公开(公告)号：MY193820A

公开(公告)日：2022-10-27

申请号：MYPI2017001252

申请日：2016-02-26

Applicant: BASF CORP

Inventor： HALLSTROM KEVIN A ,  MOHANAN JAYA L ,  VOSS KENNETH E ,  SHAH SANDIP D ,  HOCHMUTH JOHN K

IPC: B01J29/00 ,  B01D50/00 ,  B01D53/56 ,  B01D53/94 ,  C01B39/02 ,  C09K3/00 ,  F01N3/10

Abstract: Described are exhaust gas treatment systems for treatment of an engine exhaust gas stream containing NOx. The exhaust gas treatment system comprises an engine, a catalyst system including a selective catalytic reduction article comprising two zones, an upstream zone (18; 48; 78; 118; 318; 418; 420) comprising iron-promoted first molecular sieves and a downstream zone comprising copper-promoted second molecular sieves. The catalyst system is effective to reduce high NOx levels in the exhaust gas stream. Also described are methods for treatment of engine exhaust gas streams, comprising treating engine exhaust gas streams containing high NOx levels with catalyst systems including selective catalytic reduction articles having two zones.

公开(公告)号：ZA201706345B

公开(公告)日：2022-08-31

申请号：ZA201706345

申请日：2017-09-20

Applicant: BASF CORP

Inventor： VOSS KENNETH E ,  MOHANAN JAYA L ,  HALLSTROM KEVIN A ,  SHAH SANDIP D ,  HOCHMUTH JOHN K

Abstract: Described are exhaust gas treatment systems for treatment of an engine exhaust gas stream containing NOx. The exhaust gas treatment system comprises an engine, a catalyst system including a selective catalytic reduction article comprising two zones, an upstream zone comprising iron-promoted first molecular sieves and a downstream zone comprising copper-promoted second molecular sieves. The catalyst system is effective to reduce high NOx levels in the exhaust gas stream. Also described are methods for treatment of engine exhaust gas streams, comprising treating engine exhaust gas streams containing high NOx levels with catalyst systems including selective catalytic reduction articles having two zones.

公开(公告)号：CA2977523A1

公开(公告)日：2016-09-01

申请号：CA2977523

申请日：2016-02-26

Applicant: BASF CORP

Inventor： VOSS KENNETH E ,  MOHANAN JAYA L ,  HALLSTROM KEVIN A ,  SHAH SANDIP D ,  HOCHMUTH JOHN K

IPC: B01D53/56 ,  B01D53/94 ,  F01N3/10

Abstract: Described are exhaust gas treatment systems for treatment of an engine exhaust gas stream containing NOx. The exhaust gas treatment system comprises an engine, a catalyst system including a selective catalytic reduction article comprising two zones, an upstream zone comprising iron-promoted first molecular sieves and a downstream zone comprising copper-promoted second molecular sieves. The catalyst system is effective to reduce high NOx levels in the exhaust gas stream. Also described are methods for treatment of engine exhaust gas streams, comprising treating engine exhaust gas streams containing high NOx levels with catalyst systems including selective catalytic reduction articles having two zones.