Thermochemical recycling of end-of-life photovoltaic laminates using pyrolysis: Interaction mechanisms and fluorine migration and transformation

IF 11.2 1区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Resources Conservation and Recycling Pub Date : 2025-04-15 DOI:10.1016/j.resconrec.2025.108312

Yuanzhong Zhang , Jing Gu , Benteng Wu , Jianwei Wang , Haoran Yuan

{"title":"Thermochemical recycling of end-of-life photovoltaic laminates using pyrolysis: Interaction mechanisms and fluorine migration and transformation","authors":"Yuanzhong Zhang , Jing Gu , Benteng Wu , Jianwei Wang , Haoran Yuan","doi":"10.1016/j.resconrec.2025.108312","DOIUrl":null,"url":null,"abstract":"<div><div>Pyrolysis is an effective method for recycling significant amounts of end-of-life photovoltaic laminates by removing organic components such as ethylene-vinyl acetate (EVA) and fluorinated backsheet (TPT). This study systematically studied the interaction mechanisms of EVA and TPT during co-pyrolysis, focusing on fluorine migration and transformation. Compared with the individual pyrolysis, co-pyrolysis exhibited an inhibitory effect, evidenced by the increased activation energy and reduced comprehensive pyrolysis index. Product evolution analysis revealed that TPT defluorination primarily occurred in the form of HF, with complete defluorination achieved under optimized conditions. During co-pyrolysis, EVA deacetylation reduced the defluorination temperature by 90 °C and increased HF yields by 32.3 % compared with TPT pyrolysis alone. Furthermore, TPT pyrolysis at 500 °C only produced phenyl-fluorinated compounds, while co-pyrolysis reduced their proportions to 58.8 %, leaving linear structures. These findings provide valuable insights into developing efficient and environmentally friendly strategies for thermochemical recycling and pollutant management of photovoltaic laminates.</div></div>","PeriodicalId":21153,"journal":{"name":"Resources Conservation and Recycling","volume":"219 ","pages":"Article 108312"},"PeriodicalIF":11.2000,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Resources Conservation and Recycling","FirstCategoryId":"93","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0921344925001910","RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, ENVIRONMENTAL","Score":null,"Total":0}

引用次数: 0

Abstract

Pyrolysis is an effective method for recycling significant amounts of end-of-life photovoltaic laminates by removing organic components such as ethylene-vinyl acetate (EVA) and fluorinated backsheet (TPT). This study systematically studied the interaction mechanisms of EVA and TPT during co-pyrolysis, focusing on fluorine migration and transformation. Compared with the individual pyrolysis, co-pyrolysis exhibited an inhibitory effect, evidenced by the increased activation energy and reduced comprehensive pyrolysis index. Product evolution analysis revealed that TPT defluorination primarily occurred in the form of HF, with complete defluorination achieved under optimized conditions. During co-pyrolysis, EVA deacetylation reduced the defluorination temperature by 90 °C and increased HF yields by 32.3 % compared with TPT pyrolysis alone. Furthermore, TPT pyrolysis at 500 °C only produced phenyl-fluorinated compounds, while co-pyrolysis reduced their proportions to 58.8 %, leaving linear structures. These findings provide valuable insights into developing efficient and environmentally friendly strategies for thermochemical recycling and pollutant management of photovoltaic laminates.

Abstract Image

查看原文本刊更多论文

利用热解法热化学回收报废光伏层压板：相互作用机制和氟迁移转化

热解是回收大量报废光伏层压板的有效方法，通过去除有机成分，如乙烯-醋酸乙烯（EVA）和氟化背板（TPT）。本研究系统地研究了EVA和TPT在共热解过程中的相互作用机理，重点研究了氟的迁移转化。与单独热解相比，共热解表现出抑制作用，表现为活化能增加，综合热解指数降低。产物演化分析表明，TPT脱氟主要以HF形式发生，在优化条件下实现了完全脱氟。在共热解过程中，与单独的TPT热解相比，EVA脱乙酰使脱氟温度降低了90℃，HF产率提高了32.3%。此外，在500℃下，TPT热解只产生了苯基氟化化合物，而共热解将其比例降低到58.8%，留下线性结构。这些发现为开发高效环保的光伏层压板热化学回收和污染物管理策略提供了有价值的见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Resources Conservation and Recycling 环境科学-工程：环境

CiteScore

22.90

自引率

6.10%

发文量

625

审稿时长

23 days

期刊介绍： The journal Resources, Conservation & Recycling welcomes contributions from research, which consider sustainable management and conservation of resources. The journal prioritizes understanding the transformation processes crucial for transitioning toward more sustainable production and consumption systems. It highlights technological, economic, institutional, and policy aspects related to specific resource management practices such as conservation, recycling, and resource substitution, as well as broader strategies like improving resource productivity and restructuring production and consumption patterns. Contributions may address regional, national, or international scales and can range from individual resources or technologies to entire sectors or systems. Authors are encouraged to explore scientific and methodological issues alongside practical, environmental, and economic implications. However, manuscripts focusing solely on laboratory experiments without discussing their broader implications will not be considered for publication in the journal.