Japan Tests New “Air-to-Fuel” Technology That Could Replace Petrol in Future
ENEOS Corporation has successfully demonstrated a new type of synthetic fuel produced using carbon dioxide captured from the air and hydrogen extracted from water, according to official project updates and industry reports.
The development is being carried out in Japan and is being viewed as a long-term step toward low-carbon fuel alternatives, rather than an immediate replacement for petrol or diesel.
How the Synthetic Fuel Is Made
The process combines multiple advanced technologies:
- Carbon dioxide is captured directly from the atmosphere using Direct Air Capture (DAC) systems
- Hydrogen is produced from water using electricity, often sourced from renewable energy
- Both elements are converted into liquid hydrocarbons through synthetic fuel production methods such as Fischer-Tropsch synthesis
The resulting product is chemically similar to conventional petrol and diesel, meaning it can be used in existing engines and fuel infrastructure without modification. This type of fuel is often referred to as a “drop-in fuel.”
Small-Scale Production and Testing
ENEOS has built a demonstration facility at its Central Technical Research Laboratory in Yokohama, capable of producing around one barrel (approximately 160 litres) of fuel per day.
The fuel has already been tested in limited real-world applications, including transport trials such as a shuttle bus used for Expo-related demonstrations, showing that it can function in practical conditions.
Challenges for Large-Scale Use
Despite successful testing, experts say the technology is still in an early stage. Large-scale production has not yet been achieved due to high costs and energy requirements.
Industry reports suggest that while the system works technically, scaling it up to compete with traditional fuels remains a major challenge.
Global Interest in Clean Fuel Alternatives
Synthetic fuels made from captured CO₂ and renewable hydrogen are being studied worldwide as a potential solution for sectors that are difficult to electrify, such as aviation, shipping, and heavy transport.
For now, ENEOS continues research as part of Japan’s broader strategy to reduce carbon emissions and develop future energy alternatives.
