Titre du document / Document title

Tubular-type pervaporation module with zeolite NaA membrane

Auteur(s) / Author(s)

KONDO M. ⁽¹⁾ ; KOMORI M. ⁽¹⁾ ; KITA H. ⁽²⁾ ; OKAMOTO K.-I. ⁽²⁾ ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

⁽¹⁾ Mitsui Engineering and Shipbuilding Co. Ltd., 1 Yawatakaigan-dori, Ichihara, Chiba 290, JAPON
⁽²⁾ Yamaguchi University, Tokiwadai, Ube 755, JAPON

Résumé / Abstract

Zeolite NaA membranes were prepared on the surfaces of porous tubular supports composed of mullite, α-alumina and/or cristobalite using the hydrothermal synthesis. The zeolite NaA crystals and the surface morphologies of the membranes were characterized by X-ray diffraction and SEM. EPMA analysis revealed that the zeolite composite membranes consisted of three layers - the zeolite layer, the intermediate layer and the mullite support. According to pervaporation measurements using H₂O/EtOH mixture, the permselectivity increased with an increase in the alumina content of the substrate and reached a constant at >70 wt% Al₂O₃. Zeolite NaA membrane showed very high water-selective permeation through all the ethanol concentrations. The tubular-type module with ca. 0.5 m² membrane area was composed of 17 pieces of zeolite membrane using 65 wt% alumina content substrate, which has high pervaporation performance and can be purchased at a low price. The efficiency of the module on permeation rate increased in proportion to the feed flow rate and exhibited 100% at Reynolds number >80. Pervaporation flux and separation factor of the module for 5 wt% water/95 wt% ethanol mixture at 95°C was ca. 2.35 kg/m².h and was greater than 5000, respectively.

Revue / Journal Title

Journal of membrane science   ISSN 0376-7388   CODEN JMESDO 

Source / Source

Congrès
International Congress on Membrane Process, Yokohama , JAPON (18/08/1996)
1997, vol. 133, n^o1, pp. 133-141 (14 ref.)

Langue / Language

Anglais

Editeur / Publisher

Elsevier, Amsterdam, PAYS-BAS  (1976) (Revue)

Mots-clés anglais / English Keywords

Membrane separation ; Pervaporation ; Dehydration ; Water ; Primary alcohol ; Ethanol ; Tubular membrane ; Composite material ; Molecular sieve ; Zeolite ; Mullite ; Alumina ; Cristobalite ; Preparation ; Characterization ; Performance ; Flux density ; Selectivity ; Selective permeability ; Experimental study ;

Mots-clés français / French Keywords

Séparation par membrane ; Pervaporation ; Déshydratation ; Eau ; Alcool primaire ; Ethanol ; Membrane tubulaire ; Matériau composite ; Tamis moléculaire ; Zéolite ; Zéolite NaA ; Mullite ; Alumine ; Cristobalite ; Préparation ; Caractérisation ; Performance ; Densité flux ; Sélectivité ; Perméabilité sélective ; Etude expérimentale ;

Mots-clés espagnols / Spanish Keywords

Separación por membrana ; Pervaporación ; Deshidratación ; Agua ; Alcohol primario ; Etanol ; Membrana tubular ; Material compuesto ; Tamiz molecular ; Zeolita ; Mullita ; Alúmina ; Preparación ; Caracterización ; Rendimiento ; Densidad flujo ; Selectividad ; Permeabilidad selectiva ; Estudio experimental ;

Localisation / Location

INIST-CNRS, Cote INIST : 17232, 35400006892310.0120