公开(公告)号：CA3032554A1

公开(公告)日：2018-02-08

申请号：CA3032554

申请日：2017-08-04

Applicant: BASF CORP

Inventor： XUE WEN-MEI ,  YANG JEFF ,  ROTH STANLEY ,  VOSS KENNETH E ,  SHAH SANDIP ,  MOHANAN JAYA L ,  FU QI ,  PRASAD SUBRAMANIAN ,  SLAWSKI BARBARA

IPC: C01B39/02 ,  B01J29/072 ,  B01J29/70 ,  B01J35/04 ,  B01J37/02 ,  F01N3/20

Abstract: Certain selective catalytic reduction (SCR) articles, systems and methods provide for high NOx conversion while at the same time low N2O formation. The articles, systems and methods are suitable for instance for the treatment of exhaust gas of diesel engines. Certain articles have zoned coatings disposed thereon, for example, a zoned coating comprising an upstream zone comprising a coating layer comprising a steam-activated iron-containing molecular sieve and a downstream zone comprising a coating layer comprising a high copper-containing molecular sieve.

公开(公告)号：CA3041422A1

公开(公告)日：2018-05-03

申请号：CA3041422

申请日：2017-10-23

Applicant: BASF CORP

Inventor： SHAH SANDIP

IPC: F01N3/20 ,  F01N3/08 ,  F01N3/10

Abstract: Certain catalytic articles, systems or methods provide for excellent NOx conversion and are especially suitable for low temperature NOx conversion. The articles, systems and methods are suitable for instance for the treatment of exhaust gas of diesel engines. Certain articles or systems contain an upstream SCR composition and a downstream LNT composition. The substrate(s) may advantageously be electrically heated.

公开(公告)号：CA3032587A1

公开(公告)日：2018-02-08

申请号：CA3032587

申请日：2017-08-04

Applicant: BASF CORP

Inventor： XUE WEN-MEI ,  YANG JEFF ,  ROTH STANLEY ,  VOSS KENNETH E ,  SHAH SANDIP ,  MOHANAN JAYA L

IPC: B01J37/02 ,  B01J29/072 ,  B01J29/76 ,  B01J35/04 ,  F01N3/20

Abstract: Certain selective catalytic reduction (SCR) articles, systems and methods provide for high NOx conversion while at the same time low N2O formation. The articles, systems and methods are suitable for instance for the treatment of exhaust gas of diesel engines. Certain articles have zoned coatings containing copper-containing molecular sieves disposed thereon, where for example a concentration of catalytic copper in an upstream zone is lower than the concentration of catalytic copper in a downstream zone.