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Life cycle assessment and life cycle costing of bioethanol from sugarcane in Brazil

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

Abstract

Brazil has always been the pioneer in the application of bioethanol as a main fuel for automobiles, hence environmental and economic analyses of the Brazilian ethanol industries are of crucial importance. This study presents a comparative life cycle assessment (LCA) on gasoline and ethanol as fuels, and with two types of blends of gasoline with bioethanol, all used in a midsize car. The focus is on a main application in Brazil, sugarcane based ethanol. The results of two cases are presented: base case--bioethanol production from sugarcane and electricity generation from bagasse; future case--bioethanol production from both sugarcane and bagasse and electricity generation from wastes. In both cases sugar is co-produced. The life cycles of fuels include gasoline production, agricultural production of sugarcane, ethanol production, sugar and electricity co-production, blending ethanol with gasoline to produce E10 (10% of ethanol) and E85 (85%), and finally the use of gasoline, E10, E85 and pure ethanol. Furthermore, a life cycle costing (LCC) was conducted to give an indication on fuel economy in both cases. The results show that in the base case less GHG is emitted; while the overall evaluation of these fuel options depends on the importance attached to different impacts. The future case is certainly more economically attractive, which has been the driving force for development in the ethanol industry in Brazil. Nevertheless, the outcomes depend very much on the assumed price for crude oil. In LCC a steady-state cost model was used and only the production cost was taken into account. In the real market the prices of fuels are very much dependent on the taxes and subsidies. Technological development can help in lowering both the environmental impact and the prices of the ethanol fuels.

Suggested Citation

  • Luo, Lin & van der Voet, Ester & Huppes, Gjalt, 2009. "Life cycle assessment and life cycle costing of bioethanol from sugarcane in Brazil," Renewable and Sustainable Energy Reviews, Elsevier, vol. 13(6-7), pages 1613-1619, August.
    • Handle: RePEc:eee:rensus:v:13:y:2009:i:6-7:p:1613-1619
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    References listed on IDEAS

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