Dechlorination during pyrolysis of plastics: The potential of stepwise pyrolysis in combination with metal sorbents

Hubáček, Jan; Lederer, Jaromír; Kuráň, Pavel; Koutník, Petr; Gholami, Zahra; Zbuzek, Michal; Bačiak, Miroslav

doi:10.1016/j.fuproc.2022.107226

Cited by 30 publications

(11 citation statements)

References 59 publications

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“…Given the unique degradation characteristics of PVC, the stepwise pyrolysis of plastic mixtures with different catalysts has been explored . Results reveal that the in situ catalytic pyrolysis is not suitable for capturing Cl due to the evaporation of formed metal chlorides at high temperatures, resulting in increased Cl content in liquid.…”

Section: Recent Advancements In Thermochemical Treatmentsmentioning

confidence: 99%

Recent Advancements in Pyrolysis of Halogen-Containing Plastics for Resource Recovery and Halogen Upcycling: A State-of-the-Art Review

Ma,

Kumagai,

Saito

et al. 2024

Environ. Sci. Technol.

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Plastic waste has emerged as a serious issue due to its impact on environmental degradation and resource scarcity. Plastic recycling, especially of halogen-containing plastics, presents challenges due to potential secondary pollution and lower-value implementations. Chemical recycling via pyrolysis is the most versatile and robust approach for combating plastic waste. In this Review, we present recent advancements in halogen-plastic pyrolysis for resource utilization and the potential pathways from "reducing to recycling to upcycling" halogens. We emphasize the advanced management of halogen-plastics through copyrolysis with solid wastes (waste polymers, biomass, coal, etc.), which is an efficient method for dealing with mixed wastes to obtain high-value products while reducing undesirable substances. Innovations in catalyst design and reaction configurations for catalytic pyrolysis are comprehensively evaluated. In particular, a tandem catalysis system is a promising route for halogen removal and selective conversion of targeted products. Furthermore, we propose novel insights regarding the utilization and upcycling of halogens from halogen-plastics. This includes the preparation of halogen-based sorbents for elemental mercury removal, the halogenation−vaporization process for metal recovery, and the development of halogendoped functional materials for new materials and energy applications. The reutilization of halogens facilitates the upcycling of halogen-plastics, but many efforts are needed for mutually beneficial outcomes. Overall, future investigations in the development of copyrolysis and catalyst-driven technologies for upcycling halogen-plastics are highlighted.

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Section: Recent Advancements In Thermochemical Treatmentsmentioning

confidence: 99%

Recent Advancements in Pyrolysis of Halogen-Containing Plastics for Resource Recovery and Halogen Upcycling: A State-of-the-Art Review

Ma,

Kumagai,

Saito

et al. 2024

Environ. Sci. Technol.

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“…The authors showed that thermal treatment at 350 °C, followed by the use of Fe 3 O 4 as a sorbent in an ex situ configuration, allowed the chlorine content in the liquid fraction to be drastically reduced. 103…”

Section: Catalysis Science and Technology Mini Reviewmentioning

confidence: 99%

Critical issues for the deployment of plastic waste pyrolysis

Giglio

Marino

Pizarro

et al. 2023

Catal. Sci. Technol.

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“…These products are not treated as a waste material causing technical complications but as a full-value source of raw materials for further processes [ 30 ]. The issue of chlorine removal from PVC waste before its proper disposal is one of the main research topics of the thermal recycling of waste materials [ 30 , 87 , 88 , 89 , 90 , 91 , 92 , 93 , 94 , 95 , 96 ].…”

Section: Pvc Recyclingmentioning

confidence: 99%

A Brief Review of Poly(Vinyl Chloride) (PVC) Recycling

Lewandowski

Skórczewska

2022

Polymers

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Bearing in mind the aspiration of the world economy to create as complete a closed loop of raw materials and energy as possible, it is important to know the individual links in such a system and to systematise the knowledge. Polymer materials, especially poly(vinyl chloride) (PVC), are considered harmful to the environment by a large part of society. The work presents a literature review on mechanical and feedstock recycling. The advantages and disadvantages of various recycling methods and their development perspectives are presented. The general characteristics of PVC are also described. In conclusion, it is stated that there are currently high recycling possibilities for PVC material and that intensive work is underway on the development of feedstock recycling. Based on the literature review, it was found that PVC certainly meets the requirements for materials involved in the circular economy.

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Dechlorination during pyrolysis of plastics: The potential of stepwise pyrolysis in combination with metal sorbents

Cited by 30 publications

References 59 publications

Recent Advancements in Pyrolysis of Halogen-Containing Plastics for Resource Recovery and Halogen Upcycling: A State-of-the-Art Review

Recent Advancements in Pyrolysis of Halogen-Containing Plastics for Resource Recovery and Halogen Upcycling: A State-of-the-Art Review

Critical issues for the deployment of plastic waste pyrolysis

A Brief Review of Poly(Vinyl Chloride) (PVC) Recycling

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