World First: Commercial Green Ammonia Refueled Ship in Open Water, Closing Carbon-Free Fuel Chain
On October 13, 2026, a converted bunkering vessel pulled alongside a bulk carrier at an anchorage off Zhoushan, China, and pumped 1,000 tons of certified ammonia across a hose — completing the world’s first commercial ship-to-ship transfer of green ammonia as marine propulsion fuel. This operation answered the most stubborn practical question: yes, the complete supply chain now works, end to end, under real commercial conditions.
The receiving vessel, Mineral Europa, is the world’s first ammonia-powered dry bulk carrier in the 210,000-DWT class — a Newcastlemax-size ship built by CSSC Qingdao Beihai Shipbuilding in China for Belgium’s CMB.TECH. The company expects to take delivery of 21 ammonia-powered vessels by 2029, comprising 18 dry bulk carriers, one container ship, and two chemical tankers — most within the next nine months.
Six World Firsts in One Operation
Chinese state energy engineering firm CEEC described the Zhoushan bunkering as achieving six simultaneous world firsts: the first commercial ship-to-ship green ammonia bunkering at an open anchorage; the entry into service of the first dedicated liquid ammonia bunkering vessel; the implementation of the first take-or-pay sales contract for green ammonia in ocean shipping; the issuance of the first ship-to-ship liquid ammonia bunkering license; the first commercial ocean voyage by a 210,000-ton ammonia-powered bulk carrier; and the first full-chain carbon footprint traceability from a green ammonia production facility to a port storage tank.
How the Engine Actually Burns Ammonia — and What It Cannot Quite Do Yet
Mineral Europa is powered by a WinGD X72DF-A — a large-bore, two-stroke dual-fuel engine that runs ammonia as its primary fuel using high-pressure direct injection. In full-load testing at WinGD’s Engine Research and Innovation Centre in Winterthur, Switzerland, the design achieved diesel-equivalent thermal efficiency, while keeping ammonia slip below 10 parts per million and nitrous oxide (N₂O) below 3 ppm — without any exhaust after-treatment system.
The one caveat a technically literate reader should understand: today’s ammonia marine engines are not literally fossil-fuel-free. The X72DF-A requires approximately 5% conventional pilot oil by energy content at full load to ignite the ammonia in the cylinder. This means roughly 95% of the vessel’s propulsion energy comes from zero-carbon ammonia, with 5% from marine diesel oil. That is a vast improvement over a conventional vessel but is not net-zero combustion on its own — the well-to-wake carbon accounting will still require further refinement.
Original Article: World First: Commercial Green Ammonia Refueled Ship in Open Water, Closing Carbon-Free Fuel Chain — Techtimes