Atmospheric impacts of the life cycle emissions of fuel ethanol in Brazil: based on chemical exergy.
Atmospheric impacts of the life cycle emissions of fuel ethanol in Brazil: based on chemical exergy.
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DOI：
10.1016/j.jclepro.2009.09.003
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发表时间：
2010
影响因子：
11.1
通讯作者：
A. R. Ometto;W. Roma
中科院分区：
文献类型：
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作者：
A. R. Ometto;W. Roma
对巴西燃料乙醇生命周期与甘蔗热电联产相结合的大气排放进行了评估。燃料乙醇生命周期产生的最定量相关大气排放物质的总火能损失为3.26E+05kJ/t的C2H5OH。与1t乙醇的化学用能（计算为34.56E+06kJ）相比，全生命周期大气排放损失的用能占产品用能的1.11%。对大气排放的化学能量损失贡献最大的活动是通过燃烧释放的甲烷来收获甘蔗。改善环境质量和提高燃料乙醇热电联产的生命周期效率的建议是：收割甘蔗不燃烧，拖拉机、卡车和公共汽车应使用可再生燃料代替化石燃料，产品和投入的运输应优化物流。
An assessment is made of the atmospheric emissions from the life cycle of fuel ethanol coupled with the cogeneration of electricity from sugarcane in Brazil. The total exergy loss from the most quantitative relevant atmospheric emission substances produced by the life cycle of fuel ethanol is 3.26E+05kJ/t of C2H5OH. Compared with the chemical exergy of 1t of ethanol (calculated as 34.56E+06kJ), the exergy loss from the life cycle's atmospheric emission represents 1.11% of the product's exergy. The activity that most contributes to atmospheric emission chemical exergy losses is the harvesting of sugarcane through the methane emitted in burning. Suggestions for improved environmental quality and greater efficiency of the life cycle of fuel ethanol with cogenerated energy are: harvesting the sugarcane without burning, renewable fuels should be used in tractors, trucks and buses instead of fossil fuel and the transportation of products and input should be logistically optimized.