Stability, rheological and combustion properties of biodiesel blends with a very-low sulfur fuel oil (VLSFO)

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Abstract

In this study the rheological and combustion properties were evaluated for a very low sulfur fuel oil (VLSFO) with biodiesel added at concentrations of 5, 10, 15 and 20 wt%. The samples were prepared via hand stirring, and blend uniformity was confirmed via sulfur and heat of combustion measurements. Evaluations based on the ASTM D4740 protocols confirmed blend stability (no evidence of visible asphaltene precipitation). The viscosity was significantly reduced with increased biodiesel content, while the boundary lubricity was notably improved by adding 5 wt% biodiesel. Analysis of the combustion results showed that 15–20 wt% biodiesel additions mitigated the premixed-burn spike phenomena observed for VLSFO. Biodiesel concentrations up to 15 wt% were also effective at improving the estimated cetane number and reducing the main combustion delay time and the precombustion burn period. The combination of good blend stability, reduced viscosity, and acceptable combustion properties for low blend levels suggests that biodiesel is suitable for use as a marine fuel for engines that operate on VLSFO.

Original languageEnglish
Article number123365
JournalFuel
Volume316
DOIs
StatePublished - May 15 2022

Funding

This work was funded by the Bioenergy Technologies Office of the U. S. Department of Energy. This manuscript has been authored by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan ( http://energy.gov/downloads/doe-public-access-plan) . This work was funded by the Bioenergy Technologies Office of the U. S. Department of Energy (DOE). This manuscript has been authored by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. The authors would like to thank our program sponsor at DOE, Josh Messner and the contributions of two anonymous reviewers, whose input greatly improved this manuscript.

FundersFunder number
U.S. Department of EnergyDE-AC05-00OR22725

    Keywords

    • Biodiesel
    • Combustion
    • Heavy fuel oil
    • Lubricity
    • Residual fuel oil
    • Rheology
    • Stability
    • Very low sulfur fuel oil
    • Viscosity

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