Green Fuels Technology Landscape: Methanol, Methane, Ammonia and SAF

Power-to-X Driving the Future of Low-Carbon Energy Systems

As the global energy system transitions toward decarbonization, the future energy structure is shifting from pure electrification to a hybrid system combining electricity and molecular fuels.

While renewable energy such as solar and wind continues to expand, several sectors remain difficult to electrify:

• Aviation

• Shipping

• Heavy industry

• Chemical production

• Long-duration energy storage

These sectors require high energy density fuels and established logistics systems, driving the rise of Power-to-X (PtX) pathways.

Core Technology Pathway of Green Fuels

Green fuels convert renewable electricity into storable and transportable chemical energy through:

• Renewable energy (solar, wind)

• Water electrolysis hydrogen production (ALK, PEM, AEM)

• Carbon capture (DAC / CCUS)

• Fuel synthesis systems

These systems are typically integrated as modular skid-mounted solutions, enabling scalable deployment.

e-Methanol: A Practical Pathway for Shipping Decarbonization

e-Methanol is one of the most mature green fuels.

Reaction:

CO₂ + 3H₂ → CH₃OH + H₂O

Advantages:

• Established industrial process

• Liquid fuel with low transport cost

• High compatibility with existing shipping infrastructure

  

e-Methane: Extending the Natural Gas System

e-Methane is produced via the Sabatier reaction:

CO₂ + 4H₂ → CH₄ + 2H₂O

Key benefits:

• Direct integration into natural gas networks

• Long-duration energy storage (Power-to-Gas)

• Fossil gas replacement

  
  

e-Ammonia: A Carbon-Free Fuel Option

e-Ammonia is produced through the Haber-Bosch process:

N₂ + 3H₂ → 2NH₃

Advantages:

• Zero CO₂ emissions during combustion

• High energy density

• Mature global logistics infrastructure

  
  

SAF: Decarbonizing Aviation

Sustainable Aviation Fuel (SAF) is the key pathway for aviation decarbonization.

Main routes include:

• Power-to-Liquid

• HEFA

• Fischer-Tropsch synthesis

  
  

Conclusion

The future energy system will not rely solely on electricity, but on a combination of:

👉 Electricity + Green Fuels

Green fuels will play a critical role in:

• Aviation and shipping

• Long-duration energy storage

• Carbon utilization

Green fuels are no longer conceptual—they are becoming industrial reality.