Hydrophobic *BEA-Type Zeolite Membranes on Tubular Silica Supports for Alcohol/Water Separation by Pervaporation
Hydrophobic pure-silica *BEA-type zeolite membranes with large pores were prepared on tubular silica supports by hydrothermal synthesis using a secondary growth method and were applied to the separation of alcohol/water mixtures by pervaporation (PV), an alternative energy-efficient process for prod...
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| Language: | English |
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MDPI AG
2019-07-01
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| Series: | Membranes |
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| Online Access: | https://www.mdpi.com/2077-0375/9/7/86 |
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| author | Kyohei Ueno Saki Yamada Toshinari Watanabe Hideyuki Negishi Takuya Okuno Hiromasa Tawarayama Shinji Ishikawa Manabu Miyamoto Shigeyuki Uemiya Yasunori Oumi |
| author_facet | Kyohei Ueno Saki Yamada Toshinari Watanabe Hideyuki Negishi Takuya Okuno Hiromasa Tawarayama Shinji Ishikawa Manabu Miyamoto Shigeyuki Uemiya Yasunori Oumi |
| author_sort | Kyohei Ueno |
| collection | DOAJ |
| description | Hydrophobic pure-silica *BEA-type zeolite membranes with large pores were prepared on tubular silica supports by hydrothermal synthesis using a secondary growth method and were applied to the separation of alcohol/water mixtures by pervaporation (PV), an alternative energy-efficient process for production of biofuels. Amorphous pure-silica tubular silica supports, free of Al atoms, were used for preparing the membranes. In this study, the effects of the synthesis conditions, such as the H<sub>2</sub>O/SiO<sub>2</sub> and NH<sub>4</sub>F/SiO<sub>2</sub> ratios in the synthetic gel, on the membrane formation process and separation performance were systematically investigated. The successfully prepared dense and continuous membranes exhibited alcohol selectivity and high flux for the separation of ethanol/water and butanol/water mixtures. The pure-silica *BEA membranes obtained under optimal conditions (0.08SiO<sub>2</sub>:0.5TEAOH:0.7NH<sub>4</sub>F:8H<sub>2</sub>O) showed high PV performance with a separation factor of 229 and a flux of 0.62 kg·m<sup>−2</sup>·h<sup>−1</sup> for a 1 wt % n-butanol/water mixture at 318 K. This result was attributed to the hydrophobicity and large pore size of the pure-silica *BEA membrane. This was the first successful synthesis of hydrophobic large-pore zeolite membranes on tubular supports with alcohol selectivity, and the obtained results could provide new insights into the research on hydrophobic membranes with high permeability. |
| first_indexed | 2024-03-12T06:17:46Z |
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| institution | Directory Open Access Journal |
| issn | 2077-0375 |
| language | English |
| last_indexed | 2024-03-12T06:17:46Z |
| publishDate | 2019-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Membranes |
| spelling | doaj.art-7e1469f0ae614c268371c0a7ef1e59f92023-09-03T02:28:17ZengMDPI AGMembranes2077-03752019-07-01978610.3390/membranes9070086membranes9070086Hydrophobic *BEA-Type Zeolite Membranes on Tubular Silica Supports for Alcohol/Water Separation by PervaporationKyohei Ueno0Saki Yamada1Toshinari Watanabe2Hideyuki Negishi3Takuya Okuno4Hiromasa Tawarayama5Shinji Ishikawa6Manabu Miyamoto7Shigeyuki Uemiya8Yasunori Oumi9Department of Oral Biochemistry, Division of Oral Structure, Function and Development, Asahi University School of Dentistry, 1851 Hozumi, Mizuho, Gifu 501-0296, JapanGraduate School of Natural Science and Technology, Gifu University, 1-1 Yanagido, Gifu, Gifu 501-1193, JapanGraduate School of Engineering, Gifu University, 1-1 Yanagido, Gifu, Gifu 501-1193, JapanResearch Institute for Chemical Process Technology, National Institute of Advanced Industrial Science and Technology (AIST), AIST Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, JapanFrontier