Structural and Functional Designs of Catalysts for Reduction of Nitrogen (I), (II) Oxides

Abstract

Co-and Ag-containing catalysts on structured supports were investigated for use in DeNO x processes, in particular, in the process of combined reduction of N 2 O and NO with carbon monoxide and in selective catalytic reduction of NO with C 2 and C 4 alcohols. It was shown that doping of cobalt-cerium-zirconium oxide with 0.1 wt.% of Pd significantly lowers the temperature for achieving high conversions of N 2 O and NO (up to 200-300 °C) in a reaction mixture containing N 2 O, NO, CO and O 2 . The activity of Ag/Al 2 O 3 /cordierite catalysts in the selective reduction of nitrogen oxides by ethanol and butanol rises with increasing of Al 2 O 3 loading and depends on the optimal silver content added. Silver is associated with the regulation of redox and acid-base properties of the catalyst surface.