Effect of different catalysts in SO2 oxidation over polymeric concrete

Polymeric concrete performance in polluted environment has been studied in order to determine outdoor pollutant transfer process. SO2 oxidation process over different building materials in laboratory-based atmospheric flow chambers is well known; however, the effect of NOx is not very clear. In order to clarify this process, the effect of NOx in SO2 oxidation over the surface of a porcelain material was studied under wetted and unwetted conditions. In the chamber, NOx can either catalyse SO2 reaction or undergo oxidation to NO3−. The main conclusion in this work is that for the porcelain samples under wetted conditions NO and NO2 catalysed the reaction. But in unwetted conditions NO reacts with the sample instead of SO2.