Maersk completes first US ethanol bunkering for deep-sea containership
Maersk has completed its first commercial ethanol bunkering for a deep-sea containership in the United States, marking a significant step in the practical use of ethanol as a marine fuel. On 28 September, the company’s dual-fuel, alcohol-capable containership Tangier Maersk received U.S.-produced corn ethanol in Houston, supplied by POET. The operation used 100% bioethanol and involved coordination from Kirby Corporation, the Port of Houston, and the U.S. Coast Guard.
The delivery follows earlier ethanol trials aboard Laura Maersk and a 2,800-tonne bioethanol supply to Antonia Maersk in Barcelona. These developments, alongside a separate ethanol-methanol trial by X-Press Feeders in Rotterdam, indicate the shipping industry’s growing interest in ethanol as a viable fuel option. Maersk emphasized that wider deployment will depend on fuel availability, regulation, and operational readiness across the maritime value chain.
Maersk’s initial trials on Laura Maersk began with blended fuels, progressing from a 10% ethanol and 90% e-methanol mix to 50% ethanol. By July 2026, the vessel had tested 100% ethanol. The recent Houston operation adds another production source and supply location to Maersk’s growing experience with ethanol.
Other operators, such as X-Press Feeders, are also exploring ethanol. In May 2026, the Port of Rotterdam announced its first ethanol bunkering operation, involving a blend of biomethanol and second-generation ethanol. These projects are expanding the industry’s knowledge of fuel handling and performance, which will be crucial for ethanol’s broader adoption.
Ethanol’s potential compatibility with methanol propulsion technology is another key factor. DNV has suggested that methanol dual-fuel engines can be adapted for ethanol with minor modifications, offering flexibility for existing alcohol-fuelled ships. However, each application must be assessed for engine configuration, fuel systems, and approvals before switching fuels.
The development of ethanol-capable engines, such as Everllence’s G80 for large ore carriers, further strengthens the commercial case for fuel flexibility. As production capacity grows, the challenge will be ensuring reliable marine deliveries, verifiable emissions reductions, and commercially viable costs. The next step is repeatable commercial supply to confirm ethanol’s long-term role in shipping.