Challenge Towards Sustainable Maritime Logistics:
Development Project for Ammonia dual-fuel engines

In the international shipping sector, reducing GHG (Greenhouse Gas) emissions from ships has become an urgent issue, and the practical application of engines using ammonia - a fuel that produces zero CO2 emissions - is expected to be a major step toward realizing a decarbonized society.
MITSUI E&S has established "Realization of a Decarbonized Society" as one of its materiality themes.
MITSUI E&S has completed the commercialization of large ammonia-fueled marine engines (Ammonia dual-fuel engines) and ammonia fuel supply systems (AFSS). As the only company in Japan manufacturing both Ammonia dual-fuel engines and AFSS, we have thus established a supply framework for marine propulsion systems aimed at the practical implementation of ammonia-fueled vessels, taking a significant step toward the decarbonization of the shipping industry.

Track Record of Developing and Launching Marine Engines Compatible with New Fuels Ahead of Competitors

Since developing the world's first LNG dual-fuel engine in 1994, MITSUI E&S has been developing dual-fuel engines compatible with various new fuels. We have established technology and supply systems that can respond to diverse needs, including LNG, ethane, LPG, and methanol. As of June 2026, the cumulative number of orders received is 139 units, and we have built a track record as a leading company in environmentally friendly engines.

Development History of Dual-Fuel Engines

Cumulative Orders for Dual-Fuel Engines

 (As of June 2026)

Commercialization of Ammonia dual-fuel engines

Ammonia and hydrogen, which do not emit CO2 during combustion, have recently attracted global attention as next-generation fuels. The practical application of engines using ammonia is a significant step towards achieving a decarbonized society. 
In February 2026, MITSUI E&S conducted land-based tests involving the integrated operation of the Ammonia dual-fuel engine "MITSUI-Everllence B&W 7S60ME-C10.5-LGIA-HPSCR" and the AFSS, witnessed by ClassNK (Nippon Kaiji Kyokai), and verified their performance. Following the completion of the tests and the subsequent review, we confirmed the completion of onshore testing in accordance with classification society rules and verified compliance with International Maritime Organization (IMO) NOx regulations through NOx certification. Consequently, we have finalized the commercialization of the Ammonia dual-fuel engines and the AFSS and are now able to supply it for actual vessels.

Ammonia dual-fuel engine 7S60ME-C10.5-LGIA-HPSCR External View

Toward Becoming a Total Supplier Handling Ammonia Supply Equipment and Fuel Tanks

The realization of ammonia vessels equipped with Ammonia dual-fuel engines requires not only engines, but also new fuel supply systems to supply ammonia to those engines and other new peripheral equipment. MITSUI E&S is also advancing the development of peripheral equipment together with our group company TGE Marine Gas Engineering GmbH (TGE).
As the only company in Japan manufacturing both Ammonia dual-fuel engines and AFSS, MITSUI E&S supports the practical implementation of ammonia-fueled vessels by providing an integrated marine propulsion system solution.
By providing engines and peripheral equipment plus safety and security through remote monitoring systems, we are working toward the realization of a decarbonized society as a total supplier of marine propulsion systems capable of supplying complete vessel propulsion system packages.

Role of MITSUI E&S

Fuel tanks, and fuel supply equipment