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Estimating Greenhouse Gas Emissions in Corn-Ethanol Production using the BESS Model

Estimating Greenhouse Gas Emissions in Corn-Ethanol Production using the BESS Model. Adam J. Liska, Haishun S. Yang, Kenneth G. Cassman Department of Agronomy and Horticulture, University of Nebraska-Lincoln. BESS Model : Life-Cycle Energy & Emissions. BESS Model includes 4 components:

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Estimating Greenhouse Gas Emissions in Corn-Ethanol Production using the BESS Model

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  1. Estimating Greenhouse Gas Emissions in Corn-Ethanol Production using the BESS Model Adam J. Liska, Haishun S. Yang, Kenneth G. Cassman Department of Agronomy and Horticulture, University of Nebraska-Lincoln

  2. BESS Model : Life-Cycle Energy & Emissions BESS Model includes 4 components: • Crop production • Ethanol biorefinery • Cattle feedlot for feeding co-product distiller’s grains • Anaerobic digestion unit (optional, closed-loop facility) Three types of life-cycle analysis: • Energy analysis—life-cycle net energy yield & efficiency • Emissions analysis—net carbon dioxide (CO2) and trace greenhouse gases (CH4, N2O), and global warming potentional (GWP) • Resource Requirements—crop production area, grain, water, fossil fuels (petroleum, nat. gas, and coal)

  3. BESS results: Net Energy Ratio Corn Production System Ethanol Biorefineries www.bess.unl.edu

  4. GHG Emissions Reduction (%) Corn Production System Ethanol Biorefineries www.bess.unl.edu

  5. BESS Results: Default Scenarios #2-4 www.bess.unl.edu

  6. GHG-intensity of Corn production: BESS results Life-cycle GHG reduction compared to gasoline; w/ natural gas ethanol plant with dry distillers grains

  7. Support for BESS Development • Western Governor’s Association • Nebraska Energy Office • Environmental Defense • Nebraska Center for Energy Sciences Research • University of Nebraska-Lincoln, Institute of Agriculture and Natural Resources FREE Model Download: www.bess.unl.edu

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