Used sunflower oil as an alternative fuel for diesel engines

K. Baris Cigizoǧlu*, Turgut Özaktas, Filiz Karaosmanoǧlu

*Corresponding author for this work

Research output: Contribution to specialist publicationArticle

36 Citations (Scopus)


Used sunflower oil was blended with grade No. 2-D diesel fuel at a ratio of 20 / 80 (v / v). The fuel blend was tested in a diesel engine with a precombustion chamber at speeds between 1200 and 2100 rpm. The fuel blend and the diesel fuel were rated according to standard test methods. It was found that for short-term use the fuel blend has characteristics similar to those of the baseline diesel fuel and that it displayed less smoke emission than the diesel fuel.

Original languageEnglish
Number of pages8
Specialist publicationEnergy Sources
Publication statusPublished - 1997


Keywords biofuel for diesel engines, fuel blend, smoke emissions, sunflower oil, used sunflower oil, vegetable oil fuels Oil, wax, resin, and other solvent soluble compounds occur in all plants. Oleaginous materials can constitute up to 40-50% of biomass and are relatively easily extracted. Such substances sustain major world industries and serve as food, animal feed, food additives, fragrances, and raw materials for a wide range of manufac- tured goods (Boyles, 1984). Use of plant oils as compression-ignition engine fuel has been investigated by many researchers during the last decade. In short-term engine performance tests of less than 10 hours' duration, the vegetable oils performed quite well. Problems occur only after the engine has been operating on the vegetable oil for longer periods of time and are far more pronounced in direct injection engines than in the less efficient engines having precombustion chambers (indirect injection). The two most important causes of problems are the high viscosity and low volatility of the vegetable oils. Problems arising with the direct Received 25 May 1996; accepted 24 June 1996. The authors thank the Research Fund of Istanbul Technical University for financial support. Address correspondence to K. Baris Cigizoglu, Chemical Engineering Department, Istanbul Technical University, Maslak, 80626 Istanbul, Turkey.

FundersFunder number
Istanbul Teknik Üniversitesi


    • Biofuel for diesel engines
    • Fuel blend
    • Smoke emissions
    • Sunflower oil
    • Used sunflower oil
    • Vegetable oil fuels


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