作者: Hidetoshi Kita , Kazunobu Fuchida , Tatsuya Horita , Hidetoshi Asamura , Kenichi Okamoto
DOI: 10.1016/S1383-5866(01)00110-1
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摘要: NaX and NaY zeolite membranes were grown hydrothermally on the surface of a porous cylindrical support. The molar compositions starting gel SiO 2 /Al O 3 =3.6-5.3 (X), 25 (Y), Na O/SiO =1.2-1.4 0.88 H O/Na O=30-50. X-ray diffraction (XRD) patterns consist peaks corresponding to support or zeolite. Si/Al ratio these zeolites determined by atomic absorption spectrophotometry was 1.3 2.1, respectively. outer-surface completely covered with randomly oriented, intergrown crystals thickness membrane about 20-30 μm, judging from scanning electron microscopy (SEM) observation. Pervaporation vapor permeation organic mixtures through investigated. showed high alcohol selectivity for several feed methanol ethanol. Furthermore, benzene observed benzene/cyclohexane benzene/n-hexane separation. High permselectivity can be attributed selective sorption into membrane.