Mitsubishi Shipbuilding, a part of Mitsubishi Heavy Industries (MHI) Group, is currently developing the Mitsubishi Ammonia Supply and Safety System (MAmmoSS), an ammonia handling system to support the utilisation of ammonia as marine fuel, which is attracting attention as a means of significantly reducing GHG emissions from ships.
As part of this development project, Mitsubishi Shipbuilding has begun demonstration testing of the Ammonia Gas Abatement System (AGAS), a subsystem of MAmmoSS to safely treat surplus ammonia.
Using the AGAS demonstration facility at the Nagasaki District MHI Research and Innovation Centre, Mitsubishi Shipbuilding will conduct demonstration tests of the processing performance under various scenarios simulating onboard ammonia operations as well as explore broadening the scope of maritime fuel options through collaboration with related equipment manufacturers. Ammonia related technology developed by MHI will be applied for various industries to support its safe handling.
MammoSS comprises several subsystems in addition to AGAS, including a high-pressure/low-pressure ammonia fuel supply system (AFSS) and an ammonia fuel tank system. A key feature of MAmmoSS is that each of these subsystems can be modularised, allowing Mitsubishi Shipbuilding to provide the optimal modular configuration in a package for onboard plants consisting of multiple engines and boilers.
Mitsubishi Shipbuilding, aligning with MHI Group’s strategy for advancement of the energy transition, will bring together its technologies and expertise in ammonia handling accumulated through its history of building transport carriers, and as a shipboard ammonia handling systems manufacturer, supply products with an emphasis on safety and reliability. Further, as maritime system integrator, Mitsubishi Shipbuilding will contribute to the further development of marine logistics and the reduction of its environmental impact on a global scale by providing shipbuilding engineering services for ammonia-fuelled vessels, along with construction support and other services to meet customer needs.



