| 膜结构填料涂覆改性对精馏分离异丙醇/水体系的影响 |
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| 引用本文： | 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. DOI: 10.3969/j.issn.0438-1157.2012.12.025 |
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| 作者姓名： | 方亮 李万斌 杨志宏 孟琴 张国亮 |
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| 作者单位： | 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 |
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| 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。
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| 关 键 词： | PSf/PVDF中空纤维膜结构填料 涂覆 PDMS 异丙醇/水 精馏 |
| 收稿时间： | 2012-03-17 |
| 修稿时间： | 2012-09-20 |
Effect of coating based on various hollow fiber packings on distillation of IPA/water system |
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| 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]. Journal of Chemical Industry and Engineering(China), 2012, 63(12): 3914-3919. DOI: 10.3969/j.issn.0438-1157.2012.12.025 |
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| Authors: | FANG Liang LI Wanbin YANG Zhihong MENG Qin ZHANG Guoliang |
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| Affiliation: | 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 |
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| 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. |
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| Keywords: | PSf/PVDF hollow fiber structured packing coating PDMS IPA/water distillation |
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