A new demonstration project in the Port of Rotterdam shows that ship-to-ship ammonia bunkering can be carried out safely within an active port environment. The demonstration is part of the EU-funded MAGPIE project, and the report is now available, providing concrete learnings that industry can use to guide future ammonia bunkering and accelerate global port permitting.

The shipping sector must transition away from fossil fuels to meet climate targets. Ammonia is considered a promising alternative fuel, but its specific hazards pose significant safety, operational, and regulatory challenges. Without competent operators, fit-for-purpose equipment and robust safety and regulatory frameworks, ammonia bunkering cannot take place safely in ports.

Within the MAGPIE project, a full-scale simulation of a ship-to-ship ammonia bunkering operation was conducted in the Port of Rotterdam on 12 April 2025. The demonstration showed that ammonia bunkering within port limits is operationally feasible when carefully planned and executed within a robust safety and regulatory framework.

The learnings from the demonstration have now been consolidated by the Mærsk Mc-Kinney Møller Center for Zero Carbon Shipping and project partners in a comprehensive ammonia bunkering demonstration report. This publication provides the industry with practical lessons and a validated port safety framework and tools that other ports can use as a blueprint for ammonia bunkering.

A key outcome of the project is the validation of the Port of Rotterdam’s port safety framework for ammonia as a fuel, as well as the International Association of Ports and Harbours’ (IAPH) Port Readiness Tool. The results demonstrate that these frameworks are fit-for-purpose instruments for ports considering the introduction of new alternative fuels.

The project delivers practical learnings, validation sheets and recommendations that can be used by ports globally to build confidence in ammonia bunkering and to inform future port permitting and regulatory processes. The results support the EU’s ambition for green ports and the safe deployment of alternative fuels in the maritime sector.
— Bo Cerup-Simonsen, CEO, Mærsk Mc-Kinney Møller Center for Zero Carbon Shipping

The energy transition requires new, integrated value chains. This ammonia bunker pilot is an important step in developing a complete value chain for alternative fuels, from import to application in shipping. Together with our partners, we demonstrate that innovation, safety, and scalability can go hand in hand. Rotterdam plays a connecting role as an energy and logistics hub for Northwest Europe.
— Boudewijn Siemons, CEO, Port of Rotterdam

The learnings from MAGPIE contribute to a broader effort to accelerate sustainable, smart and multimodal port systems and results will be shared with the wider industry to support the global transition of the shipping sector.

Source: Mærsk Mc-Kinney Møller Center for Zero Carbon Shipping