Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.
Biofuels Developed by Beth Morgan Dept. of Plant Biology
Corn stover Miscanthus Hybrid poplar Sugar cane bagasse Switchgrass Types of Biofuel: Ethanol Ethanol can be produced using:
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
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.
Algae Jatropha tree Palm oil Camelina Types of Biofuel: Biodiesel Bio-diesel can be produced using:
Waste Vegetable Oil Lye Methoxide Methanol Washed Biodiesel Methoxide Water Biodiesel Biodiesel WVO Glycerin Washed Biodiesel Water Making Biodiesel Biodiesel
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 (gain is from photosynthesis)
Pros: Reduced Emissions Emissions of major air pollutants from diesel engines
Poplar trees Switchgrass harvest in the Netherlands Soybean harvest Soil Fertility