| abstract |
Summary catalytic selective reduction catalyst system scr catalyst systems are described comprising a first scr catalyst composition and a second scr catalyst composition arranged in the system, the first scr catalyst composition promoting higher n2 formation and lower formation. than the second scr catalyst composition, and the second scr catalyst composition having a different composition from the first scr catalyst composition, the second scr catalyst composition promoting lower n2 formation and higher n2o formation. that the first scr. scr catalyst systems are useful in methods and systems for catalyzing the reduction of nitrogen oxides in the presence of a reducer. 1/1 |