A structured review of alternative fuel capabilities

Hydrogen and Sustainable Aviation Fuels (SAF) as fuels for aircrafts might be suitable mitigation measures to reduce emissions in the troposphere and therefore environmental impact. As a focus is put on technological feasibility today, one should also be interested in the emissions and quantifying the exact benefits and impacts of burning hydrogen as a fuel. The same is true for SAF. Because of different reactants and the making process the chemical mixture of SAF is (willingly) different from Jet A-1 which results in other emissions. More precisely, sulfur is missing in SAF and there is no reaction to causing sulfur oxides. It is said that SAF causes less environmental impact than Jet A-1, but there is no statement of how the emissions of those fuels will differ. For hydrogen, the emissions themselves seem easier to model as the emissions are not a mixture but water only for an ideal burning process. Nitrogen oxides and unburnt hydrogen will be products in a real burning process as well. Since there is not much research yet, an overview of existing approaches for modeling height and climate-dependent emissions caused by hydrogen and SAFs shall be presented. Most common are emission indices for modelling, but those are hardly investigated for pure hydrogen and SAF, while for Jet A-1 it is the common and acknowledged method. The paper will review existing literature for modelling hydrogen as well as SAF by emission indices.

Subjects

Hydrogen

Sustainable Aviation Fuel

DDC Class

333.7: Natural Resources, Energy and Environment

620: Engineering

Publication version

publishedVersion

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https://creativecommons.org/licenses/by/4.0/

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Poster_Delft.pdf

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101.3 KB

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Adobe PDF

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A structured review of alternative fuel capabilities