SAF production pathways

Sustainable aviation fuel (SAF) is generally referred to as aviation fuel derived from nonfossil sources, or feedstock which has been cultivated and processed in a way that works to close the carbon cycle. Consequently, the use of SAF significantly reduces carbon emissions and results in a reduction of life cycle emissions relative to conventional aviation fuel.

According to the United Nations International Civil Aviation Organization (ICAO), 11 SAF production processes have been approved and certified by ASTM International (formerly known as American Society for Testing and Materials) (see Table below) and 11 others are currently under evaluation as at the end of December 2024.