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Pyrolysis Characteristics and Non-Isothermal Kinetics of Integrated Circuits
Due to the complexity of components and high hazard of emissions, thermochemical conversions of plastics among waste-integrated circuits (ICs) are more favorable compared with the common treatment options of electronic waste (E-waste), such as chemical treatment and burning. In this study, the waste...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9267151/ https://www.ncbi.nlm.nih.gov/pubmed/35806585 http://dx.doi.org/10.3390/ma15134460 |
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author | Chen, Ziwei Liu, Linhao Wang, Hao Liu, Lili Wang, Xidong |
author_facet | Chen, Ziwei Liu, Linhao Wang, Hao Liu, Lili Wang, Xidong |
author_sort | Chen, Ziwei |
collection | PubMed |
description | Due to the complexity of components and high hazard of emissions, thermochemical conversions of plastics among waste-integrated circuits (ICs) are more favorable compared with the common treatment options of electronic waste (E-waste), such as chemical treatment and burning. In this study, the waste random-access memory, as the representative IC, was used to investigate the thermal degradation behaviors of this type of E-waste, including a quantitative analysis of pyrolysis characteristics and non-isothermal kinetics. The results show that the pyrolysis of the ICs can be divided into three different decomposition stages. The pyrolysis temperature and gas atmosphere play an important role in the pyrolysis reaction, and the heating rate greatly affects the rate of the pyrolysis reaction. The non-isothermal kinetic parameters and reaction mechanisms of ICs are determined using the Friedman method, Coats and Redfern (CR) method, and Kissinger method. The results show that the actual average activation energy of the pyrolysis reaction of ICs should be between 170 and 200 kJ·mol(−1). The optimally fitting model for the ICs pyrolysis is the three-step parallel model consisting of the random nucleation model (A(m)) and reaction order model (C(n)). |
format | Online Article Text |
id | pubmed-9267151 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-92671512022-07-09 Pyrolysis Characteristics and Non-Isothermal Kinetics of Integrated Circuits Chen, Ziwei Liu, Linhao Wang, Hao Liu, Lili Wang, Xidong Materials (Basel) Article Due to the complexity of components and high hazard of emissions, thermochemical conversions of plastics among waste-integrated circuits (ICs) are more favorable compared with the common treatment options of electronic waste (E-waste), such as chemical treatment and burning. In this study, the waste random-access memory, as the representative IC, was used to investigate the thermal degradation behaviors of this type of E-waste, including a quantitative analysis of pyrolysis characteristics and non-isothermal kinetics. The results show that the pyrolysis of the ICs can be divided into three different decomposition stages. The pyrolysis temperature and gas atmosphere play an important role in the pyrolysis reaction, and the heating rate greatly affects the rate of the pyrolysis reaction. The non-isothermal kinetic parameters and reaction mechanisms of ICs are determined using the Friedman method, Coats and Redfern (CR) method, and Kissinger method. The results show that the actual average activation energy of the pyrolysis reaction of ICs should be between 170 and 200 kJ·mol(−1). The optimally fitting model for the ICs pyrolysis is the three-step parallel model consisting of the random nucleation model (A(m)) and reaction order model (C(n)). MDPI 2022-06-24 /pmc/articles/PMC9267151/ /pubmed/35806585 http://dx.doi.org/10.3390/ma15134460 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Chen, Ziwei Liu, Linhao Wang, Hao Liu, Lili Wang, Xidong Pyrolysis Characteristics and Non-Isothermal Kinetics of Integrated Circuits |
title | Pyrolysis Characteristics and Non-Isothermal Kinetics of Integrated Circuits |
title_full | Pyrolysis Characteristics and Non-Isothermal Kinetics of Integrated Circuits |
title_fullStr | Pyrolysis Characteristics and Non-Isothermal Kinetics of Integrated Circuits |
title_full_unstemmed | Pyrolysis Characteristics and Non-Isothermal Kinetics of Integrated Circuits |
title_short | Pyrolysis Characteristics and Non-Isothermal Kinetics of Integrated Circuits |
title_sort | pyrolysis characteristics and non-isothermal kinetics of integrated circuits |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9267151/ https://www.ncbi.nlm.nih.gov/pubmed/35806585 http://dx.doi.org/10.3390/ma15134460 |
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