(744e) Oxidative Dehydrogenation of Propane By Metal-Loaded Mesoporous Membranes

Oxidative Dehydrogenation of Propane By Metal-Loaded Mesoporous Membranes

Abstract:

The catalytic performance of V
and/or Pd-containing high-surface mesoporous
siliceous materials (TUD-1) membranes in oxidative dehydrogenation of propane is
investigated. Catalysts were prepared by anchoring of mesoporous TUD-1
mesoporous silica on alumina tubes by hydrothermal synthesis procedures.
Catalytic reactions were performed on automatic gas phase reactor purchased
from PID, Spain. The reactions were followed by online GC analysis. The effect
of TUD-1 texture and the nature of metal loaded on the catalytic performance of
the membrane catalyst are explored. Prepared catalysts were characterized by
XRF for determination of metal content, XRD, SEM and N₂-adsorption
for study of morphology and texture, and H₂-TPR and DR UV?vis spectroscopy. All prepared materials were tested in propane
oxidative dehydrogenation (ODH) at 550 ◦C and the obtained catalytic
results were correlated with their structural and surface characteristics. Results
obtained revealed that the structure of mesoporous silica support plays crucial
role in propane ODH reaction. The catalytic performance of investigated
materials in C3-ODH can be correlated with population
of all tetrahedrally coordinated metals and only isolated monomeric MOx complexes, respectively.