K Shipbuilding and Lloyd's Register have signed a memorandum of understanding to design a 50,000 deadweight ton ethanol fueled medium range tanker, the companies said in a joint press release. K Shipbuilding will lead vessel design, while Lloyd's Register will evaluate the ship's arrangement, stability, structural requirements and fuel tank integration. The goal is to secure Approval in Principle and produce a design competitive in the global product tanker market.
Approval in Principle would confirm the concept's preliminary compatibility with applicable maritime rules. It would not represent a vessel order, a completed engineering package or a commitment from a shipowner. No owner, engine supplier, construction timeline or fuel provider has been named yet.
Ethanol's Lower Energy Density Could Shrink Tanker Cargo Space
Medium range tankers already move ethanol and other liquid fuels between regional markets, giving the segment a production and transport network that some newer marine fuels still lack. Burning that cargo as propulsion fuel is a separate commercial question. It would require agreements covering ownership, fuel quality, customs treatment and charter party terms, plus separate storage and delivery systems to keep fuel from contaminating cargo.
Ethanol also carries less energy per unit of volume than conventional marine fuel. A ship running on it may need larger tanks or more frequent refueling, and space set aside for propulsion fuel typically reduces the cargo capacity that generates revenue on a product tanker. How K Shipbuilding handles that tradeoff will help determine whether the design holds up on longer routes.
Shared Chemistry With Methanol Could Speed Ethanol Adoption
Ethanol shares chemical properties with methanol, and some methanol capable engines may be able to burn it with limited retrofitting. Maersk has already completed trial voyages running a methanol capable vessel entirely on ethanol, and Vale is among the companies now evaluating ethanol fueled ships of its own. Owners already weighing the cost and supply constraints tied to methanol bunkering may see ethanol as a cheaper option built on similar equipment.
Ethanol holds roughly 35% more energy by volume than methanol and can cost less than green methanol supplies. A dual fuel or alcohol flexible tanker could appeal to owners more than an ethanol only vessel, since it would limit exposure to a single fuel market. Lloyd's Register and K Shipbuilding have not disclosed a proposed engine configuration.
Carbon intensity will also shape how owners buy ethanol. Emissions vary by feedstock, farming practice and refinery energy use, so verified low carbon supply is likely to command a premium over chemically identical but higher carbon fuel. That could put shipping in competition with road fuel and aviation fuel buyers for the same low carbon ethanol, and it could concentrate early bunkering around established production centers in Brazil and the U.S. Gulf Coast.
The project adds to a wider search for lower carbon marine fuels as new International Maritime Organization (IMO) emissions rules take hold, and it follows other alcohol and biofuel trials underway across the shipping industry. The next milestones to watch are a named shipowner, an engine selection, a firm vessel order and an ethanol supply agreement. Until those arrive, the partnership marks an early feasibility test rather than proof that ethanol fueled tankers are ready for wide deployment.
