Recovery of copper from PVC multiwire cable waste by steam gasification

Zabłocka-Malicka, Monika; Rutkowski, Piotr; Szczepaniak, W.

doi:10.1016/j.wasman.2015.08.001

Cited by 36 publications

(17 citation statements)

References 17 publications

(20 reference statements)

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“…(Moulay, 2010;Sabaa et al, 2009;Zhu et al, 2016). PVC is the most common thermoplastic used as insulation in electric wires (Morsy et al, 2003), due to its easy processing, good insulation capacity, high chemical resistance and low flammability (Akovali, 2012;Zabłocka-Malicka et al, 2015). PVC products have long useful life in comparison with other plastic materials.…”

Section: Introductionmentioning

confidence: 99%

Dechlorination of polyvinyl chloride electric wires by hydrothermal treatment using K2CO3 in subcritical water

et al. 2020

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Polyvinyl chloride (PVC) waste generation has significantly increased in recent years and their disposal is considered a major environmental concern. Removal techniques of chlorine from PVC waste are being studied to minimize a negative environmental impact. In this work, the use of K2CO3 as an alkaline additive to improve the dechlorination efficiency (DE) in the hydrothermal degradation of PVC wires was studied. Different experiments were carried out varying both temperature (175 ºC, 200 ºC, 225 ºC, 235 ºC and 250 ºC) and K2CO3 concentration (0.025 M, 0.050 M and 0.125 M), using a solid/liquid ratio of 1:5 in order to determine the evolution of the dechlorination efficiency with time. About 4.66, 21.1, 24.4, 45.7 and 92.6 wt. % of chlorine in PVC wire was removed during hydrothermal dechlorination (HTD) with an additive/chlorine ratio of 1:25 (K2CO3 solution of 0.050 M) at 175, 200, 225, 235 and 250 ºC, respectively. Optimal additive/chlorine ratio decreased to 1:50 (K2CO3 solution of 0.025 M) at 250 ºC, obtaining a dechlorination degree of 99.1% after 4 hours without the need of metallic catalysts. Concerning the solid phase behavior during dechlorination, a linear correlation between the DE reached and the weight loss of PVC was found including every experiment performed in this work.

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Section: Introductionmentioning

confidence: 99%

Dechlorination of polyvinyl chloride electric wires by hydrothermal treatment using K2CO3 in subcritical water

et al. 2020

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“…The experiment of gasification was performed with commercial, copper multiwire cable, typical for data transfer (Fig. 4) [6]. Mass of the sample was equal to 63.5 g, including copper cords (25.4%), tinned copper braids (28.7%), PVC insulations (43.2%, including polyvinyl chloride, plasticizer and calcium carbonate as filler), polyester foil (1.57%) and cotton cords (1.19%).…”

Section: Cu Multiwire Pvc Cablementioning

confidence: 99%

“…Non-metal phase in ⅔ was the calcium chloride. The content of CHONS in the cable, necessary for equilibrium calculations, was estimated on the basis of the cable composition given in [6]. For simplicity, NS was not considered due to negligible amount of cotton, hence CHO concentrations were equal to 19.15% for C, 2.42% for H and 2.88% for O.…”

Section: Cu Multiwire Pvc Cablementioning

confidence: 99%

“…HHV of the gas was equal 11.6 MJ/m 3 . Accumulation and concentrations of nonvolatile hydrocarbons were analyzed in deposits in the reactor outlet (0.6%), Liebig condenser (2.1%) and in the aqueous condensate (97.3%) [6]. The compounds were dominated by polycyclic aromatic hydrocarbons, especially naphthalene (66%), phenanthrene (8%), and acenaphthylene (5%).…”

Section: Cu Multiwire Pvc Cablementioning

confidence: 99%

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Steam gasification for waste valorization with energy recovery

2018

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Steam gasification seems a promising technology of waste transformation since the steam is the only oxidizing reagent in the process and gaseous carrier of volatiles. Gasses are equilibrated at high temperature for conversion to the H2-rich syngas. After this step, the excess of steam condenses during cooling, together with non-converted tars, oils and fine particles. Condensing steam efficiently absorbs hydrogen bromide and hydrogen chloride. The use of steam eliminates carbonaceous residue from the solid mineral/metal product, which is convenient for further processing (for example extraction of metals). The syngas and the solid residue are generally the only products of gasification, because aqueous condensate may be returned to the process together with non-volatile hydrocarbons and sediments. The process was illustrated by laboratory scale gasification experiments with a) carton packaging, b) abrasive disc, c) pork bones, d) Cu multiwire cable e) PC/AT card and f) inverter (PCB board). The mineral/metal products of gasification may be considered as a raw materials for further processing, including typical routes of metals recovery. There is no direct emission to the atmosphere from the process. However, providing the energy from the syngas back to the reactor as well as the energy balance of steam condensation and recirculation of condensate to the reactor need careful analysis.

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“…As a result, after winding, there remains an immeasurable length of the conductor, which should go to remelting. Remelting of copper waste is accompanied by the appearance of technogenic formations in the form of gases and dusts [1].…”

Section: Introductionmentioning

confidence: 99%

Recycling Option of the Wrong Length Copper Wire

Загиров¹,

Loginov²,

Ivanov³

2017

Kms

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The purpose of the study is to study the possibility of utilizing copper waste from drawing. The experimental testing was carried out with reference to the compacting of segments of copper wire to produce products in the form of bars. The finite element method was used to evaluate the stress-strain state when the raw material compression scheme in the container was realized. It is shown that with the tested treatment modes a high level of strength properties is achieved, but an insufficient level of plastic characteristics.

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Recovery of copper from PVC multiwire cable waste by steam gasification

Cited by 36 publications

References 17 publications

Dechlorination of polyvinyl chloride electric wires by hydrothermal treatment using K2CO3 in subcritical water

Dechlorination of polyvinyl chloride electric wires by hydrothermal treatment using K2CO3 in subcritical water

Steam gasification for waste valorization with energy recovery

Recycling Option of the Wrong Length Copper Wire

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