Catalytic activation of C-H bonds of hydrocarbons by heteropolycompounds

The activation of C-H bonds of hydrocarbon over different heteropolycompounds (HPC) HPMo12O40, FePMo12O40 and PMo11FeO39 catalysts was studied. The catalysts were prepared and characterized by several physical techniques (BET, XRD, FTIR, Raman and P-31 MAS NMR) and the catalytic properties evaluated in the temperature range of 250-400 degrees C. This study examined the relation between the acid-base, redox properties of heteropolycompounds and the reaction behavior of various hydrocarbons n-hexane, cyclohexane, cyclohexene and toluene over these catalysts. The results showed that HPC were more active and selective for the oxidation of C-H bond of hydrocarbon and have pronounced catalytic activity which depends on reaction temperatures, nature of oxo metal (Mo, Fe) in the primary structure and counter-ion (H3O+, NH4+, Fe3+). (C) 2010 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.