Effect of vanadia loading in propane oxidative dehydrogenation on V2O5/SiO2 catalysts

Vanadium oxide supported on mesoporous SBA-15 as highly selective catalysts in the oxidative dehydrogenation of propane

“…Actually, a clear relationship between the dispersion of vanadium oxide on the silica surface and the selectivity to propylene has been observed [10]. Both vanadium species dispersion and propylene selectivity drastically decreased for vanadia loading above 5 wt% in V 2 O 5 /SiO 2 catalysts [10]. Such behavior has been interpreted with a change in the molecular structure of the supported VO x species with increasing vanadium loading.…”

“…Isolated tetrahedral vanadium oxide species containing terminal V=O groups has been suggested as the active sites for the selective formation of propylene [2]. Actually, a clear relationship between the dispersion of vanadium oxide on the silica surface and the selectivity to propylene has been observed [10]. Both vanadium species dispersion and propylene selectivity drastically decreased for vanadia loading above 5 wt% in V 2 O 5 /SiO 2 catalysts [10].…”

“…It is known that the catalytic behavior of supported vanadium oxide catalysts in the selective oxidation of propane depends strongly on the content of vanadium loaded on the metal oxide supports [8][9][10]. Isolated tetrahedral vanadium oxide species containing terminal V=O groups has been suggested as the active sites for the selective formation of propylene [2].…”

The role of niobium in the gas- and liquid-phase oxidation on metallosilicate MCM-41-type materials

“…Since it is known that high selectivities to propene are favoured at high reaction temperatures on most often studied vanadium-containing catalysts [26][27][28], propane oxidation has been mainly performed in this work at the temperature range 753-823 K.…”

Redox Properties of Vanadium Ions in SBA-15-Supported Vanadium Oxide: An FTIR Spectroscopic Study

“…7,8 According to the literature, the catalytic behavior of vanadium catalysts strongly depends on (i) the content and respective distribution of vanadium species, [9][10][11] (ii) the oxidation state of vanadium, 12 and (iii) the support material. [13][14][15][16] Several studies have reported a correlation between the oxidation state of vanadium and its reactivity behavior.…”