Mitsubishi Shipbuilding begins testing ammonia ship handling system
Mitsubishi Shipbuilding Co., Ltd. has announced that it is
currently developing the Mitsubishi Ammonia Supply and Safety System (MAmmoSS),
an ammonia handling system.

This technology, according to Mitsubishi, was designed to enable the use of
ammonia as marine fuel, which has gained attention as a way of dramatically
decreasing greenhouse gas (GHG) emissions from ships.
Mitsubishi Shipbuilding has commenced demonstration testing of the Ammonia
Gas Abatement System (AGAS), an MAmmoSS subsystem for properly treating excess
ammonia, as part of this development project.
Mitsubishi Shipbuilding will undertake demonstration testing of the
processing performance under various situations imitating onboard ammonia
operations at the AGAS demonstration facility at the Nagasaki District MHI
Research & Innovation Centre.
Furthermore, Mitsubishi will investigate widening the scope of the maritime
industry through partnership with relevant equipment makers; developed
ammonia-related technology will be used to numerous industries to enable 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.
In June 2023, the Japanese classification society ClassNK gave Mitsubishi
Shipbuilding Co., Ltd. and NYK Approval in Principle (AiP) for a ship capable of
transporting ammonia and liquefied CO2 (LCO2).
A month later, the Port of Newcastle signed a Memorandum of Understanding
(MoU) with the government of Australia and Mitsubishi Heavy Industries (MHI)
setting out a pathway towards a clean energy economy in the Hunter Region.
