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Swiss Airlines Pioneers Use of Solar Fuel from Synhelion

Swiss Airlines Pioneers Use of Solar Fuel from Synhelion
Swiss International Air Lines (Swiss) has become the first airline globally to incorporate solar fuel produced by the Swiss cleantech company Synhelion into its regular flight operations. This groundbreaking development marks a significant advancement in sustainable aviation, underscoring the increasing importance of alternative fuels in reducing the sector’s dependence on fossil resources.
A Milestone in Sustainable Aviation
The initial delivery involved a 190-liter barrel of synthetic crude oil manufactured at Synhelion’s DAWN facility. This crude was transported to a refinery in northern Germany, where it was processed into certified Jet-A-1 aviation fuel, adhering to the stringent quality standards of the industry. The refined solar fuel was subsequently introduced into the fuel supply system at Hamburg Airport. Although the volume supplied—sufficient to cover approximately seven percent of the fuel required for a flight between Hamburg and Zurich—is modest, its symbolic and practical significance is considerable. Both Swiss and Synhelion have described this achievement as a “powerful start,” demonstrating the technical viability and compatibility of solar kerosene with existing aviation infrastructure.
This accomplishment is the culmination of a long-term partnership and strategic investment in innovative technology. Jens Fehlinger, CEO of Swiss, highlighted the importance of this milestone, stating, “This first delivery of solar fuel from Synhelion marks another important milestone in our long-standing partnership. For the first time, we are using solar fuel in civil aviation. We are proud to be a pioneer in advancing a key technology for more sustainable aviation together with Synhelion.”
The Technology Behind Solar Fuel
Synhelion’s process employs a thermochemical method that harnesses concentrated solar energy to generate the high temperatures necessary for converting water and carbon dioxide into syngas. This syngas is then transformed into synthetic crude oil through a process akin to the Fischer-Tropsch synthesis. The resulting crude oil can be refined in conventional facilities to produce jet fuel and other hydrocarbons, enabling seamless integration with current fuel supply chains.
Despite this breakthrough, challenges remain. The production costs of solar fuel are currently high, and significant adjustments to supply chains will be required to facilitate broader adoption. Nevertheless, the aviation industry has responded positively, recognizing the environmental benefits and the potential for substantial reductions in carbon emissions. This development has ignited wider discussions about the future of sustainable aviation and the critical role renewable energy will play in the sector.
Competitors are closely observing Swiss’s progress, with expectations of increased investments in sustainable aviation fuels and new partnerships with renewable energy companies to develop similar technologies. The successful deployment of solar fuel by Swiss not only confirms its technical readiness but also signals its potential to drive transformative change across the aviation industry.
As Swiss Airlines continues to deepen its collaboration with Synhelion, this milestone highlights both the promise and the complexities of transitioning to renewable energy in aviation—a vital step toward a more sustainable future for air travel.

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