Pervaporation separation of ethanol-water mixtures through B-ZSM-11 zeolite membranes on macroporous supports

被引：36

作者：

Chai, Lijun ^{[1
]}

Li, Huazheng ^{[2
]}

Zheng, Xiaoqin ^{[1
]}

Wang, Jinqu ^{[1
,2
]}

Yang, Jianhua ^{[1
]}

Lu, Jinming ^{[1
]}

Yin, Dehong ^{[1
]}

Zhang, Yan ^{[1
]}

机构：

[1] Dalian Univ Technol, Inst Adsorpt & Inorgan Membrane, State Key Lab Fine Chem, Dalian 116024, Liaoning, Peoples R China

[2] Dalian Univ Technol, Sch Petr & Chem Engn, State Key Lab Fine Chem, Panfin 124221, Liaoning, Peoples R China

来源：

JOURNAL OF MEMBRANE SCIENCE | 2015年 / 491卷

关键词：

Boron-substituted; B-ZSM-11 zeolite membrane; Pervaporation; Ethanol/water mixture; HIGH-PERFORMANCE; MFI MEMBRANES; HIGH-FLUX; ZSM-5; SUBSTITUTION; DEHYDRATION; FRAMEWORK; ORGANICS; BORON;

D O I：

10.1016/j.memsci.2015.01.054

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Boron-substituted silicalite-2 (B-ZSM-11) membranes were prepared on seeded cheap macroporous alpha-Al2O3 tubes to separate ethanol from water by pervaporation. The incorporation of boron atom into MEL framework was confirmed by XRD and FTIR. The effects of B/Si ratio in the synthesis solution together with PV operation temperature and feed concentration on separation properties of the membranes were investigated. The B-ZSM-11 membrane prepared with B/Si ratio of 0.06 exhibited the highest separation factor of 35.0 with a total flux of 1.51 kg m(-2) h(-1) for 5 wt% ethanol/water mixtures at 60 degrees C. The total flux increased with increasing PV temperature from 30 to 75 degrees C and the separation factor showed the highest value at 60 degrees C. The separation factor decreased with feed concentration from 1 to 7 wt% and the total flux also showed the highest value for a 5 wt% mixture. It is demonstrated that the incorporation of boron atom into MEL structure improved separation performance of B-ZSM-11 membrane for ethanol/water solutions. On the other hand, the better hydrophobicity of B-ZSM-11 membranes, evidenced by contact angle measurements, is responsible for pervaporation performance for ethanol/water mixtures. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：168 / 175

页数：8

共 38 条

[1] Pervaporation of organic/water mixtures through B-ZSM-5 zeolite membranes on monolith supports [J].