Optimizing the Template Free Fabrication Approach for Synthesis of ZSM-5 Nanozeolite

Document Type : Research Article

Authors

Chemistry Department, Faculty of Science, Imam Khomeini International University, Qazvin, I.R. IRAN

Abstract

In this study, nanosized ZSM-5 zeolite was synthesized for examining of optimum conditions of synthesis and the formation of zeolite ZSM-5 under different conditions based on two-level factorial experimental design, by hydrothermal method. Samples were synthesized without organic template and different conditions including the molar composition of the synthetic gel and reaction time were studied in a wide range. Then the samples for studying the formation of zeolite ZSM-5 were analyzed by X-ray diffraction and the results were compared with each other to obtain optimal conditions. Purpose of optimizing the assay was to achieve nanosized ZSM-5 zeolite with appropriate morphology and stability. Characterization of nanoparticles was performed by the Scanning electron microscope, Transmission electron microscope Fourier transform infrared spectroscopy and thermal gravimetric analysis. According to the two-level factorial experiment design, optimal conditions for the synthesis of nano-zeolite ZSM-5 include: Na2O/SiO2=0.2،SiO2/Al2O3 =60 ،H2O/SiO2=53, Aging time=72h. Scanning electron microscopy showed that the smallest and the most optimal of particle size is approximately 44 nm and Fourier-transform infrared spectroscopy and Thermal gravimetric analysis confirmed the synthesis of nano-zeolite ZSM-5.

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References

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