Biofuels Developed by Beth Morgan Dept. of Plant Biology.

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Presentation transcript:

Biofuels Developed by Beth Morgan Dept. of Plant Biology

Types of Biofuel: Ethanol Ethanol can be produced using: Miscanthus Switchgrass Sugar cane bagasse Corn stover Hybrid poplar

Biggest Suppliers

Increase in Production

Making Ethanol From Seed 1. Grow and collect grain. 2. Grind kernels into meal. 3. Heat and enzymes convert starch to sugar. 4. Anaerobic respiration by yeast. 5. Alcohol (ethanolº is distilled out of mixture. Ethanol

Energy Yield

Making Ethanol From Cellulosics: Cell Wall Breakdown

Making Ethanol From Cellulosics 1. Collection, storage & transportation to refinery. 2. Dirt & debris removed from material and then shredded into small particles. 3. Heat, pressure or acid treatment. Enzymes in solution are used to breakdown cellulose, hemicellulose to sugars. Lignin is removed. 4. Syrup of sugars is filtered from solids. 5. Anaerobic fermentation by bacteria to produce alcohol (and carbon dioxide). 6. Further enzymatic breakdown of cellulose and lignin. 7. Anaerobic fermentation by bacteria to produce alcohol (and carbon dioxide). 8. Alcohol is distilled. 9. More water removed. 10. Stored for distribution and use.

Types of Biofuel: Biodiesel Bio-diesel can be produced using: Jatropha tree Palm oil Camelina Algae

Making Biodiesel Biodiesel Water Washed Biodiesel Waste Vegetable Oil Lye MethanolMethoxide Methoxide WVO Glycerin Biodiesel Biodiesel Water Washed Biodiesel

BioFuel from Vegetable Oil

Pros: Energy Yield

For every unit of fossil energy used in the entire biodiesel production cycle, 3.2 units of energy are gained when the fuel is burned, or a positive energy balance of 320 percent.

Pros: Energy Yield Fuel Energy yieldNet (loss) or gain Gasoline0.805(19.5%) Diesel0.843(15.7%) Ethanol1.3434% Biodiesel3.2320% (gain is from photosynthesis)

Pros: Reduced Emissions Emissions of major air pollutants from diesel engines

Cons: Loss of Land for Food Production

Loss of Rainforests

Water Use Increases

Soil Fertility  Poplar trees Switchgrass harvest in the Netherlands Soybean harvest

Price of Corn 

Food vs. Fuel?