Alongside our continual drive towards ever greater engine efficiency using smarter technologies, the transition to cleaner fuels is key to achieving a net zero future for civil aviation. To help reduce aviation’s dependence on fossil-based fuels, Pratt & Whitney is advancing the use of Sustainable Aviation Fuels (SAF), while also developing novel technologies to support alternative, zero carbon fuels, like hydrogen.

Ready for Sustainable Aviation Fuels (SAF)

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All Pratt & Whitney engines are ready to operate with SAF at blends of up to 50% with Standard Jet A Kerosene. We have been actively involved in SAF testing and certification for decades and helped regulators define the technical standards that enable multiple different SAF blends to be used today.

Pratt & Whitney continues to collaborate with industry partners to enable the use of 100% in future, and is working to ensure that next generation engines like the GTF Advantage™ are compatible with that 100% standard.

Why SAF?

Hydrogen Power for Zero Emissions Flight

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Rich in energy, readily combustible, and free from carbon atoms, hydrogen has the potential to enable zero-emissions flight – but it also comes with significant challenges. With extensive expertise of hydrogen- fueled propulsion systems dating back to the 1950s, Pratt & Whitney understands these challenges and opportunities well.

Innovating Hydrogen-Fueled Propulsion Technology

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Optimizing engine design to take full advantage of unique cryogenic properties of hydrogen will be key – that’s the essence of the Pratt & Whitney's Hydrogen Steam Injected, Inter‐Cooled Turbine Engine (HySIITE) project.

HySIITE will use liquid hydrogen combustion and water vapor recovery to achieve zero in-flight CO2 emissions, while reducing nitrogen-oxide (NOx) emissions by up to 80 percent and reducing fuel consumption by up to 35 percent for next generation single-aisle aircraft.

More about HySIITE

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