The novel of high efficiency recovery technology for dehydration of alcohol solutions by a pervaporation process

Teng Chien Chen, Tai Hsiang Chen, Rou Yi Wu, Yao Hui Huang

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Hybrid membranes composed of polyvinylalcohol and polyacrylonitrile crosslinked respectively by maleic anhydride (B3 membrane), glutaric dialdehyde, and formaldehyde were tested for their abilities to dehydrate alcohol solutions (ethanol, isopropanol, and n-butanol) by a pervaporation (PV) method. The structure and thermal stability of the membrane were also determined by scanning electron microscopy and thermogravimetric analysis. The preliminary PV experiment carried out at 70 °C with the water level in the feed solution fixed at 5 wt% showed that both the separation factor and the PV separation index were much higher with the B3 membrane than with the other two membranes. Subsequently, the B3 membrane was used to determine how the water concentration and the system temperature affect the dehydration performance. The results show that the separation factor increases while the total flux decreases as the water concentration decreases and the operation temperature decreases. In this study, the observed highest separation factor is 200 (for the ethanol solution), 6700 (for the isopropanol solution), and 2500 (for the n-butanol solution) when the temperature is fixed at 50 °C and the water concentration at 1 wt%.

Original languageEnglish
Pages (from-to)171-177
Number of pages7
JournalSustainable Environment Research
Volume23
Issue number3
Publication statusPublished - 2013 Jan 1

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Water Science and Technology
  • Waste Management and Disposal
  • Pollution

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