted using the pervaporation technique. It was found that, for the synthesized continuous NaA membranes prepared using a 0.5 µm NaA crystal seed concentration of 3 g/l via vacuum seeding, the optimum conditions were 363 K synthesis temperature for 15–20 min via microwave heating. The flux and the separation factor obtained were 1.6 kg/m 2 h and 1760.5, respectively, for the substrate without an intermediate layer. Interestingly, the substrate with an intermediate layer showed better flux and separation factor at 1.7 kg/m 2 h and 6532.7, respectively. Copyright © 2007 John Wiley & Sons, Ltd.