All subjects
Synthetic Fuels

United invests in Dimensional Energy

United invests in Dimensional Energy
United Airlines Inc (United) and United Airlines Ventures (UAV) invest in and sign a commercial agreement with synthetic sustainable aviation fuel (SAF) start-up Dimensional Energy (photo courtesy Dimensional Energy).

In the United States (US), airline major United Airlines Inc (United) and United Airlines Ventures (UAV) have announced an investment in and commercial agreement with sustainable aviation fuel (SAF) developer Dimensional Energy, as another step to reach United's 100 percent green net zero commitment by 2050, without the use of traditional carbon offsets.

An error occurred

You are logged in as subsbriber at Bioenergy International, but something is wrong.

On your profile you can see what subscriptions you have access to and more information.

Is some of the information wrong – please contact our customer service.

Please reload the page

We could not ascertain if you are logged in or not. Please reload this page.
Bioenergy International premium

Do you want to read the whole article?

Only logged in payed subscribers can read all contents on
As an subscriber you get:
  • Six editions per year
  • Full access to all digital content
  • The E-magazine Bioenergy international
  • And more ...

Dimensional Energy’s novel removes the need for fossil fuels, converting carbon dioxide (CO2) and water into usable ingredients for the Fischer-Tropsch (FT) process – a nearly 100-year-old proven technology used to produce fuels from coal or methane.

While facilities around the world continue to use FT to produce fossil- and renewable fuels, Dimensional will be one of the first to use it with concentrated solar to produce sustainable aviation fuels (SAF).

Under the commercial agreement, United has agreed to purchase at least 300 million (US) gallons (≈ 1.1 billion litres) of SAF over 20 years from Dimensional Energy.

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, said Michael Leskinen, President of UAV.

This agreement further cements United’s status as an airline industry leader in sustainability.

United’s SAF agreements represent the largest volume of SAF of any airline over the next 20 years, based on publicly announced agreements.

Fourth UAV investment

The announcement marks UAV’s fourth SAF-related technology investment, but it is the first pathway of power-to-liquids (PtL), which creates SAF synthetically without the constraints of feedstock growth that are prevalent in other biofuel pathways.

Launched in 2021, UAV targets startups, upcoming technologies, and sustainability concepts that will complement United’s goal of net-zero emissions by 2050 – without relying on traditional carbon offsets.

Over the last decade, United has built a first-of-its-kind sustainability-focused ventures fund. UAV’s portfolio now includes SAF producers and other technologies including carbon capture, hydrogen-electric engines, electric regional aircraft, and urban air mobility.

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


Dimensional Energy was founded in Ithaca, New York (NY), in 2016 and 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, and in September 2021, global climate technology nonprofit investor Elemental Excelerator funded Dimensional as part of its 10th cohort, which led to the company’s introduction to United.

Dimensional has also received grants from the National Science Foundation and both the Department of Energy’s ARPA-e and Solar Energy Technology Office (SETO).

The company began construction on a carbon dioxide to fuels demo in Tucson, Arizona (AZ) in 2021.

I am continually impressed by the team at Dimensional Energy as we scale our advanced carbon dioxide to fuel technology. On top of delivering clear environmental impact, our business model includes delivering durable benefits to local communities through creative partnerships, said Jason Salfi, Co-founder and CEO at Dimensional Energy.

Commissioning of the facility has already begun, and it is set to begin operation this July.

We envision a world run on conflict-free energy. United’s support of sustainable aviation fuel made from captured emissions is an important step in the aviation industry’s pursuit of carbon neutrality, Jason Salfi said.

Dimensional’s technology can run on all forms of renewable energy. At the Tucson site, they are using electricity from the Arizona grid, which gets an increasing amount of power from local solar panels.

Future plants are slated to use hydro-power, wind power and rapidly maturing concentrated solar, which utilizes heat from direct sunlight.

Dimensional can also utilize CO2 from a variety of sources, be it straight from industrial sites (like cement plants), from Direct Air Capture (DAC), and from biological processes like fermentation and biomass gasification.

Most read on Bioenergy International

Get the latest news about Bioenergy

Subscribe for free to our newsletter
Sending request
I accept that Bioenergy International stores and handles my information.
Read more about our integritypolicy here