Japan Develops Synthetic Fuel From Water and Air as Oil Alternative
- ENEOS Corporation has successfully produced synthetic fuel, referred to as e-fuel, utilizing atmospheric carbon dioxide, water, and renewable electricity at its demonstration facility in Yokohama, Japan.
- The production took place at the Central Technical Research Laboratory in Yokohama, which houses Japan's first integrated synthetic fuel demonstration plant.
- Current production capacity at the Yokohama plant is approximately one barrel per day, which is equivalent to about 159 liters.
ENEOS Corporation has successfully produced synthetic fuel, referred to as e-fuel, utilizing atmospheric carbon dioxide, water, and renewable electricity at its demonstration facility in Yokohama, Japan. The achievement represents a technical milestone in the creation of carbon-neutral liquid fuels, although the company is currently reassessing its plans for large-scale commercialization citing economic constraints.
The production took place at the Central Technical Research Laboratory in Yokohama, which houses Japan’s first integrated synthetic fuel demonstration plant. The facility was completed in 2024, with operations officially commencing in September 2024.
Current production capacity at the Yokohama plant is approximately one barrel per day, which is equivalent to about 159 liters. While the scale of production is modest, ENEOS designed the facility to validate the core technologies necessary for future industrial deployment, specifically focusing on yield optimization, efficiency improvements, and the requirements for continuous operation.
Technical Production Process
The synthetic fuel is generated through a three-stage integrated chemical process. The first stage involves the supply of feedstocks, where carbon dioxide is captured directly from the atmosphere using a Direct Air Capture (DAC) system provided by Climeworks AG. Simultaneously, hydrogen is produced on-site through water electrolysis powered entirely by green electricity, marking the first application of this specific method for synthetic fuel production in Japan.
In the second stage, the captured carbon dioxide reacts with the hydrogen via a Reverse Water Gas Shift Reaction. This process converts the materials into water and carbon monoxide, resulting in the production of synthesis gas, or syngas.
The final stage utilizes Fischer–Tropsch synthesis and refining to convert the syngas into synthetic crude oil.
Funding and Institutional Support
The development of the Yokohama plant was commissioned by the New Energy and Industrial Technology Development Organization (NEDO) and was funded under Japan’s Green Innovation Fund.
The project was intended to establish a viable pathway for carbon-neutral liquid fuels, which could potentially serve as alternatives to traditional petroleum-based fuels. However, the transition from a demonstration plant to a commercial-scale operation remains challenged by the costs associated with the technology.
As of March 30, 2026, the company indicated that it is re-evaluating the feasibility of broad commercial deployment due to these economic constraints, despite the technical success of the integrated production process.