Bullerdiek, NilsNilsBullerdiekVoß, SteffenSteffenVoßNeuling, UlfUlfNeulingKaltschmitt, MartinMartinKaltschmitt2022-05-242022-05-242022International Journal of Sustainable Aviation 8 (3): 1 (2022)http://hdl.handle.net/11420/12707To support renewable energy utilisation in aviation apart from kerosene-based sustainable aviation fuel (SAF), a direct use of renewable alcohols (methanol, ethanol, propanol, butanol, pentanol) is analysed and compared to their use as alcohol-to-jet (ATJ) conversion intermediates. The energy demands in the form of alcohol and operational payload-range implications are analysed for two aircraft types, using a Breguet range equation and a mass/energy balance approach. From an energetic perspective a direct alcohol usage is significantly more efficient compared to the ATJ pathway requiring 40 to 60 % more alcoholic energy. Even considering low process losses and high kerosene fractions (95 %), the ATJ conversion still requires about 16 % (26 % for methanol) more alcoholic energy. Especially methanol and ethanol lead to significant payload-range losses compared to kerosene of approx. 70 % and 50 %. These effects are less significant for propanol, butanol, and pentanol with range reductions of 40 %, 30 %, and 25 %.en2050-0475202231Inderscience EnterprisesSustainable aviation fuels (SAF)alcohol-to-jet (AtJ)payload-rangemethanolethanolIngenieurwissenschaftenJournal Article10.1504/IJSA.2022.10046511Other