Zdrojový dokument:Scientific papers of the University of Pardubice. Series A, Faculty of Chemical Technology. 21/2015
ISSN:1211-5541
Abstrakt:
The aim of work is to study the vanadium-oxo species at V-alumina and V-silica
catalysts by using of praying Mantis diffuse reflectance accessory, which enables
to measure the spectra under reaction conditions. Firstly, we had focused on the
elimination of setting problems with the praying Mantis diffuse reflectance
accessory. Secondly, we analysed the distribution of vanadium-oxo species at Vsilica
and V-alumina catalysts under oxygen atmosphere and under C2-ODH
reaction conditions. It has been observed that the degree of vanadium
polymerisation was higher on V-alumina in comparison to V-silica. The degree
of polymerisation decreased at V-alumina and V-silica materials under presence
of C2-ODH reaction conditions in comparison to the oxygen atmosphere.