期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 9, 期 22, 页码 7403-7421出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.0c08622
关键词
Plastic waste supply chain; Circular economy; Linear program optimization; Mechanical recycling; Materials recovery facility; Chemical recycling; Material flow optimization; Systems analysis
资金
- REMADE Institute
- U.S. Department of Energy's Office of Energy Efficiency and Renewable Energy (EERE) under the Advanced Manufacturing Office [DE-EE0007897]
This article aims to assess the environmental, social, and economic impacts of plastic waste supply chains in a circular economy. The study indicates that both chemical and mechanical recycling processes are essential to achieve a true circular economy of PET bottles. Good quality and standardized life cycle assessment and techno-economic analysis studies are necessary to understand the impacts of advanced sorting and chemical recycling technologies.
The environmental and economic impacts of implementing a circular economy in plastic waste supply chains are not well understood. The proposed systems analysis framework assesses environmental, social, and economic impacts of plastic waste supply chains in a circular economy. The first objective of this article is to identify data sets, models, and knowledge gaps associated with waste plastic supply chain processes, mainly in the U.S. Our literature review indicated that the best data sets exist for virgin plastic resin production, mechanical recycling, landfilling, and incineration, with the materials recovery facility being intermediate, and with chemical recycling the lowest. The second objective of this perspective is to develop an illustrative application of the framework by conducting a preliminary systems analysis of PET bottles with closed-loop recycling. The preliminary systems analysis of polyethylene terephthalate (PET) bottles utilized a linear programming optimization method. Our optimization model indicated that both chemical and mechanical recycling processes are needed to achieve a true circular economy of PET bottles with the least greenhouse gas emissions, specifically reductions of 24% when compared with the linear economy. Good quality and standardized life cycle assessment and techno-economic analysis studies are needed to better understand the environmental, economic, and social impacts of advanced sorting and chemical recycling technologies.
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