膜结构填料涂覆改性对精馏分离异丙醇/水体系的影响

doi:10.3969/j.issn.0438-1157.2012.12.025

化工学报 ›› 2012, Vol. 63 ›› Issue (12): 3914-3919.DOI: 10.3969/j.issn.0438-1157.2012.12.025

膜结构填料涂覆改性对精馏分离异丙醇/水体系的影响

方亮^1,2, 李万斌^1,2, 杨志宏^1,2, 孟琴³, 张国亮^1,2

1. 浙江工业大学化学工程与材料学院, 浙江杭州 310014;
2. 浙江工业大学生物与环境工程学院, 浙江杭州 310014;
3. 浙江大学材料与化学工程学院, 浙江杭州 310027

收稿日期:2012-03-17 修回日期:2012-09-20 出版日期:2012-12-05 发布日期:2012-09-21
通讯作者: 张国亮
作者简介:方亮(1986-),男,硕士研究生。
基金资助:
国家自然科学基金项目(21236008,20976163)。

Effect of coating based on various hollow fiber packings on distillation of IPA/water system

FANG Liang^1,2, LI Wanbin^1,2, YANG Zhihong^1,2, MENG Qin³, ZHANG Guoliang^1,2

1. College of Chemical Engineering & Material Science, Zhejiang University of Technology, Hangzhou 310014, Zhejiang, China;
2. College of Biology & Environmental Engineering, Zhejiang University of Technology, Hangzhou 310014, Zhejiang, China;
3. College of Material & Chemical Engineering, Zhejiang University, Hangzhou 310027, Zhejiang, China

Received:2012-03-17 Revised:2012-09-20 Online:2012-12-05 Published:2012-09-21
Supported by:
supported by the National Natural Science Foundation of China(21236008,20976163).

摘要/Abstract

摘要： 采用聚二甲基硅氧烷(PDMS)对聚砜(PSf)、聚偏氟乙烯(PVDF)两种不同材料中空纤维膜结构填料进行了疏水涂覆改性,并研究了改性前后膜结构填料在异丙醇/水体系精馏分离中的材料性能变化。实验结果表明:PDMS涂覆使PVDF膜的分离效果提高了约20%,但使PSf膜的分离效果下降3%~10%。经涂覆后,膜结构填料的传质单元高度均在20 cm以下,最小可达5 cm左右;所有膜结构填料均可突破传统精馏操作弹性限制,其传质时间小于10 s,水力学特性和传质效率更优。

关键词: PSf/PVDF中空纤维膜结构填料, 涂覆, PDMS, 异丙醇/水, 精馏

Abstract: The composite polydimethylsiloxane(PDMS)/polysulfone(PSf)and PDMS/polyvinylidenefluoride(PVDF)hollow fiber membranes were prepared by dip-coating modification for the distillation of isopropanol(IPA)/water solution.Compared with the PVDF and PSf hollow fiber membrane contactors,the distillate concentration of membrane contactors packed with PDMS/PVDF and PDMS/PSf hollow fibers was increased by 20% and decreased by 3%~10%,respectively.The height of mass transfer unit of modified packing could be less than 20 cm and the minimum is 5 cm.Mass transfer time was generally less than 10 s.All contactors can be operated normally without considering the flooding and loading limits of conventional packings,which presents great advantages in both hydraulic performance and separation efficiency.

Key words: PSf/PVDF hollow fiber structured packing, coating, PDMS, IPA/water, distillation

中图分类号:

TQ028.8

方亮, 李万斌, 杨志宏, 孟琴, 张国亮. 膜结构填料涂覆改性对精馏分离异丙醇/水体系的影响[J]. 化工学报, 2012, 63(12): 3914-3919.

FANG Liang, LI Wanbin, YANG Zhihong, MENG Qin, ZHANG Guoliang. Effect of coating based on various hollow fiber packings on distillation of IPA/water system[J]. CIESC Journal, 2012, 63(12): 3914-3919.

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膜结构填料涂覆改性对精馏分离异丙醇/水体系的影响

Effect of coating based on various hollow fiber packings on distillation of IPA/water system

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