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Vanadium containing catalysts were prepared on silica at vanadia loadings from 1.25 to 12.5% and using different vanadia precursors. Even though no V2O5 crystallites were detected via X-ray powder diffraction or Temperature programmed reduction on the catalysts at vanadia loadings up to 5%, an increased propylene formation rate per gram of vanadium was recorded for catalysts as their surface area...
Hydrogen adsorption on Ru surfaces of Ru/TiO 2 catalysts has been investigated in a gas adsorption apparatus at temperatures from 35 to 150°C, H 2 partial pressures from 0.05 to 700Torr, and adsorption equilibration time at each pressure from 3 to 60min. Results showed that adsorption of H 2 on the TiO 2 support are negligible. TEM measurements suggested that there...
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