Technology Partner Topsoe
First Ammonia and Partners visit the Topsoe Factory in Denmark, October 2024
Partnered on the Next-Generation Electric Ammonia Plant
First Ammonia is partnered with Topsoe on the future of electric ammonia through a 5 GW electrolyzer capacity reservation agreement.
Using Topsoe’s solid oxide electrolyzer cells (SOEC) integrated with an ammonia loop maximizes the amount of ammonia produced per watt of electricity.
Thanks in part to the First Ammonia-Topsoe partnership, Topsoe constructed a 500 MW per year SOEC factory in Herning, Denmark. Manufacturing began in 2024.


Topsoe’s History of Excellence
Topsoe is a Danish company with a strong reputation for excellence in engineering since its founding by Dr. Haldor Topsøe in 1940. For more than 80 years, Topsoe has delivered ammonia solutions to projects around the world.
Expertise on solid oxide electrolyzers and ammonia synthesis gives Topsoe a unique advantage in designing high-performance, electric ammonia systems.

Advantages of Topsoe’s Integrated SOEC – Ammonia Technology
- 20-30% more efficient than the next best market alternative; less energy is needed to produce a greater amount of ammonia
- Fluctuates from 10% to 100% to match available renewable electricity; turning down when energy demand is high supports grid stability
- Modular design allows prefabrication offsite, simplifying construction onsite; shortened construction timelines reduce risk
- Flexibility to scale up quickly to meet demand and adapt to new sites with favorable renewable resources
Proven Approaches

Solid Oxide Electrolyzer Core
Topsoe demonstrated the consistent performance of its solid oxide electrolyzer core at its Frederikssund facility. The core has been running under industrial conditions since 2023.
The SEOC core performed well in the fluctuating operational mode required to run on variable solar and wind power generation.

Dynamic Ammonia Loop
Topsoe demonstrated the fluctuating ammonia loop at the electric ammonia plant in Ramme, Denmark. In partnership with Skovgaard Energy and Vestas, the plant showed how an ammonia plant can directly be coupled with fluctuating renewable power.