|
Biofuels are one of the short-term alternatives for reducing the well-to-wheel greenhouse gas footprintof transport. In the framework of compression-ignition engine fuels. This study investigates the feasi-bility of using cold-pressed rapeseed oil as a biocomponent, admixed with distilled tyre pyrolytic oil, asan energy-efficient alternative to commonly considered methyl ester-based mixtures in diesel fuel.Selected ternary and binary fuel blends are subjected to engine tests. Their scope covers 80% of theengine map and aims at identifying tradeoffs between fuel composition, engine performance andemissions. The results show that fuel mixtures containing a large fraction of rapeseed oil (up to 55% byvolume) can be effectively combusted when pyrolytic oil distillate is introduced as the additive. Thedeterioration in brake efficiency for such fuel does not exceed 1.2% with respect to diesel baseline. At thesame time, the results are superior in terms of both efficiency and emissions when compared to FAME-based biodiesel. Finally, with indicated efficiencies on a similar level as the diesel baseline, suggestingimproved burning rate with pyrolytic oil addition, the study identifies parasitic losses in fuel injectionequipment as a significant contributor to the overall efficiency penalty for the examined ternarymixtures.
|
