Performance evaluation of gasoline alternatives using a detailed thermodynamic spark-ignition engine model

In light of the climate change and the fact that surface transportation heavily relies on internal combustion engines, many different alternatives to gasoline have been proposed. Herein, we present a model which allows a quick assessment of the suitability of a certain molecule as replacement for gasoline. Using a global sensitivity analysis, the elemental composition and the vapor heat capacity have been identified as main influencing fuel parameters. A case study using the currently proposed alternative fuels (methanol, ethanol, n-butanol, imethylfuran, methylfuran, α-pinene) as well as gasoline and several ydrocarbons (cyclohexane, n-heptane, isooctane, benzene) revealed n-butanol as best performing alternative fuel. The use of this compound entails a significant decrease in CO2 emissions and an increased efficiency, but also a higher consumption in comparison with gasoline.

Gschwend, D., Soltic, P., Edinger, P., Wokaun, A., & Vogel, F. (2017). Performance Evaluation of Gasoline Alternatives Using a Thermodynamic Spark-Ignition Engine Model. Sustainable Energy & Fuels. doi:10.1039/C7SE00276A