期刊
SCIENCE
卷 374, 期 6563, 页码 71-+出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.abg9853
关键词
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资金
- US Environmental Protection Agency [83557907]
- EU [720695]
- Bundesamt fur Energie SWEET PATHFNDR project
- Ministry of Economic Affairs, Innovation, Digitalization and Energy of the State of North Rhine Westphalia Sci4Climate project
Achieving net-zero emission plastics can be done by combining biomass and CO2 utilization with increased recycling rates, which can save a significant amount of energy. To realize the potential cost savings, it is important to lower production costs, incentivize large-scale recycling, and reduce investment barriers for technologies using renewable carbon feedstock.
Mitigating life-cycle greenhouse gas emissions of plastics is perceived as energy intensive and costly. We developed a bottom-up model that represents the life cycle of 90% of global plastics to examine pathways to net-zero emission plastics. Our results show that net-zero emission plastics can be achieved by combining biomass and carbon dioxide (CO2) utilization with an effective recycling rate of 70% while saving 34 to 53% of energy. Operational costs for net-zero emission plastics are in the same range as those for linear fossil-based production with carbon capture and storage and could even be substantially reduced. Realizing the full cost-saving potential of 288 billion US dollars requires low-cost supply of biomass and CO2, high-cost supply of oil, and incentivizing large-scale recycling and lowering investment barriers for all technologies that use renewable carbon feedstock.
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