INTEC   05402
INSTITUTO DE DESARROLLO TECNOLOGICO PARA LA INDUSTRIA QUIMICA
Unidad Ejecutora - UE
artículos
Título:
Photocatalytic reactors with suspended and immobilized TiO 2 : Comparative efficiency evaluation
Autor/es:
SATUF, MARÍA LUCILA; ALFANO, ORLANDO MARIO; MANASSERO, AGUSTINA
Revista:
CHEMICAL ENGINEERING JOURNAL
Editorial:
ELSEVIER SCIENCE SA
Referencias:
Lugar: Amsterdam; Año: 2017 vol. 326 p. 29 - 36
ISSN:
1385-8947
Resumen:
Theefficiency of three photocatalytic reactor configurations for the degradationof the micropollutant clofibric acid in water was assessed. The followingreaction systems were tested: (i) a slurry reactor with suspended TiO2particles; (ii) a fixed-film reactor with TiO2 immobilized onto the reactorwindow; and (iii) a fixed-bed reactor filled with TiO2-coated glass rings. Theinfluence of the catalyst concentration in the suspended system and the numberof the catalyst coatings in the immobilized systems were evaluated.Theperformances of the reactors, under the experimental condition of highestreaction rate for each configuration, were compared with the aid of twoparameters: (i) the photonic efficiency (g), which is the ratio of the reactionrate to the rate of incident photons; and (ii) the quantum efficiency (gRxn), whichis the ratio of the reaction rate to the photon absorption rate. The obtainedvalues of gRxn were 4.59, 2.96 and 2.02% for the slurry reactor, the fixed-bedreactor and the fixed-film reactor, respectively. Although the slurry reactorwas the most efficient configuration, the fixed-bed reactor rendered a value ofquantum efficiency only one third lower than the suspended system, making thisconfiguration very convenient for photocatalytic reactions. The analysis of thereaction rate, the photon absorption rate and the quantum efficiency areessential to rationally improve the design, configuration and experimentalconditions ofphotocatalytic reactors.