Anaerobic Oxidative Dehydrogenation of Propane to Propene

Several papers describe the anaerobic OD H of alkanes to olefin with catalysts based on metal oxides [77-83]. In many cases, an improved selectivity to the olefin as compared to the co-feed operation has been achieved in other cases, no effective improvement has been reported. For instance, catalysts made of V205-Si02 showed a remarkably improved selectivity to propene with respect to the co-feed conditions for propane ODH, whereas the same remarkable effect was not observed with catalysts 

One condition for obtaining an improved selectivity with the cycle operation is the presence of catalysts in which V sites are highly dispersed this was achieved by preparing vanadium oxide-silica co-gels, with a V2O5 content lower than 10% [77b,e]. The improvement in selectivity to propene was around 30 percentage points (60% selectivity in cyclic mode versus 30% in co-feed mode) for a propane conversion of 35%. 

The reduction of SOC by H2 can be either endo- or exothermic, depending on the type of oxide in the latter case, the reduction provides the energy gain to support the 

Production of Hydrogen from Methane with Oxide Materials and Inherent Segregation of Carbon Dioxide 

ENI is exploiting this principle for the development of an innovative technology (one-step hydrogen) for H2 production from fossil fuels with an inherent confinement of C02 in a concentrated stream, ready to be buried [88]. 

---