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用于从报废光伏组件中回收高纯度硅的环保预处理工艺的开发。

Development of eco-friendly pretreatment processes for high-purity silicon recovery from end-of-life photovoltaic modules.

作者信息

Kim Suhwan, Kim Junkee, Cho Seyeon, Seo Kwangmin, Park Byoung-Uk, Lee Hae-Seok, Park Jongsung

机构信息

Department of Energy Engineering, Future Convergence Technology Research Institute, Gyeongsang National University Jinju Gyeongsangnam-do 52828 Republic of Korea

WonKwang S&T Co., Ltd Incheon 22845 Republic of Korea.

出版信息

RSC Adv. 2024 Oct 3;14(43):31451-31460. doi: 10.1039/d4ra04878d. eCollection 2024 Oct 1.

DOI:10.1039/d4ra04878d
PMID:39363994
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11448759/
Abstract

This study examines the efficacy of photovoltaic (PV) recycling processes and technologies for the recovery of high-purity silicon powder from waste solar modules. In order to facilitate the simplification of complex processes, such as the conventional nitric acid dissolution, solvent and ultrasonic irradiation, and solvent dissolution, a variety of mechanical separation processes have been established. These processes are designed to enhance the efficiency and effectiveness of the aforementioned processes. And a novel method for separating EVA from recycled Si powder was devised, which studied the WGS process using aqueous solutions of HO, HNO, and NaCl with different specific gravities. The WGS process using NaCl solution demonstrated superior performance, removing over 94% of the EVA, requiring less energy input and producing 73% less CO emissions compared to the thermal process. These technologies facilitate the transition towards a circular economy and bolster the implementation of carbon-neutral initiatives.

摘要

本研究考察了光伏（PV）回收工艺和技术从废弃太阳能组件中回收高纯度硅粉的效果。为了便于简化复杂工艺，如传统的硝酸溶解、溶剂与超声辐照以及溶剂溶解，已建立了多种机械分离工艺。这些工艺旨在提高上述工艺的效率和有效性。并且设计了一种从回收的硅粉中分离EVA的新方法，该方法研究了使用不同比重的HO、HNO和NaCl水溶液的WGS工艺。使用NaCl溶液的WGS工艺表现出卓越性能，与热工艺相比，去除了超过94%的EVA，所需能量输入更少，二氧化碳排放量减少73%。这些技术有助于向循环经济转型，并推动碳中和倡议的实施。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3630/11448759/42c802f90c4e/d4ra04878d-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3630/11448759/f59fded74294/d4ra04878d-f1.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3630/11448759/af8b179872f1/d4ra04878d-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3630/11448759/b2d1805ae6b5/d4ra04878d-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3630/11448759/2f165f4f673a/d4ra04878d-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3630/11448759/c99707e44892/d4ra04878d-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3630/11448759/42c802f90c4e/d4ra04878d-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3630/11448759/f59fded74294/d4ra04878d-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3630/11448759/4740bb7548fb/d4ra04878d-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3630/11448759/af8b179872f1/d4ra04878d-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3630/11448759/b2d1805ae6b5/d4ra04878d-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3630/11448759/2f165f4f673a/d4ra04878d-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3630/11448759/c99707e44892/d4ra04878d-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3630/11448759/42c802f90c4e/d4ra04878d-f7.jpg

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本文引用的文献

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Pyrolysis-based separation mechanism for waste crystalline silicon photovoltaic modules by a two-stage heating treatment.基于热解的两阶段热处理法对废弃晶体硅光伏组件的分离机制
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Silicon photovoltaic modules at end-of-life: Removal of polymeric layers and separation of materials.
硅光伏组件在使用寿命结束时：去除聚合物层和材料分离。
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