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Ethanol: A Renewable Energy Source Transforming Transportation

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Ethanol is a renewable fuel derived from various plant materials and plays a significant role in the U.S. transportation sector. Most gasoline in the U.S. contains ethanol, with E85 blends consisting of 51-83% ethanol. While corn is a primary source, future developments may focus on cost-effective production from cellulosic biomass. Ethanol offers several advantages, including lower greenhouse gas emissions and biodegradability. However, it has disadvantages like lower energy content compared to gasoline and higher production costs.

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Ethanol: A Renewable Energy Source Transforming Transportation

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  1. Ethanol Emily Richards

  2. Source of Energy • Ethanol is a renewable fuel made from various plant materials. The use of ethanol is widespread—almost all gasoline in the U.S. contains ethanol in a low-level blend. Ethanol is also available as E85—a gasoline-ethanol blend containing 51% to 83% ethanol, depending on geography and season. • Corn is only one source of ethanol. As we develop new, cost-effective methods for producing biofuels, a significant amount of ethanol will be made from more abundant cellulosic biomass sources.

  3. Cost • $4.18 per gallon ethanol • ~$3.20 per gallon gas • 12 billion gallons of corn ethanol has the btu equivalence of 9 billion gallons of gasoline -- roughly 6.5% of the U.S. gasoline supply of 140 billion gallons.

  4. Availability • Renewable resource • Less emissions produced than gasoline

  5. Use • Can be used to replace gasoline • Ex: Can be used in cars

  6. Advantages • Biofuels have the potential to significantly reduce global GHG emissions associated with transportation • Greenhouse gas emissions will decrease dramatically as biofuels of the future • Each gallon of ethanol produced from corn today delivers one third or more energy than is used to produce it. • Ethanol readily biodegrades without harm to the environment, and is a safe, high-performance replacement for fuel additives such as MTBE.

  7. Disadvantages • Ethanol delivers less energy than gasoline on a gallon-per-gallon basis • Not as commonly used, expensive to make it more available to the public

  8. Works Cited • http://energy.gov/sites/prod/files/edg/news/archives/documents/Myths_and_Facts.pdf • http://www.afdc.energy.gov/afdc/fuels/ethanol_benefits.html • http://www.eia.gov/kids/energy.cfm?page=tl_ethanol • http://www.ethanol.org/

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