In Situ Synthesis of Zeolite NaKL In Highly-Enriched Spinel Matrix

Shi Ling Guo; Zi Yang Yu; Yi Liang Chen; Xin Xing Chen

doi:10.4028/www.scientific.net/AMR.236-238.1045

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 236-238In Situ Synthesis of Zeolite NaKL In...

In Situ Synthesis of Zeolite NaKL In Highly-Enriched Spinel Matrix

Abstract:

Zeolite NaKL was in-situ crystallized under static condition with kaolin microspheres calcined at 980 °C as silicon and aluminium sources. Influences of hydrothermal synthesis conditions such as the mole ratio of n(K₂O)/n(Na₂O), n(OH^-)/n(SiO₂) and crystallizaion time on crystallization of zeolite L were studied in detail. The crystal phase and morphology of the as-prepared zeolite samples were characterized by X-ray diffraction (XRD) and scanning electronic microscopy (SEM). The results showed that the as-synthesized samples owned characteristic peaks of zeolite L with high crystallinity and were covered uniformly by regular crystal of zeolite L on its kaolin microsphere surface , which maintained complete ball shape as before. The optimum conditions to get zeolite NaKL with high crystallinity by this method were found to be the mole ratio of n(K₂O)/n(Na₂O) =7:3 and n(OH^-)/n(SiO₂) =0.50 in the reaction mixture, an aging of the reactants at room temperature for 30 h and crystallization temperature 120 °C for 24 h.

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Periodical:

Advanced Materials Research (Volumes 236-238)

Pages:

1045-1048

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.236-238.1045

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Online since:

May 2011

Authors:

Shi Ling Guo, Zi Yang Yu, Yi Liang Chen, Xin Xing Chen

Keywords:

Crystallization, In Situ, NaKL, Spinel, Zeolite

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