Abstract
Pure 2 % trans-2-butene and the mixture of 1 % cis- and 1 % trans-2-butene were used as feed to react with ethylene in metathesis reaction in order to produce propylene to study the effect of feed on WO3/SiO2 catalysts with various tungsten oxide loadings (5, 7, 9, and 11 wt%), which were prepared by incipient wetness impregnation. These catalysts were characterized by X-ray diffraction, nitrogen adsorption (BET), scanning electron microscopy, energy dispersive X-ray spectroscopy, ion-exchange titration, FT-Raman, ammonia temperature programmed desorption (NH3-TPD) and reactant-TPD. At high tungsten oxide loading, when the mixture of cis- and trans-2-butene was used as the reaction feed the conversion of 2-butene was lower than when pure trans-2-butene was used. However, the effect of cis-2-butene isomer on the conversion of 2-butene was less pronounced at low tungsten oxide loading. The dispersion of tungsten was a key factor to improve the activity of the tungsten catalysts when the mixture of cis- and trans-2-butene was used as a feed for metathesis reaction.
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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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Poovarawan, N., Suriye, K., Ayudhya, S.K.N. et al. Effect of 2-Butene Cis/Trans Isomers in the Metathesis of Ethylene and 2-Butene Over WO3/SiO2 Catalysts. Catal Lett 144, 920–927 (2014). https://doi.org/10.1007/s10562-014-1230-8
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DOI: https://doi.org/10.1007/s10562-014-1230-8