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Date of Publication:2022-10-09

Journal:石油化工

Volume:40

Issue:8

Page Number:820-824

ISSN No.:1000-8144

Abstract:NaA zeolite membranes were prepared by modification of macroporous a-Al2
   O3 support,which included dip-coating with 2 mum size seed
   crystals,wiping for seeding smaller crystals with the size of about 400
   nm to form a continuous and homogeneous seed layer on the support
   surface,and dynamically hydrothermally synthesizing the membranes on the
   seeded support surface in a rotating oven.The prepared NaA zeolite
   membranes were characterized by means of SEM and XRD.The results
   indicated that the prepared membranes were continuous and dense,and
   could be prepared repeatedly.Pervaporation experiments were carried out
   under 353 K and 200 - 300 Pa in a water/ethanol system with 90%
   (w)ethanol concentration to test performance of the synthesized
   membranes.The result showed that the water flux reached 1.8 kg/(m2 ·
   h)and the separation factor was more than 10 000.

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