Maritime ammonia: fuel delivery, emissions mitigation systems near readiness
By on September 19, 2023
Mitsubishi Shipbuilding: MAmmoSS®
Final testing has begun in Nagasaki before the market launch of the Mitsubishi Ammonia Supply and Safety System (MAmmoSS®). The on-board fuel handling system includes includes several subsystems: an ammonia gas abatement system (AGAS) to safely treat surplus ammonia fuel, a high-pressure/low-pressure ammonia fuel supply system (AFSS) and an ammonia fuel tank system, which can each be modularised. Testing in Nagasaki will focus on the AGAS subsystem, demonstrating how surplus ammonia fuel can be safely treated (and emissions minimised) over a wide range of vessel operating scenarios.
C-LNG Solutions: fuel supply system awarded AiP
Singapore-based C-LNG Solutions has been awarded Approval in Principle by Bureau Veritas for its new Ammonia LFSS (low flash point fuel supply system). The system has been developed in cooperation with WinGD, based on the latter’s X62DF-A-1.0, dual-fuel engine. WinGD’s X-DF engine series is due to be commercially available in 2025, and the Swiss-based engine maker has recently released detailed technical documentation for the new engines, including concept guides and installation guidelines for vessel owners.
AiP for new NOx emission mitigation system
The American Bureau of Shipping has awarded AiP to Korea Shipbuilding & Offshore Engineering and Hyundai Heavy Industries for their new ammonia reductant supply system for selective catalytic reduction (SCR) in ammonia-fueled ships. The system utilises onboard ammonia as the SCR reductant to remove NOx emissions from the engine exhaust, as opposed to the urea used in traditional diesel propulsion. As the system is designed, the ammonia source can include boil-off gas and purge gas generated from the fuel supply system – both would otherwise require treatment to minimise potential ammonia emissions.
ABS has always been a safety pioneer, so we are well placed to tackle the challenges on board and ashore presented by ammonia’s toxicity and flammability. ABS is committed to leading the industry in supporting ammonia’s safe adoption at sea.
John McDonald, ABS President and COO in his organisation’s official press release, 7 Sept 2023