Propylene Self-Metathesis to Ethylene and Butene over WOx/SiO2, Effect of Nano-Sized Extra Supports (SiO2 and TiO2)
Propylene self-metathesis to ethylene and butene was
studied over WOx/SiO2 catalysts at 450oC and atmospheric pressure.
The WOx/SiO2 catalysts were prepared by incipient wetness
impregnation of ammonium metatungstate aqueous solution. It was
found that, adding nano-sized extra supports (SiO2 and TiO2) by
physical mixing with the WOx/SiO2 enhanced propylene conversion.
The UV-Vis and FT-Raman results revealed that WOx could migrate
from the original silica support to the extra support, leading to a
better dispersion of WOx. The ICP-OES results also indicate that
WOx existed on the extra support. Coke formation was investigated
on the catalysts after 10 h time-on-stream by TPO. However, adding
nano-sized extra supports led to higher coke formation which may be
related to acidity as characterized by NH3-TPD.
[1] Huang, S., et al., Metathesis of ethene and 2-butene to propene on
W/Al2O3–HY catalysts with different HY contents, Journal of Molecular
Catalysis A: Chemical, vol. 226, pp.61-68, 2005.
[2] Spamer, A., et al., The reduction of isomerisation activity on a
WO3/SiO2 metathesis catalyst, Applied Catalysis A: General, vol. 255,
pp.153-167, 2003.
[3] Zhao, Q., et al., Effect of tungsten oxide loading on metathesis activity
of ethene and 2-butene over WO3/SiO2 catalysts, Transition Metal
Chemistry, vol. 34, pp.621-627, 2009.
[4] Chaemchuen, S., et al., The structure-reactivity relationship for
metathesis reaction between ethylene and 2-butene on WO3/SiO2
catalysts calcinated at different temperatures, Kinetics and Catalysis,
vol. 53, pp.247-252, 2012.
[5] Spamer, A., et al., Application of a WO3/SiO2 catalyst in an industrial
environment: part II, Applied Catalysis A: General, vol. 255, pp.133-
142, 2003.
[6] Lee, E.L. and I.E. Wachs, In Situ Spectroscopic Investigation of the
Molecular and Electronic Structures of SiO2 Supported Surface Metal
Oxides, The Journal of Physical Chemistry C, vol. 111, pp.14410-14425,
2007.
[7] Ross-Medgaarden, E.I. and I.E. Wachs, Structural Determination of
Bulk and Surface Tungsten Oxides with UV−vis Diffuse Reflectance
Spectroscopy and Raman Spectroscopy, The Journal of Physical
Chemistry C, vol. 111, pp.15089-15099, 2007.
[8] Limsangkass, W., et al., Influence of micro- and nano-sized SiO2 excess
support on the metathesis of ethylene and trans-2-butene to propylene
over silica-supported tungsten catalysts, Reaction Kinetics, Mechanisms
and Catalysis, vol. 113, pp.225-240, 2014.
[9] Haber, J., T. Machej, and T. Czeppe, The phenomenon of wetting at
solid/solid interface, Surface Science, vol. 151, pp.301-310, 1985.
[10] Cruz, J.S.d., et al., Thermal spreading of WO3 onto zirconia support,
Applied Surface Science, vol. 253, pp.3160-3167, 2007.
[11] Debecker, D.P., et al., Facile preparation of MoO3/SiO2-Al2O3 olefin
metathesis catalysts by thermal spreading, in Studies in Surface Science
and Catalysis, M.D.S.H.P.A.J.J.A.M. E.M. Gaigneaux and P. Ruiz,
Editors. 2010, Elsevier. p. 581-585.
[12] Hoang, V.V. Molecular Dynamics Simulation of Amorphous SiO2
Nanoparticles., The Journal of Physical Chemistry B, vol. 111,
pp.12649-12656, 2007.
[13] Navrotsky, A., Energetics of nanoparticle oxides: interplay between
surface energy and polymorphism. 2003, Geochem. Trans. p. 34–37.
[14] Koch, C., Nanostructured Materials: Processing, Properties, and
Applications. 2nd ed. 2007.
[15] Huang, S., et al., The effect of calcination time on the activity of
WO3/Al2O3/HY catalysts for the metathesis reaction between ethene and
2-butene, Applied Catalysis A: General, vol. 323, pp.94-103, 2007.
[16] Liu, H., et al., Production of propene from 1-butene metathesis reaction
on tungsten based heterogeneous catalysts, Journal of Natural Gas
Chemistry, vol. 18, pp.331-336, 2009.
[17] Moodley, D.J., The metathesis activity and deactivation of
heterogeneous metal oxide catalystic sytems. 2003: North-West
University, Potchefstroom Campus.
[1] Huang, S., et al., Metathesis of ethene and 2-butene to propene on
W/Al2O3–HY catalysts with different HY contents, Journal of Molecular
Catalysis A: Chemical, vol. 226, pp.61-68, 2005.
