Synthèse et caractérisation thermodynamique d'hydrates de gaz contenant de l'hydrogène

Abstract : The limited fossil fuels resources and the environmental issues they cause, make moving towards clean and renewable energy sources inevitable. In this perspective, hydrogen is attracting more and more attentions these days. Hydrogen is a clean fuel, which combustion doesn't produce any pollutant or any greenhouse gas. Moreover, its energetic density is around three times higher than conventional fuels. In spite of its favorable chemical properties, storage and transport of hydrogen has been always a big challenge for industry. In this regard, different approaches are made and different technologies are proposed for storage of hydrogen. This work, concerns the synthesis and characterization of hydrogen hydrates of different structures in presence of water soluble additives and gas promoters. At the first step, semi-clathrate systems of quaternary salts (TBAOH) and (TBPBH4) were investigated. Using a differential scanning calorimeter (DSC) their phase equilibrium were investigated and phase diagrams were established. Moreover, using volumetric measurements the quantity of hydrogen stored in these semi-clathrates was measured. In the second approach, the effect of a promoter gas such as propane and carbon dioxide on the stability of hydrogen hydrate was investigated. The phase equilibria of these systems were studied and compared with those of pure C3H8, CO2 hydrate and pure H2 hydrate. Moreover, the gas compositions before and after hydrate formation were analyzed. Keywords: Hydrogen hydrates, semi-clathrate hydrates, phase equilibria, Differential Scanning Calorimetry (DSC), PVT measurements
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Amir Abbas Karimi. Synthèse et caractérisation thermodynamique d'hydrates de gaz contenant de l'hydrogène. Génie chimique. Ecole Polytechnique X, 2013. Français. ⟨pastel-00998311⟩

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