At Chemical Engineering we work with reducing NOx emissions from diesel vehicles using heterogeneous catalysis. One promising solution is urea selective catalytic reduction (SCR). In this concept urea is dosed first, and the urea is than decomposed and hydrolysed to form ammonia before the SCR catalyst. In the catalyst the ammonia reacts selectively with NOx, resulting in formation of N2 and H2O and thereby reducing the NOx emissions. At the division we work extensively with this concept using catalyst preparation, catalyst characterization, activity and selectivity measurements, DRIFT spectroscopy, micro calorimetry and kinetic modelling.