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公开(公告)号：US12011690B2
公开(公告)日：2024-06-18
申请号：US17444633
申请日：2021-08-06
Inventor： Joseph Fedeyko , Anthony Ferraro , Kenneth Koehler , Dirk Reichert , Harald Scherbel , Harald Schreiber , Andrew Scullard , Thomas Yeh
CPC classification number: B01D53/885 , B01D53/8634 , B01D53/8668 , B01J20/28014 , B01D2255/911 , B01D2255/912 , B01D2257/406 , B01D2257/7025 , B01D2257/708 , B01J2220/56
Abstract: An exhaust system for the treatment of an exhaust gas comprising a species to be treated, the system comprising: a first gas inlet for providing a flow of exhaust gas; a second gas inlet for providing a flow of heated gas; a plurality of sorbent beds for releasably storing the species; one or more catalysts for decomposing the species; first and second exhaust gas outlets; and a valve system configured to establish independently for each sorbent bed fluid communication in a first or second configuration, wherein: i) in the first configuration the flow of the exhaust gas from the first gas inlet contacts a sorbent bed for storing the species and then passes to the first gas outlet; and ii) in the second configuration the flow of heated gas from the second gas inlet contacts a sorbent bed for releasing the species, passes to one of the one or more catalysts and then passes to the second exhaust gas outlet; wherein the valve system is configured to ensure that at least one sorbent bed is in the first configuration and, preferably at least one other sorbent bed is in the second configuration.
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公开(公告)号：US11959408B2
公开(公告)日：2024-04-16
申请号：US18169595
申请日：2023-02-15
Applicant: JOHNSON MATTHEY PUBLIC LIMITED COMPANY
Inventor： Kevin Doura , John Kilmartin , Jing Lu , Nicholas McNamara , Thomas Yeh
CPC classification number: F01N3/101 , B01D53/945 , B01D53/9454 , B01D53/9477 , B01J21/04 , B01J23/462 , B01D2255/1026 , B01D2255/9155 , F01N2510/068 , F01N2560/026 , F01N2610/04 , F01N2610/1406 , F01N2900/1402
Abstract: The present invention relates to a system for ammonia combustion and exhaust gas treatment, the system comprising: an internal combustion engine for combusting ammonia; and an exhaust system comprising an intake for receiving an exhaust gas from the combustion engine, an upstream injector for adding hydrogen gas to the exhaust gas and a downstream catalyst article, wherein the downstream catalyst article comprises a three-way catalyst (TWC) composition. The invention further relates to a method for the treatment of an exhaust gas from an ammonia internal combustion engine.
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公开(公告)号：US10961871B2
公开(公告)日：2021-03-30
申请号：US16465600
申请日：2017-11-29
Applicant: Johnson Matthey Public Limited Company
Inventor： Paul Andersen , Kevin Doura , Cindy Khalaf , David Repp , Thomas Yeh
Abstract: A method of extending the useful life of an aged selective catalytic reduction (SCR) catalyst bed, which catalyses the conversion of oxides of nitrogen (NOx) to dinitrogen (N2) in the presence of a nitrogenous reductant, in the exhaust gas after treatment system of a stationary source of NOx so that the exhaust gas emitted to atmosphere from the system continues to meet proscribed limits for both NOx and ammonia emissions, which method comprising the step of retrofitting an additional honeycomb substrate monolith or a plate-type substrate comprising a catalyst (ASC) for converting ammonia in exhaust gas also containing oxygen to nitrogen and water downstream of the aged SCR catalyst bed, wherein the kNOx of the honeycomb substrate monolith comprising the catalyst for converting ammonia in exhaust gas also containing oxygen to nitrogen and water is greater than or equal to 80 m/hr between 300 and 400° C. inclusive, wherein kNOx of a sample of the catalyst, which has been aged at 450° C. in 10% H2O (as steam) in air for 48 hours, is determined by a SCR activity test in a laboratory scale reactor using a gas composition of 50 ppm CO, 30 ppm NO, 36 ppm NH3, 15% O2, 8% water, 3% CO2, balance N2.
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