Heterogeneous Photocatalysis Applied to Concrete Pavement for Air Remediation

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

Nanotechnology in Construction 3

Springer

Año: 2009; p. 409 - 414

In the present work the degradation of nitrogen oxides (NOx) by concrete paving stones containing TiO2 to be applied in road construction 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 obtained model predictions employing the determined kinetic constants are in good agreement with the experimental results of NO concentration at the reactor outlet.