@article{(Open Science Index):https://publications.waset.org/pdf/10001244, title = {Propylene Self-Metathesis to Ethylene and Butene over WOx/SiO2, Effect of Nano-Sized Extra Supports (SiO2 and TiO2)}, author = {A.Guntida and K. Suriye and S. Kunjara Na Ayudhya and J. Panpranot and P. Praserthdam}, country = {}, institution = {}, 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. }, journal = {International Journal of Chemical and Molecular Engineering}, volume = {9}, number = {5}, year = {2015}, pages = {487 - 490}, ee = {https://publications.waset.org/pdf/10001244}, url = {https://publications.waset.org/vol/101}, bibsource = {https://publications.waset.org/}, issn = {eISSN: 1307-6892}, publisher = {World Academy of Science, Engineering and Technology}, index = {Open Science Index 101, 2015}, }