Critical issues for the deployment of plastic waste pyrolysis

Giglio, Emanuele; Marino, Alessia; Pizarro, Patricia; Escola, J.M.; Migliori, Massimo; Giordano, G.; Serrano, David

doi:10.1039/d3cy00445g

Cited by 4 publications

(2 citation statements)

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“…Techno-economic assessments demonstrate the economic viability of producing commercial fuel from waste plastic pyrolysis. , High yield and quality of oils are usually associated with a higher income. However, impurities and contaminants pose challenges in industrial-scale applications. , Dehalogenation, in particular, is one of the major issues in large-scale pyrolysis plants. Recently, a Cl circulation system has been developed for Cl recovery from PVC waste .…”

Section: Challenges and Perspectivesmentioning

confidence: 99%

“…Chemical recycling via pyrolysis is the most versatile and robust approach to combat plastic waste, which could convert plastic waste into high-quality monomer subunits, upcycle valuable byproducts, and mitigate environmental impacts. , Pyrolysis shows promise as an economically feasible approach for plastic waste recycling, although many challenges remain for implementation at the industrial scale. , Dehalogenation is one of the major issues related to plastic waste pyrolysis for fuel production. − Efforts are being devoted to addressing the knowledge gaps in the pyrolysis of halogen-containing plastics to pave the way for industrial-scale implementation. Over the decades, many achievements have been made in the chemical recycling of waste halogen-plastics.…”

Section: Introductionmentioning

confidence: 99%

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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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