Global Study Reveals Why Cellulosic Ethanol Stalled and Where It Is Finally Gaining Momentum

A new study published by Task 39 members in the journal Biofuels, Bioproducts and Biorefining provides a data-driven global assessment of the commercial progress of cellulosic ethanol, based on 15 years of monitoring by the IEA Bioenergy Task 39 Advanced Biofuels Demonstration Plants Database (Project 2 in the 2025-2027 triennium). The analysis explains why large-scale deployment of second-generation ethanol has advanced more slowly than expected, highlighting persistent technical barriers, high production costs, and unstable policy environments that have led to project cancellations and the idling of several flagship plants. Yet the authors also identify clear signs of renewed momentum, with emerging markets (especially Brazil and China) showing that cellulosic ethanol can scale when supported by abundant biomass, strong policy incentives, and integration with existing biofuel industries.

The report finds that global leadership in cellulosic ethanol is shifting, with Brazil’s sugarcane-bagasse model and China’s rapid expansion positioning both countries at the forefront of next-generation biofuel production. Governments and industries seek low-carbon, commercially viable, and sustainable fuels to meet climate and energy transition goals, and this study offers essential insights into the technologies, policies, and regional conditions shaping the future of advanced biofuels.

The full, open-access article is available at the journal’s website: https://doi.org/10.1002/bbb.70068

Key Findings presented by Task 39 members in this scientific paper:

• Global commercial progress slowed after 2015 as major U.S. and European plants were idled or closed.
• Technical barriers, including challenging biomass processing, enzyme costs, and solids handling, continue to limit process feasibility and demand more investigation.
• Policy uncertainty and competition from lower-cost first-generation biofuels undermined investor confidence.
• Brazil leads current large-scale deployment through integration with established sugarcane ethanol operations for low-cost feedstock supply.
• China now holds the highest estimated operational capacity, supported by national strategies for non-grain biofuels.

How to cite the paper:

Bacovsky, D., Sonnleitner, A., Leal Silva, J.F., and Souza, G.M. (2025), Tracking cellulosic ethanol: commercialization and regional insights. Biofuels, Bioprod. Bioref.. https://doi.org/10.1002/bbb.70068