In situ studies of the Mars van Krevelen mechanism in hydrocarbon oxidation. Conference Paper

abstract

• Metal oxide-catalyzed selective oxidations follow the Mars van Krevelen mechanism. The organic reactant is oxidized by lattice oxide ions at the surface; these are replenished by dioxygen dissociation with surface and solid state diffusion to reoxidize surface sites. Studies using a flow microbalance reactor to examine butane oxidation by vanadyl pyrophosphate catalysts have determined the kinetics of catalyst reduction and reoxidation in the Mars van Krevelen scheme. Oxygen removal from the lattice is too slow to account for the overall reaction rate. The Mars van Krevelen mechanism using catalyst lattice oxygen can account for only about 5% of the total oxidation activity. VPO catalysts for butane oxidation and Bi-Mo oxide catalysts for propylene oxidation use lattice oxygen to much different extents, providing useful tests of microbalance-based mechanistic studies. This is an abstract of a paper presented at the 228th ACS National Meeting (Philadelphia, PA 8/22-26/2004).

authors

• Barteau, Mark

published proceedings

• ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY

author list (cited authors)

• Barteau, M. A., Wang, D., & Lopez, L.

complete list of authors

• Barteau, MA||Wang, D||Lopez, L

publication date

• January 2004

published in

• ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY  Journal

start page

• U460

end page

• U460

volume

• 228

issue

• 1