Biofuels: Optimism and Concerns - Desert Research Institute

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Terminology for Liquid Transportation Fuels (Common terms, but not universally accepted) 1. Conventional Fuels: produced from petroleum 2. Alternative Fuels: produced from non-petroleum sources, including other fossil sources (coal, natural gas) 3. Renewable Fuels: produced from modern biological precursors (plants and animals) 4. Biofuels: synonymous with “Renewable Fuels” 5. 2 nd Generation Biofuels: Biofuels produced from non-food feedstocks – especially lignocellulose 6. Biodiesel: methyl esters produced from fats and oils 7. Renewable Diesel: non-fossil hydrocarbon fuel produced via hydroprocessing of fats and oils 8. Cellulosic Fuels: produced via biochemical or thermochemical conversion of lignocellulosic materials 9. Clean Fuels: ?? 8
Rapid Growth of Biofuels in the U.S. • Currently dominated by corn-based ethanol – 6.4 billion gallons in 2007 – Supplies about 4% of U.S. gasoline demand – Requires about 15% of U.S. corn crop • Biodiesel is growing, but still small – 0.45 billion gallons in 2007 – Supplies ~1% of U.S. diesel demand – Main feedstocks: • U.S. – soy oil and waste oils • Europe – rapeseed oil 9
Page 1 and 2: Biofuels: Optimism and Concerns 200
Page 3 and 4: Historical Energy Use in the U.S. (
Page 5 and 6: Quads U.S. Renewable Energy (2006;
Page 7: Benefits and Challenges of Biofuels
Page 11 and 12: Biomass Resource Base in U.S. Prima
Page 13 and 14: Potential U.S. Agricultural Biomass
Page 15 and 16: DOE’s Integrated Biorefinery Conc
Page 17 and 18: Life-Cycle Impacts of Biofuels Man
Page 19 and 20: General Observations Regarding LCA
Page 21 and 22: Promoting Responsible Growth of Bio
Page 23 and 24: Promoting Responsible Growth of Bio
Page 25 and 26: Summary and Conclusions (2 of 2) 3.

Biofuels: Optimism and Concerns - Desert Research Institute

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