NH3-NO SCR Catalysts for Engine Exhaust Gases Abatement: Replacement of Toxic V2O5 with MnOx to Improve the Environmental Sustainability

Abstract Mn-WO 3 /TiO 2 catalysts were investigated for Selective Catalytic Reduction (SCR) of NO with NH . The synthesized by wetness impregnation method different Mn loadings (1.5-3-12 wt%) on 8wt%WO All three compared and bare MnO x oxide, used as references. 1.5wt%Mn-8wt%WO exhibited the highest performance in conversion N selectivity. A commercial catalyst, based titania supported vanadia tungsta, (V O 5 -WO ), widely its high efficiency, was also present work. morphological, structural, redox electronic properties their thermal stability studied several techniques (N adsorption/desorption, X-ray diffraction, H temperature-programmed reduction, temperature programmed desorption, photoelectron spectroscopy). aim this paper is to study effect ambition obtain highly active selective a large window temperature. replacement toxic vanadium classic V catalyst best performing 2, represents an important achievement improve environmental sustainability.