Wärtsilä has upgraded its 4-stroke ammonia-fueled engine, the Wärtsilä 25 Ammonia, boosting power output to 315 kW per cylinder at 900 rpm. This enhancement allows for fewer cylinders, simplifying installation and maintenance. The engine supports both LNG and ammonia, offering shipowners greater flexibility in fuel choices as the industry transitions to cleaner alternatives.
A new initiative at the National University of Singapore aims to accelerate the decarbonization of shipping by developing ammonia-fueled marine engines. The innovative in-cylinder reforming gas recirculation (IRGR) design enhances combustion efficiency and reduces emissions. Collaborating with various institutions, the project seeks to establish Singapore as a leader in sustainable maritime technology.
At the GasTech 2025 Exhibition in Milan, Everllence, along with HD Hyundai Heavy Industries and HD Hyundai Mipo Dockyard, announced a strategic partnership to develop a next-generation medium-sized gas carrier powered by Everllence’s ammonia-fueled engine. This collaboration aims to advance zero-carbon propulsion in the maritime industry.
Amon Maritime from Norway has launched Amon Bulk, focusing on ammonia-fueled bulk carriers, backed by a NOK253 million grant from Enova. The initiative targets capesize and kamsarmax vessels, aiming for operational status by 2029. CEO André Risholm views this as a vital step toward decarbonizing deep-sea shipping.
Japan Engine Corporation has made significant strides in developing the first ammonia-fueled commercial shipping engine. Alongside major manufacturers like MAN and WindGD, they are close to certifying and shipping their engines. J-ENG successfully co-fired ammonia in a large engine, a major milestone. The company aims to lead in next-gen fuel engines.
A significant milestone in sustainable maritime energy has been achieved with the Approval-in-Principle certificate for an ammonia-fueled bunkering vessel. Designed by NYK and partners with expertise from Seatrium’s subsidiary, the vessel will undergo evaluation by the MPA to establish ammonia as a marine fuel, showcasing leadership in alternative fuels.
