Oxidehydrogenation of propane on MoO

The oxidative dehydrogenation of propane to propene has been studied on a MoO3/γAl2O3 catalyst as a function of temperature, and the results obtained are comparable to those reported in the literature on some vanadium based catalysts. Moreover, as the dehydrogenation reaction requires the abstraction of hydrogen species from the alkane, the hydrogen H* species content that the solid is able to store has been determined. Finally, according to the results obtained, a heterolytic dissociation of propane is proposed, on the active site : « O2- Mnn+ □ » (with □ : anionic vacancy) permitting the abstraction of a H- species and of a H+ species from the hydrocarbon, leading to the formation of the « OH- Mn+ H- » ensemble and of propene

Nano-oxyhydride catalysts for hydrogen production from bioethanol at room temperature

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Nano-oxyhydride catalysts for hydrogen production from bioethanol at room temperature

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Pt monometallic and bimetallic catalysts prepared by acid sol–gel method for liquid phase reforming of bioglycerol

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Deactivation study of the Pt and/or Ni-based γ-Al2O3 catalysts used in the aqueous phase reforming of glycerol for H2 production

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Room Temperature Hydrogen Production from Ethanol over CeNiXHZOY Nano-Oxyhydride Catalysts

ENERGIE:MATERIAUX+HJOCeNiXHZOY nano-oxyhydride catalysts were developed for the highly efficient sustainable hydrogen production from ethanol and water in the oxidative steam reforming reaction. After an insitu treatment in hydrogen in the temperature range of 200-300 degrees C, the cerium-nickel binary mixed oxides became hydrogen reservoirs, which were called oxyhydrides, in the presence of hydrogen species of the hydride nature in the anionic vacancies of mixed oxides. A novel technology was developed for the room temperature hydrogen production by using the chemical energy released from the reaction between CeNiXHZOY nano-oxyhydride catalysts and oxygen, which completely converted ethanol specifically at 60 degrees C (oven temperature) and simultaneously produced hydrogen, carbon dioxide, and carbon monoxide along with small amounts of methane and ethanal. CeNiXHZOY nano-oxyhydride catalysts demonstrated excellent catalytic stability, which was attributed to the graphitic filamentous carbon formed during the reaction. The unique activation phenomenon of the reaction (a huge variation in the temperature between the catalyst bed and the oven) was demonstrated in detail. Finally, the correlations among the catalyst properties, the catalytic performances, and the characterizations were thoroughly discussed

Advanced functionalized Mg2AlNixHzOy nano-oxyhydrides ex-hydrotalcites for hydrogen production from oxidative steam reforming of ethanol

SSCI-VIDE+ATARI:CDFA+WFA:HJOInternational audienceFor a sustainable society, it is highly desirable to produce H-2 from renewable sources and with low energy consumption. Functional, cheap and easy-prepared Mg2AlNixHzOy nano-oxyhydrides materials were successfully developed from Mg2AlNixOy nano-composites exhydrotalcites. After an in situ treatment in H-2 at low temperature (450 degrees C), the Mg2AlNixHzOy nano-composites (x > 1) become hydrogen reservoirs, called oxyhydrides, with the presence of hydrogen species of hydride nature that can be stored in the anionic vacancies of the solid. Advanced techniques in presence of H-2 including TPR, in situ XRD and INS were used to study the nano-composites with different Ni contents. The Mg2AlNixHzOy nano-oxyhydrides (x > 1) are shown to be able to simultaneously provide hydride species and to totally convert ethanol and produce H-2 from a water-ethanol mixture in presence of O-2, with very low energy input. In complement to the exothermic partial oxidation reaction, the chemical energy delivered from the strong exothermic reaction between hydride species and O-2 is used. The reaction is sustainable because hydride species are replaced and provided by ethanol. (C) 2016 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved