Interview with Dan Sutton, CEO of Syntholene Energy

Recording date: 14th April 2026

Syntholene Energy is pioneering a cost-competitive sustainable aviation fuel (SAF) by integrating geothermal waste heat into its production process. This strategy aims to drastically reduce the cost of synthetic fuels, targeting price parity with fossil fuels within the next five years.

Syntholene reduces the electricity required for hydrogen production—which typically accounts for 70% of synthetic fuel costs—by utilizing high-temperature geothermal or nuclear waste heat. By co-locating with stranded energy assets, the company projects its first 20,000-ton commercial facility can produce fuel at $1.24 per liter, significantly narrowing the gap with the $0.80 to $0.90 fossil fuel average. The resulting product is a "drop-in" replacement fuel that seamlessly utilizes existing petroleum infrastructure without requiring airlines to upgrade their fleets.

The company is currently constructing a 250-kilowatt demonstration facility at a preserved geothermal power station in Húsavík, Iceland. Scheduled for operation in 2026, the site leverages Iceland's massive, unexportable geothermal resources to validate the lab-scale successes previously achieved at the Idaho National Lab in 2022. Following a brief commissioning period, a major petroleum engineering firm will conduct a third-party techno-economic validation in early 2027 to unlock project financing and strategic partnerships.

Recently listed on public exchanges and backed by multi-billion-dollar family offices, Syntholene is strategically targeting mandated SAF markets across the EU, the UK, and Asia. The company relies on a modular scaling strategy and patented supply chain integrations to protect its cost advantages as it shifts from demonstration to commercial scale. If successful, this thermal integration model could eventually provide low-cost synthetic fuels for marine shipping, long-haul trucking, and the broader liquid fuel market.