Please use this identifier to cite or link to this item:
http://hdl.handle.net/2445/184669
Title: | Absorbed radiation and kinetic model in photocatalysis by TiO2 |
Author: | Bayarri Ferrer, Bernardí Giménez Farreras, Jaume Curcó, David Esplugas Vidal, Santiago |
Keywords: | Diòxid de titani Fotocatàlisi Radiació Titanium dioxide Photocatalysis Radiation |
Issue Date: | 10-Sep-2021 |
Publisher: | De Gruyter |
Abstract: | The current work studies a novel and affordable methodology to estimate and quantify the photon flux absorbed and the amount of light that leaves from an illuminated photocatalytic system with TiO2 suspended in water. To achieve it, a new parameter BFSwat-λ is defined and presented. It indicates, for every wavelength, the fraction of the incoming radiation which is not absorbed by the system. BFSwat-λ was estimated by means of actinometric experiments in a jacketed reactor and a model based on Beer-Lambert law. For wavelengths below 388 nm and TiO2 concentrations between 0.05 and 2 g L−1, experimental values of BFSwat-λ were between 0.77 and 0.27. In the second part of the work, a simple kinetic model, which breaks down the effect of incident radiation and kinetic constant, is developed. For this, the photon flux absorbed by TiO2, previously determined, was included in the model. This new model was tested in the photocatalytic degradation of 2,4-dichlorophenol under different TiO2 concentrations. The kinetic model fits satisfactorily the experimental values and a new kinetic constant kʹ ap [mol·L−1 Einstein−1] was obtained, which is independent of the amount of catalyst loaded to the system. This achievement may be very useful for an easy initial comparison, design or scaling up of different photocatalytic reactors with similar geometry. |
Note: | Reproducció del document publicat a: https://doi.org/10.1515/ijcre-2021-0045 |
It is part of: | International Journal Of Chemical Reactor Engineering, 2021, vol. 20, num. 1, p. 3-15 |
URI: | http://hdl.handle.net/2445/184669 |
ISSN: | 2194-5748 |
Appears in Collections: | Articles publicats en revistes (Enginyeria Química i Química Analítica) |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
718324.pdf | 1.45 MB | Adobe PDF | View/Open |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.