Project Neptun involves the establishment of a large-scale facility for the production of green hydrogen and green ammonia in Tromsø, Norway. Tromsø is a major Norwegian port and marine hub. We see the Neptun project as a significant effort towards the green shift.

The carbon-free ammonia is produced by capturing nitrogen from the air and combining it with green hydrogen. The energy used in the hydrogen (H2) and ammonia (NH3) production processes is supplied from regional hydro and wind power plants providing reliable renewable and clean energy.


Neptun plans production start in 2025, with an annual ammonia production volume of 50,000 to 70,000 tonnes in the first project phase with potential ramp-up.

The project was in September 2021 awarded a grant by Enova, a Norwegian authority owned by the Ministry of Climate and Environment, for conducting feasibility studies on green ammonia. The project is a collaboration between three partners, with diverse backgrounds, which bring industry competencies, a strong local presence, and financial strength. We are 100% committed to investing in large-scale production of green ammonia. Our consortium will not only lead to a considerable decrease in greenhouse gases emissions, but also contribute to transforming the city of Tromsø into a recognized green energy hub.




Green ammonia is produced using renewable/green energy sources to extract hydrogen from water, and nitrogen from air. This makes it a more viable solution for long term production.


Blue ammonia is produced from natural gas, but uses renewable energy sources or carbon capture to reduce emissions. Because natural gas is used in the production process, this is not a sustainable way of manufacturing ammonia.


Grey ammonia is the least climate friendly alternative. The production process produces large quantities of carbon dioxide and it’s mainly produced from natural gas.




50,000 - 70,000 TON P.A



Developing the green fuel of the future. As all nations across the world are working towards achieving net-zero carbon emissions by 2050, hydrogen has emerged as a leading carrier of clean energy. Hydrogen is expected to supply approximately 20% of the worlds energy demand by 2050, compared to less than 1% as of today. Ammonia produced from green hydrogen has become the leading carbon free fuel candidate for the shipping industry.

As maritime transport is responsible for almost 3% of global greenhouse gas emissions, fossil fuelled ships will soon face limited ability to operate due to climate change targets. The maritime sector accounts for 34% of climate gas
emissions in Tromsø and with 8,500 annual ship calls at the port of Tromsø, our green ammonia will be an element to the maritime transportation sector’s green shift.

Our ammonia is 100% green, as it is fully produced from local renewable energy sources. Contrary to grey ammonia, green ammonia production derives from the process of water electrolysis, which is supplied from regional hydro and wind power plants providing reliable clean energy. Green ammonia is produced by capturing nitrogen, which makes up to 78% of the air we breathe and combining it with green hydrogen.

Neptun plans a production start in 2025, with an annual ammonia production volume of 50,000 to 70,000 tonnes in the first project phase with potential ramp-up. The purity of our green ammonia obtained through the Neptun project will be of the highest quality, from met graded ammonia at 99.995% purity to R-graded ammonia at 99.98% purity.

Compared to hydrogen, ammonia benefits from more favourable transport and storage costs, higher energy density and safety, and can be utilized with existing infrastructure. Ammonia has nine times the energy density of Li-ion batteries, and three times that of compressed hydrogen.



Tromsø, an excellent location for the production of green maritime fuels. Apart from being surrounded by untouched nature wonders and unspoiled wilderness, Tromsø is the ideal location for the establishment of the green energy hub. Tromsø is one of Norway’s largest ports and hubs for the transport of goods and people, including fisheries, frozen fish export, and tourism. In the coming years, the Northeast Passage is expected to play a large role in maritime traffic.

The city benefits from a strong power surplus and high green energy from wind and hydropower and is Northern Norway’s main transport hub with 8,500 annual ship calls. Moreover, the port of Tromsø is Norway’s largest fishing port, with an increasing number of cruise ship calls

Only 15km away from the city centre, Grøtsund is located along the main shipping lane into the port of Tromsø. It is a natural location for the bunkering of green fuels. The quay of Grøtsund offers optimal large deep-sea quay, ro-ro ramps and existing logistic facilities. From Grøtsund, the green ammonia can be shipped easily to further locations in Norway and Europe or loaded on bunkering ships. The location is suitable as well for the export of green ammonia to the chemical industry across Norway and the European continent. Moreover, a green ammonia storage capacity at the production facility is foreseen.


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