Influence of the precursors kind of catalysts on the course of a denox reaction

Many investigations of the approach to NO removal show that the preparation of catalysts and the precursor type both influence the course of the nitrogen oxide reduction by carbon oxide. Catalytic reduction of NO to nitrogen was carried out over supported platinum and palladium catalysts that were derived from chlorides and nitrates as the precursors. The effect of the kind of precursor and the activation conditions on the performance of Pt and Pd/Al2O3 preparation has been studied. The activity was largely dependent not only on the kind of metal support used but also on the precursors. The Pd supported catalyst derived from Pd(NO3)2 was much more active within 773 K temperature than the catalyst prepared from PdCl2. The activity measurements for the Pt catalysts show that the catalyst prepared from H2PtCl6 was more active. The highest activity was revealed by the Pd/Al2O3 obtained from nitrates. The kind of metal cation bounded with carboxyls of EDTA and the kind of geometric structure of contact agent are important factors in generating supported catalysts.