NYK has launched a one-year demonstration project involving the continuous use of 100% biofuel (B100) aboard one of its car carriers, as part of the company’s efforts to advance low-carbon shipping operations.
The trial is designed to assess the impact of B100 on onboard equipment and confirm operational safety under actual vessel operating conditions. Through the program, NYK aims to build technical knowledge that could support wider use of high-purity biofuels and contribute to reducing greenhouse gas (GHG) emissions in maritime transport.
The initiative comes as the shipping industry increases the use of alternative fuels to support decarbonization. Biofuels are viewed as a drop-in fuel because they can be used with existing ship engines and bunkering infrastructure.
NYK has previously advanced biofuel use through several initiatives. In 2024, the company conducted a trial using B24 biofuel blend and later expanded practical application to B30. However, global experience with long-term continuous operation on B100 remains limited.
During the new trial, the car carrier will operate continuously on B100 for one year. The company will evaluate the fuel’s effects on engines, fuel supply systems and onboard operations. The program will also examine fuel management issues, as high-purity biofuels such as B100 can degrade when exposed to oxygen, light and heat, raising concerns over stability during extended use.
Operational data collected throughout the trial will be used to support safe vessel operation and broader adoption of high-purity biofuels.
NYK said biofuels can reduce lifecycle, or well-to-wake, GHG emissions compared with conventional fossil fuels. Based on the trial findings, the company will continue technical evaluations and pursue initiatives aimed at sustainable maritime transportation.
