High - flux MFI zeolite membrane supported on YSZ hollow fiber for separation of ethanol / water / Xiaojun Shu in Industrial & engineering chemistry research, Vol. 51 N° 37 (Septembre 2012)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 51 N° 37 (Septembre 2012) . - pp 12073–12080 Titre : High - flux MFI zeolite membrane supported on YSZ hollow fiber for separation of ethanol / water Type de document : texte imprimé Auteurs : Xiaojun Shu, Auteur ; Xuerui Wang, Auteur ; Qingqing Kong, Auteur Année de publication : 2012 Article en page(s) : pp 12073–12080 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Zeolite Ethanol Résumé : Pure-silica MFI zeolite (silicalite-1) membranes exhibit great potential in the separation of an ethanol/water mixtures. For synthesis of silicalite membranes, however, conventional supports such as α-Al2O3 and mullite have aluminum element leaching out and entering into a zeolite structure, which would reduce the hydrophobicity of the zeolite layer and thus affect the separation performance for ethanol selectivity. In this paper, we prepared silicalite membranes on hollow fiber substrates fabricated with yttria stabilized zirconia (YSZ) without aluminum. The influence of seed size, synthesis parameters, and substrates was investigated. The as-synthesized membranes were characterized by scanning electron microscopy (SEM), electron probe microanalyzer (EPMA), infrared spectrum analysis (IR), and X-ray diffraction (XRD). A thin MFI zeolite layer with a thickness of about 3 μm could be formed on the support, which exhibited highly selective to ethanol over water. A high flux of 7.4 kg m–2 h–1 with the separation factor (ethanol/water) of 47 was achieved on the as-made membrane for separating 5 wt % ethanol/water at 60 °C. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie301087u [article] High - flux MFI zeolite membrane supported on YSZ hollow fiber for separation of ethanol / water [texte imprimé] / Xiaojun Shu, Auteur ; Xuerui Wang, Auteur ; Qingqing Kong, Auteur . - 2012 . - pp 12073–12080. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 37 (Septembre 2012) . - pp 12073–12080 Mots-clés : Zeolite Ethanol Résumé : Pure-silica MFI zeolite (silicalite-1) membranes exhibit great potential in the separation of an ethanol/water mixtures. For synthesis of silicalite membranes, however, conventional supports such as α-Al2O3 and mullite have aluminum element leaching out and entering into a zeolite structure, which would reduce the hydrophobicity of the zeolite layer and thus affect the separation performance for ethanol selectivity. In this paper, we prepared silicalite membranes on hollow fiber substrates fabricated with yttria stabilized zirconia (YSZ) without aluminum. The influence of seed size, synthesis parameters, and substrates was investigated. The as-synthesized membranes were characterized by scanning electron microscopy (SEM), electron probe microanalyzer (EPMA), infrared spectrum analysis (IR), and X-ray diffraction (XRD). A thin MFI zeolite layer with a thickness of about 3 μm could be formed on the support, which exhibited highly selective to ethanol over water. A high flux of 7.4 kg m–2 h–1 with the separation factor (ethanol/water) of 47 was achieved on the as-made membrane for separating 5 wt % ethanol/water at 60 °C. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie301087u

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