Possibilities of Ammonia as Both Fuel and NO<sub>x</sub> Reductant in Marine Engines: A Numerical Study
Nowadays, the environmental impact of shipping constitutes an important challenge. In order to achieve climate neutrality as soon as possible, an important priority consists of progressing on the decarbonization of marine fuels. Free-carbon fuels, used as single fuel or in a dual-fuel mode, are gain...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-01-01
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| Series: | Journal of Marine Science and Engineering |
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| Online Access: | https://www.mdpi.com/2077-1312/10/1/43 |
| _version_ | 1797492937088565248 |
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| author | Carlos Gervasio Rodríguez María Isabel Lamas Juan de Dios Rodríguez Amr Abbas |
| author_facet | Carlos Gervasio Rodríguez María Isabel Lamas Juan de Dios Rodríguez Amr Abbas |
| author_sort | Carlos Gervasio Rodríguez |
| collection | DOAJ |
| description | Nowadays, the environmental impact of shipping constitutes an important challenge. In order to achieve climate neutrality as soon as possible, an important priority consists of progressing on the decarbonization of marine fuels. Free-carbon fuels, used as single fuel or in a dual-fuel mode, are gaining special interest for marine engines. A dual fuel ammonia-diesel operation is proposed in which ammonia is introduced with the intake air. According to this, the present work analyzes the possibilities of ammonia in marine diesel engines. Several ammonia-diesel proportions were analyzed, and it was found that when the proportion of ammonia is increased, important reductions of carbon dioxide, carbon monoxide, and unburnt hydrocarbons are obtained, but at the expense of increments of oxides of nitrogen (NO<sub>x</sub>), which are only low when too small or too large proportions of ammonia are employed. In order to reduce NO<sub>x</sub> too, a second ammonia injection along the expansion stroke is proposed. This measure leads to important NO<sub>x</sub> reductions. |
| first_indexed | 2024-03-10T01:12:48Z |
| format | Article |
| id | doaj.art-ff145fd57bc343f28cd13380d3dfb5ae |
| institution | Directory Open Access Journal |
| issn | 2077-1312 |
| language | English |
| last_indexed | 2024-03-10T01:12:48Z |
| publishDate | 2022-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Marine Science and Engineering |
| spelling | doaj.art-ff145fd57bc343f28cd13380d3dfb5ae2023-11-23T14:16:04ZengMDPI AGJournal of Marine Science and Engineering2077-13122022-01-011014310.3390/jmse10010043Possibilities of Ammonia as Both Fuel and NO<sub>x</sub> Reductant in Marine Engines: A Numerical StudyCarlos Gervasio Rodríguez0María Isabel Lamas1Juan de Dios Rodríguez2Amr Abbas3Nautical Sciences and Marine Engineering Department, University of A Coruña, Mendizabal s/n, 15403 Ferrol, A Coruña, SpainNautical Sciences and Marine Engineering Department, University of A Coruña, Mendizabal s/n, 15403 Ferrol, A Coruña, SpainIndustrial Engineering Department, University of A Coruña, Mendizabal s/n, 15403 Ferrol, A Coruña, SpainDepartment of Mechanical Engineering, Mississippi State University, Starkville, MS 39762, USANowadays, the environmental impact of shipping constitutes an important challenge. In order to achieve climate neutrality as soon as possible, an important priority consists of progressing on the decarbonization of marine fuels. Free-carbon fuels, used as single fuel or in a dual-fuel mode, are gaining special interest for marine engines. A dual fuel ammonia-diesel operation is proposed in which ammonia is introduced with the intake air. According to this, the present work analyzes the possibilities of ammonia in marine diesel engines. Several ammonia-diesel proportions were analyzed, and it was found that when the proportion of ammonia is increased, important reductions of carbon dioxide, carbon monoxide, and unburnt hydrocarbons are obtained, but at the expense of increments of oxides of nitrogen (NO<sub>x</sub>), which are only low when too small or too large proportions of ammonia are employed. In order to reduce NO<sub>x</sub> too, a second ammonia injection along the expansion stroke is proposed. This measure leads to important NO<sub>x</sub> reductions.https://www.mdpi.com/2077-1312/10/1/43ammoniaemissionsdecarbonizationmarine engines |
| spellingShingle | Carlos Gervasio Rodríguez María Isabel Lamas Juan de Dios Rodríguez Amr Abbas Possibilities of Ammonia as Both Fuel and NO<sub>x</sub> Reductant in Marine Engines: A Numerical Study Journal of Marine Science and Engineering ammonia emissions decarbonization marine engines |
| title | Possibilities of Ammonia as Both Fuel and NO<sub>x</sub> Reductant in Marine Engines: A Numerical Study |
| title_full | Possibilities of Ammonia as Both Fuel and NO<sub>x</sub> Reductant in Marine Engines: A Numerical Study |
| title_fullStr | Possibilities of Ammonia as Both Fuel and NO<sub>x</sub> Reductant in Marine Engines: A Numerical Study |
| title_full_unstemmed | Possibilities of Ammonia as Both Fuel and NO<sub>x</sub> Reductant in Marine Engines: A Numerical Study |
| title_short | Possibilities of Ammonia as Both Fuel and NO<sub>x</sub> Reductant in Marine Engines: A Numerical Study |
| title_sort | possibilities of ammonia as both fuel and no sub x sub reductant in marine engines a numerical study |
| topic | ammonia emissions decarbonization marine engines |
| url | https://www.mdpi.com/2077-1312/10/1/43 |
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