Synthesis of hydrophobic siliceous ferrierite by using pyridine and sodium fluoride

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• 作者：Yoshihiro Kamimura ; Chrispin Kowenje ; Kenji Yamanaka ; Keiji Itabashi ; Akira Endo ; Tatsuya Okubo
• 关键词：Zeolite synthesis ; Ferrierite ; Fluoride media ; Water adsorption ; Hydrophobicity
• 刊名：Microporous and Mesoporous Materials
• 出版年：2013
• 出版时间：15 November, 2013
• 年：2013
• 卷：181
• 期：Complete
• 页码：154-159
• 全文大小：1060 K

文摘

We report for the first time, the successful synthesis of siliceous ferrierites with SiO₂/Al₂O₃ = 138.8-324 by the hydrothermal treatment of aluminosilicate gel with the introduction of pyridine and easy-to-handle sodium fluoride (NaF). It has been found that pure siliceous ferrierites exhibit well-defined plate-like morphologies with sufficient micropore volume. Moreover, in terms of the adsorption of water vapor, siliceous ferrierites (SiO₂/Al₂O₃ ? 208) exhibit significantly higher hydrophobicity than commercially available siliceous zeolite (ZSM-5, HSZ-890HOA, SiO₂/Al₂O₃ = 1880). This work provides a promising approach for the preparation of siliceous ferrierites with a simple synthesis system, and this finding will help to broaden the practical applicability of ferrierites.