Role of synthetic jet fuel in cutting aviation emissions
Synthetic jet fuels, produced from low-carbon hydrogen and captured CO2, can significantly reduce lifecycle emissions from aviation when made with renewable electricity and sustainable CO2 sources. They are chemically similar to conventional jet fuel and can often be used in existing aircraft engines without modification.
How synthetic jet fuel helps
- Drop-in compatibility: synthetic kerosene can meet the technical specifications for jet engines and fuel systems, enabling immediate use in commercial flights.
- Lower lifecycle emissions: if produced with renewable electricity and CO2 captured from the air or industrial sources, lifecycle greenhouse gas emissions can be far lower than fossil jet fuel.
- Fuel quality improvements: synthetic processes can yield fuels with fewer impurities, potentially improving engine performance and reducing maintenance.
Limitations and considerations
- Energy intensity: producing synthetic jet fuel is energy-intensive. Large amounts of renewable electricity are required to make hydrogen and drive synthesis processes.
- Cost: currently more expensive than conventional jet fuel; early adoption will rely on policy support, mandates, or carbon pricing.
- Supply scale: aviation requires vast quantities of fuel; replacing a significant fraction of global jet fuel with synthetic alternatives requires massive renewable and production capacity expansion.
Complementary strategies
E-fuels are one part of a broader aviation decarbonization strategy that includes:
- Improved aircraft efficiency and aerodynamics.
- Sustainable aviation fuels from biofeedstocks where feasible.
- Operational improvements and air traffic management.
- Long-term technological shifts such as electric or hydrogen-powered aircraft for short-haul routes.
Outlook
Synthetic jet fuel offers a viable route to reduce emissions for long-haul flights where battery electric options are not practical. Cost reductions, large renewable energy build-out, and supportive policies are key to scaling production and delivering meaningful emissions reductions across the aviation sector.