WO2026093716 - HYDROGEN PROMOTED SCR CATALYST DESULPHATION
National phase entry is expected:
Publication Number
WO/2026/093716
Publication Date
07.05.2026
International Application No.
PCT/GB2025/052324
International Filing Date
23.10.2025
Title **
[English]
HYDROGEN PROMOTED SCR CATALYST DESULPHATION
[French]
DÉSULFATATION DE CATALYSEUR RCS FAVORISÉE PAR L'HYDROGÈNE
Applicants **
JOHNSON MATTHEY PUBLIC LIMITED COMPANY
Inventors
MILLINGTON, Paul James
RUGGERI, Maria Pia
Priority Data
24209601.4
29.10.2024
EP
Application details
| Total Number of Claims/PCT | * |
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International Searching Authority |
EPO
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| Recordal of a Change of the Applicant's Name/Address |
Change of Applicant's Name and Address
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| Type of Assignment |
The Standard Agent's Assignment
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| Applicant's Legal Status |
Legal Entity
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| Entry into National Phase under |
Chapter I
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| Patent Delivery |
Send the Letters Patent by Courier
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| Translation |
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Quotation for National Phase entry
| Country | Stages | Total | |
|---|---|---|---|
| China | Filing, Examination, Granting | 1988 | |
| EPO | Filing, Examination, Granting | 8193 | |
| Japan | Filing, Examination, Granting | 2110 | |
| South Korea | Filing, Examination, Granting | 1933 | |
| USA | Filing, Examination, Granting | 4740 |
Total:
18,964
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Abstract[English]
in the exhaust gas using a nitrogenous reductant. The SCR catalyst is liable to become sulphated in use. The system (12) also comprises a controller (26) that is configured, when in use, e.g. pre-programmed, to apply a desulphation treatment to the SCR catalyst (16) when it is determined that the SCR catalyst (16) is sulphated, thereby to increase NOx conversion activity of a sulphated SCR catalyst (16). The desulphation treatment comprises providing hydrogen gas in the exhaust gas stream upstream of the sulphated SCR catalyst (16), in a predetermined concentration sufficient to promote removal of sulphur from the sulphated SCR catalyst at a predetermined contact temperature.[French]
dans les gaz d'échappement à l'aide d'un réducteur azoté. Le catalyseur RCS est susceptible de devenir sulfaté lors de l'utilisation. Le système (12) comprend également un dispositif de commande (26) qui est conçu, lors de l'utilisation, par exemple préprogrammé, pour appliquer un traitement de désulfatation au catalyseur RCS (16) lorsqu'il est déterminé que le catalyseur RCS (16) est sulfaté, ce qui permet d'augmenter l'activité de conversion de NOx d'un catalyseur RCS sulfaté (16). Le traitement de désulfatation consiste à fournir de l'hydrogène gazeux dans le flux de gaz d'échappement en amont du catalyseur RCS sulfaté (16), à une concentration prédéterminée suffisante pour favoriser l'élimination du soufre du catalyseur RCS sulfaté à une température de contact prédéterminée.