Metathesis of butene to propene and pentene over WO3/MTS-9

A WO3/MTS-9 catalyst for metathesis of butene to propene and pentene was prepared by supporting tungsten oxide on MTS-9. The prepared catalyst was characterized by a number of experimental techniques including XRD, nitrogen adsorption, NH3-TPD, H-2-TPR, UV-DRS and UV-Raman, The characterization data showed that three types of tungsten species (tetrahedral, octahedral polytungstate species and WO3 crystallites) are present on the catalyst. In the case of butene metathesis, the performance of WO3/MTS-9 was tested. On the base of experiment results, we speculated that the tetrahedral and the octahedral polytungstate species may be the active sites rather than crystalline WO3. (C) 2011 Elsevier Inc. All rights reserved.