Browse > Article

Pervaporation Characteristics of NaA Zeolite Membrane for Water/Ethanol Mixture  

Ahn, Hyoseong (Department of Chemical Engineering, Chungnam National University)
Lee, Hyeryeon (Department of Chemical Engineering, Chungnam National University)
Lee, Yongtaek (Department of Chemical Engineering, Chungnam National University)
Publication Information
Korean Chemical Engineering Research / v.43, no.2, 2005 , pp. 243-248 More about this Journal
Abstract
Membrane pervaporation processes could have advantages over distillation for separation of water/organics mixtures: a low energy demand and the ability to separate azeotropic mixtures or isomers. Zeolite membranes might show better thermal, mechanical and chemical stabilities than polymer membranes. Water could be effectively separated from water/organic mixtures using the NaA zeolite membrane because of its high hydrophilicity. In this study, water was separated by pervaporation using the NaA zeolite membrane from water/ethanol mixtures. As a mole fraction of ethanol increased, the total permeation flux and the water flux decreased while the separation factor increased, reached a maximum point, and decreased. As an experimental temperature increased, the total permeation flux increased while the separation factor increased at the lower mole fraction of ethanol than 0.8 and it decreased at the higher mole fraction of ethanol than 0.8. The total permeation flux and the separation factor could be maintained constant during the long term experiment longer than 160 hours. It was found that the NaA zeolite membrane synthesized in our study showed better performance on water/ethanol separation than that of a distillation process or PVA polymeric pervaporation membranes.
Keywords
Zeolite Membrane; NaA Zeolite; Water/Ethanol; Pervaporation;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Hofmann, D., Fritz, L. and Paul, D., 'Molecular Modelling of Pervaporation Separation of Binary Mixtures with Polymeric Membranes,' J. Membrane Sci., 144(1-2), 145-149(1998)   DOI   ScienceOn
2 Kondo, M., Komori, M., Kita, H. and Okamoto, K., 'Tubular- Type Pervaporation Module with Zeolite NaA Membrane,' J. Membrane Sci., 133(1), 133-141(1997)   DOI   ScienceOn
3 Hong, Y. K. and Hong, W. H., 'Pervaporation Characteristics of Aqueous Isopropanol Solution using Tubular Type PDMS/ Ceramic Composite Membrane,' HWAHAK KONGHAK, 36(4), 524-529(1998)
4 Shah, D., Kissick, K., Ghorpade, A., Hannah, R. and Bhattacharyya, D., 'Pervaporation of Alcohol-Water and Dimethylformaide- Water Mixtures using Hydrophilic Zeolite NaA Membranes: Mechanisms and Experimental Results,' J. Membrane Sci., 179(1-2), 185-205(2000)   DOI   ScienceOn
5 Noble, R. D. and Stern, S. A., Membrane Separation Technology Principles and Application, Elsevier Science B. V., The Netherlands( 1995)
6 Pereira, C. C., Habert, A. C., Nobrega, R. and Borges, C. P., 'New Insights in the Removal of Diluted Volatile Organic Compounds from Dilute Aqueous Solution by Pervaporation Process,' J. Membrane Sci., 138(2), 227-235(1998)   DOI   ScienceOn
7 Lee, Y. M., 'Pervaporation of Organic Liquid Mixtures Through Polymer Membranes,' Polymer, 13(1), 3-13(1989)
8 Liu, Q., Noble, R. D., Falconer, J. L. and Funke, H. H., 'Organics/ Water Separation by Pervaporation with a Zeolite Membrane,' J. Membrane Sci., 117(1-2), 163-174(1996)   DOI   ScienceOn
9 Kita, H., Horii, K., Ohtoshi, Y., Tanaka, K. and Okamoto, K., 'Synthesis of a Zeolite NaA Membrane for Pervaporation of Water/Organic Liquid Mixtures,' Journal of Materials Science Letters, 14(3), 206-208(1995)   ScienceOn
10 Breck, D. W., Zeolite Molecular Sieves, John Wiley & Sons, New York(1974)