Analysis of the pyrolysis processes, kinetics and products of end-of-life wind turbine blade base component blends (epoxy resin/glass fiber and thermoplastic polyurethane/carbon fiber)

IF 7 2区工程技术 Q1 ENERGY & FUELS

Sustainable Energy Technologies and Assessments Pub Date : 2025-10-03 DOI:10.1016/j.seta.2025.104619

Lichao Ge , Qingyuan Yang , Hongcui Feng , Xi Li , Weixuan Zhang , Yanquan Liu , Huiwen Liu , Yang Wang , Chang Xu

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引用次数: 0

Abstract

Wind turbine blade recycling is growing in scale annually, and pyrolysis is a good method for recycling. In this study, the pyrolysis behavior of two common physical powder blends of fiber-reinforced composites in wind turbine blades, epoxy resin/glass fiber (EP/GF) and thermoplastic polyurethane/carbon fiber (TPU/CF), was investigated via thermogravimetric analysis and kinetic analysis with different mixing ratios. The results demonstrated a certain synergistic effect between the fibers and the matrix, and an increase in the fiber proportion led to a greater increase in the pyrolysis activation energy of EP/GF (133.69‒188.94 kJ/mol) than that of TPU/CF (126.88‒141.35 kJ/mol). The isothermal pyrolysis products of these two blends were investigated via the tube furnace method; the pyrolysis gas products of the two blends were similar in type and mainly included carbon‒oxygen compounds, alkanes, olefins, and hydrogen. However, varying mixing ratios altered gas compositions and calorific values with EP/GF gases (13.86‒17.14 MJ/Nm³) peaked at 3:6; TPU/CF gases (6.99‒8.54 MJ/Nm³) peaked at 2:7. Scanning electron microscopy images of the pyrolyzed solid products demonstrated that the matrix on the recovered fibers of both blends was largely removed, and the increase in fiber proportion negatively affected the matrix removal of both blends.

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报废风电叶片基组分共混物（环氧树脂/玻璃纤维和热塑性聚氨酯/碳纤维）热解过程、动力学和产物分析

风电叶片回收规模逐年增长，热解是一种很好的回收方法。通过热重分析和动力学分析，研究了环氧树脂/玻璃纤维（EP/GF）和热塑性聚氨酯/碳纤维（TPU/CF）两种常见的纤维增强复合材料物理粉末共混物在风电叶片中的热解行为。结果表明，纤维与基体之间存在一定的协同作用，随着纤维比例的增加，EP/GF的热解活化能（133.69 ~ 188.94 kJ/mol）高于TPU/CF的热解活化能（126.88 ~ 141.35 kJ/mol）。采用管式炉法对两种共混物的等温热解产物进行了研究；两种共混物的热解气产物类型相似，主要包括碳氧化合物、烷烃、烯烃和氢。然而，不同的混合比例改变了EP/GF气体的气体成分和热值（13.86-17.14 MJ/Nm3），峰值为3:6；TPU/CF气体（6.99-8.54 MJ/Nm3）峰值为2:7。热解固体产物的扫描电镜图像表明，两种共混物的回收纤维上的基体都被大量去除，纤维比例的增加对两种共混物的基体去除有负面影响。

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来源期刊

Sustainable Energy Technologies and Assessments Energy-Renewable Energy, Sustainability and the Environment

CiteScore

12.70

自引率

12.50%

发文量

1091

期刊介绍： Encouraging a transition to a sustainable energy future is imperative for our world. Technologies that enable this shift in various sectors like transportation, heating, and power systems are of utmost importance. Sustainable Energy Technologies and Assessments welcomes papers focusing on a range of aspects and levels of technological advancements in energy generation and utilization. The aim is to reduce the negative environmental impact associated with energy production and consumption, spanning from laboratory experiments to real-world applications in the commercial sector.