Exhaust gas aftertreatment system in an exhaust gas system of an ammonia combustion engine, method for exhaust gas aftertreatment, and use of an N2O decomposition catalyst
JP2025523672A5Pending Publication Date: 2026-06-22HUG ENG
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Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- HUG ENG
- Filing Date
- 2023-06-14
- Publication Date
- 2026-06-22
AI Technical Summary
Technical Problem
Ammonia combustion engines produce exhaust gases containing nitrous oxide (N2O), which has a greenhouse effect 250 times greater than carbon dioxide, necessitating a solution to minimize its emission.
Method used
An exhaust gas aftertreatment system comprising a passive SCR catalyst, oxidation catalyst, and N2O decomposition catalyst, optimized for ammonia combustion engines, to convert N2O into environmentally compatible substances.
Benefits of technology
Effectively reduces N2O emissions by chemically converting it into nitrogen and water, ensuring minimal environmental impact.
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Abstract
An exhaust gas system of an ammonia combustion engine, in the exhaust gas aftertreatment system in the exhaust gas system through which the exhaust gas flow of the ammonia combustion engine can pass, includes a passive SCR catalyst (14), an oxidation catalyst (16) capable of oxidizing ammonia contained in the exhaust gas flow, and a controlled SCR catalyst (22). The oxidation catalyst (16) is disposed in the exhaust gas system downstream of the passive SCR catalyst (14), and the controlled SCR catalyst (22) is disposed in the exhaust gas system downstream of the oxidation catalyst (16). The exhaust gas aftertreatment system further includes at least one N2O decomposition catalyst (24) disposed in the exhaust gas system upstream of the passive SCR catalyst (14) or downstream of the passive SCR catalyst (14), the oxidation catalyst (16), and / or the controlled SCR catalyst (22). In addition, a method for exhaust gas aftertreatment and the use of an N2O decomposition catalyst (24) are shown.
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