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NaA Zeolite Membrane with High Performance Synthesized by Vapor Phase Transformation Method
Author(s) -
Cheng ZhiLin,
Chao ZiSheng,
Lin HaiQiang,
Wan HuiLin
Publication year - 2003
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.20030211107
Subject(s) - chemistry , zeolite , transformation (genetics) , vapor phase , phase (matter) , membrane , chemical engineering , organic chemistry , catalysis , thermodynamics , biochemistry , physics , engineering , gene
Abstract NaA zeolite membrane was synthesized with high permeance on porous alumina substrate by the vapor phase transformation method. The membranes were characterized by XRD and SEM techniques. The XRD results showed that the membranes after the synthesis time of 24 h consisted of the pure NaA zeolite crystals. The SEM results showed that the membranes after the synthesis time of 48 h consisted of intergrown zeolite crystals. The H 2 permeance of the NaA zeolite membranes was higher than 2.0 × 10 −6 mol/(Pa · m 2 · s), and the maximum of the gas H 2 /C 3 H 8 permselectivity was 7.15, which is higher than the corresponding Knudsen diffusion selectivity of which is 4.69.