Prometheus enables 100% 24/7 renewable power, storing electricity surpluses as liquid fuels and dispatching the energy when needed, for 1500+ hours at a capital cost of less than $5/kWh
With the ability to store thousands of GWH of energy and generate power at any rating conventional generators can achieve, a unique new capability is introduced for the first time – data centers and grids that can operate using 100% renewables. No more “fossil fuel backup” required.
Prometheus fuels generate power using conventional generators, with high reliability, peaking and baseload capability. When grid connected, our systems offer spinning reserves and inertia that high reliability requires.
Because we purpose-built our tech stack for intermittent operation, we don’t need a grid. Our energy storage systems can quickly switch from charging to discharging to match dynamic renewable availability and provide high reliability power, on or off-grid. Our low capital costs mean that our systems can store energy at the low capacity factors typical of off-grid solar.
A new way to store and use energy
Prometheus absorbs CO2 from the atmosphere and stores it as carbonate (CO3). Using its proprietary technology, carbonate and electricity are transformed into hydrocarbon fuels.
When electricity is abundant, Prometheus can store thousands of hours of energy from intermittent renewable sources, making that energy available again for firm, dispatchable power when needed.
When the fuels are used to generate power, the carbon and water from these fuels is recaptured and stored again as carbonate salts in water. This capture can be done at any time, with the carbonate turned into fuel later when energy is abundant again. Near zero emissions.
The electricity stored in the chemical bonds in the fuel is dispatched, returning the hydrocarbon to water and carbonate again. The principle is similar to batteries that store and release electricity from lithium or iron by changing their oxidation state. We do the same, but with carbon.
Prometheus stores electricity as low cost clean diesel and methanol through direct air capture and advanced electrochemistry.
Our Ultra Long Duration Energy Storage (ULDES) systems can shape and firm renewable energy seasonally, by storing it as liquid fuels when renewables are abundant, for months at a time, and using them when needed to provide firm, dispatchable power.
Utilizing low cost off-grid solar energy, we can create carbon neutral fuels at prices competitive with commodity fossil fuel prices. This enables energy security, by ensuring the availability of fuels to power aviation, shipping, and anything else the economy needs.
Using power from a portable SMR, we can create diesel and jet fuel in a containerized system that can be transported by cargo aircraft. This enables the distributed creation of critical fuels in temporary or remote locations
One technology platform, no infrastructure prerequisites.
Seasonal shaping and firming of renewables makes grids resilient. Our systems offer spinning reserves and inertia that high reliability requires, using conventional generators for peaking and baseload capability.
Our ULDES and Fuel Forge systems are designed to operate with intermittent renewable energy and grid power is not required. They simply run when the sun shines and wind blows storing energy as liquid fuels, and they sit idle when power isn't available. This allows for remote electrification for any purpose.
Prometheus has developed a proprietary electrochemical process that converts carbonate salts in water and electricity into energy dense liquid hydrocarbon fuels. This allows for the capture of CO2 from the air or from power generation exhaust into water as carbonate, which can be stored indefinitely. Once renewable energy is available, the carbonate can then be converted into fuel. This asynchronous carbon capture and fuel production is key to using this technology for zero emission energy storage. It also means that capturing CO2 from the air has a very low cost – no energy is needed to desorb it back to gas, because the carbonate is the form of carbon that is used in the electrochemical process.
The conversion of carbonate into kerosene (diesel and jet fuel) in water at room temperature and atmospheric pressure is a revolutionary breakthrough in electrochemistry.
Previously, using electricity to make fuels required the use of the Fischer Tropsch process, which converts CO2 and hydrogen at high pressure and temperature into hydrocarbons. This previous technology has very high capital and operating costs, and so cannot make commodity market priced fuels. Because it must use CO2 gas, it also could not be used for energy storage as the Prometheus process can. The Prometheus carbonate to kerosene process does not use hydrogen (H2), and does not use high temperature or pressure, a key reason the costs of the technology are so low. It enables an energy storage system capable of storing thousands of hours of energy — enough to absorb surplus renewables and dispatch firm electricity for weeks or months at a time — at under $5/kWh in capital cost, a fraction of the cost of competing long-duration technologies
