Cited by 3,276Polymer crystallization and propertiesWaste Management and RecyclingRecycling and Waste Management Techniques

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Mechanical and chemical recycling of solid plastic waste

Ragaert, Kim, Delva, Laurens, Van Geem, Kevin·2017·Waste Management

DOI 10.1016/j.wasman.2017.07.044

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Abstract

This review presents a comprehensive description of the current pathways for recycling of polymers, via both mechanical and chemical recycling. The principles of these recycling pathways are framed against current-day industrial reality, by discussing predominant industrial technologies, design strategies and recycling examples of specific waste streams. Starting with an overview on types of solid plastic waste (SPW) and their origins, the manuscript continues with a discussion on the different valorisation options for SPW. The section on mechanical recycling contains an overview of current sorting technologies, specific challenges for mechanical recycling such as thermo-mechanical or lifetime degradation and the immiscibility of polymer blends. It also includes some industrial examples such as polyethylene terephthalate (PET) recycling, and SPW from post-consumer packaging, end-of-life vehicles or electr(on)ic devices. A separate section is dedicated to the relationship between design and recycling, emphasizing the role of concepts such as Design from Recycling. The section on chemical recycling collects a state-of-the-art on techniques such as chemolysis, pyrolysis, fluid catalytic cracking, hydrogen techniques and gasification. Additionally, this review discusses the main challenges (and some potential remedies) to these recycling strategies and ground them in the relevant polymer science, thus providing an academic angle as well as an applied one.

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Authors: Ragaert, K., Delva, L., & Van Geem, K.
Affiliations: Ghent University (BE)
Corresponding author: Ragaert, Kim
ORCID: Ragaert, Kim
Delva, Laurens
Venue: Waste Management
Publisher: Elsevier BV
Published: 2017-11
Volume: 69
Pages: 24-58
ISSN: 0956-053X (ISSN-L)
DOI: 10.1016/j.wasman.2017.07.044
OpenAlex: W2749550903
Semantic Scholar: f8a9cccee3f8a964641f4253e6d9965dfee0a17d
Cited by: 3,276
References: 191
Citations by year: 2026: 531 · 2025: 598 · 2024: 505 · 2023: 486 · 2022: 397 · 2021: 347 · 2020: 235 · 2019: 111 · 2018: 61 · 2017: 5
FWCI: 8.20
Type: journal article
Language: en
Open access: closed
Licence: www.elsevier.com/tdm/userlicense/1.0/ (tdm)
Locations: Waste Management (publishedVersion)
PubMed (publishedVersion)
Ghent University Academic Bibliography (Ghent University) (submittedVersion)
Topics: Physical Sciences › Materials Science › Polymers and Plastics › Polymer crystallization and properties
Physical Sciences › Environmental Science › Waste Management and Disposal › Waste Management and Recycling
Physical Sciences › Environmental Science › Waste Management and Disposal › Recycling and Waste Management Techniques
Keywords: mechanical recycling, chemical recycling, polymer recycling, thermomechanical degradation, PET recycling, post-consumer packaging, end-of-life vehicles, electronic waste, design for recycling, chemolysis, pyrolysis, fluid catalytic cracking, hydrogen-induced cracking, gasification, waste valorization
MeSH terms: Plastics, Polyethylene Terephthalates, Polymers, Product Packaging, Recycling, Solid Waste

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