[2] Spamer, A., et al., The reduction of isomerisation activity on a
WO3/SiO2 metathesis catalyst, Applied Catalysis A: General, vol. 255,
pp.153-167, 2003.
[3] Zhao, Q., et al., Effect of tungsten oxide loading on metathesis activity
of ethene and 2-butene over WO3/SiO2 catalysts, Transition Metal
Chemistry, vol. 34, pp.621-627, 2009.
[4] Chaemchuen, S., et al., The structure-reactivity relationship for
metathesis reaction between ethylene and 2-butene on WO3/SiO2
catalysts calcinated at different temperatures, Kinetics and Catalysis,
vol. 53, pp.247-252, 2012.
[5] Spamer, A., et al., Application of a WO3/SiO2 catalyst in an industrial
environment: part II, Applied Catalysis A: General, vol. 255, pp.133-
142, 2003.
[6] Lee, E.L. and I.E. Wachs, In Situ Spectroscopic Investigation of the
Molecular and Electronic Structures of SiO2 Supported Surface Metal
Oxides, The Journal of Physical Chemistry C, vol. 111, pp.14410-14425,
2007.
[7] Ross-Medgaarden, E.I. and I.E. Wachs, Structural Determination of
Bulk and Surface Tungsten Oxides with UV−vis Diffuse Reflectance
Spectroscopy and Raman Spectroscopy, The Journal of Physical
Chemistry C, vol. 111, pp.15089-15099, 2007.
[8] Limsangkass, W., et al., Influence of micro- and nano-sized SiO2 excess
support on the metathesis of ethylene and trans-2-butene to propylene
over silica-supported tungsten catalysts, Reaction Kinetics, Mechanisms
and Catalysis, vol. 113, pp.225-240, 2014.
[9] Haber, J., T. Machej, and T. Czeppe, The phenomenon of wetting at
solid/solid interface, Surface Science, vol. 151, pp.301-310, 1985.
[10] Cruz, J.S.d., et al., Thermal spreading of WO3 onto zirconia support,
Applied Surface Science, vol. 253, pp.3160-3167, 2007.
[11] Debecker, D.P., et al., Facile preparation of MoO3/SiO2-Al2O3 olefin
metathesis catalysts by thermal spreading, in Studies in Surface Science
and Catalysis, M.D.S.H.P.A.J.J.A.M. E.M. Gaigneaux and P. Ruiz,
Editors. 2010, Elsevier. p. 581-585.
[12] Hoang, V.V. Molecular Dynamics Simulation of Amorphous SiO2
Nanoparticles., The Journal of Physical Chemistry B, vol. 111,
pp.12649-12656, 2007.
[13] Navrotsky, A., Energetics of nanoparticle oxides: interplay between
surface energy and polymorphism. 2003, Geochem. Trans. p. 34–37.
[14] Koch, C., Nanostructured Materials: Processing, Properties, and
Applications. 2nd ed. 2007.
[15] Huang, S., et al., The effect of calcination time on the activity of
WO3/Al2O3/HY catalysts for the metathesis reaction between ethene and
2-butene, Applied Catalysis A: General, vol. 323, pp.94-103, 2007.
[16] Liu, H., et al., Production of propene from 1-butene metathesis reaction
on tungsten based heterogeneous catalysts, Journal of Natural Gas
Chemistry, vol. 18, pp.331-336, 2009.
[17] Moodley, D.J., The metathesis activity and deactivation of
heterogeneous metal oxide catalystic sytems. 2003: North-West
University, Potchefstroom Campus.
@article{"International Journal of Earth, Energy and Environmental Sciences:69775", author = "A.Guntida and K. Suriye and S. Kunjara Na Ayudhya and J. Panpranot and P. Praserthdam", title = "Propylene Self-Metathesis to Ethylene and Butene over WOx/SiO2, Effect of Nano-Sized Extra Supports (SiO2 and TiO2)", abstract = "Propylene self-metathesis to ethylene and butene was
studied over WOx/SiO2 catalysts at 450oC and atmospheric pressure.
The WOx/SiO2 catalysts were prepared by incipient wetness
impregnation of ammonium metatungstate aqueous solution. It was
found that, adding nano-sized extra supports (SiO2 and TiO2) by
physical mixing with the WOx/SiO2 enhanced propylene conversion.
The UV-Vis and FT-Raman results revealed that WOx could migrate
from the original silica support to the extra support, leading to a
better dispersion of WOx. The ICP-OES results also indicate that
WOx existed on the extra support. Coke formation was investigated
on the catalysts after 10 h time-on-stream by TPO. However, adding
nano-sized extra supports led to higher coke formation which may be
related to acidity as characterized by NH3-TPD.
", keywords = "Extra support, nanomaterial, propylene self-metathesis,
tungsten oxide.", volume = "9", number = "5", pages = "479-4", }
