A high ZIF-8 loading PVA mixed matrix membrane on alumina hollow fiber with enhanced ethanol dehydration

Geng Sheng Lin, Yi Rui Chen, Ta Hsuan Chang, Tse Chiang Huang, Guo Liang Zhuang, Wei Zhi Huang, Yu Cheng Liu, Hideto Matsuyama, Kevin C.W. Wu, Kuo Lun Tung*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

In this work, a zeolitic imidazolate framework-8 (ZIF-8)/polyvinyl alcohol (PVA) mixed matrix membrane (MMM) was coated onto α-aluminum oxide (α-Al2O3) hollow fibers for ethanol dehydration by utilizing the pervaporation technique. ZIF-8/PVA solution was prepared via a drying-free, water-based method to obtain a uniform distribution MMM. Before coating the MMM onto the hollow fiber, a pristine PVA solution was first dip-coated onto hollow fiber as a gutter layer to prevent phase separation. Different weight ratios of ZIF-8-loaded MMMs were prepared. The results showed that at high ZIF-8 loading (39 wt %), a high permeate flux (685 g/m2 h) and high separation factor (4821) can be observed. Furthermore, compared with free-standing ZIF-8/PVA MMMs, hollow fiber supported ZIF-8/PVA MMMs exhibit a thinner coating thickness but higher pervaporation separation index (approximately 1.5–2 times). The main contribution of this study is not only fabricated the high loading ZIF-8/PVA composite membrane with enhanced performance, but also coated onto the hollow fiber membrane which opens a gate for scale-up production.

Original languageEnglish
Article number118935
JournalJournal of Membrane Science
Volume621
Early online date30 Nov 2020
DOIs
Publication statusPublished - 1 Mar 2021

Keywords / Materials (for Non-textual outputs)

  • Alcohol dehydration
  • Biofuel
  • Mixed-matrix membrane
  • Pervaporation
  • ZIF-8

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