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Effect of Dispersion of the Active Phase on the Activity and Coke Formation over WO3/SiO2 Catalysts in the Metathesis of Ethylene and 2-Butene

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Abstract

WO3/SiO2 catalysts with various tungsten loadings were prepared by the incipient wetness impregnation method and studied in the metathesis of ethylene and trans-2-butene as feed to produce propylene. Two different calcination methods were used to modify the dispersion of the tungsten active phase. The catalysts were characterized by X-ray diffraction, transmission electron microscopy, nitrogen physisorption, ion-exchange titration, FT-Raman, ammonia temperature programmed desorption and temperature programmed oxidation. Better dispersion is obtained from low heating rate calcination. The dispersion of tungsten showed a direct effect on coke formation and was the key factor to improve the stability of the catalysts.

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Acknowledgments

The financial supports from the Thailand Research Fund (TRF) and the Office of Higher Education Commission are gratefully acknowledged. The authors would like to thank the Royal Golden Jubilee PhD Scholarship from TRF and SCG Chemicals for Narongrat Poovarawan.

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Correspondence to Piyasan Praserthdam.

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Poovarawan, N., Suriye, K., Panpranot, J. et al. Effect of Dispersion of the Active Phase on the Activity and Coke Formation over WO3/SiO2 Catalysts in the Metathesis of Ethylene and 2-Butene. Catal Lett 145, 1868–1875 (2015). https://doi.org/10.1007/s10562-015-1579-3

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  • DOI: https://doi.org/10.1007/s10562-015-1579-3

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