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Title :

Comparison of Energy Yields with Energy Expenditures

Description :

The fossil energy–replacement ratio (FER) compares energy yield from four energy sources with the amount of fossil fuel used to produce each source. Note that the cellulosic ethanol biorefinery’s projected yield assumes future technological improvements in conversion efficiencies and advances that make extensive use of a biomass crop’s noncellulosic portions for cogeneration of electricity. Similar assumptions would raise corn ethanol’s FER if, for example, corn stover were to replace current natural gas usage. The corn ethanol industry, already producing ethanol as an important additive and fuel extender, is providing a foundation for expansion to cellulosic ethanol.

Citation :

U.S. DOE. 2006. Breaking the Biological Barriers to Cellulosic Ethanol: A Joint Research Agenda, DOE/SC/EE-0095, U.S. Department of Energy Office of Science and Office of Energy Efficiency and Renewable Energy, http://genomicscience.energy.gov/biofuels/.

Credit or Source :

Figure, based on the Argonne National Laboratory GREET model, is derived from Brinkman et al. 2005. Other papers that support this study include Farrell et al. 2006 and Hammerschlag 2006.,Adapted from http://www.anl.gov/Media_Center/News/2005/news050823.html

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