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An energy analysis of ethanol from cellulosic feedstock-Corn stover

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  • Luo, Lin
  • van der Voet, Ester
  • Huppes, Gjalt

Abstract

The shift from fossil resources to renewables for energy and materials production has been the driving force for research on energy analysis and environmental impact assessment of bio-based production. This study presents a detailed energy analysis of corn stover based ethanol production using advanced cellulosic technologies. The method used differs from that in LCA and from major studies on the subject as published in Science in two respects. First, it accounts for all the co-products together and so mainly avoids the allocation problems which plague all LCA studies explicitly and other studies implicitly. Second, the system boundaries only involve the content of the energy products used in the system but not the production processes of these energy products, like refining and electricity production. We normalized the six Science studies to this unified method. The resulting values of the total energy product use in both agricultural production and biomass conversion to ethanol are lower than these literature values. LCA-type of values including energy conversion would systematically be higher, in our case study around 45%. The net energy value of cellulosic ethanol production is substantially higher than the ones of the corn-based technologies, and it is similar to incineration and gasification for electricity production. The detailed analysis of energy inputs indicates opportunities to optimize the system. This form of energy analysis helps establishing models for the analysis of more complex systems such as biorefineries.

Suggested Citation

  • Luo, Lin & van der Voet, Ester & Huppes, Gjalt, 2009. "An energy analysis of ethanol from cellulosic feedstock-Corn stover," Renewable and Sustainable Energy Reviews, Elsevier, vol. 13(8), pages 2003-2011, October.
    • Handle: RePEc:eee:rensus:v:13:y:2009:i:8:p:2003-2011
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    References listed on IDEAS

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    1. Lavigne, Amanda & Powers, Susan E., 2007. "Evaluating fuel ethanol feedstocks from energy policy perspectives: A comparative energy assessment of corn and corn stover," Energy Policy, Elsevier, vol. 35(11), pages 5918-5930, November.
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