OXIDATIVE DEHYDROGENATION OF PROPANE OVER FLUORINE PROMOTED RARE EARTH-BASED CATALYSTS

Catalysts based on rare earth complexes such as CeO2/2CeF3, Sm2O3/4CeF 3, Nd2O3/4CeF3 and Y2O3/4CeF3 were prepared. These catalysts were acti ve for the oxidative dehydrogenation of propane with very high selecti vity to propene. At 500-degrees-C and 6000 h-1, using CeO2/2CeF3 as th e catalyst, the conversion of propane was 41.3%, selectivity to propen e reached 81.1%, propene yield was 33.5%. XRD results indicated that F - and O2- were exchanged in the lattices. Raman spectra showed that th e O2- might be the active oxygen species in propane oxidative dehydrog enation.