Technologies Laboratory, Sumitomo Electric Industries, Ltd., 1, Taya-cho, Sakae-ku, Yokohama, Kanagawa 244-8588, JapanFrontier Technologies Laboratory, Sumitomo Electric Industries, Ltd., 1, Taya-cho, Sakae-ku, Yokohama, Kanagawa 244-8588, JapanFrontier Technologies Laboratory, Sumitomo Electric Industries, Ltd., 1, Taya-cho, Sakae-ku, Yokohama, Kanagawa 244-8588, JapanFaculty of Engineering, Gifu University, 1-1 Yanagido, Gifu, Gifu 501-1193, JapanFaculty of Engineering, Gifu University, 1-1 Yanagido, Gifu, Gifu 501-1193, JapanOrganization for Research and Community Development, Gifu University, 1-1 Yanagido, Gifu, Gifu 501-1193, JapanHydrophobic pure-silica *BEA-type zeolite membranes with large pores were prepared on tubular silica supports by hydrothermal synthesis using a secondary growth method and were applied to the separation of alcohol/water mixtures by pervaporation (PV), an alternative energy-efficient process for production of biofuels. Amorphous pure-silica tubular silica supports, free of Al atoms, were used for preparing the membranes. In this study, the effects of the synthesis conditions, such as the H<sub>2</sub>O/SiO<sub>2</sub> and NH<sub>4</sub>F/SiO<sub>2</sub> ratios in the synthetic gel, on the membrane formation process and separation performance were systematically investigated. The successfully prepared dense and continuous membranes exhibited alcohol selectivity and high flux for the separation of ethanol/water and butanol/water mixtures. The pure-silica *BEA membranes obtained under optimal conditions (0.08SiO<sub>2</sub>:0.5TEAOH:0.7NH<sub>4</sub>F:8H<sub>2</sub>O) showed high PV performance with a separation factor of 229 and a flux of 0.62 kg·m<sup>−2</sup>·h<sup>−1</sup> for a 1 wt % n-butanol/water mixture at 318 K. This result was attributed to the hydrophobicity and large pore size of the pure-silica *BEA membrane. This was the first successful synthesis of hydrophobic large-pore zeolite membranes on tubular supports with alcohol selectivity, and the obtained results could provide new insights into the research on hydrophobic membranes with high permeability.https://www.mdpi.com/2077-0375/9/7/86*BEA-type zeolitehydrophobic zeolite membraneelectrophoretic depositiontubular silica supportsecondary growthhydrothermal synthesisethanolbutanolpervaporation separationalcohol selectivity |
| spellingShingle | Kyohei Ueno Saki Yamada Toshinari Watanabe Hideyuki Negishi Takuya Okuno Hiromasa Tawarayama Shinji Ishikawa Manabu Miyamoto Shigeyuki Uemiya Yasunori Oumi Hydrophobic *BEA-Type Zeolite Membranes on Tubular Silica Supports for Alcohol/Water Separation by Pervaporation Membranes *BEA-type zeolite hydrophobic zeolite membrane electrophoretic deposition tubular silica support secondary growth hydrothermal synthesis ethanol butanol pervaporation separation alcohol selectivity |
| title | Hydrophobic *BEA-Type Zeolite Membranes on Tubular Silica Supports for Alcohol/Water Separation by Pervaporation |
| title_full | Hydrophobic *BEA-Type Zeolite Membranes on Tubular Silica Supports for Alcohol/Water Separation by Pervaporation |
| title_fullStr | Hydrophobic *BEA-Type Zeolite Membranes on Tubular Silica Supports for Alcohol/Water Separation by Pervaporation |
| title_full_unstemmed | Hydrophobic *BEA-Type Zeolite Membranes on Tubular Silica Supports for Alcohol/Water Separation by Pervaporation |
| title_short | Hydrophobic *BEA-Type Zeolite Membranes on Tubular Silica Supports for Alcohol/Water Separation by Pervaporation |
| title_sort | hydrophobic bea type zeolite membranes on tubular silica supports for alcohol water separation by pervaporation |
| topic | *BEA-type zeolite hydrophobic zeolite membrane electrophoretic deposition tubular silica support secondary growth hydrothermal synthesis ethanol butanol pervaporation separation alcohol selectivity |
| url | https://www.mdpi.com/2077-0375/9/7/86 |
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