Affordable Access

Publisher Website

Catalytic oxidative dehydrogenation of propane over Mg–V/Mo oxides

Authors
Journal
Journal of Catalysis
0021-9517
Publisher
Elsevier
Publication Date
Volume
223
Issue
2
Identifiers
DOI: 10.1016/j.jcat.2004.01.023
Keywords
  • Propane
  • Oxidative Dehydrogenation
  • Odh
  • Magnesium
  • Vanadium
  • And Molybdenum Oxides
  • Raman Spectroscopy
Disciplines
  • Chemistry

Abstract

Abstract Fifteen distinct MgOV 2O 5, MgOMoO 3, MgOV 2O 5MoO 3, and V 2O 5MoO 3 compositions were prepared using sol–gel chemistry and their selectivities and conversions for propane oxidative dehydrogenation (ODH) to propylene were measured. The vanadates were more active than the molybdates at lower temperatures; however, the molybdates exhibited higher selectivities at similar conversions. An increase in both ODH conversion and selectivity with molybdenum substitution on vanadium sites was also observed. These results demonstrate the importance of the bulk structure on the ODH reaction. In general, propylene selectivities increased with increasing conversions at temperatures above 673 K when oxygen depletion in the reactant stream occurred. Visible and UV Raman spectroscopy corroborates this result and helps focus attention on critical surface-specific information. A new Raman peak was observed for the partially reduced MgMoO 4 and is associated with a three-coordinate surface oxygen.

There are no comments yet on this publication. Be the first to share your thoughts.