Structure–Activity Relationship of Different Cu–Zeolite Catalysts for NH3–SCR

Three different catalytic materials for NH 3 –SCR applications have been tested and compared in terms of activity and selectivity towards undesired products, such as N 2 O and NH 4 NO 3 . The selected materials were characterized by the same Cu loading and consisted of a large pore Cu–BETA catalyst and two small pore structures, a Cu–CHA and a Cu–SAPO material. The aim was to investigate the possible effect of the microporous structure of the catalyst on the SCR performances.