Incineration, pyrolysis and gasification of electronic waste

Gurgul, Agnieszka; Szczepaniak, W.; Zabłocka-Malicka, Monika

doi:10.1051/e3sconf/20172200060

Cited by 12 publications

(6 citation statements)

References 13 publications

(7 reference statements)

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“…This process leads to changes in the physical phase and chemical composition of the materials. In addition to metal products (slag), there is formation of gases, liquid products (oils) and carbon-rich solid residues called coke [14].…”

Section: Pyrometallurgymentioning

confidence: 99%

“…Copper (Cu) is the main metallic element present in the solid fraction. Refining and electrolysis allow its recovery, and precious metals are extracted from the anode sludge [14,15].…”

Section: Pyrometallurgymentioning

confidence: 99%

“…Also, pyrolysis significantly reduces the volume of residue produced at the end of the process [17]. Moreover, combined with mechanical methods, this process could increase the efficiency of e-waste recovery [14].…”

Section: Pyrometallurgymentioning

confidence: 99%

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Precious Metals Recovery Process from Electronic Boards: Case Study of a Non-Profit Organization (QC, Canada)

Blais,

Le Dinh,

Loranger

et al. 2024

Sustainability

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The growth in the consumption of electronic products in recent years has resulted in increasing electronic device waste. At the same time, there is a decrease in the availability of raw metals required to produce electronic boards. Recycling through the recovery of precious and critical metals contained in electronic board waste is a solution, but the processes need to be safer for the environment. This paper presents the steps that lead to investment in the development of an eco-friendly and cost-effective process for recovering precious metals from end-of-life electronic telecommunications cards. Social organizations can also become involved in the recycling of electronic cards, thus enabling the integration of marginalized people into society. We examine the case of a non-profit organization whose mission is to help people living with mental health problems through the recycling of end-of-life telecommunication devices. This recycling process must operate within constraints specific to this organization and to the employment of people with mental health issues. The literature review showed that considering ecological and economic factors, the hydrometallurgical process appeared to be a logical choice.

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Section: Pyrometallurgymentioning

confidence: 99%

“…Copper (Cu) is the main metallic element present in the solid fraction. Refining and electrolysis allow its recovery, and precious metals are extracted from the anode sludge [14,15].…”

Section: Pyrometallurgymentioning

confidence: 99%

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Precious Metals Recovery Process from Electronic Boards: Case Study of a Non-Profit Organization (QC, Canada)

Blais,

Le Dinh,

Loranger

et al. 2024

Sustainability

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“…While incineration releases toxic fumes into the environment, landfilling of e-waste can lead to leaching of potentially hazardous materials into the environment. 6 , 7 Recently, thermochemical techniques have grown remarkably as an efficient methodology for treating e-waste, particularly PCBs. Pyrolysis is one such technique that produces solid char, liquid tar, and gases as the final products from a particular polymer or organic feedstock.…”

Section: Introductionmentioning

confidence: 99%

“…Currently, most of the PCBs are either incinerated or landfilled. While incineration releases toxic fumes into the environment, landfilling of e-waste can lead to leaching of potentially hazardous materials into the environment. , Recently, thermochemical techniques have grown remarkably as an efficient methodology for treating e-waste, particularly PCBs. Pyrolysis is one such technique that produces solid char, liquid tar, and gases as the final products from a particular polymer or organic feedstock. − The advantage of pyrolysis of PCBs is that, if the temperature is high enough, it will melt the solder used for attaching the different components.…”

Section: Introductionmentioning

confidence: 99%

Distributed Activation Energy Modeling and Py-GC/MS Studies on Pyrolysis of Different Printed Circuit Boards for Resource Recovery

2022

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Printed circuit boards (PCBs) constitute an important segment of electronic waste that can be effectively utilized to recover valuable metals and organics. The present work is focused on the kinetics and product distribution from pyrolysis of three different PCB samples, viz., television PCB (TV PCB), motherboard PCB (MB PCB), and hard disk PCB (HD PCB). The PCBs were pretreated to eliminate most of the metallic constituents. Kinetic analysis was performed using Vyazovkin’s isoconversional method and distributed activation energy model (DAEM). The average apparent activation energies obtained from the Vyazovkin method were 207.2, 158.9, and 179.7 kJ mol –1 for the TV PCB, MB PCB, and HD PCB, respectively. The DAEM with five, four, and four pseudo-components was used to describe the decomposition kinetics of the TV PCB, MB PCB, and HD PCB, respectively. Importantly, two types of distributions, viz., Gaussian and Weibull, were utilized to effectively model the nonisothermal data obtained from thermogravimetric analysis at 10 and 20 °C min –1 . The evolution of pyrolysates belonging to functional groups such as phenolics, aromatics, aliphatics, halogenated compounds, N-containing compounds, and oxygenates was studied at two different temperatures (500 and 700 °C) using analytical pyrolysis–gas chromatograph/mass spectrometry (Py-GC/MS). The Py-GC/MS results demonstrated an increase in selectivity to aromatics and straight-chain aliphatics at 700 °C with a concomitant decrease in selectivity to phenols and oxygenates.

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