A semi-continuous method for the synthesis of NaA zeolite membranes on tubular supports

被引：55

作者：

Pina, MP ^{[1
]}

Arruebo, M ^{[1
]}

Felipe, A ^{[1
]}

Fleta, F ^{[1
]}

Bernal, MP ^{[1
]}

Coronas, J ^{[1
]}

Menéndez, M ^{[1
]}

Santamaría, J ^{[1
]}

机构：

[1] Univ Zaragoza, Dept Chem Engn, Zaragoza 50009, Spain

来源：

JOURNAL OF MEMBRANE SCIENCE | 2004年 / 244卷 / 1-2期

关键词：

zeolite NaA membranes; semi-continuous synthesis; renewal rate; pervaporation; ethanol dehydration;

D O I：

10.1016/j.memsci.2004.06.049

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Zeolite NaA membranes have been synthesized by secondary growth on the external surface of a-alumina tubular supports using a semicontinuous system in which fresh gel was periodically supplied to the synthesis vessel. Compared to traditional batch methods, the procedure developed in this work provides a better control of the synthesis and crystallization conditions and is easier to implement at an industrial scale. The influence of the renewal rate during synthesis on the pervaporation and vapor permeation performance of the membranes was studied, with the best performance corresponding to the case where the gel was renewed every 20 min of synthesis time. The membranes obtained by the semi-continuous method displayed an excellent separation performance in the pervaporation of ethanol/water mixtures (e.g., a separation factor of 3600 at a water permeation flux of 3.8 kg/h m(2)). (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：141 / 150

页数：10

共 26 条

[1] Driving force for pervaporation through zeolite membranes [J].