This is a feature article (Oct 13, 2025) by Ankit Chandra that explores how ethanol can be integrated into marine fuel systems, discusses engine compatibility, supply chain challenges, and the potential role ethanol can play in the decarbonization of shipping.
The new Global Ethanol Association (GEA) has launched, with its first major program focused on the marine fuel sector. Their aim is to catalyze adoption of ethanol as part of a low-emission fuel mix.
WinGD, a Swiss marine engine manufacturer, plans to release ethanol-fuelled ship engines (newbuild and retrofits) starting 2027, supporting lower-emission shipping.
RaÃzen (Brazilian energy company) and Wärtsilä (marine power systems) have formed a partnership to test ethanol as a marine fuel, including lab engine trials and compliance assessments.
This academic study looks at blending bioethanol with marine fuels (up to 30%) and evaluating emission profiles and combustion behavior relative to conventional marine oil.
This article outlines ethanol’s strengths (renewability, cleaner combustion, infrastructure adaptability) and challenges (energy density, hygroscopicity, material compatibility, safety) for maritime use.
From the above sources, you can distill the following main points:
| Aspect | Insights / Findings |
|---|---|
| Technical Feasibility & Engine Development | WinGD is developing ethanol-capable engines (to be available in 2027) for newbuilds and retrofits. Ethanol can be used in engines designed for methanol, with only adjustments (injection valves, software) in some cases. |
| Emission & Environmental Benefits | Ethanol produced from biomass can lead to lower life‑cycle GHG emissions vs fossil fuels. Combustion experiments show reductions in particulate matter (PM), NOx, CO, compared to conventional marine fuels. |
| Challenges & Risks | Lower energy density: Ethanol has roughly half the energy per volume vs conventional marine fuels. This affects range and fuel tank requirements. Hygroscopic and corrosive nature: Ethanol absorbs water and can cause corrosion in tanks, pipes, engine components not designed for it. Safety & regulatory uncertainty: Low flashpoint, vapour behaviour, spill response, and absence of established rules for ethanol fuel use in shipping are concerns. |
| Market & Institutional Developments | The formation of the Global Ethanol Association (GEA) is a sign that stakeholders are coalescing around ethanol’s potential in marine applications. Decarbonization partnerships (e.g. RaÃzen + Wärtsilä) illustrate real-world testing and pilot efforts. |
