Alternative fuels and emissions

This CleanTech Hub focus area will present a selection of Lufthansa Group initiatives on the topic of sustainable aviation fuels, emissions reduction and climate research.

Even though the commonly known fossil kerosene will remain the main fuel in aviation for the next decade, sustainable fuels offer a valuable perspective for the future.

Sustainable Aviation Fuel

Sustainable Aviation Fuel (SAF) is produced without fossil energy sources and is based on biogenic origins or renewable
energy. Thereby SAF reduces related carbon emissions by around 80% in comparison to fossil fuel. Sustainable Aviation Fuel is comparable to fossil kerosene in terms of quality and performance, is compatible with conventional engines and can use existing infrastructure for storage and supply.


The Lufthansa Group is one of the largest purchasers of SAF from biogenic residues.

In 2021, we have secured further sustainable fuel for a quarter of a billion U.S. dollars - the largest pure sustainability investment in the history of the Lufthansa Group to date.

Press release


Green hydrogen

Another longer-term fuel alternative is the use of green hydrogen produced exclusively with renewable energy. Using hydrogen as a fuel would make propulsion carbon-free. Thus, to get commercial aircraft powered by climate-friendly hydrogen into the skies, building the appropriate infrastructure and developing the flying fuel cell, as well as integrating both components into an aircraft, is elementary and still requires a lot of research. 

Selected projects and products

CO2- and Non-CO2 research

The Lufthansa Group has been a reliable partner of climate research since 1994 and has since equipped several aircraft with special measuring instruments. In addition to carrying passengers, these aircraft are also in the service of climate research.

Selected projects and products