Chemical Recycling of Monolayer Pet Tray Waste by Alkaline Hydrolysis

Vinuesa, Asier Barredo; Asueta, Asier; Amundarain, Izotz; Leivar, Jon; Miguel-Fernández, Rafael; Arnaiz, Sixto; Epelde, Eva; López‐Fonseca, Rubén; Gutiérrez-Ortiz, José I.

doi:10.2139/ssrn.4333376

Cited by 3 publications

(2 citation statements)

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“…Therefore, crucial to realize PET plastics upgrading is developing an efficient strategy for PET plastics depolymerization. The general approaches, including physical, chemical, and biological methods, were employed to depolymerize PET plastics into monomers or derivatives [47,48]. Among them, grinding PET plastics into powder was applied to PET recycling as a physical method, and other physical methods utilized in the depolymerization of PET plastics include melting and ultrasonic treatment, both which are designed to reduce the crystallinity of PET plastics and to finally break PET plastic down into small fragments [49,50].…”

Section: Pet Plastics Depolymerizationmentioning

confidence: 99%

Recent advances on solar-driven valorization of polyethylene terephthalate plastics into value-added chemicals

Kang,

Yuan,

Chen

et al. 2023

Nanotechnology

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The random disposal and immature recycling of post-consumer polyethylene terephthalate (PET) packages lead to a severe threaten to the ecological system owing to slow natural degradation kinetics of PET plastic, and meanwhile cause a waste of carbon resources stored in PET plastics. Many methods have been developed to recycle PET plastics, such as mechanical recycling, which induced a reduced property relative to the virgin PET. In recent years, the photocatalytic conversion of PET plastic wastes into chemicals has received considerable attention due to their unique advantages, including mild conditions, less energy consumption, and simple operation. In this review, we have summarized the latest achievements in photoreforming of PET plastics into value-added chemicals. Primarily, we described the mechanism for bond cleavage during PET photoreforming, the emerging pretreatment methodologies for PET plastics, and the advantages of photocatalytic PET plastics conversion. Then, we introduced electro-/bio-assisted photocatalysis technologies for PET disposal and commented their strengths and limitations. Finally, we put forward the challenges and potential advances in the domain of photocatalytic PET plastics conversion.

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Section: Pet Plastics Depolymerizationmentioning

confidence: 99%

Recent advances on solar-driven valorization of polyethylene terephthalate plastics into value-added chemicals

Kang,

Yuan,

Chen

et al. 2023

Nanotechnology

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“…In this process, PET undergoes hydrolysis under alkaline conditions, leading to the transformation of PET into ethylene glycol (EG) and either terephthalate (TPA) or purification of terephthalic acid (PTA) (Figure 1A). 1,56,57 Subsequently, TPA can be extracted from the hydrolyzate as a raw material for the production of new PET 58 . By the end of 2021, the market of EG was projected to witness an output of around 24.95 million tons, with total market consumption reaching approximately 25.61 million tons, leading to a state of equilibrium between market supply and demand.…”

Section: Introductionmentioning

confidence: 99%

Electrocatalysis‐driven sustainable plastic waste upcycling

Wang,

Chen,

Wei

et al. 2024

Electron

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With large quantities and natural resistance to degradation, plastic waste raises growing environmental concerns in the world. To achieve the upcycling of plastic waste into value‐added products, the electrocatalytic‐driven process is emerging as an attractive option due to the mild operation conditions, high reaction selectivity, and low carbon emission. Herein, this review provides a comprehensive overview of the upgrading of plastic waste via electrocatalysis. Specifically, key electrooxidation processes including the target products, intermediates and reaction pathways in the plastic electro‐reforming process are discussed. Subsequently, advanced electrochemical systems, including the integration of anodic plastic monomer oxidation and value‐added cathodic reduction and photo‐involved electrolysis processes, are summarized. The design strategies of electrocatalysts with enhanced activity are highlighted and catalytic mechanisms in the electrocatalytic oxidation of plastic waste are elucidated. To promote the electrochemistry‐driven sustainable upcycling of plastic waste, challenges and opportunities are further put forward.

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A focused review on recycling and hydrolysis techniques of polyethylene terephthalate

Abedsoltan

2023

Polymer Engineering & Sci

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Polyethylene terephthalate (PET) is used in textile and packaging industries. The main source of PET production is fossil fuels with limited capacity. Also, PET products are single use that transform into high volumes of wastes, causing ecosystem problems. Recycling is proposed to confront this challenge. The four major PET recycling techniques are mechanical, chemical, pyrolysis, and enzymatic. Mechanical, pyrolysis, and enzymatic techniques have constrained capabilities to manage PET waste. Chemical recycling is the potential path to expanding recycling PET waste with possibility of upcycling and addressing dirty waste streams. Several chemical methods are introduced and discussed in literature. The five major chemical recycling techniques are glycolysis, alcoholysis, aminolysis, ammonolysis, and hydrolysis. This review describes PET depolymerization via these techniques and introduces hydrolysis as the one that can depolymerize PET in an organic‐free solvent environment. Hydrolysis tolerates PET mixed wastes streams including copolymers. It helps avoid challenges attributed to using organic solvents in reaction systems. Moreover, hydrolysis produces terephthalic acid, PET monomer, which has recently gained attention as the initiative monomer for PET production. The review focuses on three forms of hydrolysis—alkaline, neutral, and acid, by presenting background studies, issued patents, and recent trends on application of hydrolysis.

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Chemical Recycling of Monolayer Pet Tray Waste by Alkaline Hydrolysis

Cited by 3 publications

References 0 publications

Recent advances on solar-driven valorization of polyethylene terephthalate plastics into value-added chemicals

Recent advances on solar-driven valorization of polyethylene terephthalate plastics into value-added chemicals

Electrocatalysis‐driven sustainable plastic waste upcycling

A focused review on recycling and hydrolysis techniques of polyethylene terephthalate

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