‘Ammonia As A Propulsion Fuel’: A Step Forward


  • Lloyd’s register grants AiP to COSCO KHI Ship Engineering Co. Ltd. for ammonia fueled 16,000teu container ships.
  • The AiP was awarded after discussing all risk factors involving ammonia.
  • The parties all held research and discussion on tank layout, material, double walled pipe, fire control if in case of ammonia leakage

Lloyd’s Register has granted Nantong COSCO KHI Ship Engineering Co., Ltd. (NACKS) Approval in Principle (AiP) for an ammonia-fueled 16,000teu container ship. The AiP was presented at LR’s Nantong office and represents another step forward for ammonia as a container ship propulsion fuel.

Approval Process

The AiP was awarded following a risk-based HAZID certification in which the three partners discussed the flammable, highly toxic, and corrosive nature of ammonia and attended risk assessment seminars.

As part of the approval process, the three parties conducted research and discussions on the fuel tank layout, fuel tank material selection, vent mast positioning, double-walled pipe ventilation detection, bunkering station layout, and detection and fire control of ammonia leakage.


Ammonia has been identified as one of the most promising alternative fuels for zero-carbon shipping. Ammonia, unlike other alternative fuels, does not emit carbon dioxide when burned and may be able to meet future greenhouse gas emission standards.

Its stability and relatively low energy-to-volume ratio make it suitable for long-distance travel. The use of ammonia fuel in ultra-large container ships and the wider shipping sector is critical for the industry to meet the International Maritime Organization’s (IMO) strategy for reducing greenhouse gas emissions from ships.

It can be used in conjunction with alternative fuels like methanol and hydrogen to promote the development of green shipping.

Multiple projects

The AiP comes after a number of ammonia projects that LR was involved in, including Design Approval for DSME’s new dual fuel VLCC, AiP for Samsung Heavy Industry’s 85k–125k ammonia-fueled tanker, and AiP for Dalian Shipbuilding Industry Company (DSIC) 23,000 teu ammonia-fueled container ship.

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Source: LR


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