Prometheus

Prometheus Fuels is a Santa Cruz, CA-based deep-tech company founded in 2019 that has developed a revolutionary approach to producing zero-net-carbon liquid fuels directly from air and sunlight. Their core breakthrough is a fully integrated system combining a patented "no-desorb" direct air capture (DAC) process - which captures atmospheric CO₂ directly into water as carbonate ions at costs below $50/ton, an 80%+ reduction over conventional DAC - with their proprietary Faraday Reactor, the world's first hydrocarbon electrolyzer. This room-temperature, atmospheric-pressure electrochemical process converts those carbonate ions directly into finished liquid fuels including methanol, diesel, jet fuel, and gasoline. The entire system runs on intermittent off-grid solar electricity, eliminating the need for grid infrastructure and enabling production wherever the cheapest renewable energy exists on Earth.

What distinguishes Prometheus from other electrofuel (e-fuel) approaches is the radical simplification of the chemistry. Traditional synthetic fuel pathways rely on energy-intensive Fischer-Tropsch synthesis, methanol-to-jet upgrading, high-pressure hydrogen production, and multi-step thermochemical processes - each adding cost and complexity. Prometheus' single integrated electrochemical pathway bypasses all of these, producing 99.99%-pure methanol (independently verified) and kerosene-range hydrocarbons (C8-C19) that can meet aviation fuel standards. Their Titan Forge Alpha pilot plant at their Santa Cruz HQ has been operating continuously for over four years, producing e-fuels from off-grid solar at a capacity of ~16,000 gallons/year, with a new 200-ton/year modular DAC system scaling production. The company has secured a landmark commercial offtake contract with American Airlines for 10 million gallons of sustainable aviation fuel (SAF), validating commercial demand.

Prometheus sits at a critical intersection of the US energy supply chain: it addresses both the intermittency problem of renewables (via ultra-long-duration energy storage in liquid form) and the decarbonization challenge of hard-to-electrify sectors - aviation, maritime shipping, defense logistics, and heavy transport. By producing drop-in fuels compatible with existing infrastructure, Prometheus avoids the need for costly fleet or engine replacements. The company has also identified a defense application, creating containerized, deployable fuel production systems powered by small modular reactors (SMRs) for forward military operations. Their technology has received recognition at the highest policy levels, with founder Rob McGinnis presenting to G7 Energy Ministers at the IEA's invitation in October 2025 and announcing a new ultra-long-duration energy storage (ULDES) capability at the IEA Ministerial Meeting in Paris in April 2026.