Environmental impacts of technology learning curve for cellulosic ethanol in Brazil

被引:25
作者
Cavalett, Otavio [1 ]
Chagas, Mateus F. [1 ,2 ]
Junqueira, Tassia L. [1 ]
Watanabe, Marcos D. B. [1 ]
Bonomi, Antonio [1 ,2 ]
机构
[1] Ctr Nacl Pesquisa Energia & Mat, Lab Nacl Ciencia & Tecnol Bioetanol CTBE, Campinas, SP, Brazil
[2] Univ Estadual Campinas UNICAMP, Fac Engn Quim, Campinas, SP, Brazil
基金
巴西圣保罗研究基金会;
关键词
Second-generation ethanol; Life cycle assessment; Biofuel; Learning curve; LIFE-CYCLE ASSESSMENT; 2ND-GENERATION ETHANOL; ALLOCATION CHOICES; SUGARCANE; EMISSIONS; BIOMASS; LCA;
D O I
10.1016/j.indcrop.2016.11.025
中图分类号
S2 [农业工程];
学科分类号
0828 ;
摘要
This study presents a Life Cycle Assessment of second-generation ethanol production in Brazil considering current and future technologies to represent its technology evolution, compared to the first-generation process. With the start of the learning curve of the cellulosic ethanol production, improvements are expected on both biomass industrial conversion and agricultural production phases. Increased sugarcane yields and gradual introduction of more productive varieties, such as energy cane, are expected, affecting both first- and second-generation ethanol production processes. In environmental impact categories very relevant in the biofuel production debate, such as climate change, fossil depletion and agricultural land occupation, scenarios with second-generation process present lower impacts than first-generation process for the same time horizon. There is a trend of reduction of environmental impacts over time, reflecting the environmental advantages due to advances on the learning curve of second-generation ethanol technology and on biomass production system. The contribution of second-generation ethanol production will be extremely relevant to help Brazil to meet its targets in the international environmental agreements. (c) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码:31 / 39
页数:9
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