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Pervaporation and Vapor Permeation Characteristics of a Porous SiO2-ZrO2 Membrane for Separation of Organic Solvents/Water Mixtures

  • Masashi Asaeda (a1) and Yasuhumi Tasaka (a1)

The sol-gel techniques were applied to fabricate some improved porous SiO2-ZrO2(50%) membranes for separation of organic solvents/water mixtures by pervaporation and vapor permeation methods at the normal boiling points of mixtures such as iso-propanol(IPA)/water and 1-propanol /water mixtures. The porous SiO2-ZrO2 membranes were found quite stable even at a high water content in the feed mixtures. They showed quite large pervaporation fluxes more than 450moles/(m2h) at 73mol% of IPA in the feed, for example, while the water flux for vapor phase separation at the same conditions was around 250mol/(m2h). The separation characteristics of organic chemicals/water mixtures by pervaporation and the vapor permeation methods are largely different in many points. Especially in this work separation by vapor permeation has been studied to compare with that of pervaporation taking into account the vapor-liquid equilibrium characteristics of the mixtures.

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1. Asaeda, M., Yang, J. and Sakou, Y., “Porous Silica-Zirconia (50%) Membranes for Pervaporation of iso-Propanol Alcohol(IPA)/Water Mixtures,” J. Chemical Engineering of Japan 35, 365(2002)
2. Asaeda, M., Sakou, Y., Yang, Y. and Shimasaki, K., “Stability and perormance of porous silica-zirconia composite membranes for pervaporation of aqueous organic solutions,” J. Membrane Science 209, 163(2002)
3. Asaeda, M., Okazaki, K. and Nakatani, A.,”Preparation of thin porous silica membranes for separation of non-aqueous organic solvent mixtures by pervaporation,” Ceramic Transactions 31, 411(1992)
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MRS Online Proceedings Library (OPL)
  • ISSN: -
  • EISSN: 1946-4274
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