Green Energy

Boeing, Clear Sky collaborate to decarbonize aviation through SAF

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Aviation major Boeing and sustainability firm Clear Sky have announced to have collaborated to accelerate sustainability solutions for aviation. As an initial project, the companies will help in testing and advancing Firefly Green Fuels’ cutting-edge technology to increase sustainable aviation fuel (SAF) production in the UK.

Boeing held that Firefly transforms sewage waste feedstock into SAF through hydrothermal liquefaction (HTL). This process uses heat and high pressure to convert waste into biocrude oil and biochar, a powdery substance that can be used as a fertilizer. SAF produced from this abundant, yet untapped feedstock reduces lifecycle CO₂ emissions by more than 90% compared to traditional petroleum jet fuel, according to independent analysis.

The Clear Sky-led consortium of investors and strategic partners, including Boeing, will invest in Firefly’s new technology, subject to final diligence. Boeing will provide training, direction and facilitation on testing that will accelerate the qualification of this new route to SAF.

“SAF offers the greatest opportunity to decarbonize aviation, and the industry’s collective challenge of bringing it to scale globally requires new sustainable pathways,” said Brian Moran, Boeing’s chief sustainability officer.

Currently SAF represents 0.1% of global jet fuel use. In the UK the pending mandate to achieve 10% SAF in the jet fuel mix by 2030 will require 1.2 million tonnes of SAF by 2030, increasing to 7 million tonnes by 2050. Boeing and Clear Sky’s investment demonstrates progress on the roadmap given the available UK sewage waste can meet a significant proportion of the UK’s SAF requirement.

“In a world where demand for SAF outstrips available supply, Firefly is paving the way to cost-competitive and globally available fuel,” said James Hygate, CEO of Firefly. “With the support of Clear Sky and Boeing, we are propelling toward our goal of commercial production in the UK by 2029, and rapid replication across the globe.”

In addition to supporting Firefly, Boeing and Clear Sky are embarking on an international investment partnership focused on sustainability solutions that span aviation and adjacent industries such as chemicals and materials. Areas of focus include SAF, alternative propulsion, carbon removal and advanced materials and recycling.

“Boeing is undoubtedly a leader in advancing aviation’s decarbonization journey,” said Krishnan Narayanan, Founding Partner at Clear Sky. “We are delighted to be collaborating with Boeing to scale Firefly with more projects to be announced in the future.”

Subhash Yadav

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