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Production d'hydrogène par l'oxydation partielle catalytique du propane

Abstract : Hydrogen is proposed as an energy vector for the future. Indeed, its energetic use by oxidation in fuel cells produces water vapor only. The partial oxidation of hydrocarbons, an exothermic reaction, can be an alternative or a complement to the steam cracking (endothermic) for hydrogen generation. Propane can be an interesting hydrocarbon for hydrogen production since it can be easily stored in liquid phase and distributed. The aim of this work is the kinetic study of the catalytic partial oxidation of propane. The reaction is complex: catalytic reactions are coupled to reactions in gas phase by the intermediary of radicals. The reaction was studied in a catalytic jet stirred reactor. At first, an experimental study was carried out without a catalyst. A homogeneous mechanism could be validated. Afterwards, this same reaction has been studied in presence of cerium oxide pellets. A heterogeneous mechanism was written using the formalism of Eley-Rideal and that of Langmuir-Hinshelwood. The kinetics parameters are estimated by methods derivated from Benson's techniques. Comparing experimental results and those from the simulation (carried out by Chemkin®/Chemkin Surface®), a hetero-homogeneous mechanism was validated in our experimental conditions
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Céline Hognon. Production d'hydrogène par l'oxydation partielle catalytique du propane. Alimentation et Nutrition. Université de Lorraine, 2012. Français. ⟨NNT : 2012LORR0160⟩. ⟨tel-01749363⟩



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