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Plastics Recycling
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This review examines the full landscape of plastic recycling, covering mechanical and chemical recycling processes for major resin types including PE, HDPE, LDPE, PET, polyurethanes, polystyrene, and polypropylene, alongside chemical upcycling of waste plastics into higher-value products. The chapter also addresses the environmental and economic benefits of recycling, plastic resin labelling systems, and the persistent challenges limiting recycling rates globally.
This chapter discusses the recycling of plastics and the benefits that plastics can provide, such as resource conservation, energy conservation, economic benefits, reduced greenhouse gas emissions, and environmental benefits. Plastic recycling amounts and recycling rates are discussed, including the recycling of different plastic resins. The labelling of plastics according to their type of resin is also described. Various types of plastic recycling processes are discussed, including mechanical recycling as well as various forms of chemical recycling. In addition, the chemical upcycling of waste plastics into higher-value products or chemicals is also discussed. The recycling of various types of plastics, such as polyethylene, high-density polyethylene (HDPE), low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE), polyethylene terephthalate (PET), polyurethanes, polystyrene (PS), and polypropylene (PP). The challenges encountered with plastic recycling is also discussed in this chapter.
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This review surveys mechanical, chemical, and energy recovery methods for plastic waste recycling, examining challenges such as polymer degradation across cycles, the role of fillers, and advanced chemical techniques like pyrolysis and gasification. It provides practical guidance on the current state and future directions of plastic recycling across major polymer types including PET, HDPE, PP, and PS.
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This review examines strategies for upcycling waste plastics into valuable products as an alternative to landfilling and incineration, which generate microplastics and carbon emissions respectively. Researchers survey chemical recycling methods including pyrolysis, gasification, and catalytic processes that can convert common plastics like PET, polyethylene, and polystyrene into fuels, chemicals, and new materials. The study highlights the urgent need for more effective recycling technologies to address the growing gap between plastic production and waste management capacity.
Application of Different Chemical Recycling for Plastics
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This review examines chemical recycling methods for plastic waste as alternatives to mechanical recycling, focusing on depolymerization via solvolysis, pyrolysis, and purification processes applicable to PET, polyurethane, and polystyrene. The authors discuss how these approaches convert polymer waste back into feedstock monomers that can be repolymerized, addressing value degradation and sorting limitations inherent to mechanical recycling.
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Research digests by email
When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.