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Nonrenewable energy cost of corn-ethanol in China

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  • Yang, Q.
  • Chen, G.Q.

Abstract

Nonrenewable energy cost is accounted for the believed renewable biofuel of corn-ethanol in China. By a process-based energy analysis, nonrenewable energy cost in the corn-ethanol production process incorporating agricultural crop production, industrial conversion and wastewater treatment is conservatively estimated as 1.70 times that of the ethanol energy produced, corresponding to a negative energy return in contrast to the positive ones previously reported. Nonrenewable energy cost associated with wastewater treatment usually ignored in previous researches is shown important in the energy balance. Denoting the heavy nonrenewability of the produced corn-ethanol, the calculated nonrenewable energy cost would rise to 3.64 folds when part of the nonrenewable energy cost associated with water consumption, transportation and environmental remediation is included. Due to the coal dominated nonrenewable energy structure in China, corn-ethanol processes in China are mostly a conversion of coal to ethanol. Validations and discussions are also presented to reveal policy implications against corn based ethanol as an alternative energy in long term energy security planning.

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  • Yang, Q. & Chen, G.Q., 2012. "Nonrenewable energy cost of corn-ethanol in China," Energy Policy, Elsevier, vol. 41(C), pages 340-347.
    • Handle: RePEc:eee:enepol:v:41:y:2012:i:c:p:340-347
    DOI: 10.1016/j.enpol.2011.10.055
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