Ethanol vs Methanol for Ships: The Fuel Economics Owners May Be Missing
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Methanol has spent years building a lead at sea, and it deserves that lead. Engines are operating, bunker procedures are settling down and major ports know what they are dealing with. Ethanol is coming at the same problem from the opposite direction. The marine market is barely established, but the fuel itself is already produced and traded at enormous scale. Everllence's successful G80 ethanol test for a Vale-chartered ore carrier now raises a useful question for owners: if one engine can burn fuel oil, methanol, ethanol or blends of the two alcohols, does the smartest fuel strategy become flexibility rather than picking a winner?
Ethanol has moved beyond the test cell
The G80 engine is important, but the wider 2026 timeline shows that ethanol's maritime transition has already started.
Eco Levant receives a 90% biomethanol and 10% second-generation ethanol fuel combination in Rotterdam's first ethanol bunkering operation.
CMA CGM IRON receives roughly 500 tonnes of Brazilian sugarcane bioethanol in the first such deep-sea containership operation in Brazil.
Everllence completes R&D testing of its G80 ethanol-capable engine at HD Hyundai Heavy Industries' Engine & Machinery division.
The engine is scheduled for the third ship in Shandong Shipping's ten-vessel, Vale-chartered VLOC programme.
Vale's separately contracted 325,000-dwt Guaibamax vessels are intended to operate primarily on ethanol with methanol and conventional fuel flexibility.
Ethanol vs methanol: the owner-side comparison
Chemically similar fuels can produce very different commercial outcomes once tank space, bunker pricing, supply chains and standards are included.
| Decision factor | Ethanol | Methanol | Owner / operator read |
|---|---|---|---|
| IMO lower calorific value | 26.8 MJ/kg | 19.9 MJ/kg | Ethanol carries about 34.7% more energy per tonne. |
| Volumetric energy | ~21.27 MJ/L | ~15.96 MJ/L | For equal delivered energy, ethanol requires roughly 25% less tank volume. |
| Physical storage | Ambient liquid | Ambient liquid | Neither needs cryogenic storage. Both remain low-flashpoint fuels requiring dedicated safety arrangements. |
| Approx. flash point | ~13°C | ~11°C | Both sit firmly inside the low-flashpoint-fuel safety regime. |
| IMO safety framework | COVERED | COVERED | MSC.1/Circ.1621 explicitly addresses ships using methyl and ethyl alcohol as fuel. |
| Class guidance | AVAILABLE | MATURE | LR's 2026 guidance covers both methyl and ethyl alcohol installations. |
| Dedicated marine fuel specification | DEVELOPING | ISO 6583:2024 | Fuel-quality standardization is one of methanol's clearest present advantages. |
| Dedicated bunkering standard | Less developed | ISO 22120:2026 | Methanol now has a dedicated international bunkering specification covering transfer, risk, safety and training. |
| Marine bunkering maturity | Demonstrations in major ports including Rotterdam and Santos | Commercial operations and dedicated frameworks in major bunkering hubs | Ethanol has proved transfer is possible. Methanol has moved further into repeatable marine-fuel operations. |
| Existing global production base | 32 billion gallons of fuel ethanol in 2025 | More than 110 million tonnes of total methanol annually | Both are large commodity industries, but their production bases serve very different existing markets. |
| Renewable supply today | Large established biofuel industry | About 0.9 million tonnes of renewable methanol production reported by the industry | Most global methanol production remains conventional. The carbon value of either fuel depends on the actual production pathway. |
| Lifecycle GHG potential | Vale cites up to 90% WtW reduction for second-generation ethanol versus HFO | Very low-carbon pathways possible with biomethanol and e-methanol | Neither molecule guarantees a low-carbon result. Feedstock, process energy and certification determine compliance value. |
| Current marine fleet experience | EARLY | ESTABLISHED LEAD | Methanol has hundreds of capable vessels operating or on order. Ethanol is only beginning to build dedicated marine operating data. |
| Engine optionality | Everllence's G80 platform can operate on fuel oil, methanol, ethanol or methanol/ethanol blends. | This changes the discussion from fuel selection to fuel procurement flexibility. | |
The $/tonne comparison can fool you
Fuel buyers usually see a price per tonne first. With ethanol and methanol, that is not an apples-to-apples number.
Based on IMO lower calorific values, ethanol can cost approximately 34.7% more per tonne than methanol and still have the same raw fuel cost per unit of energy.
| Methanol bunker price | Energy-equivalent ethanol price | Interpretation |
|---|---|---|
| $400/t | ~$539/t | Ethanol below roughly $539/t would carry a lower raw fuel cost per GJ. |
| $500/t | ~$673/t | A $150/t headline premium for ethanol would not necessarily mean more expensive propulsion energy. |
| $600/t | ~$808/t | The higher ethanol energy density creates substantial price headroom. |
| $700/t | ~$943/t | Comparing only bunker quotations per tonne can materially distort the fuel decision. |
| $800/t | ~$1,077/t | The correct comparison is cost per delivered unit of propulsion energy, adjusted for efficiency and pilot fuel. |
Ethanol's unusual advantage is that shipping does not have to create the commodity
The challenge is converting an established road-fuel and industrial supply chain into a certified marine bunker chain at the ports where ships need it.
2025 global fuel ethanol production
Those three markets accounted for roughly 87% of the world's 32 billion gallons of fuel ethanol production in 2025. That concentration is both an opportunity and a limitation: ethanol could become especially compelling on routes touching major production regions before it becomes a truly global bunker fuel.
The maritime conversion problem
Existing ethanol volume does not automatically become marine fuel. Shipping still needs marine-grade specifications, custody-transfer rules, compatible bunker barges, alcohol-resistant firefighting systems, fuel-quality assurance, sustainability certification and long-term offtake contracts.
Santos demonstrated one possible model in July 2026: existing Brazilian bioethanol production, dedicated port storage, a modified bunker barge, additional emergency procedures and a vessel already certified for alcohol-fuel operation.
Where each fuel currently has the stronger hand
- About 35% more energy per tonne than methanol.
- Roughly 25% less tank volume for equivalent energy.
- Very large existing renewable-fuel production base.
- Strong production positions in the U.S., Brazil and India.
- Potentially attractive certified biofuel pathways without first building an e-fuel industry from scratch.
- Can leverage engine technology originally developed for methanol.
- Much larger maritime orderbook and operating fleet.
- Established engine experience across multiple vessel types.
- Dedicated international marine fuel specification.
- Dedicated ISO bunkering standard published in 2026.
- Commercial bunkering procedures developing at major hubs.
- Shipowners, class, ports and suppliers have accumulated years of practical experience.
- Long-term marine ethanol pricing and contract structures.
- Dedicated marine ethanol fuel-quality specification.
- Repeatable bunkering availability outside production regions.
- Water control, contamination and materials management at marine scale.
- Verified well-to-wake intensity for each feedstock and production route.
- How owners value the ability to switch between methanol and ethanol when regional prices move apart.
Ethanol vs Methanol Marine Fuel Parity Tool
Compare annual fuel tonnage, bunker cost, liquid volume and the ethanol price that produces the same energy cost as methanol.
Price inputs are illustrative and are not live bunker quotations. Physical calculations use IMO lower calorific values of 19.9 MJ/kg for methanol and 26.8 MJ/kg for ethanol. Volumetric calculations use U.S. DOE lower-heating-value data. Actual ship consumption also depends on engine efficiency, pilot fuel, auxiliaries and operating profile.
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