Ethanol Can Contribute to Energy and Environmental Goals

  title={Ethanol Can Contribute to Energy and Environmental Goals},
  author={Alex Farrell and Richard J. Plevin and Brian T. Turner and Andrew D. Jones and Michael O'hare and Daniel M. Kammen},
  pages={506 - 508}
To study the potential effects of increased biofuel use, we evaluated six representative analyses of fuel ethanol. Studies that reported negative net energy incorrectly ignored coproducts and used some obsolete data. All studies indicated that current corn ethanol technologies are much less petroleum-intensive than gasoline but have greenhouse gas emissions similar to those of gasoline. However, many important environmental effects of biofuel production are poorly understood. New metrics that… 
Sugarcane and Ethanol Production and Carbon Dioxide Balances
Ethanol fuel has been considered lately an efficient option for reducing greenhouse gases emissions. Brazil has now more than 30 years of experience with large-scale ethanol production. With
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The Energy Policy Act of 2005 includes a provision designed to double the production and use of ethanol in fuels by 2012, and that beginning in 2013, a minimum of 250 million gallons per year of
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It is argued that due to the increased emphasis on alternative fuels with drastically differing energy densities, vehicle efficiency should be evaluated based on energy rather than volume, and shows that efficiency of existing vehicles can be affected by ethanol content.
Energy lifecycle assessment and environmental impacts of ethanol biofuel
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Ethanol as Fuel: Energy, Carbon Dioxide Balances, and Ecological Footprint
Abstract The major contributor to global warming is considered to be the high levels of greenhouse gas emissions, especially carbon dioxide (CO2), caused by the burning of fossil fuel. Thus, to
Studies conducted since the late 1970s have estimated the net energy value (NEV) of corn ethanol. However, variations in data and assumptions used among the studies have resulted in a wide range of
The Energy Balance of Corn Ethanol: An Update
Studies conducted since the late 1970s have estimated the net energy value (NEV) of corn ethanol. However, variations in data and assumptions used among the studies have resulted in a wide range of
The United States is responsible for about 25% of the world's total carbon emissions, and Americans' per capita emissions are five times the world average. A major source of carbon emissions is the
Biomass as Feedstock for A Bioenergy and Bioproducts Industry: The Technical Feasibility of a Billion-Ton Annual Supply
The U.S. Department of Energy (DOE) and the U.S. Department of Agriculture (USDA) are both strongly committed to expanding the role of biomass as an energy source. In particular, they support biomass
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A detailed analysis of energy inputs and outputs is performed on grain-based gasohol, finding that it is an unambiguous energy producer since most energy inputs to the process can be supplied by nonpetroleum sources such as coal.
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Energy outputs from ethanol produced using corn, switchgrass, and wood biomass were each less than the respective fossil energy inputs. The same was true for producing biodiesel using soybeans and
Allocation procedure in ethanol production system from corn grain i. system expansion
We investigated the system expansion approach to net energy analysis for ethanol production from domestic corn grain. Production systems included in this study are ethanol production from corn dry