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Contribution à l'étude de l'adsorption et de la désorption de composés organiques volatils chlorés sur charbons actifs

Abstract : Adsorption and desorption of water and chlorinated volatile organic compounds (VOCs) in static (adsorption isotherms) and dynamic conditions (breakthrough curves) have been performed on different activated carbons (ACs) (granulated ACs and activated carbons fibers) with different textural characteristics and surface chemistry. The main objective of this study is to separate the different component of a chlorinated VOCs mixture in the presence or not of water vapor. It appears that both porous texture and surface chemistry of ACs as physicochemical characteristics of the probes have a strong influence on their adsorption (or desorption) process (mechanism and kinetics). A special attention has been drawn on the influence of the water presence : at high relative humidity rate, ACs adsorption properties (adsorbed amount and kinetics) for chlorinated VOCs are strongly affected. Separation of the dichloromethane/trichloroethylene mixture has been successfully realized whatever the experimental conditions. Last, an exploratory study on the AC hydrophobisation possibilities by the graphting of non-polar groups in liquid phase has been undertaken in order to limit the water presence effects.
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http://docnum.univ-lorraine.fr/prive/SCD_T_2004_0156_COSNIER.pdf
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Submitted on : Thursday, March 29, 2018 - 10:44:35 AM
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Frédéric Cosnier. Contribution à l'étude de l'adsorption et de la désorption de composés organiques volatils chlorés sur charbons actifs. Autre. Université Henri Poincaré - Nancy 1, 2004. Français. ⟨NNT : 2004NAN10156⟩. ⟨tel-01746772⟩

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