Acetaldehyde Degradation in Gas Phase Appling Visible Light Photocatalysis

BALLARI, M.; MINEN, R.; CARBALLADA, J.; SALVADORES, F,; ALFANO, O.M.; CASSANO, A.E.

Conferencia; 3rd. European Conference on Environmental Applications of Advanced Oxidation Processes; 2013

A commercial visible light response TiO2 powder (Kronos vpl 7000) is employed to study the acetaldehyde degradation under indoor air conditions. The TiO2 powder was immobilized on  borosilicate glass plates according to a dip coating method. The photocatalytic degradation of acetaldehyde in gas phase was performed in a continuous gas flat plate photoreactor irradiated with a visible light source. The photocatalytic reaction was studied varying the main operating parameters of the systems, such as flow rate, relative humidity, inlet concentration of the pollutant and irradiance level. A good mineralization of the pollutant was observed with a small amount of formaldehyde formation, as the main intermediate of the photocatalytic acetaldehyde reaction. The good photocatalytic performance of modified TiO2 under visible light is promising for full scale indoor air decontamination.