公开(公告)号：CA2997040A1

公开(公告)日：2017-03-09

申请号：CA2997040

申请日：2016-08-29

Applicant: BASF SE

Inventor： HILGENDORFF MARCUS ,  DUMBUYA KARIFALA ,  ZABEL CLAUDIA ,  STIEBELS SUSANNE

IPC: B01J29/76 ,  B01D53/94 ,  B01J35/00 ,  B01J37/02

Abstract: Described is a catalyst comprising a washcoat including copper or iron on a small pore molecular sieve material having a maximum ring size of eight tetrahedral atoms physically mixed with platinum and rhodium on a refractory metal oxide support including alumina, silica, zirconia, titania, and physical mixtures or chemical combinations thereof, including atomically doped combinations. Also described is a catalyst comprising a first washcoat zone including copper or iron on a small pore molecular sieve material having a maximum ring size of eight tetrahedral atoms, the first washcoat zone being substantially free of platinum group metal; and a second washcoat zone including copper or iron on a small pore molecular sieve material having a maximum ring size of eight tetrahedral atoms physically mixed with platinum or platinum and rhodium on a refractory metal oxide support including alumina, silica, zirconia, titania, and physical mixtures or chemical combinations thereof, including atomically doped combinations. Methods and systems for treating emissions are also described.