光伏系统
生命周期评估
焚化
环境科学
晶体硅
环境影响评价
材料科学
工业生态学
工艺工程
废物管理
光伏
太阳能
硅
纳米技术
工程物理
太阳能电池
环境工程
过程(计算)
计算机科学
工程类
光电子学
持续性
生产(经济)
冶金
宏观经济学
经济
电气工程
操作系统
生态学
生物
作者
Cynthia Latunussa,Fulvio Ardente,Gian Andrea Blengini,Lucia Mancini
标识
DOI:10.1016/j.solmat.2016.03.020
摘要
Abstract Lifecycle impacts of photovoltaic (PV) plants have been largely explored in several studies. However, the end-of-life phase has been generally excluded or neglected from these analyses, mainly because of the low amount of panels that reached the disposal yet and the lack of data about their end of life. It is expected that the disposal of PV panels will become a relevant environmental issue in the next decades. This article illustrates and analyses an innovative process for the recycling of silicon PV panel. The process is based on a sequence of physical (mechanical and thermal) treatments followed by acid leaching and electrolysis. The Life Cycle Assessment methodology has been applied to account for the environmental impacts of the process. Environmental benefits (i.e. credits) due to the potential productions of secondary raw materials have been intentionally excluded, as the focus is on the recycling process. The article provides transparent and disaggregated information on the end-of-life stage of silicon PV panel, which could be useful for other LCA practitioners for future assessment of PV technologies. The study highlights that the impacts are concentrated on the incineration of the panel׳s encapsulation layers, followed by the treatments to recover silicon metal, silver, copper, aluminium. For example around 20% of the global warming potential impact is due to the incineration of the sandwich layer and 30% to the post-incineration treatments. Transport is also relevant for several impact categories, ranging from a minimum of about 10% (for the freshwater eutrophication) up to 80% (for the Abiotic Depletion Potential – minerals).
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