Eco Concrete Stones with TiO2 for Atmospheric Decontamination

MARÍA DE LOS MILAGROS BALLARI; MARTIN HUNGER; GÖTZ HÜSKEN; JOS H.J.H. BROUWERS

Enschede (Holanda)

Conferencia; Construction Material Stewardship International Conference and Annual Meeting; 2009

In the present work the degradation of nitrogen oxides (NOx) by concrete paving stones containing TiO2 is studied. A kinetic model is proposed to describe the photocatalytic reaction of nitric oxide (NO) in a standard flow laminar photoreactor irradiated with UV lamps. In addition the influence of several parameters that can affect the performance of these stones under outdoor conditions are investigated, such as irradiance, relative humidity and wind speed. The kinetic parameters present in the NO reaction rate are estimated employing experimental data obtained in the photoreactor. The model predictions employing the determined kinetic constants are in good agreement with the experimental results of NO concentration at the reactor outlet.