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Etude d'un procédé d'imprégnation de fibres de carbone activées

Abstract : The amounts of hydrogen sulphide that can be fixed on the activated rayon fibres studied are very small, particularly under humid conditions. In order to increase the fibre capacities, a process involving an impregnation of the fibres in potassium hydroxide solutions is proposed. Crystallites of K2CO3 can be found on the external surface of the treated fibres. When the fibres are exposed to water vapour together with hydrogen sulphide, a liquid solution is formed on the fibres surface. Acid-base reactions take place in the water layer between the dissolved H2S and the impregnated matter. The amounts of H2S retained are determined by integration of breakthrough curves. The latter represents the evolution as a function of time of the H2S volumic fraction of a gas flow coming out of a reactor containing impregnated fibres. The impregnation and H2S fixation mechanisms have been highlighted and a model has been proposed to predict the breakthrough curves.
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Submitted on : Thursday, August 25, 2005 - 6:55:09 PM
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  • HAL Id : tel-00009984, version 1


Laure Meljac. Etude d'un procédé d'imprégnation de fibres de carbone activées. Autre. Ecole Nationale Supérieure des Mines de Saint-Etienne, 2004. Français. ⟨tel-00009984⟩



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