摘要
碳达峰、碳中和时代背景决定低碳化利用是废弃塑料处理行业的主要发展趋势。热解可以将废弃塑料中的碳氢化合物转化为高附加值的含碳产物,避免废弃物焚烧、填埋造成的温室气体排放,同时实现高值化利用,助力于构建绿色低碳循环发展工业体系。本文以先进的废弃塑料热解技术为对象,对其生命周期碳足迹研究进展进行了综述。首先从碳元素迁移转化的视角介绍了废弃塑料的原料特性和热解产物特性,进一步从碳元素生命周期视角总结了目前国内外废弃塑料制备固体碳产物的热解固碳思路,接着介绍了废弃塑料热解系统生命周期碳足迹研究方法和步骤,阐述了其碳足迹评价指标及内涵,进而围绕不同废弃塑料热解技术,从系统固碳角度归纳并综述了废弃塑料热解系统生命周期碳足迹研究现状,重点论述了不同研究因系统边界和数据来源不一致导致其碳足迹结果难以进行比较等问题,指出目前废弃塑料热解系统生命周期碳足迹研究需要通过构建多尺度模型,深入探究不同尺度数据之间的相互关系,增加数据透明度,清晰描述不同尺度的计算结果,从而使得研究结果可对比并具有广泛的参考价值,最后根据以上研究对废弃塑料生命周期研究的未来发展方向进行展望,为后续废弃塑料热解产业相关发展提供理论参考。
In the context of carbon peak and carbon neutrality,low-carbon utilization is the main development trend of the waste plastic processing industry.Pyrolysis can convert hydrocarbons in waste plastics into high-value-added carbon-containing products,avoid greenhouse gas emissions caused by waste incineration and landfill,and realize high-value utilization,helping to build a green and low-carbon recycling industrial system.Based on advanced pyrolysis technologies,this paper reviews the progress of research on the life cycle carbon footprint of waste plastics.Firstly,this paper introduces the characteristics of waste plastic raw materials and pyrolysis products from the perspective of carbon transfer and transformation,and then summarizes the current domestic and international pyrolysis carbon sequestration ideas for the preparation of solid carbon products from waste plastics from the perspective of carbon life cycle.By introducing the methodology and steps of the life cycle carbon footprint of the waste plastic pyrolysis system,expounding on the carbon footprint assessment index and connotation.The research status of the life cycle carbon footprint of the waste plastic pyrolysis system is summarized and reviewed from the perspective of carbon sequestration by different waste plastic pyrolysis technologies,focusing on the difficulty in comparing the carbon footprint results of different studies due to inconsistent system boundaries and data sources,and emphasizing that the current life cycle carbon footprint research of the waste plastic pyrolysis system needs to build a multi-scale model,deeply explore the interrelationship between different scale data,increase data transparency,and clearly describe the calculation results of different scales,so that the research results can be compared and have extensive reference value.Finally,we put forward the development prospects of the life cycle of waste plastics,in order to provide a theoretical reference for the future development of the waste plastic pyrolysis industry.
作者
周荷雯
姚敦雪
杨晴
ZHOU Hewen;YAO Dunxue;YANG Qing(School of Energy and Power Engineering,Huazhong University of Science and Technology,Wuhan 430074,China;Institute of Advanced Technology,Shandong University,Jinan 250199,China)
出处
《材料导报》
EI
CAS
CSCD
北大核心
2024年第14期239-246,共8页
Materials Reports
基金
国家重点研发计划(2022YFC3902405)。
关键词
废弃塑料
热解
碳足迹
生命周期评价
waste plastic
pyrolysis
carbon footprint
life cycle assessment
