MOL's Ammonia FSRU: Pioneering Safe Decarbonization

Mitsui O.S.K. Lines (MOL) receives an Approval in Principle (AiP) from ClassNK for an Ammonia Floating Storage and Regasification
MOLImage Source: MOL


Mitsui O.S.K. Lines (MOL) receives an Approval in Principle (AiP) from ClassNK for an Ammonia Floating Storage and Regasification Unit (FSRU) design. The collaboration with Mitsubishi Shipbuilding aims to safely handle ammonia at sea for widespread distribution. MOL's innovative FSRU design seeks to foster ammonia's role as a carbon-neutral fuel, aligning with its sustainability goals.



Mitsui O.S.K. Lines (MOL) secures a groundbreaking milestone—an Approval in Principle (AiP) from Nippon Kaiji Kyokai (ClassNK) for its innovative design of a Floating Storage and Regasification Unit (FSRU) dedicated to ammonia. Developed in partnership with Mitsubishi Shipbuilding, this design marks a significant step in handling and distributing ammonia at sea, envisioning it as a major player in the quest for carbon-neutral fuel.

The AiP granted to MOL validates the robustness of its ammonia FSRU design, enabling the storage and distribution of large quantities of marine-based ammonia. With this, MOL envisions bolstering the entire ammonia value chain, driving its utilization as a viable alternative fuel with a reduced carbon footprint. FSRUs, designed for liquefied gases, incorporate storage tanks and a regasification facility, efficiently receiving and converting liquefied gas at sea for onshore use. Notably, FSRUs boast lower costs and shorter construction periods than their onshore equivalents. Leveraging its extensive experience in operating FSRUs for liquefied natural gas (LNG), MOL steps confidently into the ammonia sphere.

Ahead of the AiP acquisition, MOL, in collaboration with ClassNK and Mitsubishi Shipbuilding, conducted a comprehensive hazard identification study (HAZID). This study meticulously identified potential hazards and associated risks inherent in the ammonia FSRU design. An antecedent gas dispersion study facilitated a more quantitative evaluation of risks during the HAZID process. This detailed assessment aided in pinpointing specific preventive measures and countermeasures against potential ammonia leaks, ensuring a safer design framework.

The introduction of the ammonia FSRU aligns harmoniously with MOL's strategic sustainability goals. The company has set ambitious targets, aiming to achieve net-zero greenhouse gas emissions by 2050. This milestone aligns with their environmental vision, marking a pivotal step toward a greener future. Additionally, as part of its overarching management plan, "BLUE ACTION 2035," MOL is diversifying its business portfolio, focusing on market-oriented ventures anticipated to yield substantial returns, positioning the FSRU project as a strategic initiative.

MOL reaffirms its commitment to innovation and societal needs by expanding beyond traditional shipping businesses. This venture aims to meet evolving social demands, particularly in environmental conservation, leveraging innovative technologies and services to augment various social infrastructure businesses.


Mitsui O.S.K. Lines' attainment of an Approval in Principle for its Ammonia Floating Storage and Regasification Unit symbolizes a significant stride toward sustainable maritime operations. With a focus on safety, risk mitigation, and aligning with its sustainability objectives, MOL's foray into ammonia FSRUs marks a pivotal moment in maritime technology, reinforcing its commitment to environmental stewardship and innovative solutions.

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