With TiO2-photocatalysis being an effective alternative to other more expensive Advanced Oxidation Processes (AOPs), the possibility of using micro-sized TiO2 materials rather than the well-known nanosized powders is an important goal in terms of both handling safety and cost saving. In this work the photodegradation of ethanol, used as a model VOC (Volatile Organic Compound) molecule, was investigated, comparing the efficiency of both commercial nano- and micro- sized TiO2 samples. In all cases the same degradation pathway was observed, namely, a consecutive first-order reaction with acetaldehyde as an intermediate product and CO2 and water as the final products. All photocatalysts were characterized by means of XRD, TEM, IR, BET and XPS analysis. A kinetic model was also developed considering the collected experimental data and a regression of both adsorption and kinetic constants was made using MATLAB software. The optimized parameters were used for simulating the experimental data using an ode15s algorithm.

Nano and micro-TiO2for the photodegradation of ethanol: experimental data and kinetic modelling / C.L. Bianchi, C. Pirola, F. Galli, M. Stucchi, S. Morandi, G. Cerrato, V. Capucci. - In: RSC ADVANCES. - ISSN 2046-2069. - 5:66(2015), pp. 53419-53425. [10.1039/C5RA05385D]

Nano and micro-TiO2for the photodegradation of ethanol: experimental data and kinetic modelling

C.L. Bianchi;C. Pirola;F. Galli;M. Stucchi;
2015

Abstract

With TiO2-photocatalysis being an effective alternative to other more expensive Advanced Oxidation Processes (AOPs), the possibility of using micro-sized TiO2 materials rather than the well-known nanosized powders is an important goal in terms of both handling safety and cost saving. In this work the photodegradation of ethanol, used as a model VOC (Volatile Organic Compound) molecule, was investigated, comparing the efficiency of both commercial nano- and micro- sized TiO2 samples. In all cases the same degradation pathway was observed, namely, a consecutive first-order reaction with acetaldehyde as an intermediate product and CO2 and water as the final products. All photocatalysts were characterized by means of XRD, TEM, IR, BET and XPS analysis. A kinetic model was also developed considering the collected experimental data and a regression of both adsorption and kinetic constants was made using MATLAB software. The optimized parameters were used for simulating the experimental data using an ode15s algorithm.
Settore ING-IND/25 - Impianti Chimici
Settore CHIM/04 - Chimica Industriale
2015
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/284176
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