Catalytic pyrolysis of waste polyethylene terephthalate granules using a Lewis-Brønsted acid sites catalyst

Shahi, Aref; Roozbehani, Behrooz; Mirdrikvand, Mojtaba

doi:10.1007/s10098-021-02260-3

Cited by 9 publications

(4 citation statements)

References 37 publications

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“…13,19 In addition, chemocatalysts can be added to the reaction to maximize conversion rates. 20 Although moderate yields of PET monomers can be obtained during this process, pyrolysis lacks specificity and other by-products, such as benzene, toluene, naphthalene, anthracene, ethylene and propene, can also be produced during PET pyrolysis. 21 Therefore, this route is not the most suitable for recovering PET monomeric units.…”

Section: Recapturing Pet Building Block Monomers From Plastic Wastesmentioning

confidence: 99%

From trash to cash: current strategies for bio-upcycling of recaptured monomeric building blocks from poly(ethylene terephthalate) (PET) waste

Carniel,

Ferreira dos Santos,

Buarque

et al. 2024

Green Chem.

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Section: Recapturing Pet Building Block Monomers From Plastic Wastesmentioning

confidence: 99%

From trash to cash: current strategies for bio-upcycling of recaptured monomeric building blocks from poly(ethylene terephthalate) (PET) waste

Carniel,

Ferreira dos Santos,

Buarque

et al. 2024

Green Chem.

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“…The ZnO catalyst has been reported to particularly lead the pyrolysis reaction to decarboxylate benzoic acid and TPA, main pyrolysis products, to increase the amount of benzene in the liquid oil up to approximately 90% weight. This will increase the quality of the obtained fuel for subsequent processing for potential fuel applications 80–84 . Although pyrolysis is categorized as a method of chemical recycling of PET waste, it is downcycling the polymer PET value due to the thermal degradation that occurs during pyrolysis 85,86 …”

Section: Chemical Recycling: Promising Approach For Sustainable Manag...mentioning

confidence: 99%

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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“…The increase in temperature increased the PET conversion rate, forming liquid-, gas-, and solid-phase products with benzoic acid and TPA. This process is primarily affected by the formation of char, which influences the conversion rate and product yield [ 25 ]. Pyrolysis does not require intense waste sorting and feedstock pre-treatment, and is consequently convenient and flexible; hence, it is economical and less labor-intensive.…”

Section: Substrate Production By Pyrolysis Of Petmentioning

confidence: 99%

Recent Advances in the Chemobiological Upcycling of Polyethylene Terephthalate (PET) into Value-Added Chemicals

Mudondo

Lee

Jeong

et al. 2022

J. Microbiol. Biotechnol.

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Polyethylene terephthalate (PET) is a plastic material commonly applied to beverage packaging used in everyday life. Owing to PET’s versatility and ease of use, its consumption has continuously increased, resulting in considerable waste generation. Several physical and chemical recycling processes have been developed to address this problem. Recently, biological upcycling is being actively studied and has come to be regarded as a powerful technology for overcoming the economic issues associated with conventional recycling methods. For upcycling, PET should be degraded into small molecules, such as terephthalic acid and ethylene glycol, which are utilized as substrates for bioconversion, through various degradation processes, including gasification, pyrolysis, and chemical/biological depolymerization. Furthermore, biological upcycling methods have been applied to biosynthesize value-added chemicals, such as adipic acid, muconic acid, catechol, vanillin, and glycolic acid. In this review, we introduce and discuss various degradation methods that yield substrates for bioconversion and biological upcycling processes to produce value-added biochemicals. These technologies encourage a circular economy, which reduces the amount of waste released into the environment.

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Catalytic pyrolysis of waste polyethylene terephthalate granules using a Lewis-Brønsted acid sites catalyst

Cited by 9 publications

References 37 publications

From trash to cash: current strategies for bio-upcycling of recaptured monomeric building blocks from poly(ethylene terephthalate) (PET) waste

From trash to cash: current strategies for bio-upcycling of recaptured monomeric building blocks from poly(ethylene terephthalate) (PET) waste

A focused review on recycling and hydrolysis techniques of polyethylene terephthalate

Recent Advances in the Chemobiological Upcycling of Polyethylene Terephthalate (PET) into Value-Added Chemicals

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