Analysis of the influence of the n-hexane content in the mixture with rapeseed oil on the auto-ignition delay angle of the fuel
Artykuł w czasopiśmie
| Status: | |
| Autorzy: | Sander Przemysław, Longwic Rafał, Tarkowski Sławomir |
| Dyscypliny: | |
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| Wersja dokumentu: | Drukowana | Elektroniczna |
| Język: | angielski |
| Strony: | 3 - 10 |
| Bazy: | BazTech |
| Efekt badań statutowych | NIE |
| Materiał konferencyjny: | NIE |
| Publikacja OA: | TAK |
| Licencja: | |
| Sposób udostępnienia: | Otwarte czasopismo |
| Wersja tekstu: | Ostateczna wersja opublikowana |
| Czas opublikowania: | W momencie opublikowania |
| Data opublikowania w OA: | 14 listopada 2025 |
| Abstrakty: | angielski |
| Increasing emission-reduction requirements and EU renewable-energy targets have created a demand for biofuels that can be operated in diesel engines without modification. Current production routes – FAME and HVO – although markedly improving the physicochemical properties of rapeseed oil, are carried out in capital- intensive industrial plants and depend on continuous feedstock supply. To simplify the production chain, rapeseed oil was diluted with the inert hydrocarbon n-hexane; the resulting decrease in viscosity and flash point facilitated spray formation and ignition initiation. The effect of n-hexane content (v/v) in blends with rapeseed oil on the ignition-delay angle in a direct-injection diesel engine was analysed. Cylinder-pressure traces were used to determine the crank-angle interval between the start of injection and the start of combustion, and the results were compared with data for commercial diesel fuel and neat rapeseed oil. A progressive increase in the n-hexane fraction was found to shorten the ignition-delay angle relative to neat rapeseed oil, bringing it closer to the value observed for diesel fuel. The results confirm the suitability of the investigated blends as an alterna- tive fuel and indicate that they can be used in currently operated diesel engines without costly modifications. |
