Pt/Sn-containing MFI zeolites prepared by one-pot hydrothermal methods are highly active and selective catalysts for propane dehydrogenation. An alternative preparation method is reported alongside an in-depth characterization of Pt Sn before after reaction. species dispersed on highly-defective Silicalite-1 show a significantly long catalytic lifetime with improved coke resistance, but increas...

Rhodium atoms for alkane dehydrogenation Nanoparticles of rhodium dispersed on metal oxides are generally poor catalysts because the reactants bind too strongly to metal. Hannagan et al. performed first-principle calculations indicating that single in a copper surface should be stable and selective conversion propane propene hydrogen. Model studies embedded (111) revealed very high selectivity ...

The effects of MoOx structure on propane oxidative dehydrogenation (ODH) rates and selectivity were examined on Al2O3-supported MoOx catalysts with a wide range of surface density (0.4-12 Mo/nm), and compared with those obtained on MoOx/ZrO2. On MoOx/Al2O3 catalysts, propane turnover rate increased with increasing Mo surface density and reached a maximum value for samples with ~ 4.5 Mo/nm. All ...

Supported vanadium oxides (VOx) are alternative candidates for non-oxidative propane dehydrogenation (PDH) owing to their competitive performance. This paper describes the roles of V−O sites on PDH over monomeric VOx species supported ZrO2, Al2O3 and SiO2. With control pre-reduction, stable structures obtained PDH, including V−O-support (V−O−S), V−OH V=O sites. By tuning V densities individual ...

A series of vanadia catalysts supported on the mesoporous silica SBA-15 are synthesized using an automated laboratory reactor. The catalysts contain from 0.6 up to 13.6V atoms/nm and are structurally characterized by various techniques (BET, XRD, SEM, TEM, Raman, IR, UV/Vis). Samples containing up to 3.1V/nm are structurally rather similar. They all contain a mixture of tetrahedral (VOx)n speci...

Two different preparation methods, viz. incipient impregnation and mechanical mixing, have been used to prepare V-based oxygen carriers with V loadings for chemical looping oxidative dehydrogenation of propane. The effect the method, loading, reaction temperature on performance these measured discussed. It was found that VOx species can be well distributed support when loading is low (5 wt.% 10...

The oxidative dehydrogenation of propane to propene using carbon dioxide is an attractive novel synthesis route produce a key platform chemical. We investigated iron-chromia catalysts prepared by sol-gel. mixed oxides showed improved specific surface area and high concentration acid base sites were found be highly active catalysts. Although coking was observed over the catalysts, regeneration r...