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Título del libro: Proceedings Of The Solar World Congress 2005: Bringing Water To The World, Including Proceedings Of 34th Ases Annual Conference And Proceedings Of 30th National Passive Solar Conference
Título del capítulo: Radiation absorption in a flat-plate solar photocatalytic reactor

Autores UNAM:
SERGIO CUEVAS GARCIA; CAMILO ALBERTO ARANCIBIA BULNES;

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Autores externos:

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Idioma:

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Año de publicación:
2005

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Palabras clave:

Advanced oxidation process; Catalyst concentration; Degradation process; Extinction coefficients; Flat plate; Heterogeneous photocatalysis; OH radical; Optimal design; Photocatalytic reactors; Polluting agents; Radiation absorption; Solar UV radiation; Theoretical calculations; Theoretical models; TiO; Catalysts; Forecasting; Free radicals; Optical properties; Photocatalysis; Titanium dioxide; Ultraviolet radiation; Incident solar radiation

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Resumen:

Advanced oxidation processes (AOP) are characterized by a great ability to produce OH radicals, which are very reactive with substances contained in a medium. Heterogeneous photocatalysis with titanium dioxide (TiO2) is one of these processes, which uses ultraviolet radiation (UV) to activate reactions leading to the degradation of polluting agents in water. In order to obtain an optimal design of the reactors where the degradation process is carried out, it is necessary to know the amount of energy that is being absorbed by the catalyst. In the present work, we compare the predictions of the P1 approximation with experimental data to assess the applicability of this theoretical model to evaluate radiation absorption in reactors of the plane parallel collector geometry. To this end we have built a flat reactor with a transparent bottom. We have measured the incident solar UV radiation and the radiation transmitted trough the bottom of the reactor simultaneously, by using two Eppley TUVR radiometers. The transmittance of the plate is evaluated from the experimental data and compared with the predictions of the model for different catalyst concentrations and depths of the water/catalyst suspension. To carry out the theoretical calculations, the optical properties of the TiO2 particles are necessary. The extinction coefficient for the particles were obtained from spectrophotometric experiments, and used to carry out the calculations.

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Entidades citadas de la UNAM:

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Fuente:


ISBN:
9781622762637
Editorial:

Tipo de producto:
Conference Paper