Metathesis of butene to propene on WO3 supported on MTS-9 titanium-silica: effect of loading on selectivity of product and yield of propene

Abstract

An advanced heterogeneous catalyst for olefin disproportion was prepared by supporting WO3 on titanium-silica sieve (MTS-9). The nature of the surface tungsten oxide species present in these catalysts was determined as a function of tungsten oxide loading by X-ray diffraction (XRD), ultraviolet–visible diffuse reflectance spectra (UV–DRS) and ultraviolet–visible Raman (UV-Raman). The catalyst showed high activity for the metathesis of butene to propene. The active centers are not crystallites of WO3 but rather surface tungsten oxide species. The conversion of butene varies with the degree of catalyst loading.