| 题名: | Dehydration of ethanol/water mixture by asymmetric ion-exchange membranes |
| 作者: | Cheng-Lee Lai
Rey-May Liou
Shih-Hsiung Chen
Chi-Yu Shih
J.S. Chang
Cheng-Hsien Huang
Mu-Ya Hung
Kueir-Rarn Lee |
| 贡献者: | 環境工程與科學系 |
| 关键词: | Asymmetric
Sodium-exchange
Charged membrane
Pervaporation |
| 日期: | 2010-12 |
| 上传时间: | 2012-05-31 09:57:40 (UTC+8) |
| 摘要: | Asymmetric ion-exchange membranes were prepared for dehydrating a water/ethanol mixture by pervaporation. The ion-exchange membranes (Na-PSF) were prepared by exchanging sodium ion with various degree of sulfonation polysulfone. It was observed that the charged membranes showed a significant improvement on pervaporation performance and also showed a strongly enhancement on the hydrophilic properties of Na-PSF membranes. It was found that the membrane formation pathways were only slightly affected by increasing the sodium content in the casting solution during the membrane formation process.
The improvements in the separation performance were mainly contributed by both of the enhancement on
hydrophilicity and degree of swelling during the permeate transport through the charged membranes. The
operating temperature also showed a significant influence on the separation performance of Na-PSF
membranes due to the abating hydration behavior at the higher temperatures. Amount the charged Na-PSF
membrane, the 0.58 is best optimum sodium substitution ratio for the charged membranes with a flux of
600 g m2 h1 and a selectivity of 150 for the feed concentration of 90% ethanol solution at 25 �C. |
| 關聯: | Desalination 266：p.17-24 |
| 显示于类别: | [Dept. of Environmental Engineering and Science (including master's program)] Periodical Articles
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