Design and Synthesis of Acid-resistant Zeolite T/NaY Composite Membrane for Water/Ethanol Separation
- Resource Type
- Article
- Authors
- Xiangbo Li; Zhihui Zhou; Liang Chen; Chunlong Kong; Hongbin Du
- Source
- Bulletin of the Korean Chemical Society, 40(6), pp.511-516 Jun, 2019
- Subject
- 화학
- Language
- English
- ISSN
- 1229-5949
0253-2964
The random distribution of zeolite T on the porous α-Al2O3 tube during growth greatly limits its application in the industry. In this study, the defective zeolite T layer is modified with zeolite NaY. A continuous and dense zeolite T/NaY composite membrane is obtained through characterization by scanning electron microscope and X-ray diffraction. The resulting composite membrane exhibits high selectivity and high permeation flux for 90?wt % ethanol/water solution at 75 °C. Water concentration in the permeation side of the as-synthesized zeolite T/NaY composite membrane is >99.9 wt %, whereas that of primary zeolite T layer is only 60.4 wt %. The water permeation flux of the composite membrane reaches 4.35?kg/m2/h1. The composite membrane displays good stability in acid solution when the pH of the solution is >5.