Techno-economic analysis of co-located corn grain and corn stover ethanol plants

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Biofuels, Bioproducts and Biorefining, ISSN: 1932-104X, Vol: 8, Issue: 3, Page: 412-422

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Ou, Longwen; Brown, Tristan R.; Thilakaratne, Rajeeva; Hu, Guiping; Brown, Robert C.
Energy; Chemical Engineering; ethanol; corn grain; corn stover; cellulosic ethanol; co-located plants; techno-economic analysis; Mechanical Engineering; Bioeconomy Institute
article description
The goal of this paper is to evaluate the economic performance of co-located corn grain ethanol (Gen 1) and cellulosic ethanol (Gen 2) facilities. We present six scenarios to evaluate the impact of stover-to-grain mass (SGM) ratios on overall minimum ethanol selling price (MESP). For the Gen 1 plant, MESP is $3.18/ gasoline gallon equivalent (GGE) while for the Gen 2 plant it is $5.64/GGE. Co-located Gen 1 and Gen 2 plants operating at the lowest SGM ratio of 0.4 generates the lowest overall MESP of $3.73/GGE as well as the highest MESP for cellulosic ethanol of $7.85/GGE. Co-located plants operating at the highest SGM ratio of 1.0 achieve the highest overall MESP of $3.94/GGE as well as the lowest MESP for cellulosic ethanol of $5.47/GGE. Sensitivity analysis shows that the prices of feedstocks have the greatest impact on the overall MESP. © 2014 Society of Chemical Industry and John Wiley & Sons, Ltd.