Synthesis and Characterization of Small Crystals NaY Zeolite with High Silicon

Abstract:

Small crystals NaY zeolite with high silicon was successfully synthesized via a two-stage temperature crystallization program, without adding any organic additives. While the effect of low temperature crystallization time and the alkalinity on the crystal size and SiO₂/Al₂O₃ ratio of NaY zeolite were investigated. The as-synthesized samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier Transform Infrared (FT-IR) spectroscopy, N₂ adsorption, 29Si MAS NMR and thermogravimetric TG measurements. NaY zeolite, with crystal size about 100 nm and SiO₂/Al₂O₃ ratio about 5.3, is obtained. It possesses high surface area and some amount of mecropores, and the decomposition temperature is higher than 1000 °C. The crystal size and SiO₂/Al₂O₃ ratio of as-synthesized NaY zeolite depend on low temperature crystallization time and the alkalinity.

• Periodical: Advanced Materials Research (Volumes 554-556)
• Pages: 81-88
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.554-556.81
• Online since: July 2012
• Authors: Qing Yan Cui, Ya Song Zhou, Qiang Wei
• Keywords: Crystallization, High Silicon, NaY Zeolite, Small Crystals, Synthesis

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