Key Takeaways
- • The International Maritime Organization (IMO) in May 2026 established a carbon footprint benchmark for Brazilian second-crop corn ethanol at 20.8 grams of CO2-equivalent per megajoule, significantly below the shipping sector's current average of 93.3 grams CO2e/MJ for conventional bunker fuel.
- • Brazilian corn ethanol production has surged to nearly 10 billion liters in the 2025/26 season (up from 2.65 billion liters at the start of the decade), positioning the country to capture emerging maritime fuel demand as shipping decarbonization regulations take effect.
- • The IMO regulatory approval removes a critical hurdle for maritime adoption of Brazilian biofuels and opens a major new market channel for corn ethanol producers, who may now command premiums on low-carbon fuel sales to shipping operators.
- • Industry executives, including Inpasa's Gustavo Mariano and FS Fueling Sustainability CEO Rafael Abud, characterized the IMO carbon definition as a "historic and symbolic milestone" that consolidates Brazil's competitive position in global fuel decarbonization.
- • Producers are investing in emissions reduction across biomass sourcing, industrial efficiency, and carbon capture technologies; FS Fueling Sustainability is developing a bioenergy-with-carbon-capture project that could render its ethanol carbon negative.
Summary
The International Maritime Organization's May 2026 decision to define Brazilian second-crop corn ethanol's carbon footprint at 20.8 grams of CO2-equivalent per megajoule represents a watershed moment for both the biofuels sector and maritime decarbonization efforts. The established benchmark sits 77.8% below the shipping industry's prevailing average of 93.3 grams CO2e/MJ for conventional bunker fuel, creating substantial room for carbon intensity arbitrage as global shipping regulations tighten.
Brazil's corn ethanol industry has experienced rapid expansion, with output climbing to approximately 10 billion liters during the 2025/26 season—nearly a fourfold increase from 2.65 billion liters at the decade's outset, according to industry association UNEM. This production trajectory reflects a strategic diversification away from the country's traditional sugarcane-ethanol dominance. The IMO's regulatory framework, which governs lower-carbon fuel adoption, now positions Brazilian corn ethanol as the first marine-compatible biofuel to receive formal carbon intensity approval, eliminating a critical regulatory barrier to maritime market entry.
Industry leaders view the IMO approval as a foundational step toward unlocking financial premiums on decarbonized fuels. Gustavo Mariano, vice president of trading at Inpasa, characterized the decision as a "historic and symbolic milestone" that affirms South American corn ethanol's viability for global decarbonization. Rafael Abud, CEO of corn ethanol producer FS Fueling Sustainability, emphasized that investments in emissions reduction across biomass management, production efficiency, and carbon capture technology position producers to capitalize on emerging price differentials. FS Fueling Sustainability is advancing a bioenergy-with-carbon-capture-and-storage (BECCS) project with potential to achieve carbon-negative status, strengthening competitive positioning ahead of enforcement of IMO decarbonization frameworks.
The regulatory approval addresses longstanding logistical and certification hurdles but leaves unresolved questions regarding supply chain infrastructure, blending protocols, and port-terminal handling capacity. Maritime shipping operators seeking low-carbon compliance pathways now have access to an IMO-validated fuel alternative with substantial emissions reduction potential, potentially reshaping global bunker fuel economics and accelerating capital reallocation toward biomass-based marine fuels.
Brazil's corn ethanol industry has experienced rapid expansion, with output climbing to approximately 10 billion liters during the 2025/26 season—nearly a fourfold increase from 2.65 billion liters at the decade's outset, according to industry association UNEM. This production trajectory reflects a strategic diversification away from the country's traditional sugarcane-ethanol dominance. The IMO's regulatory framework, which governs lower-carbon fuel adoption, now positions Brazilian corn ethanol as the first marine-compatible biofuel to receive formal carbon intensity approval, eliminating a critical regulatory barrier to maritime market entry.
Industry leaders view the IMO approval as a foundational step toward unlocking financial premiums on decarbonized fuels. Gustavo Mariano, vice president of trading at Inpasa, characterized the decision as a "historic and symbolic milestone" that affirms South American corn ethanol's viability for global decarbonization. Rafael Abud, CEO of corn ethanol producer FS Fueling Sustainability, emphasized that investments in emissions reduction across biomass management, production efficiency, and carbon capture technology position producers to capitalize on emerging price differentials. FS Fueling Sustainability is advancing a bioenergy-with-carbon-capture-and-storage (BECCS) project with potential to achieve carbon-negative status, strengthening competitive positioning ahead of enforcement of IMO decarbonization frameworks.
The regulatory approval addresses longstanding logistical and certification hurdles but leaves unresolved questions regarding supply chain infrastructure, blending protocols, and port-terminal handling capacity. Maritime shipping operators seeking low-carbon compliance pathways now have access to an IMO-validated fuel alternative with substantial emissions reduction potential, potentially reshaping global bunker fuel economics and accelerating capital reallocation toward biomass-based marine fuels.
Go deeper than the headline
Research every firm in this story, track the ones that matter and get the daily briefing — free for 7 days.