Draft:NH₃ Kraken
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|  |
| History | |
|---|---|
 United States | |
| Name | NH₃ Kraken |
| Owner | Amogy Inc. |
| Operator | Amogy Inc. |
| Port of registry | New York, United States |
| Route | Demonstration and harbor operations |
| Builder | Jakobson Shipyard, Oyster Bay, New York |
| Launched | 1957 |
| Maiden voyage | 2024 (demonstration service) |
| In service | 2024–present |
| Renamed | 2024 (NH₃ Kraken) |
| Identification | IMO number: 8991918 |
| Status | Operational (demonstration vessel) |
| Notes | Converted to ammonia-electric propulsion by Amogy |
| General characteristics | |
| Class & type | Experimental tugboat |
| Length | 105 ft (32 m) |
| Beam | 27 ft (8.2 m) |
| Draft | 15 ft (4.6 m) |
| Installed power | ~1 MW (≈1,340 hp) |
| Propulsion | Ammonia-to-hydrogen fuel cell system with electric drivetrain |
| Notes | Retrofitted from a conventional diesel tug built in 1957 |
NH₃ Kraken is an experimental zero-emission tugboat powered by ammonia as fuel, developed and operated by the U.S.-based company Amogy. It is the first vessel to demonstrate a scalable ammonia-to-hydrogen power system for maritime propulsion, marking a milestone in the decarbonization of short-sea shipping.
History
[edit]Originally built in 1957 by Jakobson Shipyard of Oyster Bay, New York, the vessel served as a conventional diesel-powered harbor tug before being acquired by Amogy for conversion. In 2023–2024, the tug underwent a complete retrofit to integrate an ammonia-to-hydrogen reforming system coupled with electric propulsion, and was renamed NH₃ Kraken.[1]
Design and technology
[edit]NH₃ Kraken is equipped with a 1 MW ammonia-to-hydrogen fuel cell system, which reforms liquid ammonia on board into hydrogen in real time to power an electric motor. This configuration eliminates direct carbon dioxide emissions and provides higher volumetric energy density than compressed hydrogen, making it suitable for harbor operations.
The vessel stores approximately five metric tons of anhydrous ammonia in specially designed tanks. According to Amogy, the technology can be scaled to larger ships and potentially adapted to other sectors of heavy transport.[2][3]
Development
[edit]Amogy began the project in 2023 as part of its roadmap for maritime decarbonization using ammonia as a carbon-free energy carrier. The retrofit was conducted at a shipyard in New York, with initial shore-based testing followed by demonstration voyages in 2024 at the Port of New York and New Jersey.[4]
During testing, NH₃ Kraken demonstrated safe and efficient operation in real harbor conditions, showing the feasibility of ammonia-powered propulsion for tugboats and other small work vessels. According to coverage by Marine Insight and Offshore Energy, the demonstration was followed by a traditional maritime renaming ceremony marking the start of the vessel's operational phase.[5]
Significance
[edit]The launch of NH₃ Kraken was widely covered in international media, including the Associated Press, which described it as "a first-of-its-kind demonstration of ammonia as a clean marine fuel" and an important step in reducing emissions from shipping.[6]
The project supports the IMO greenhouse gas reduction targets for 2030 and 2050, and demonstrates ammonia's potential as a scalable, zero-carbon energy carrier for maritime and industrial use.[3]
See also
[edit]References
[edit]- ^ "NH3 Kraken". TugboatInformation.com. Retrieved 18 October 2025.
- ^ "Amogy sails clean ammonia-run boat in US". Argus Media. March 2024. Retrieved 18 October 2025.
- ^ a b "NH₃ Kraken, world's first carbon-free ammonia powered tug". Offshore Energy. March 2024. Retrieved 18 October 2025.
- ^ "Amogy secures additional $23 million in venture funding". WorkBoat. March 2024. Retrieved 18 October 2025.
- ^ "World's First Carbon-free, Ammonia-powered Vessel Completes Traditional Maritime Renaming Ceremony". Marine Insight. March 2024. Retrieved 18 October 2025.
- ^ "Tugboat powered by ammonia sails for the first time, showing how to cut emissions from shipping". Associated Press. March 2024. Retrieved 18 October 2025.
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