Dechlorination Behavior on the Recovery of Useful Resources from WEEE by the Steam Gasification in the Molten Carbonates

Zhang, Shangzhong; Yang, Yu Li

doi:10.1016/j.proenv.2016.02.108

Cited by 14 publications

(9 citation statements)

References 17 publications

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“…On the other hand, gasification was mentioned as accepted technology of municipal solid waste processing [16]. Recently, there were presented laboratory experiments of printed circuit boards gasification in molten carbonates by steam [17][18][19]. There is also a paper reporting an experiment of processing of plastics from printed circuit board to hydrogen by pyrolysis and steam conversion [20].…”

Section: Gasification Of Electronic Wastementioning

confidence: 99%

Incineration, pyrolysis and gasification of electronic waste

2017

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Abstract. Three high temperature processes of the electronic waste processing: smelting/incineration, pyrolysis and gasification were shortly discussed. The most distinctive feature of electronic waste is complexity of components and their integration. This type of waste consists of polymeric materials and has high content of valuable metals that could be recovered. The purpose of thermal treatment of electronic waste is elimination of plastic components (especially epoxy resins) while leaving non-volatile mineral and metallic phases in more or less original forms. Additionally, the gaseous product of the process after cleaning may be used for energy recovery or as syngas.

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Section: Gasification Of Electronic Wastementioning

confidence: 99%

Incineration, pyrolysis and gasification of electronic waste

2017

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“…PVC-this polymer is one of the most important parts of WEEE plastics [61]. Additionally, it is widely used as a plastic materials in electronic products due to its excellent chemical properties and inexpensive price [62]. This polymer has an amorphous structure with polar chlorine atoms in the molecular structure.…”

Section: Introductionmentioning

confidence: 99%

“…PVC presents ideal characteristics such as chemical stability and physical properties which makes it ideal for several applications (such as large cooling appliances, CRT monitors, and copying equipment). Due to the high chlorine content (around 56% of the polymer's weight), the recycling of PVC is harder than the other WEEE plastics containing brominated flame retardant [10,62,63]. From all known recycling techniques, mechanical and chemical methods are acceptable.…”

Section: Introductionmentioning

confidence: 99%

Waste Electrical and Electronic Equipment: A Review on the Identification Methods for Polymeric Materials

et al. 2019

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Considering that the large quantity of waste electrical and electronic equipment plastics generated annually causes increasing environmental concerns for their recycling and also for preserving of raw material resources, decreasing of energy consumption, or saving the virgin materials used, the present challenge is considered to be the recovery of individual polymers from waste electrical and electronic equipment. This study aims to provide an update of the main identification methods of waste electrical and electronic equipment such as spectroscopic fingerprinting, thermal study, and sample techniques (like identification code and burning test), and the characteristic values in the case of the different analyses of the polymers commonly used in electrical and electronic equipment. Additionally, the quality of the identification is very important, as, depending on this, new materials with suitable properties can be obtained to be used in different industrial applications. The latest research in the field demonstrated that a complete characterization of individual WEEE (Waste Electric and Electronic Equipment) components is important to obtain information on the chemical and physical properties compared to the original polymers and their compounds. The future directions are heading towards reducing the costs by recycling single polymer plastic waste fractions that can replace virgin plastic at a ratio of almost 1:1.

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“…Halogens react with metals to produce a wide range of salts, including calcium fluoride, sodium chloride, silver bromide and potassium iodide. They have many industrial applications such as in electrical equipment and brominated flame retardants [1]. Halogenated wastes come from Laboratory wastes containing various hazardous chemical reagents and reactants.…”

Section: Introductionmentioning

confidence: 99%

Halogenated Wastes Safe Disposal: Polychlorinated biphenyls

Bani-Hani¹,

Assad²

2018

Int J Petrochem Res

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The aim of this work is to have a review of some products where halogens are used in the manufacturing process along with the safe disposal methods of its wastes. Different halogenated compounds are introduced. The theoretical results are validated by comparing them with experimental results. Results show that incineration is a safe disposal method of polychlorinated Biphenyls (PCBs). The incineration of PCBs in rotary kiln is shown based on theoretical and experimental studies. Where energy and material balances are applied to rotary kiln incineration to derive the theoretical model. The results from the theoretical model is validated against experimental results. The disposal method by incineration for other halogenated compounds is presented. Different models representing the combustion of other halogenated components are analyzed. It is shown that incineration is the safe disposal method for halogenated compounds at temperatures around 1200 K to avoid the formation of toxic gas emissions like furan and dioxin. The theoretical results are comparable with the experimental data of the incineration process.

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Dechlorination Behavior on the Recovery of Useful Resources from WEEE by the Steam Gasification in the Molten Carbonates

Cited by 14 publications

References 17 publications

Incineration, pyrolysis and gasification of electronic waste

Incineration, pyrolysis and gasification of electronic waste

Waste Electrical and Electronic Equipment: A Review on the Identification Methods for Polymeric Materials

Halogenated Wastes Safe Disposal: Polychlorinated biphenyls

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