Catalysis Letters, Vol.82, No.3-4, 243-247, 2002
VOPO4 center dot 2H(2)O and Fe(H2O)(x)(VO)(1-x)PO(4 center dot)2H(2)O supported on TiO2 as catalysts for oxidative dehydrogenation of ethane
The effect of iron substitution on bulk and TiO2-supported VOPO4.2H(2)O on the catalytic performances in oxidative dehydrogenation of ethane has been studied in a fixed-bed reactor at 550degreesC. The samples have been characterized by XRD, BET measurements, TPR and ammonia TPD experiments. A uniform dispersion of the active phase on the support has been obtained. Both iron substitution and dispersion on TiO2 significantly modify redox and acid properties of vanadyl orthophosphate. A good correlation between the acid and redox properties of the catalysts and their catalytic performances has been observed.