Synthesis of a self-supporting faujasite zeolite membrane using geopolymer gel for separation of alcohol/water mixture

A self-supporting faujasite (FAU) zeolite membrane was synthesized by in situ hydrothermal method at 90 degree C for 15h from a Na2O-3SiO2-Al2O3 geopolymer gel that was prepared from the raw materials metakaolin and sodium silicate solutions (molar ratio of SiO2/Na2O=1). The results revealed that th...

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Bibliographic Details
Published in:Materials letters 2014-02, Vol.116, p.167-170
Main Authors: Zhang, Jin, He, Yan, Wang, Yi-pin, Mao, Jin, Cui, Xue-min
Format: Article
Language:English
Subjects:
Alcohols
Composition effects
Membranes
Pervaporation
Raw materials
Separation
Synthesis
Zeolites
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Summary:A self-supporting faujasite (FAU) zeolite membrane was synthesized by in situ hydrothermal method at 90 degree C for 15h from a Na2O-3SiO2-Al2O3 geopolymer gel that was prepared from the raw materials metakaolin and sodium silicate solutions (molar ratio of SiO2/Na2O=1). The results revealed that the BET surface area and the compressive strength of the FAU zeolite membrane were 63.31m2/g and 19.6MPa, respectively. The pervaporation study of its separation performance in a C2H5OH/H2O mixture demonstrated that the permeate flux and separation factor can reach 1.41kg/(h.m2) and 16.8, respectively, at a feed temperature of 50 degree C and an alcohol composition of 70wt%, making it an effective pervaporation membrane for the separation of alcohol/water mixtures.
ISSN:0167-577X
DOI:10.1016/j.matlet.2013.11.008