Abstract. Time-resolved in situ UV/Vis spectroscopy has been successfully applied for analyzing the reduction degree of highly dispersed VOx (0.4–1.1 V/nm2) species over Ti–Si-MCM-41 (Ti/Si = 0–1.5) materials in the oxidative dehydrogenation of propane (ODP) as well as for deriving the kinetic parameters of reduction (with C3H8) and reoxidation (with O2 and N2O) of these species. This…
Abstract. Structural changes of a commercial supported PdAu/SiO2 catalyst for VAM production aged under laboratory and industrial conditions were studied by XRD, TEM/EDXS, XPS, ICP-OES and FTIR spectroscopy. The fresh catalyst contains alloy particles with a wide range of Pd/Au ratios formed by agglomerated crystallites of different sizes. The particles do not show any noticeable sintering …