点击次数：

论文类型：期刊论文

发表时间：2011-09-05

发表刊物：SEPARATION AND PURIFICATION TECHNOLOGY

收录刊物：Scopus、SCIE、EI

卷号：81

期号：1

页面范围：1-11

ISSN号：1383-5866

关键字：Na-ferrierite membrane; Tubular support; Gas permeation; Pervaporation

摘要：Using pyridine as template, polycrystalline Na-ferrierite membrane with thickness of about 30 mu m was prepared successfully on macroporous alpha-Al2O3 support in a short crystallization time by conventional and vacuum-assisted secondary growth. The effects of synthesis parameters such as template, alkalinity and dilution were investigated. The characterization and properties of Na-ferrierite membrane prepared using parent gel with molar composition of 1Al(2)O(3):60SiO(2):6Na(2)O:1835H(2)O:64C(5)H(5)N were detected. The three-stage synthesized Na-ferrierite membrane had the best properties with the single-gas permeances of H-2 > CH4 > O-2 > N-2 > CO2 > C3H8 > SF6. The separation properties of Na-ferrierite membrane were evaluated by benzene/p-xylene pervaporation test. With increasing the benzene feed concentration, the fluxes of benzene and p-xylene increased and decreased, respectively, and the separation factor decreased firstly and increased afterward. Furthermore, the formation mechanism of the compact Na-ferrierite membrane was proposed. (C) 2011 Elsevier B.V. All rights reserved.