Integrated torrefaction-extrusion system for solid fuel pellet production from mixed fiber-plastic wastes: Techno-economic analysis and life cycle assessment
Integrated torrefaction-extrusion system for solid fuel pellet production from mixed fiber-plastic wastes: Techno-economic analysis and life cycle assessment
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DOI：
10.1016/j.fuproc.2021.107094
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发表时间：
2022-02
影响因子：
7.5
通讯作者：
S. Kolapkar;S. Zinchik;Pralhad Burli;Yingqian Lin;Damon S. Hartley;J. Klinger;R. Handler;E. Bar-Ziv-E.
中科院分区：
文献类型：
--
作者：
S. Kolapkar;S. Zinchik;Pralhad Burli;Yingqian Lin;Damon S. Hartley;J. Klinger;R. Handler;E. Bar-Ziv-E.
世界正在见证纤维塑料废物的前所未有的产生和积累，由于不一致性，废物流异质性，输送问题，自热和造粒困难而导致各种挑战。这项研究提出了一种新的中试规模的系统，该系统集成了烘焙和挤出，将混合纤维塑料废物转化为燃料颗粒。生产的球团具有低成本、高热值、更好的均匀性和低环境影响。它们可以用作固体燃料或用作热解和气化的原料。为了评估颗粒成本及其环境影响，我们进行了技术经济分析（TEA）和生命周期评估（LCA）。TEA将烘焙-挤出项目的研究成果与技术经济模型相结合，并估算造粒和烘焙的成本、能耗和物料平衡。分析表明，生产均匀颗粒的基准成本约为55.28美元/干吨（2020年美元）。生命周期评估结果表明，焙烧产品具有摇篮到门体现的温室气体排放量为净负值，虽然它们高于可比的森林衍生的木片产品。焙烧产物的化石能量需求低于森林来源的碎片，表明焙烧产物具有用作未来加工的环境有益原料的强大潜力。
The world is witnessing an unprecedented generation and accumulation of fiber-plastic wastes resulting in various challenges due to inconsistency, waste-stream heterogeneity, conveying issues, self-heating, and difficulty in pelletization. This study presents a novel pilot-scale system that integrates torrefaction and extrusion to convert mix fiber-plastic waste into fuel pellets. The produced pellets have low cost, high heating value, better uniformity, and low environmental impact. They can be used as solid fuels or as feedstock for pyrolysis and gasification. To evaluate the pellet cost and its environmental impact, we performed Techno-Economic Analysis (TEA) and Life Cycle Assessment (LCA). The TEA integrates research findings from the torrefaction-extrusion project with the techno-economic models and estimates the costs, energy consumption, and mass balances for pelletizing and torrefaction. The analysis indicates that the baseline cost of producing uniform pellets is about $55.28/dry tonne (2020$). LCA results indicate that the torrefied product has cradle-to-gate embodied greenhouse gas emissions that are net negative, although they are higher than a comparable forest-derived woodchip product. Fossil energy demand for the torrefied product is lower than the forest-derived chip, indicating the torrefied product has strong potential for use as an environmentally beneficial feedstock for future processing.