公开(公告)号：US20230211323A1

公开(公告)日：2023-07-06

申请号：US17754778

申请日：2020-10-16

Applicant: Johnson Matthey Public Limited Company

Inventor： Andrew Francis CHIFFEY ,  Kieran COLE ,  Oliver COOPER ,  Christopher DALY ,  Jonas EDVARDSSON ,  Lee GILLBERT ,  Alexander GREEN ,  Neil GREENHAM ,  Robert HANLEY ,  Caitlin Lucy JENKINS ,  Per MARSH ,  David MICALLEF ,  Francois MOREAU ,  George PLATT ,  Paul Richard PHILLIPS ,  James WYLIE

IPC: B01J23/58 ,  B01J23/44 ,  B01J21/12 ,  B01J29/76 ,  B01J35/00 ,  B01J35/10 ,  F01N3/28 ,  B01D53/94

CPC classification number: B01J23/58 ,  B01J23/44 ,  B01J21/12 ,  B01J29/763 ,  B01J35/0006 ,  B01J35/1061 ,  F01N3/2828 ,  B01D53/9436 ,  B01D53/9472 ,  B01D53/9418 ,  F01N2370/04 ,  F01N2330/30 ,  F01N2510/0684 ,  B01D2255/9035 ,  B01D2258/012 ,  B01D2255/9155 ,  B01D2255/50 ,  B01D2255/20761 ,  B01D2255/20738 ,  B01D2255/2073 ,  B01D2255/1021 ,  B01D2255/1023 ,  B01D2255/2065 ,  B01D2255/9202 ,  B01D2251/2062

Abstract: A composite, zone-coated, dual-use ammonia (AMOX) and nitric oxide oxidation catalyst (12) 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); two or more catalyst washcoat zones (1; 2) comprised of a first catalyst washcoat layer (9) comprising a refractory metal oxide support material and one or more platinum group metal components supported thereon and a second catalyst washcoat layer (11) different from the first catalyst washcoat layer (9) and comprising a refractory metal oxide support material and one or more platinum group metal components supported thereon, which two or more catalyst washcoat zones (1; 2) being arranged axially in series on and along the substrate surface, wherein a first catalyst washcoat zone (1) having a length L1, wherein L1 48.8 g/l (>0.8 g/in3), wherein the particulate metal oxide is an aluminosilicate zeolite including at least one of copper, iron and manganese, wherein a total platinum group metal loading in the first catalyst washcoat zone (1) defined in grams of platinum group metal per litre of substrate volume (g/l) is different from the total platinum group metal loading in the second catalyst washcoat zone (2).

公开(公告)号：US20180058293A1

公开(公告)日：2018-03-01

申请号：US15685496

申请日：2017-08-24

Applicant: JOHNSON MATTHEY PUBLIC LIMITED COMPANY

Inventor： Per MARSH ,  Andrew NEWMAN ,  Christopher SMITH

IPC: F01N3/20 ,  F01N3/08 ,  F01N3/10 ,  F01N3/035 ,  F01N13/00 ,  B01D53/94 ,  B01J29/85 ,  B01J29/76

CPC classification number: F01N3/2066 ,  B01D53/9418 ,  B01D53/944 ,  B01D2255/20761 ,  B01J29/763 ,  B01J29/85 ,  F01N3/035 ,  F01N3/0814 ,  F01N3/0842 ,  F01N3/106 ,  F01N3/208 ,  F01N13/009 ,  F01N13/0093 ,  F01N2370/04 ,  F01N2510/063 ,  F01N2610/02 ,  F01N2610/1453 ,  F01N2610/146 ,  Y02T10/24

Abstract: Systems and methods related to an exhaust gas purification system comprising: an injector for injecting ammonia or a compound decomposable to ammonia into the exhaust gas, positioned downstream of an engine; a Cu-SCR catalyst positioned downstream of the injector, wherein no oxidation catalysts exist between the Cu-SCR catalyst and the engine; wherein the exhaust gas entering the Cu-SCR catalyst comprises an NH3/NOx ratio of less than 1.2.