Effects of hydrothermal parameters on the synthesis of nanocrystalline zeolite NaY
Nouri, Amir (Iran University of Science and Technology. Research Centre for Membrane Separation Processes)
Mostafa, Jafari (Iran University of Science and Technology. Research Centre for Membrane Separation Processes)
Mansour, Kazemimoghadam (Iran University of Science and Technology. Research Centre for Membrane Separation Processes)
Toraj, Mohammadi (Iran University of Science and Technology. Research Centre for Membrane Separation Processes)

Fecha:	2012
Resumen:	Synthesized zeolites are extremely important as industrial minerals and are most commonly prepared using organic templates. Because these organic templates present undesirable environmental hazards, a synthesis method which avoids their use is desirable. The objective of the current study was to develop such a synthesis method. Zeolite NaY was synthesized hydrothermally starting from a mixture of 1. 0 AlO:10 SiO:4. 6 NaO:180 HO molar gel composition, without adding any organic additives. Experiments were carried out to investigate the effects of molar compositions including water content (HO/SiO), crystallization conditions including temperature, and time on the crystal size and yield of NaY-type zeolite. The results showed that increasing the crystallization time from 5 to 12 h increased the crystal size, while increasing the crystallization temperature from 80 to 100°C also increased crystallinity. The crystal species of zeolite NaY were characterized by X-ray diffraction, X-ray fluorescence, and scanning electron microscopy analysis. Zeolite NaY crystals in the size range 25 150 nm were synthesized successfully over a period of 8 h at 100°C.
Derechos:	Aquest material està protegit per drets d'autor i/o drets afins. Podeu utilitzar aquest material en funció del que permet la legislació de drets d'autor i drets afins d'aplicació al vostre cas. Per a d'altres usos heu d'obtenir permís del(s) titular(s) de drets.
Lengua:	Anglès
Documento:	Article ; recerca ; Versió publicada
Materia:	Crystallinity ; Hydrothermal ; Nanocrystal ; Zeolite nay
Publicado en:	Clays and Clay Minerals, Vol. 60, Núm. 6 (2012) , p. 610-615, ISSN 1552-8367

DOI: 10.1346/CCMN.2012.0600606

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