Japan’s Mitsui E&S has finished commercialising its ammonia dual-fuel engines and associated fuel supply systems, according to Ship & Bunker. The company announced that these systems are now ready to be supplied for installation on actual vessels.
According to Ship & Bunker, Mitsui E&S completed integrated land-based testing of its Mitsui-Everllence ammonia dual-fuel engine and fuel system in February 2026. The tests were witnessed by classification society ClassNK, which verified the performance of both the engine and the fuel supply system.
Testing and Certification Details
Ship & Bunker reports that the testing process was carried out in accordance with classification society rules. In addition, NOx certification for the engine confirmed compliance with International Maritime Organization (IMO) requirements, according to the outlet.
With these milestones completed, Mitsui E&S said it is now in a position to supply the ammonia dual-fuel engines and fuel systems for use on actual ships, as reported by Ship & Bunker.
Expansion Plans
According to Ship & Bunker, Mitsui E&S is also expanding its fuel supply system testing facilities. This expansion is designed to support engines licensed under both Everllence and WinGD. The company further stated that it plans to establish a mass-production system as demand for ammonia-fuelled vessels increases, Ship & Bunker reports.
Does This Matter to You?
This development is relevant to those tracking the progress of alternative marine fuels and the technology needed to support them. The completion of commercial-stage testing for ammonia dual-fuel engines marks a step in the availability of propulsion systems designed for vessels seeking to reduce emissions through ammonia as a fuel source.
As reported by Ship & Bunker, the confirmation of IMO NOx compliance and classification society verification are procedural steps that typically precede wider adoption of new engine technologies in commercial shipping. The company’s stated plans to scale up production capacity also signal anticipated growth in demand for ammonia-fuelled vessels, according to the source material.
The direct operational or commercial impact on bunkering and fuel supply chains is not detailed in the source material and remains unclear at this stage.
Gulf Bunkering does not provide operational or security guidance. This article is for informational purposes only. Operators should consult flag state authorities, P&I clubs, and relevant advisories for decisions relating to transit planning.
Sources: Ship & Bunker
