Ethanol Can Contribute to Energy and Environmental Goals

@article{Farrell2006EthanolCC,
  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},
  journal={Science},
  year={2006},
  volume={311},
  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
Bioenergy Research Needs for Heat, Electricity, and Liquid Fuels
Biomass remains a key energy source for several billion people living in developing countries, and the production of liquid biofuels for transportation is growing rapidly. However, both traditional
Algae biodiesel has potential despite inconclusive results to date.
Environmental Consequences of Ethanol from Corn Grain, Ethanol from Lignocellulosic Biomass, and Conventional Gasoline
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
Life cycle energy and greenhouse gas analysis for agave-derived bioethanol
The sustainability of large-scale biofuel production has recently been called into question in view of mounting concerns over the associated impact on land and water resources. As the most
Toward nitrogen neutral biofuel production.
Effects of ethanol on vehicle energy efficiency and implications on ethanol life-cycle greenhouse gas analysis.
TLDR
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
As demand for oil increases, production from large oil fields is declining at 4–5% annually, and the world production of oil is expected to peak around 2010. In the meantime, there is one liquid fuel
...
...

References

SHOWING 1-10 OF 83 REFERENCES
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
THE ENERGY BALANCE OF CORN ETHANOL REVISITED
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 ETHANOL ANSWER TO CARBON EMISSIONS
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
Gasohol: Does It or Doesn't It Produce Positive Net Energy?
TLDR
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.
Ethanol Production Using Corn, Switchgrass, and Wood; Biodiesel Production Using Soybean and Sunflower
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
...
...