Surrogate Generation and Evaluation for Biodiesel and Its Mixtures with Fossil Diesel

Anton Reiter, Nikolai Schubert, Pfennig Andreas, Thomas Wallek

Research output: Contribution to journalArticlepeer-review


In this paper a precedently developed surrogate optimization algorithm for fossil fuels, which originally allowed
simultaneous fitting of the true boiling point (TBP) curve, the liquid density at 15 °C, and the cetane number, is refined toward
its application to biodiesel and its mixtures with fossil diesel. For this purpose, the algorithm is extended (1) to also include fitting
of the kinematic viscosity at 40 °C and (2) to account for peculiarities of biodiesel concerning its narrow boiling range and
compensation of systematic errors of measured boiling curves. To illustrate these improvements, first, the algorithm is applied to
property estimation and surrogate optimization of three different biodiesel fuels, for which surrogates consisting of one to three
components are proposed. Second, a surrogate for a commercial European fossil diesel is calculated and produced in lab-scale.
Finally, the algorithm is used for surrogate optimization and property estimation of mixtures of biodiesel and fossil diesel,
considering fractions of biodiesel of 7% and 20% per volume. It is shown that the improved algorithm is capable of reliably
optimizing surrogates for fuels containing both biogenic and fossil components.
Original languageEnglish
Pages (from-to)6173−6181
JournalEnergy & Fuels
Issue number6
Publication statusPublished - 2 May 2017

Fields of Expertise

  • Mobility & Production

Treatment code (Nähere Zuordnung)

  • Basic - Fundamental (Grundlagenforschung)


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