Corn Ethanol Could Open New Marine Fuel Market for Shipping

September 30, 2026 Ambreen Anwar

Corn ethanol could become a viable marine fuel for ocean-going vessels, potentially creating a major new market for US corn producers, according to a report by the National Lab of the Rockies. The report assesses the technical, economic and environmental potential of ethanol for marine shipping, highlighting its possible use as an alternative fuel for the shipping industry.

Researchers estimate that the existing fleet of methanol dual-fuel vessels alone could consume around 2 billion gallons of ethanol annually under high-substitution scenarios. Such adoption could create significant additional demand for ethanol while opening a new long-term market for US corn producers.

Ethanol Offers Lower Emissions and Toxicity

Ethanol has properties similar to methanol while offering lower emissions and lower toxicity, according to the report. It also has different environmental characteristics from conventional petroleum-based marine fuels in the event of a spill.

Ethanol dissolves quickly following a spill and accumulates less in the environment than conventional petroleum-based fuels. These properties are among the factors supporting further consideration of ethanol as an alternative marine fuel.

Potential Demand for US Corn Ethanol

Industry representatives believe that even partial adoption of ethanol in shipping could create billions of gallons of new demand. This could provide an additional long-term market for US corn producers, linking the biofuel and maritime sectors more closely.

The potential demand identified in the report is based on the existing fleet of methanol dual-fuel vessels and a high-substitution scenario. It therefore represents potential consumption rather than an established commercial market.

Cooperation Needed for Wider Marine Fuel Adoption

The report states that broader use of ethanol as a marine fuel will depend on closer cooperation between biofuel producers and shipping companies. Further research and practical deployment of the technology will also be necessary.

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Ethanol Adds Another Option to the Alternative Fuel Market

The findings point to a potential connection between the biofuel industry and maritime shipping, particularly through vessels already capable of using methanol-based dual-fuel systems. Ethanol’s similar properties to methanol, along with its lower emissions and lower toxicity, provide specific areas for further technical and environmental assessment.

However, wider adoption remains dependent on cooperation between fuel producers and shipping companies, as well as additional research and practical deployment. The 2 billion-gallon estimate applies to a high-substitution scenario, so it should be viewed as potential market demand rather than a current level of ethanol consumption in marine shipping.