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Traitement hydrothermal de déchets industriels spéciaux. Données pour le dimensionnement d'installations industrielles et concepts innovants de réacteurs sonochimique et électrochimique

Abstract : Hydrothermal oxydation process provides as great technico-economic alternative for the treatment of aqueous industrial wastes. In order to promote the development of this technology, data for scaling up hydrothermal oxidation reactor have been determined. In particular, the reactive pathway of a nitrogen containing compound, the fenuron C6H5-NH-CO-N(CH3)2), has been proposed and the global reaction heat of acetic acid oxidation has been evaluated at -925 kJ.mol-1. Moreover two innovating concepts of sonochemical and electrochemical reactors have been developed to overcome salt precipitation and corrosion. The sonochemical reactor allows to speed up the hydrothermal oxidation reaction rate in order to reduce the reactor operating conditions in pressure and in temperature. At 2.8 MPa and 220°C, the acetic acid conversion rate reachs 83%. Concerning the electrochemical reactor, it was built to treat aqueous briny wastes and allows to generate in situ oxidizing species by electrolysis. A study of the electrolysis zone has been realized
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Submitted on : Friday, November 26, 2004 - 7:19:08 PM
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Cyril Aymonier. Traitement hydrothermal de déchets industriels spéciaux. Données pour le dimensionnement d'installations industrielles et concepts innovants de réacteurs sonochimique et électrochimique. Sciences de l'ingénieur [physics]. Université Sciences et Technologies - Bordeaux I, 2000. Français. ⟨tel-00007553⟩

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