A prototype reactor was designed and tested to oxidize synthetic organic chemicals (SOCs) without the use of expendable chemicals and without the need to separate the catalyst from the water after treatment. An annular continuous flow reactor with a nominal volume of 400 mL was packed with silica gel pellets that were doped with titania (TiO2) (12 wt%). The reactor was configured in a test stand with UV lamps in the center of the reactor. SOC oxidation experiments were performed in a recycle mode and in a single-pass mode. Five target analytes (acetone, chlorobenzene, ethyl acetate, toluene, and methylmethacrylate) were spiked (100 to 300 μg/L) into nano-pure water and recycled through the reactor until adsorption equilibrium was attained. UV lamps, which were shielded, were then uncovered, and effluent concentrations were monitored as a function of time. All of the compounds were degraded to below detection limit (5 μg/L) after an extended reaction period of 23 hours. Oxidation was found to be a function of empty bed contact time, and first order rate constants for the photocatalytic degradation of three of the contaminants were determined.


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    Titel :

    Photocatalytic Oxidation of Selected Organic Contaminants in a Continuous Flow Reactor Packed with Titania-Doped Silica


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:

    Kongress:

    International Conference On Environmental Systems ; 2004



    Erscheinungsdatum :

    19.07.2004




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Photocatalytic Oxidation of Selected Organic Contaminants in a Continuous Flow Reactor Packed with Titania-Doped Silica

    Holmes, F. R. / Chadik, P. A. / Mazyck, D. W. et al. | British Library Conference Proceedings | 2004




    Photocatalytic Oxidation of Volatile Organic Contaminants

    Graf, J. C. / SAE | British Library Conference Proceedings | 1995


    Photocatalytic Oxidation of Volatile Organic Contaminants

    Graf, John C. | SAE Technical Papers | 1995