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Pervaporation Separation and Catalysis Activity of Novel Zirconium Silicalite‐1 Zeolite Membrane
Author(s) -
Chen Pei,
Chen Xinbing,
Chen Xiangshu,
An Zhongwei,
Kita Hidetoshi
Publication year - 2009
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.200990284
Subject(s) - pervaporation , zeolite , chemistry , zirconium , membrane , inorganic chemistry , mullite , fourier transform infrared spectroscopy , catalysis , chemical engineering , tetraethyl orthosilicate , nuclear chemistry , analytical chemistry (journal) , chromatography , organic chemistry , ceramic , permeation , biochemistry , engineering
Novel zirconium silicalite‐1 zeolite membrane was hydrothermally prepared on the mullite porous support at 150–185°C for 40–72 h by an " in situ " method using tetraethyl orthosilicate (TEOS), zirconium butoxide (ZBOT) and tetrapropylammonium hydroxide (TPAOH) as silica source, zirconium source and organic structure directing agent, respectively. X‐ray diffraction (XRD) patterns, fourier transformed infrared (FT‐IR) spectra, and inductively coupled plasma‐atomic emission spectrometry (ICP) of the accompanying zeolite powder confirmed that the zirconium was isomorphously incorporated into the zeolite framework. The surface chemical compositions of the obtained membrane were measured with an energy‐dispersive X‐ray spectral analyzer (EDS), and the membrane morphologies were observed by a scanning electron microscope (SEM). The results showed that the zeolite crystals growing on the support were zirconium silicalite‐1 zeolites, and the dense membrane layer was composed of the well inter‐growing zeolite crystals. The zirconium silicalite‐1 zeolite membrane, which was derived from the synthesis solution having a molar ratio of 1.00SiO 2 :0.01ZrO 2 :0.17TPAOH:120H 2 O, showed high ethanol permselectivity with a flux of 1.01 kg/(m 2 ·h) accompanied with a separation factor of 73 for ethanol/water (5/95, w/w ) system under a pervaporation condition at 60°C. Moreover, this membrane displayed pervaporation‐aided catalysis activity for iso ‐propanol oxidation with hydrogen peroxide as oxidant, and the corresponding iso ‐propanol conversion was 35%.