Influence of aluminium source on the crystal structure and framework coordination of Al and Si in fly ash-based zeolite NaA

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• 关键词：Fly ash ; Fused fly ash extract ; Zeolite NaA ; Crystal size ; Crystallinity ; Tetrahedral
• 刊名：Powder Technology
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：306
• 期：Complete
• 页码：17-25
• 全文大小：1748 K
• 卷排序：306

文摘

Synthesis of fly ash-based zeolite NaA using two aluminium sources is studied. The aluminium sources give rise to different Al and Si arrangement in the zeolite structure. Formation of both tetrahedral and distorted coordination is obtained from synthesis mixture with low Si/Al ratio. Crystal growth is a function of the synthesis Si/Al ratio. Crystal size is correlated with crystallinity and Si NMR peak width and area.