Beta/碳纳米复合分子筛膜的制备

›› 2007, Vol. 7 ›› Issue (2): 404-408.

Beta/碳纳米复合分子筛膜的制备

周志辉,邵国林,杨建华,常利峰,王金渠

大连理工大学吸附与无机膜研究所

出版日期:2007-04-20 发布日期:2007-04-20

Preparation of Beta-zeolite/Carbon Nanocomposite Membrane

ZHOU Zhi-hui,SHAO Guo-lin,YANG JIan-hua,CHANG Li-feng,WANG Jin-qu

Institute of Adsorption and Inorganic Membrane, Dalian University of Technology

Online:2007-04-20 Published:2007-04-20

摘要/Abstract

摘要： 利用浸渍提拉方法，在平均孔径500 nm的管状a-Al2O3陶瓷管载体上成功制备了无缺陷的Beta/碳纳米复合分子筛膜. 通过室温下单组分气体渗透实验，发现当Beta分子筛在聚糠醇/丙酮溶液中的含量逐渐加大时，复合膜的气体分离因数略有增加，同时气体渗透通量明显加大. 经优化后氢气渗透通量比纯碳膜增加了一个数量级，说明Beta分子筛起到了加快气体渗透通量的作用. 由SEM照片可以发现，随着Beta分子筛含量的增加，制备的纳米复合膜的厚度由平均14 mm减少到7 mm左右，从而减少了气体渗透的阻力.结合实验数据，探讨了沸石分子筛/碳复合膜气体渗透路径.

关键词: Beta分子筛, 碳分子筛, 纳米复合膜, 高渗透通量

Abstract: A novel Beta-zeolite/carbon nanocomposite membrane has been prepared on a porous α-Al2O3 substrate by dip-coating. By single component gas experiments at room temperature, the Beta-zeolite/carbon nanocomposite membrane exhibits hydrogen permeations that are one order of magnitude higher than pure carbon membrane with comparable permselectivities. It shows that Beta-zeolite acts as high gas permeable phase in membranes. From the SEM images, when the amount of Beta-zeolite is increased, the thickness of nanocomposite membrane is reduced from 14 mm to 7 mm, which is helpful to decrease the resistance of gas permeance. Finally, the pathway through nanocomposite membrane is inferred by the experimental data and SEM images.

Key words: Beta-zeolite, carbon membrane, nanocomposite membrane, high-permeance

周志辉;邵国林;杨建华;常利峰;王金渠. Beta/碳纳米复合分子筛膜的制备[J]. , 2007, 7(2): 404-408.

ZHOU Zhi-hui;SHAO Guo-lin;YANG JIan-hua;CHANG Li-feng;WANG Jin-qu. Preparation of Beta-zeolite/Carbon Nanocomposite Membrane[J]. , 2007, 7(2): 404-408.