公开(公告)号：EP3229956A4

公开(公告)日：2018-06-27

申请号：EP15855461

申请日：2015-10-30

Applicant: BASF CORP

Inventor： MOHANAN JAYA L ,  YANG JEFF ,  BURK PATRICK ,  VOSS KENNETH E

IPC: B01J29/072 ,  B01D53/56 ,  B01D53/94 ,  B01J29/70

CPC classification number: B01J29/763 ,  B01D53/8628 ,  B01D53/9418 ,  B01D2255/20738 ,  B01D2255/20761 ,  B01D2255/50 ,  B01D2255/9022 ,  B01D2255/9032 ,  B01D2255/9202 ,  B01D2257/404 ,  B01J29/80 ,  B01J35/0006 ,  B01J35/002 ,  B01J37/0244 ,  B01J37/0246 ,  B01J2229/186 ,  C01B39/48

Abstract: Described are compositions and catalytic articles comprising both a first molecular sieve promoted with copper and a second molecular sieve promoted with iron, the first and second molecular sieves having a d6r unit and the first molecular sieves having cubic shaped crystals with an average crystal size of about 0.5 to about 2 microns. The weight ratio of the copper-promoted molecular sieve to the iron-promoted molecular sieve can be about 1:1 to about 4:1. The catalytic articles are useful in methods and systems to catalyze the reduction of nitrogen oxides in the presence of a reductant.