World’s First Oceangoing Ammonia Dual-Fuel Vessel Delivered
Our take
The delivery of the *Antwerpen*, the world’s first oceangoing ammonia dual-fuel vessel, marks a significant, albeit incremental, step toward decarbonizing maritime shipping. While geopolitical instability in critical waterways continues to present immediate challenges – as evidenced by recent reports of naval actions in the Strait of Hormuz [Iran Announces ‘Strait Of Hormuz’ Is Closed After U.S Attacks Iranian Sites Near Strategic Waterway] and subsequent disruptions to commercial transit – innovations like this dual-fuel vessel demonstrate a tangible commitment to long-term sustainability. The potential for a 90% reduction in greenhouse gas emissions compared to conventional fuels is a compelling figure, and one that warrants careful, empirical validation as the *Antwerpen* enters service. This development should be contextualized against the ongoing need for resilient and secure maritime trade routes, a factor increasingly impacted by regional conflicts and evolving climate patterns. The discovery of a new species of deep-sea octopus [This tiny, blue octopus is new to science] also reminds us of the fragility of the marine ecosystems that underpin global trade and the urgent need for responsible stewardship.
The shift to ammonia as a marine fuel is not without its complexities. While offering a pathway to near-zero emissions at the point of combustion, the production of ammonia itself currently relies heavily on fossil fuels, creating a potential “well-to-wake” emissions gap. A truly sustainable transition requires integrated solutions – green ammonia production powered by renewable energy, alongside the development of robust, validated infrastructure for safe storage and bunkering. The *Antwerpen’s* deployment will provide valuable, longitudinal data on the performance of ammonia-fueled engines under real-world operating conditions, informing future design improvements and regulatory frameworks. The inherent safety considerations associated with ammonia handling, including toxicity and flammability, demand rigorous adherence to best practices and continuous monitoring, ensuring that emissions reductions do not come at the expense of crew safety or environmental risk.
The adoption of ammonia dual-fuel technology is also a testament to the accelerating pace of innovation in the maritime sector. HD Hyundai’s construction of the *Antwerpen* reflects a broader trend of shipyards and engine manufacturers investing in alternative fuel technologies. However, the transition to a new fuel ecosystem requires coordinated action across the entire value chain, from fuel producers to port operators and regulatory bodies. A fragmented approach risks inefficiencies and delays, hindering the widespread adoption of cleaner maritime solutions. The implementation of stringent, peer-reviewed standards for ammonia fuel quality and emissions monitoring will be crucial for building trust and ensuring that the claimed environmental benefits are realized. Furthermore, the economic viability of ammonia as a marine fuel will depend on factors such as production costs, infrastructure availability, and government incentives.
Ultimately, the *Antwerpen* represents a critical proof-of-concept, demonstrating the technical feasibility of ammonia dual-fuel propulsion. The success of this vessel, and others following in its wake, will hinge on addressing the broader systemic challenges associated with transitioning to a decarbonized maritime sector. Moving forward, the question becomes not just *can* we operate ships on ammonia, but *how* can we build an integrated data ecosystem—encompassing fuel production, storage, bunkering, and operational performance—that ensures a truly sustainable and resilient future for global maritime trade.
A Belgian gas carrier has become the first oceangoing ship to run on an ammonia-fueled engine, a notable step in shipping’s slow shift toward zero-carbon fuels.
The vessel, a midsize gas carrier named Antwerpen, was delivered to owner EXMAR on June 10 after a development program that ran more than three years. EXMAR, an Antwerp-based gas shipping and infrastructure group, called the handover a historic moment for low-carbon shipping.
Antwerpen was built by HD Hyundai Heavy Industries in South Korea. It is the product of a multi-partner effort that brought together engine designer WinGD, engine builder HD Hyundai Engine Machinery Division, fuel-system supplier Nord Gas Solutions — formerly Wärtsilä Gas Solutions — and classification society Lloyd’s Register.
The ship can carry up to 46,000 cubic metres of ammonia or LPG, and it can burn the same ammonia it transports as fuel. That dual-fuel capability is the breakthrough. Running on low-carbon ammonia, EXMAR says, the vessel emits close to zero greenhouse gases, cutting emissions by as much as 90 percent against a conventional ship.
At its heart is a WinGD X-DF-A two-stroke engine. The unit injects ammonia at high pressure and adds only a small pilot dose of conventional fuel — about five percent at full load — to ensure clean combustion. Shaft generators and a selective catalytic reduction system, which strips nitrogen oxides from the exhaust, complete the propulsion package.
Ammonia appeals as a marine fuel because it carries no carbon. It is also toxic, which put safety at the centre of the design. The vessel is fitted with real-time gas detectors to catch leaks and an ammonia purge recovery unit, among other detection and mitigation systems. EXMAR leaned on four decades of experience hauling ammonia as cargo, working with the Belgian maritime administration and Lloyd’s Register to build the rules and safety case for using it in the engine room.
Antwerpen measures 190 metres in length and 27,000 deadweight tonnes. EXMAR had the design stretched by 10 metres, with a slightly wider beam, to fit more cargo than a standard carrier of its class.
The ship is the first of four ammonia dual-fuel gas carriers EXMAR has ordered from HD Hyundai, each named after a Belgian city. Antwerpen and its sister Arlon were named at the Ulsan yard in April. Two more are due later this year, with the fourth following in early 2027.
The delivery arrives as regulators and owners weigh ammonia’s place in a decarbonising fleet. The International Maritime Organization approved interim guidelines for using ammonia cargo as fuel on gas carriers in May, clearing a key hurdle. HD Hyundai pointed to International Energy Agency forecasts that ammonia could supply 8 percent of marine fuel demand by 2030 and nearly half by 2050.
For EXMAR, the handover turns a long-running engineering project into a working ship. “Ammonia propulsion is no longer theoretical—we are deploying it,” said Carl-Antoine Saverys, the group’s chief executive. The real test now begins at sea, where Antwerpen’s performance will help shape the vessels — and the regulations — that come next.
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