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Photodegradation Efficiencies in a Photo-CREC Water-II Reactor Using Several TiO2 Based Catalysts

作者： Benito Serrano Rosales^a, Jesus Moreira del Rio^b, Jesus Fabricio Guayaquil^b, Hugo de Lasa^b

^a Facultad de Ciencias Químicas, Programa de Ingeniería Química, Universidad Autónoma de Zacatecas, México

^b Faculty of Engineering Science, Chemical Reactor Engineering Centre, University of Western Ontario, London Ontario, N6A 5B9, Canada

摘要：This study reports phenol degradation using several TiO2 photocatalysts (DP25, Anatase 1, Hombikat UV-100, Anatase 2) in a Photo-CREC Water-II Reactor. The physicochemical properties of the photocatalysts used, such as crystallinity, superficial area, and pore size distribution are reported. Reactor efficiencies are calculated using both Quantum Yields (QYs) and Photochemical and Thermodynamic Efficiency Factors (PTEFs). This is accomplished using phenol and phenol intermediate photoconversion rates. This allows the determination of hydroxyl radical consumption rates, at every step of the photodegradation process. With these data, and with the absorbed photon rates, energy efficiencies are calculated. It is shown that for the best performing photo catalysts the maximum QYs reach 50?% levels. These favourable photoconversion efficiencies confirm the critical importance of having available highly performing photocatalysts and photoreactors, such is the case of Photo-CREC Water-II Reactor unit.