Transport multi-composants dans les polymères : séparation hydrocarbures / hydrogène par membrane à sélectivité inverse

Abstract : Hydrocarbon / hydrogen separation by reverse selectivity membranes is investigated. The first goal is to develop materials showing an increased selectivity. Silicone membranes loaded with inorganic fillers have been prepared, but the expected enhancement is not observed. The second goal is to model the multi- component transport through rubbers. Indeed the permeability model is not able to predict correctly permeation when a vapour is present. Thus many phenomena have to be considered: diffusional interdependancy, sorption synergy, membrane swelling and drag effect. The dependence of diffusivities with the local composition is modelled according to free-volume theory. The model resolution allows to predict the permeation flow-rates of mixed species from their pure sorption and diffusion data. For the systems under consideration, the diffusional interdependancy is shown to be preponderant. Besides, sorption synergy importance is pointed out, whereas it is most often neglected.
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Guillain Mauviel. Transport multi-composants dans les polymères : séparation hydrocarbures / hydrogène par membrane à sélectivité inverse. Autre. Institut National Polytechnique de Lorraine, 2003. Français. ⟨NNT : 2003INPL115N⟩. ⟨tel-01749782⟩

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