Effect of reaction temperature on Fe¨CAl analcime formation
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- 作者：Kazuko Katsuki ; Hidenori Suzuki ; Masatoshi Hasegawa ; Michiko Heike ; Noriko Hosomachi ; Yuya Yamashita and Yuta Nakamura
- 关键词：Zeolites ; Fe– ; Al analcime ; Gismondine ; Faujasite
- 刊名：Journal of Porous Materials
- 出版年：2007
- 出版时间：December, 2007
- 年：2007
- 卷：14
- 期：4
- 页码：443-448
- 全文大小：210 KB
文摘
The effects of reaction period, temperature, and iron species on the zeolite framework type were studied in this work. Gismondine (GIS) is usually synthesized by hydrothermal method at 80¡ãC from sodium metasilicate and aluminum nitrate as starting materials preferentially independent of the presence/absence of iron source. However, the present work revealed that pure analcime (ANA) could be formed at temperatures more than 120¡ãC. A large polyhedral ANA crystal with a diameter of 180 ¦Ìm was obtained even at a comparatively low temperature such as 150¡ãC at a short reaction period of 1 week. The presence of iron source promoted the formation of pure ANA. Infrared spectroscopy, X-ray diffraction, and ICP-OES analysis suggested that the iron component added as a reactant was incorporated into the ANA framework through the isomorphous substitution for Al.