公开(公告)号：US20210379576A1

公开(公告)日：2021-12-09

申请号：US17303290

申请日：2021-05-26

Applicant: Johnson Matthey Public Limited Company ,  Johnson Matthey Catalysts (Germany) GmbH

Inventor： Nikki Jane AMOS-REICHERT ,  Daniel AVIS ,  Juergen BAUER ,  Yannick BIDAL ,  Guy Richard CHANDLER ,  Alexander Nicolas Michael GREEN ,  Neil GREENHAM ,  Matthew Eben HARRIS ,  Sofia LOPEZ-OROZCO ,  Joerg MUENCH ,  Paul Richard Phillips ,  Irene PIRAS

IPC: B01J37/00 ,  B01J29/76 ,  B01J37/08

Abstract: The present disclosure relates to a method for forming a catalyst article comprising: (a) forming a slurry having a solids content of up to 50 wt % by mixing together at least the following components a crystalline molecular sieve in an H+ or NH4+ form, an insoluble active metal precursor and an aqueous solvent at a temperature in the range 10 to 35° C.; (b) coating a substrate with the slurry formed in step (a); and (c) calcining the coated substrate formed in step (b) to form a catalyst layer on the substrate. The present disclosure further relates to a catalyst article, particularly a catalyst article which is suitable for use in the selective catalytic reduction of nitrogen oxides, and to an exhaust system.

公开(公告)号：US20210299643A1

公开(公告)日：2021-09-30

申请号：US17301109

申请日：2021-03-25

Applicant: JOHNSON MATTHEY PUBLIC LIMITED COMPANY

Inventor： Yannick BIDAL ,  Hai-Ying CHEN ,  Joseph FEDEYKO ,  Neil GREENHAM ,  Matthew HARRIS ,  Jing LU

IPC: B01J29/76 ,  B01J37/02 ,  B01J29/44 ,  B01J29/80 ,  B01J35/10 ,  B01J29/78 ,  B01D53/94

Abstract: The invention relates to a catalytic article comprising a substrate having an inlet and an outlet; a first coating comprising a blend of: (1) platinum on a support, and (2) a first SCR catalyst comprising a Cu- and Mn-exchanged molecular sieve; and a second coating comprising a second SCR catalyst; wherein the support comprises at least one of a zeolite or a SiO2-Al2O3 mixed oxide. The platinum may be fixed on the support in solution.

公开(公告)号：US20180280879A1

公开(公告)日：2018-10-04

申请号：US15935178

申请日：2018-03-26

Applicant: JOHNSON MATTHEY PUBLIC LIMITED COMPANY

Inventor： Heledd HOWELLS ,  David MICALLEF ,  Andrew NEWMAN ,  Neil GREENHAM

IPC: B01D53/94 ,  B01J29/78 ,  B01J29/76 ,  B01J23/42 ,  B01J35/00 ,  B01J35/04 ,  B01J37/00 ,  B01J37/02 ,  B01J37/08 ,  B01J23/63 ,  B01J29/80 ,  F01N3/20 ,  F01N3/28

Abstract: A catalyst article for treating a flow of a combustion exhaust gas comprises: a catalytically active substrate comprising one or more channels extending along an axial length thereof through which, in use, a combustion exhaust gas flows, the one or more channels having a first surface for contacting a flow of combustion exhaust gas; wherein the substrate is formed of an extruded vanadium-containing SCR catalyst material, wherein a first layer is provided on at least a portion of said first surface, wherein the first layer comprises an ammonia slip catalyst composition comprising one or more platinum group metals supported on titania, a silica-titania mixed oxide, a Ce—Zr mixed oxide, or a mixture thereof, and a second layer is provided on at least a portion of the first layer and comprises an SCR catalyst composition.