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The Synthesis of Monodisperse MFI Nanozeolites: Controlling the Crystallization Process

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Abstract

The sinthesis conditions of a series of monodisperse crystals of ZSM-5 zeolite, silicalite-1, and Fe-silicalite-1 with an average particle size in the range of 30 to 450 nm have been determined. The kinetic features of the silicalite-1 crystallization at low temperatures (60−90°C) and atmospheric pressure have been studied. The effective activation energies of silicalite-1 nucliation and crystal growth have been determined to be 95 ± 7 and 100 ± 7 kJ/mol, respectively. The influence of the synthesis time and temperature as well as the silicon source concentration on the size of the MFI type nanocrystals has been studied.

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ACKNOWLEDGMENTS

The authors are grateful to N.A. Alekseeva for carrying out the X-ray diffraction analysis of the samples.

Funding

This work was supported by Ministry of Science and Higher Education of the Russian Federation (project AAAA-A17-117041710077-4).

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Correspondence to K. A. Sashkina.

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Translated by E. Boltukhina

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Sashkina, K.A., Shestakova, D.O. & Parkhomchuk, E.V. The Synthesis of Monodisperse MFI Nanozeolites: Controlling the Crystallization Process. Pet. Chem. 60, 881–889 (2020). https://doi.org/10.1134/S0965544120080137

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  • DOI: https://doi.org/10.1134/S0965544120080137

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