Study: SAF Reduces Aircraft Contrails, Soot Particle Emissions

When compared to jet-A-1 fuel, SAF significantly reduces the climate-warming effect of condensation trails, according to the findings.

Meg Godlewski

Friday, June 07, 2024 at 11:20 AM ET

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Edited By: tccjeremy

A350 flight test aircraft followed by DLR chase plane during ECLIF3 flight campaign. [Courtesy: Airbus]

Key Takeaways:

A new study (ECLIF3) found that using 100 percent Sustainable Aviation Fuel (SAF) can significantly reduce the climate impact of contrails, in addition to its carbon footprint reduction benefits.
Test flights showed a 56 percent reduction in contrail ice crystals when 100 percent SAF was used compared to conventional jet fuel, which could substantially lessen the climate-warming effect of condensation trails.
This reduction is due to SAFs, particularly those with fewer aromatics, producing less soot in emissions, thereby forming fewer ice crystals in contrails.
Contrails, a non-carbon dioxide effect, account for a significant proportion of aviation's overall climate impact, making this finding crucial for decarbonizing air transport.

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The use of 100 percent sustainable aviation fuel (SAF) in commercial airliners may reduce the impact of contrails in addition to reducing the aircraft’s carbon footprint, according to a new study.

The “Emission and Climate Impact of Alternative Fuels,” or ECLIF3 study, was conducted through a collaboration with Airbus, Rolls-Royce, the German Aerospace Center (DLR), and SAF producer Neste.