Sustainable Aviation Fuel: United Announces Agreement with CO2 Utilisation Company Dimensional Energy

JacobAviation, CC BY-SA 4.0, via Wikimedia Commons

LONDON – Under a newly brokered commercial agreement, United Airlines has agreed to purchase at least 300 million gallons of sustainable aviation fuel SAF over 20 years from Dimensional Energy.

United’s investment represents the largest volume of SAF negotiated by any airline over the next 20 years.

A fusion of old and new technology


The technique which Dimensional Energy employs is perhaps best described as a fusion of old technology – a century old technique of producing fuel from coal – with new technology, in order to solve a modern day problem.

Dimensional Energy’s novel technology removes the need for fossil fuels, converting carbon dioxide and water into usable ingredients for the Fischer-Tropsch process – a nearly 100-year-old proven technology used to produce fuels from coal or methane.

While facilities around the world continue to use Fischer-Tropsch to produce fossil fuels, Dimensional will be one of the first to use it to produce sustainable aviation fuels (SAF).

Decarbonising air travel


Airlines and aviation operators face a significant task in reducing their collective carbon ‘footprint’, in keeping with global initiatives to drastically cut emissions over the coming decade.

Credit: United Airlines

In announcing their partnership agreement with Dimensional Energy, Michael Leskinen, President of United Airlines Ventures, observed:

“Sometimes you have to look to the past to solve new problems, and we recognize that decarbonizing air travel is going to require combining proven technologies, such as Fischer-Tropsch, with the latest advances in science and engineering.”

“As we grow our portfolio of companies like Dimensional, we are creating opportunities to scale these early-stage technologies and achieve United’s commitment carbon neutrality by 2050, without the use of traditional carbon offsets.”

About Dimensional Energy


Founded in New York in 2016, Dimensional Energy has spent the last six years refining its reactors and catalysts in both lab and real-world demonstrations. The company’s early success led to its status as a finalist in the first Carbon Xprize.

Dimensional Energy Co-founder and CEO Jason Salfi, said:

“Dimensional Energy is acutely focused on energy solutions that center communities who have been marginalized in the past century as infrastructure and energy systems were developed.”

“We envision a world run on truly conflict-free energy that can scale to meet the global demand for hydrocarbon fuels and feedstocks. United’s support of sustainable aviation fuel made from captured emissions is an important step in the aviation industry’s pursuit of carbon neutrality.”

United Airlines’ green commitment


United Airlines have a strong track record of proactivity in researching and investing in SAF initiatives and zero-emission engine technology.

Notably, the airline made a landmark achievement in December 2021, when it became the first air carrier to fly a passenger service with one engine run completely on sustainable aviation fuel.

Amidst a long list of achievements are some notable recent events:

  • In May, United became the first U.S. carrier to sign an overseas SAF fuel purchase, with Neste for more than 50 million gallons of SAF to initially fuel United flights out of Amsterdam’s Schiphol Airport.
  • In March, UAV invested in synthetic biology company Cemvita Factory for them to begin R&D efforts to bioengineer microbes with the express purpose of creating SAF.
  • In December 2021, United purchased an equity stake in hydrogen-electric engine developer ZeroAvia, becoming the largest airline to invest in zero-emission engines for regional aircraft.

In July 2021, Air Transport World magazine named United Airlines as its ‘Eco-Airline of the Year’ for the second time.

The recent agreement with Dimensional Energy marks yet another significant step in United’s green journey.

About the author

Len Varley

A former Chief Pilot/Chief Flying Instructor, Len has 35 years experience in diverse aviation roles. Speaks fluent Australian & English! Len is the Assistant Editor for AviationSource.

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