A型沸石分子筛膜微波合成及渗透汽化性能

被引：23

作者：

董强

徐南平

时钧

机构：

[1] 南京化工大学膜科学技术研究所、江苏省化学工程与技术重点实验室!江苏南京,南京化工大学膜科学技术研究所、江苏省化学工程与技术重点实验室!江苏南京,南京化工大学膜科学技术研究所、江苏省化学工程与技术重点实验室!江苏南京

来源：

化工学报 | 2001年 / 08期

关键词：

A型沸石; 膜; 微波合成; 渗透汽化;

D O I：

暂无

中图分类号：

TQ028.8 [新型分离法];

学科分类号：

100112 [医学生物化学与分子生物学];

摘要：

The A-type zeolite membrane was synthesized on a porous TiO 2 support by using dip-coating and microwave heating.The influence of chemical composition of precursor on the formation of zeolite membrane was investigated.The results showed that the concentration of the precursor determines the performance of zeolite membrane.The zeolite A crystals and the surface morphology of membrane were characterized by XRD and SEM.For the zeolite membrane,the particle size on its surface and the thickness of top-layer was about 0.5?μm and 1?μm,respectively.The permeability of H 2 and N 2 hardly changed with pressure and its permselectivity of H 2 to N 2 was about 5,more than that of Knudsen diffusion.It suggested that the zeolite A membrane exhibits partial molecular sieving.According to pervaporation measurements by using H 2O/EtOH mixture,the flux and selectivity of the A-type zeolite membrane for 5% H 2O/95% EtOH(mass) mixture at 323?K was 0.335?kg·m -2 ·h -1 and 690,respectively.

引用

页码：749 / 752

页数：4