Modeling of a flat-plate solar reactor. Degradation of formic acid by the photo-Fenton reaction |
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Authors: | Germ n H. Rossetti, Enrique D. Albizzati,Orlando M. Alfano |
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Affiliation: | aInstituto de Desarrollo Tecnológico para la Industria Química (INTEC), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Nacional del Litoral (UNL), Güemes 3450, 3000 Santa Fe, Argentina;bFacultad de Ingeniería Química, Universidad Nacional del Litoral (UNL), Santiago del Estero 2654, 3000 Santa Fe, Argentina |
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Abstract: | This work describes the use of solar radiation to destroy an organic pollutant in aqueous solution, using the photo-Fenton reaction. Formic acid was chosen as the model substrate. A kinetic model that accounts for the dark (Fenton) and the light activated (photo-Fenton) reaction rates in a single mathematical expression has been used. Furthermore, to take into account the irradiated and the nonirradiated liquid volumes, a rigorous mass balance for each one of the reactant species has been applied. Under the adopted operating conditions, an organic pollutant conversion up to 81% was achieved after 1 h of operation. Predictions of the theoretical model were compared with experimental results and good agreement for formic acid and hydrogen peroxide concentration evolutions was obtained. Deviations between model predictions and experimental data were always smaller than 9%. Theoretical and experimental results of the pollutant conversion showed that solar irradiation improves the effectiveness of the Fenton system significantly; a pollutant conversion 175% greater than that obtained with the dark system alone was observed. |
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Keywords: | Solar reactor Reactor modeling Photo-Fenton reaction UV radiation Degradation Formic acid |
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