Oxidative dehydrogenation of ethane over VMoTeNbО/SiO2 catalysts. Effect of the initial support compound on physicochemical and catalytic properties

Silica-supported catalysts with the cationic gross composition V0.3Mo1Te0.23Nb0.12 were synthesized by the slurry method upon variation of the initial support compound (TEOS, silica sol, silica gel, aerosil). The synthesized catalysts were characterized by means of nitrogen thermal desorption, chemical and X-ray diffraction analysis, and high resolution electron microscopy. The catalytic properties were examined in oxidative dehydrogenation of ethane at a temperature of 400 °C in the reaction mixture with the composition С2Н6 : О2 : N2 = 10 : 10 : 80 (vol.%). The maximum activity was observed for the samples obtained with the use of silica gel, which is caused by the formation of nanodomains of the active phase M1 in amorphous matrix of the support and by its partial dispersion.