Novel F–$ V_{2} %$ O_{5} $/$ SiO_{2} $ catalysts for oxidative dehydrogenation of propane

Abstract The $ V_{2} %$ O_{5} $/$ SiO_{2} $ catalysts promoted by fluoride anion and prepared with different F adding sequences were investigated. The samples were characterized by X-ray photoelectron spectroscopy (XPS), $ N_{2} $ adsorption–desorption, scanning electron microscopy (SEM), X-ray powd...
Ausführliche Beschreibung

Abstract The $ V_{2} %$ O_{5} $/$ SiO_{2} $ catalysts promoted by fluoride anion and prepared with different F adding sequences were investigated. The samples were characterized by X-ray photoelectron spectroscopy (XPS), $ N_{2} $ adsorption–desorption, scanning electron microscopy (SEM), X-ray powder diffraction (XRD), temperature-programmed reduction (TPR), oxygen temperature-programmed desorption ($ O_{2} $-TPD) techniques and oxidative dehydrogenation reaction measurements. The results indicated that the fluoride impregnation sequence had a significant effect on the structure and selectivity of propene. Co-impregnation prepared VOF–C catalyst showed a better performance in the ODP reaction. The $ C_{3} %$ H_{6} $ selectivity was 74.9% at 480 °C, compared to 60.9% of V–Si–O sample without promotion. The propane conversion and propene yield were also better. The fluoride addition enhanced the mobility of oxygen in the catalyst. Ausführliche Beschreibung