NaA zeolite/carbon nanocomposite thin films with high permeance for CO2/N2 separation

被引：37

作者：

Zhou, Zhihui ^{[1
]}

Yang, Hanhua ^{[1
]}

Zhang, Yan ^{[1
]}

Chang, Lifeng ^{[1
]}

Sun, Weiguo ^{[1
]}

Wang, Jinqu ^{[1
]}

机构：

[1] Dalian Univ Technol, State Key Lab Fine Chem, Inst Adsorpt & Inorgan Membrane, Sch Chem Engn, Dalian 116012, Peoples R China

来源：

SEPARATION AND PURIFICATION TECHNOLOGY | 2007年 / 55卷 / 03期

基金：

中国国家自然科学基金;

关键词：

NaA zeolite; carbon materials; nanocomposite; thin films; high permeance;

D O I：

10.1016/j.seppur.2006.12.009

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Novel NaA zeolite/carbon nanocomposite thin films were successfully prepared on a porous alpha-Al2O3 substrate by dip-coating method. The prepared films were characterized by XRD, SEM and single gas permeation tests. NaA zeolite/carbon nanocomposite thin films exhibited the ideal separation factor of CO2/N-2 of 6.04 with the carbon dioxide -permeance of 3.39 x 10(-7) mol Pa- I M-2 s- 1 at room temperature and 100 kPa, which was two orders of magnitude higher than that of pure carbon membrane reported by previous literature. The observed adsorption isotherms indicated that the incorporation of zeolite NaA crystal improved the CO2 adsorption ability of carbon materials, and decreased its N-2 adsorption ability. The ideal permselectivity of CO2/N-2 Of carbon/NaA composite films was 6.04, higher than the ideal adsorption selectivity, probably because the small Molecule of CO2 diffused faster than N-2. From the SEM images, the thickness of nanocomposite films was 1-2 mu m, which was helpful to decrease the resistance and increase the flux of gas permeance. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：392 / 395

页数：4

共 17 条

[1] Novel synthesis of FAU-type zeolite membrane with high performance [J].