E-fuels pioneer Prometheus has announced a breakthrough in its Direct Air Capture (DAC) technology, which utilizes solar power to convert carbon dioxide (CO₂) into usable fuel, reducing the overall production cost by 80% compared to industry averages.
The company explained that this achievement transforms e-fuels from a high-cost alternative to a commercially viable, competitive, more sustainable energy solution that can manufacture several different categories of usable fuel in a wide range of locations.
“The most critical point about this technology is that it has reduced the cost of Direct Air Capture (DAC) of CO₂ and the cost of our carbon-neutral e-fuels to price parity with fossil fuels for the first time,” company founder and CEO Rob McGinnis told The Debrief.
According to a statement from Prometheus, most DAC systems cost between $200 and $600 per ton of CO₂ captured. Much of that cost is due to the numerous steps traditional systems must undergo before producing usable fuel. Conversely, the company noted that its “streamlined” approach eliminates the traditional steps of gas purification, compression, absorption, and desorption, along with much of the costly infrastructure, thereby reducing capital and energy requirements compared to competitive systems.
“We capture CO₂ from the air into water that has a high pH in a cooling tower-inspired structure,” McGinnis told The Debrief. “The CO₂ becomes carbonate in water, which we turn directly into fuel using electrochemistry in our hydrocarbon electrolyzer.”
The company’s CEO stated that the system is also uniquely designed to produce various carbon-based outputs. So, depending on the client’s needs, Prometheus’ DAC can produce e-fuel options ranging from methanol to heavy diesel.
“We are able to choose which fuel we wish to produce,” he explained.
The company also emphasized that the system is more versatile and geographically flexible compared to existing options. For example, the system eliminates the smokestacks and other infrastructure components used by existing DAC systems and replaces them with a “modular, off-grid system” that possesses “full geographic and economic flexibility.”
“By decoupling fuel production from traditional carbon sources, Prometheus can site its systems wherever renewable electricity is cheapest, and inexpensively transport liquid fuels anywhere in the world,” they explained. The company also notes that their system “unlocks carbon neutral fuels at fossil fuel prices,” without government subsidies, biogenic carbon, or other point-source emissions.
“This isn’t just a scientific breakthrough, it’s a whole new business model,” McGinnis said. “When you combine ultra-low-cost DAC with modular, off-grid electrochemical fuel production, you open up access to remote, off-grid solar – the cheapest source of energy on the planet – making it available anywhere in the world as a new low-cost source of 24/7, firm, dispatchable, carbon-neutral power.”
Prometheus’ current DAC prototype has already been running for more than four years and is actively producing e-fuels at the company’s Titan Forge Alpha pilot plant. McGinnis told The Debrief that the system is rated at 16,000 gallons per year of e-methanol. The company has also begun construction on a new, modular 200-ton system, which is expected to be completed later this year.
In the future, McGinnis said a pair of larger commercial projects that will produce fuels “at the million-ton scale” are already in the planning and site selection phase. The CEO also told The Debrief that they have “sold out” the 11 million tons of e-fuels expected to be produced by the two facilities during their first decade of operation.
“We’ve already pre-sold 10 years of commercial production to customers in aviation, maritime, and polymers from our 100,000-ton-per-year plant and our million-ton-per-year plant,” he explained.
When asked how e-fuels compare to other sustainable options, such as biofuels, McGinnis told The Debrief that his technology, which simultaneously removes harmful CO₂ and produces fuel, is ideally suited for a broad range of uses and applications. Conversely, the company founder said that “biofuels use crops, which are best used for food.”
“By developing a new low-cost DAC technology, along with our hydrocarbon electrolysis Faraday Reactor, we’ve brought carbon capture below $50 a ton and made truly affordable e-fuels possible for the first time,” he concluded.
Christopher Plain is a Science Fiction and Fantasy novelist and Head Science Writer at The Debrief. Follow and connect with him on X, learn about his books at plainfiction.com, or email him directly at christopher@thedebrief.org.