On May 4, 2021, the U.S. Department of Energy’s (DOE) Argonne National Laboratory published an article titled “Retrospective Analysis of the U.S. Corn Ethanol Industry for 2005-2019: Implications for Greenhouse Gas Emission Reductions.” Using a life-cycle analysis (LCA), researchers at the Argonne National Laboratory quantified the life cycle of greenhouse gas (GHG) emissions of fuels to compare relative GHG impacts among different fuel production pathways. According to the retrospective analysis conducted, since 2000, corn ethanol production in the United States quadrupled due to supportive biofuels policies such as the U.S. Environmental Protection Agency’s (EPA) Renewable Fuel Standard (RFS). Consequently, carbon intensity (CI) over the past 15 years has significantly decreased by 23 percent. Since 2000, the corn ethanol production pathway, including corn farming and biorefineries, has substantially evolved. Researchers state in the article that this shift into more efficient farming and biorefinery practices increases revenue while also potentially reducing the emission burdens of ethanol production. DOE’s Argonne National Laboratory researchers conclude that biofuels, including corn ethanol, can and likely will play a key role in decarbonizing the U.S. economy.
The article’s findings will also be used by DOE to update key corn ethanol parameters in the Argonne National Laboratory’s Greenhouse Gases, Regulated Emissions, and Energy Use in Technologies (GREET) Model 2021, which will be released in October 2021.