First green ammonia plant in US Midwest to use Stamicarbon's tech
Maire Tecnimont Group has signed an agreement with Greenfield Nitrogen LLC to develop the first 240 mtpd green ammonia plant in the US Midwest. Stamicarbon will provide its NX Stami™ Green Ammonia technology, working on this project alongside other subsidiaries of the Group, NextChem and MET Development. This is already the second NX Stami™ Green Ammonia plant under development since the technology entered the market in May 2021.

The new green ammonia plant to be located in Iowa will be powered by wind and solar energy and will be the first of Greenfield Nitrogen’s green ammonia facilities to be developed in the US Corn Belt, the region in the Midwest widely known for its corn production. The project will contribute to lowering CO2 emissions by the industry and reducing dependency on ammonia imports in the region.
For more information about the project, read Maire Tecnimont’s press release.
About NX Stami™ Green Ammonia
NX Stami™ Green Ammonia technology offers a sustainable and highly competitive alternative to conventional ammonia production, paving the way for producing green fertilizers from renewable energy sources.
Read more about our green ammonia technology.