Plastic Waste; Chemical Recycling; Technology Readiness Level; Value Chain; Circular Economy
Abstract :
[en] It is estimated that nearly 400 million tons of plastic are produced each year worldwide. However, only 10% of this enormous amount is recycled after use. Currently, mechanical recycling is the dominant method, despite certain operational limitations. To increase recycling rates, chemical recycling processes are emerging as viable alternatives, promising the creation of more valuable products. This comprehensive review begins with an introduction to ongoing plastic recycling technologies, covering general pretreatment methods for plastic waste and the taxonomy of various recycling technologies and their applications for specific polymer recycling. Then various aspects of chemical recycling are examined to explore its role within the context of a circular economy. Detailing chemical recycling technologies, such as depolymerization pathways and thermochemical pathways, are systematically elaborated. It also delves into optimization strategies, technological maturity, and economic assessments of chemical recycling. In addition, this review also examines the symbiotic and/or substitutional relationship between conventional recycling methods and alternatives, including biological recycling, biodegradable polymers, and eco-design. Finally, the approaches to improve the large-scale application of chemical recycling technology from the perspectives of technological level, infrastructure construction, public awareness enhancement, and national and international policy formulation are discussed. This review aims to provide theoretical support and practical recommendations for the future development of chemical recycling technologies to achieve the goals of sustainable development and a circular economy. [fr] On estime que près de 400 millions de tonnes de plastique sont produites chaque année dans le monde. Cependant, seulement 10 % de cette énorme quantité est recyclée après usage. Actuellement, le recyclage mécanique est la méthode dominante, malgré certaines limitations opérationnelles. Pour augmenter les taux de recyclage, des procédés de recyclage chimique émergent comme des alternatives viables, promettant la création de produits plus précieux. Cette revue exhaustive commence par une introduction aux technologies de recyclage des plastiques en cours, couvrant les méthodes générales de prétraitement des déchets plastiques et la taxonomie des différentes technologies de recyclage ainsi que leurs applications pour le recyclage spécifique des polymères. Ensuite, divers aspects du recyclage chimique sont examinés pour explorer son rôle dans le contexte d'une économie circulaire. Les technologies de recyclage chimique, telles que les voies de dépolymérisation et les voies thermochimiques, sont systématiquement détaillées. Il explore également les stratégies d'optimisation, la maturité technologique et les évaluations économiques du recyclage chimique. De plus, cette revue examine également la relation symbiotique et/ou substitutionnelle entre les méthodes de recyclage conventionnelles et les alternatives, y compris le recyclage biologique, les polymères biodégradables et l'éco-conception. Enfin, les approches visant à améliorer l'application à grande échelle de la technologie de recyclage chimique du point de vue du niveau technologique, de la construction des infrastructures, de la sensibilisation du public et de la formulation de politiques nationales et internationales sont discutées. Cette revue vise à fournir un soutien théorique et des recommandations pratiques pour le développement futur des technologies de recyclage chimique afin d'atteindre les objectifs de développement durable et d'économie circulaire.
Disciplines :
Chemistry
Author, co-author :
Liu, Qi; Key Laboratory of Prevention and Control of Residual Pollution in Agricultural Film, Ministry of Agriculture and Rural Affairs, Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China
Wang, Shu; Jinan University - University of Birmingham Joint Institute, Jinan University, Guangzhou 511436, China
Ngoc Thanh Tien, Nguyen; Department of Food Technology, School of Biotechnology, International University, Quarter 6, Linh Trung Ward, Thu Duc City, Ho Chi Minh City 700000, Vietnam Vietnam National University, Ho Chi Minh City 700000, Vietnam
Len, Christophe; Chimie ParisTech, CNRS, PSL Research University, Institute of Chemistry for Life and Health Sciences, 11 rue Pierre et Marie Curie, Paris F-75005, France
Richel, Aurore ; Université de Liège - ULiège > TERRA Research Centre > Chemistry for Sustainable Food and Environmental Systems (CSFES)
Language :
English
Title :
The role of plastic chemical recycling processes in a circular economy context
Alternative titles :
[fr] Le rôle des procédés de recyclage chimique dans un contexte d'économie circulaire
Publication date :
October 2024
Journal title :
Chemical Engineering Journal
ISSN :
1385-8947
eISSN :
1873-3212
Publisher :
Elsevier BV
Volume :
498
Pages :
155227
Peer reviewed :
Peer Reviewed verified by ORBi
Development Goals :
7. Affordable and clean energy 9. Industry, innovation and infrastructure 12. Responsible consumption and production
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