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Synthesis of an NaY zeolite molecular sieve from a kaolin/dimethyl sulfoxide intercalation composite

Published online by Cambridge University Press:  11 June 2021

Shu-Qin Zheng*
Affiliation:
Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang414006, Hunan, China Hunan Province Key Laboratory of Speciality Petrochemicals Catalysis and Separation, Yueyang414006, Hunan, China
Ou Chen
Affiliation:
Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang414006, Hunan, China
Si-Cheng Liu
Affiliation:
Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang414006, Hunan, China
An Li
Affiliation:
Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang414006, Hunan, China Hunan Province Key Laboratory of Speciality Petrochemicals Catalysis and Separation, Yueyang414006, Hunan, China
Li-Jun Li
Affiliation:
Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang414006, Hunan, China Hunan Province Key Laboratory of Speciality Petrochemicals Catalysis and Separation, Yueyang414006, Hunan, China
Yong-Bing Yuan
Affiliation:
Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang414006, Hunan, China Hunan Province Key Laboratory of Speciality Petrochemicals Catalysis and Separation, Yueyang414006, Hunan, China
Ceng Zhang
Affiliation:
Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang414006, Hunan, China Hunan Province Key Laboratory of Speciality Petrochemicals Catalysis and Separation, Yueyang414006, Hunan, China

Abstract

NaY zeolite was synthesized from kaolin/dimethyl sulfoxide (DMSO) intercalation composites using an in situ crystallization technique. The effects of the intercalation ratios and the amounts of the kaolin/DMSO intercalation composite on the synthesis of an NaY zeolite molecular sieve were studied. The samples were characterized by X-ray diffraction, Fourier-transform infrared spectroscopy, differential thermal analysis, N2 adsorption–desorption and scanning electron microscopy. In the in situ synthesis system, when the kaolin/DMSO intercalation composite was added, pure NaY zeolite was formed. By increasing the amount of kaolin/DMSO intercalation composite added, the crystallinity of the samples increased, and after reaching the maximum amount of kaolin/DMSO intercalation composite added, the crystallinity decreased with further increases of the amount of kaolin/DMSO intercalation composite added. To higher intercalation ratio, the crystallinity can be greatly improved at the lower addition content. At an intercalation ratio of 84%, the added amount of kaolin/DMSO intercalation composite was 2.5% and the crystallinity of the NaY zeolite molecular sieve reached a maximum value of 45%. At intercalation ratios of 55% and 22%, the amount of kaolin/DMSO intercalation composite added was 15% and the crystallinities of the NaY zeolite molecular sieves were 44% and 47%, respectively. The NaY zeolite has good thermal stability and a particle diameter of ~0.5 μm. The Brunauer–Emmett–Teller (BET) specific surface area and pore volume of the sample were 519 m2 g–1 and 0.355 cm3 g–1, respectively.

Type
Article
Copyright
Copyright © The Author(s), 2021. Published by Cambridge University Press on behalf of The Mineralogical Society of Great Britain and Ireland

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Footnotes

Associate Editor: Saverio Fiore

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