公开(公告)号：US09993772B2

公开(公告)日：2018-06-12

申请号：US15183824

申请日：2016-06-16

Applicant: Johnson Matthey Public Limited Company

Inventor： Lee Gilbert ,  Colin Newman ,  Andrew Newman ,  Mikael Larsson

IPC: B01J21/04 ,  B01J23/40 ,  B01J23/42 ,  B01J23/44 ,  B01J23/72 ,  B01J23/745 ,  B01J29/76 ,  B01J35/04 ,  B01D53/94 ,  F01N3/10 ,  F01N3/20 ,  F01N3/28 ,  F01N13/00

CPC classification number: B01D53/9468 ,  B01D53/9418 ,  B01D53/9436 ,  B01D53/944 ,  B01D53/9472 ,  B01D2255/9022 ,  B01D2255/9025 ,  B01D2255/9032 ,  B01D2255/9035 ,  F01N3/106 ,  F01N3/2066 ,  F01N13/009 ,  F01N13/0097 ,  F01N2330/06 ,  F01N2510/063 ,  F01N2510/0682 ,  F01N2510/0684 ,  F01N2570/10 ,  F01N2570/12 ,  F01N2570/14 ,  F01N2570/18 ,  F01N2610/02 ,  F01N2900/1616 ,  Y02T10/24

Abstract: A catalytic article having a flow-through substrate having an inlet, an outlet, and an axial length; an SCR zone containing a first SCR catalyst; and an oxidation zone containing (a) an ASC zone and a DOC zone or (b) a mixed ASC and DOC zone, where the oxidation zone contains an ammonia oxidation catalyst and a DOC catalyst, the SCR zone is positioned on the substrate from the inlet end and extends less than the axial length of the substrate from the inlet, the DOC zone or the mixed ASC and DOC zone is position on the substrate from the outlet end, and when the DOC zone is present, the ASC zone is located between the SCR zone and the DOC zone. In other catalytic articles, the ASC zone further comprises a DEC catalyst. Methods of using the catalytic articles in an SCR process, where the amount of ammonia slip is reduced, are also described.

公开(公告)号：US12296319B2

公开(公告)日：2025-05-13

申请号：US18493835

申请日：2023-10-25

Applicant: JOHNSON MATTHEY PUBLIC LIMITED COMPANY

Inventor： Andrew Chiffey ,  Kieran Cole ,  Oliver Cooper ,  Christopher Daly ,  Lee Gilbert ,  Robert Hanley ,  David Micallef ,  Francois Moreau ,  Paul Phillips ,  George Platt

IPC: B01J21/04 ,  B01D53/94 ,  B01J21/08 ,  B01J23/02 ,  B01J23/42 ,  B01J23/44 ,  B01J23/46 ,  B01J23/58 ,  B01J37/02 ,  F01N3/02 ,  F01N3/023 ,  F01N3/10

Abstract: A composite oxidation catalyst for use in an exhaust system for treating an exhaust gas produced by a vehicular compression ignition internal combustion engine is disclosed. The composite oxidation catalyst comprises a honeycomb flow-through substrate monolith and two catalyst washcoat zones arranged axially in series on and along the substrate surface.

公开(公告)号：US11845064B2

公开(公告)日：2023-12-19

申请号：US17594694

申请日：2020-06-26

Applicant: Johnson Matthey Public Limited Company

Inventor： Andrew Chiffey ,  Kieran John Cole ,  Oliver Cooper ,  Christopher Daly ,  Lee Gilbert ,  Robert Hanley ,  David Micallef ,  Francois Moreau ,  Paul Phillips ,  George Platt

IPC: B01J21/08 ,  B01J23/42 ,  B01J23/44 ,  B01J23/58 ,  B01J35/04 ,  B01D53/94 ,  F01N3/023 ,  F01N3/10 ,  B01J37/02

CPC classification number: B01J23/44 ,  B01J21/08 ,  B01J23/42 ,  B01J37/0215 ,  F01N3/0231 ,  F01N3/10 ,  F01N2570/10 ,  F01N2570/12 ,  F01N2570/14

Abstract: A composite oxidation catalyst (18, 20) for use in an exhaust system for treating an exhaust gas produced by a vehicular compression ignition internal combustion engine (30) and upstream of a particulate matter filter (44, 50) in the exhaust system comprises a substrate (5) having a total length L and a longitudinal axis and having a substrate surface extending axially between a first substrate end (I) and a second substrate end (O); and three or more catalyst washcoat zones (1, 2, 3; or 1, 2, 3, 4) arranged axially in series on and along the substrate surface, wherein a first catalyst washcoat zone (1) having a length L1, wherein L1

公开(公告)号：US20160367941A1

公开(公告)日：2016-12-22

申请号：US15183824

申请日：2016-06-16

Applicant: Johnson Matthey Public Limited Company

Inventor： Lee Gilbert ,  Colin Newman ,  Andrew Newman ,  Mikael Larsson

IPC: B01D53/94

CPC classification number: B01D53/9468 ,  B01D53/9418 ,  B01D53/9436 ,  B01D53/944 ,  B01D53/9472 ,  B01D2255/9022 ,  B01D2255/9025 ,  B01D2255/9032 ,  B01D2255/9035 ,  F01N3/106 ,  F01N3/2066 ,  F01N13/009 ,  F01N13/0097 ,  F01N2330/06 ,  F01N2510/063 ,  F01N2510/0682 ,  F01N2510/0684 ,  F01N2570/10 ,  F01N2570/12 ,  F01N2570/14 ,  F01N2570/18 ,  F01N2610/02 ,  F01N2900/1616 ,  Y02T10/24

Abstract: A catalytic article having a flow-through substrate having an inlet, an outlet, and an axial length; an SCR zone containing a first SCR catalyst; and an oxidation zone containing (a) an ASC zone and a DOC zone or (b) a mixed ASC and DOC zone, where the oxidation zone contains an ammonia oxidation catalyst and a DOC catalyst, the SCR zone is positioned on the substrate from the inlet end and extends less than the axial length of the substrate from the inlet, the DOC zone or the mixed ASC and DOC zone is position on the substrate from the outlet end, and when the DOC zone is present, the ASC zone is located between the SCR zone and the DOC zone. In other catalytic articles, the ASC zone further comprises a DEC catalyst. Methods of using the catalytic articles in an SCR process, where the amount of ammonia slip is reduced, are also described.

Abstract translation: 一种具有流通基底的催化制品，其具有入口，出口和轴向长度; 含有第一SCR催化剂的SCR区; 以及包含（a）ASC区和DOC区的氧化区，或（b）混合的ASC和DOC区，其中氧化区含有氨氧化催化剂和DOC催化剂，SCR区从 入口端并且从入口延伸小于基底的轴向长度，DOC区或混合ASC和DOC区从出口端位于基底上，并且当DOC区存在时，ASC区位于 SCR区和DOC区。 在其它催化剂制品中，ASC区还包含DEC催化剂。 还描述了在SCR过程中使用催化制品的方法，其中氨的滑移量减少。