Activity pattern of low-loaded FeOχ/SiO2 catalysts in the selective oxidation of C1 and C3 alkanes with oxygen
Articolo
Data di Pubblicazione:
2006
Abstract:
The structure and redox properties of low-loaded (0.015–0.73 wt% Fe) FeOx/SiO2 catalysts obtained by adsorption–precipitation of Fe2+ were
probed by Mo¨ssbasuer and TPR techniques. Oxide dispersion data, obtained by deconvolution of Mo¨ssbasuer and TPR spectra, signal the
speciation of the active phase into ‘‘isolated’’ FeOx sites, ‘‘2-d FeOx patches’’ and ‘‘3-d Fe2O3 clusters’’. The reactivity of FeOx/SiO2 catalysts in
the selective oxidation of CH4 and C3H8 in the range 475–650 8C has been assessed. Basic relationships amongst dispersion, specific rate of alkane
conversion and product formation signal that the selective oxidation functionality depends upon local environment and oxygen bond strength of
active sites, their distribution being closely related to the efficiency of synthesis route.
Tipologia CRIS:
03A-Articolo su Rivista
Keywords:
FeOx/SiO2 catalysts; Light paraffins; Preparation method; Selective oxidation; Dispersion
Elenco autori:
ARENA F; GATTI G; STIEVANO L; MARTRA G; COLUCCIA S; FRUSTERI F; SPADARO L; PARMALIANA A
Link alla scheda completa:
Pubblicato in: