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Corn Based Ethanol

Corn Based Ethanol. By David Acselrod 4/12/07. Overview. Process History Viable Source of Energy Emissions Conclusion. Process. Cultivation of Corn Fermentation Distillation (95% Water Free) Dehydration (99.9% Water Free) Denaturing. History. Used as Fuel Since 1908

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Corn Based Ethanol

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  1. Corn Based Ethanol By David Acselrod 4/12/07

  2. Overview • Process • History • Viable Source of Energy • Emissions • Conclusion

  3. Process • Cultivation of Corn • Fermentation • Distillation (95% Water Free) • Dehydration (99.9% Water Free) • Denaturing

  4. History • Used as Fuel Since 1908 • Gasoline Found to be Cheaper (debatable) • Used as Knock Suppressive 1920s,1930s • Lead Found to be Cheaper (debatable) • 1973 Oil Embargo Renews Interests • Energy Tax Act of 1978, Reformations • Accounts Presently for 3% of US Fuel Use

  5. Viable Source of Energy • Net Energy Value (NEV) • Inputs • -Farm Energy • -Corn Transport • -Ethanol Conversion • -Distribution • +Coproducts (primarily animal feed) • Output • +Combustible Fuel (HHV≈84,000Btu/gal)

  6. Farm Energy Expended

  7. Energy Balance Before Coproducts

  8. Various Energy Balance Calculations

  9. Pimentel’s Calculations • Corn Yields Date from pre 1992 • Values for Energy to Create Fertilizer Come from 1990 Worldwide Values • Value for Energy Needed to Convert Corn to Ethanol (within plant) date pre 1980 • Assumes all Corn is Irrigated (only 16% is) • Low Energy Credits for Co-products

  10. Yield of Corn with Time

  11. Corn Yield per lb of Fertilizer

  12. Energy Use of Ethanol Plants

  13. Emissions • EPA Concludes that E-85 Reduces GHG Emissions by 20-25%

  14. Conclusion • Viable Source of Energy • Helps to Reduce GHGs • Helps to Reduce Dependency on Foreign Oil

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