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Mesure et modélisation des conditions de dissociation d'hydrates de gaz stabilisés en vue de l'application au captage du CO2

Abstract : The capture and the detention of the CO2, stemming from heatings, vehicles, incineration units and various types of combustion or fermentation became a world stake. The capture of this gas by using hydrates absorption is a promising alternative. The aim of this work is to study the stability of mixed hydrates systems containing CO2 and another gas (N2, CH4 and H2) with pure water, or with an additive allowing to decrease the operating pressures: the tetrabutylamonium bromide (TBAB), in a perspective of gas separation. The experimental technique that we have used is the differential scanning calorimetry (DSC). It allowed us to measure the dissociation temperatures and enthalpies for various hydrate with pure water: N2, CH4, N2 + CO2, CH4+CO2, H2+CO2; but also semi-clathrates systems: CO2+CH4 and CO2+N2 with different mass percentages of TBAB (10, 20, 30 and 40). The last part of this thesis concerns the modelling thermodynamics of semi-clathrate systems, where we developed the particular case of the system: CH4+TBAB.
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Submitted on : Monday, February 6, 2012 - 11:08:50 PM
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Wassila Bouchafaa. Mesure et modélisation des conditions de dissociation d'hydrates de gaz stabilisés en vue de l'application au captage du CO2. Génie des procédés. ENSTA ParisTech, 2011. Français. ⟨pastel-00667115⟩

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