公开(公告)号：ZA201707086B

公开(公告)日：2021-04-28

申请号：ZA201707086

申请日：2017-10-19

Applicant: BASF CORP

Inventor： YANG XIAOFAN ,  XUE WEN-MEI ,  HOCHMUTH JOHN ,  SCHLADT MATTHEW ,  LI YUEJIN

Abstract: Described are exhaust gas treatment systems for treatment of a gasoline engine exhaust gas stream containing NOx, particulate matter, and sulfur. The exhaust gas treatment system comprises: one or more catalytic articles selected from a three-way conversion catalyst (TWC), a lean NOx trap (LNT), and an integrated LNT-TWC; a platinum-containing catalytic article downstream from the one or more catalytic articles; and one or more selective catalytic reduction (SCR) catalytic articles immediately downstream from the platinum-containing catalytic article, the one or more SCR catalytic articles including a molecular sieve. The system stabilizes the SCR catalytic article from poisoning by sulfur.

公开(公告)号：ZA201700236B

公开(公告)日：2020-05-27

申请号：ZA201700236

申请日：2017-01-11

Applicant: BASF CORP

Inventor： TRUKHAN NATALIA ,  MÜLLER ULRICH ,  BREEN MICHAEL ,  SLAWSKI BARBARA ,  FU QI ,  MOHANAN JAYA L ,  HOCHMUTH JOHN K ,  KRAUS MARTIN W ,  MOINI AHMAD ,  YANG XIAOFAN

Abstract: Described is a selective catalytic reduction material comprising a spherical particle including an agglomeration of crystals of a molecular sieve. The catalyst is a crystalline material that is effective to catalyze the selective catalytic reduction of nitrogen oxides in the presence of a reductant at temperatures between 200 °C and 600 °C. A method for selectively reducing nitrogen oxides and an exhaust gas treatment system are also described.

公开(公告)号：CA3023823A1

公开(公告)日：2017-11-16

申请号：CA3023823

申请日：2017-05-09

Applicant: BASF CORP

Inventor： YANG XIAOFAN ,  CAUDLE MATTHEW TYLER

IPC: B01J35/00 ,  B01D53/86 ,  B01J23/10 ,  F01N3/20

Abstract: The invention provides a catalyst composition, including a mixture of catalytically active particles and a magnetic material, such as superparamagnetic iron oxide nanoparticles, capable of inductive heating in response to an applied alternating electromagnetic field. The catalytically active particles will typically include a base metal, platinum group metal, oxide of base metal or platinum group metal, or combination thereof, and will be adapted for use in various catalytic systems, such as diesel oxidation catalysts, catalyzed soot filters, lean NOx traps, selective catalytic reduction catalysts, ammonia oxidation catalysts, or three- way catalysts. The invention also includes a system and method for heating a catalyst material, which includes a catalyst article that includes the catalyst composition and a conductor for receiving current and generating an alternating electromagnetic field in response thereto, the conductor positioned such that the generated alternating electromagnetic field is applied to at least a portion of the magnetic material.

公开(公告)号：CA2996032A1

公开(公告)日：2017-03-02

申请号：CA2996032

申请日：2016-08-18

Applicant: BASF CORP ,  N E CHEMCAT CORP

Inventor： ZHENG XIAOLAI ,  DEEBA MICHEL ,  YANG XIAOFAN ,  FU QI ,  WASSERMANN KNUT ,  NAGATA MAKOTO ,  KANNO YASUHARU ,  NAKAYAMA HIROKI

IPC: B01J29/064 ,  B01J23/34 ,  B01J23/74 ,  B01J29/72 ,  B01J29/85 ,  F01N3/20

Abstract: Described are catalysts effective to abate NOx, hydrocarbons, and carbon monoxide from a gasoline engine exhaust gas. Such catalysts include a substrate having a first and second material disposed thereon, the first material effective to catalyze selective catalytic reduction of nitrogen oxides in the presence of ammonia and the second material effective to abate hydrocarbons and carbon monoxide, the first material comprising a molecular sieve promoted with copper and/or iron in a low loading, the second material comprising at least one oxide of Ni, Fe, Mn, Co, and Cu on a support selected from oxides of Ce, Ce-Zr, Zr, Mn, Pr and combinations thereof. Also described are gasoline engine exhaust gas treatment systems and methods of treating exhaust gas from a gasoline engine.

公开(公告)号：CA2952437A1

公开(公告)日：2015-12-23

申请号：CA2952437

申请日：2015-06-17

Applicant: BASF CORP

Inventor： YANG XIAOFAN ,  HOCHMUTH JOHN K ,  XUE WEN-MEI ,  WANG XIAOMING ,  CAUDLE MATTHEW TYLER ,  MOINI AHMAD ,  HOLLOBAUGH DUSTIN O ,  FU QI ,  BREEN MICHAEL

IPC: B01J29/06 ,  B01J29/16 ,  B01J29/20

Abstract: Described is a selective catalytic reduction catalyst comprising a zeolitic framework material of silicon and aluminum atoms, wherein a fraction of the silicon atoms are isomorphously substituted with a tetravalent metal. The catalyst can include a promoter metal such that the catalyst effectively promotes the reaction of ammonia with nitrogen oxides to form nitrogen and H20 selectively over a temperature range of 150 to 650 °C. In another aspect, described is a selective catalytic reduction composite comprising an SCR catalyst material and an ammonia storage material comprising a transition metal having an oxidation state of IV. The SCR catalyst material promotes the reaction of ammonia with nitrogen oxides to form nitrogen and H20 selectively over a temperature range of 150 °C to 600 °C, and the SCR catalyst material is effective to store ammonia at temperatures of 400 °C and above. A method for selectively reducing nitrogen oxides, and a method for simultaneously selectively reducing nitrogen oxide and storing ammonia are also described. Additionally, an exhaust gas treatment system is also described.