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Étude expérimentale et numérique d’écoulements réactifs en conditions hydrothermales : mélanges de fluides et précipitation de sels

Abstract : HydroThermal Oxidation (HTO) is one of the technologies applied for radio-contaminated organic liquid waste treatment. HTO uses the peculiar properties of supercritical water to achieve a complete destruction of organic compounds within very short residence times in continuous compact reactors. A thermohydraulic model, coupled with combustion kinetics, was previously developed by the CEA, and implemented using CFD software ANSYS Fluent. In order to improve the description of the flow in continuous HTO reactors, mixtures density measurements allowed to find a model fitting these experimental data. This model was consequently incorporated into the previous numerical simulation. The issue of mineral salts precipitation was also taken into account, by an experimental methodology allowing to acquire solubility data of model compounds, and also to collect and characterise the deposit obtained after precipitation of these compounds in an ad hoc continuous device. This experimental work was followed by the implementation of these precipitation and deposition phenomena in the numerical model
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https://tel.archives-ouvertes.fr/tel-01816987
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Submitted on : Friday, June 15, 2018 - 10:37:43 PM
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  • HAL Id : tel-01816987, version 1

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Gaëtan Lemoine. Étude expérimentale et numérique d’écoulements réactifs en conditions hydrothermales : mélanges de fluides et précipitation de sels. Génie des procédés. Université de Lorraine, 2017. Français. ⟨NNT : 2017LORR0235⟩. ⟨tel-01816987⟩

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