IN-SITU LASER RAMAN-SPECTROSCOPY DURING SEQUENTIAL OXIDIZING AND REDUCING CONDITIONS FOR A VANADIUM-PHOSPHORUS-OXIDE CATALYST

Authors
SOEJARTO AD COULSTON GW SCHRADER GL
Citation
Ad. Soejarto et al., IN-SITU LASER RAMAN-SPECTROSCOPY DURING SEQUENTIAL OXIDIZING AND REDUCING CONDITIONS FOR A VANADIUM-PHOSPHORUS-OXIDE CATALYST, Canadian journal of chemical engineering, 74(5), 1996, pp. 594-599
Citations number
16
Categorie Soggetti
Engineering, Chemical
Journal title
Canadian journal of chemical engineering → ACNP
ISSN journal
00084034
Volume
74
Issue
5
Year of publication
1996
Pages
594 - 599
Database
ISI
SICI code
0008-4034(1996)74:5<594:ILRDSO>2.0.ZU;2-I
Abstract
A VPO catalyst prepared in an organic medium has been studied by in si tu laser Raman spectroscopy for n-butane oxidation to maleic anhydride . Data could be obtained at low laser power and brief collection times . Raman characterization during continuous flow (steady-state) studies revealed that (VO)(2)P2O7 was present. Sequential oxidizing (10% O-2 in N-2) and reducing (2% n-butane in N-2) conditions were explored at 350 degrees 0 and 400 degrees 0. These cycling (unsteady-state) operat ions revealed that formation of V(5(+)) phases was enhanced during oxi dizing conditions. The intensity of Raman bands due to (YO)(2)P2O7 inc reased during reducing conditions.