Application of Low-Temperature Solvolysis for Processing of Reinforced Carbon Plastics

Лебедева, Е. А.; Астафьева, С. А.; Istomina, T. S.; Trukhinov, D. K.; Ilinykh, Galina; Slyusar, N.N.

doi:10.1134/s1070427220060117

Cited by 14 publications

(6 citation statements)

References 22 publications

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“…In solvolysis, the PET waste is depolymerized in a solvent in the presence of a catalyst to produce monomers, BHET or TPA and oligomers that can be used to synthesize PET or other polymers. [67][68][69][70] Pyrolysis is applied when the PET waste has high impurities including contaminants and other polymeric wastes and cannot be recycled using other methods. During pyrolysis, the PET waste is exposed to high reaction temperatures, starting from 370 up to 700 C, in an oxygen free environment.…”

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

confidence: 99%

“…In pyrolysis, the PET waste will go through extreme heating process under vacuum condition to produce variety of hydrocarbons. In solvolysis, the PET waste is depolymerized in a solvent in the presence of a catalyst to produce monomers, BHET or TPA and oligomers that can be used to synthesize PET or other polymers 67–70 …”

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

confidence: 99%

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

confidence: 99%

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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“…52,71,[102][103][104][105][106][107] Given the consistent nature of residue formation in our experiments of Figure 10, the resulting solid residues from polypropylene pyrolysis were characterized. Char was analyzed by multiple methods including microscopy, 13 C solid-state NMR, Raman spectroscopy, and attenuated total reflectance infrared (ATR-IR) spectroscopy. Other techniques, such as gel permeation chromatography (GPC), were not utilized due to low residue masses.…”

Section: Comparison Of Measured Intrinsic Reactionmentioning

confidence: 99%

“…[6][7][8][9]11 Many chemical recycling processing options exist including solvolysis, hydrolysis, and pyrolysis. 8,9,[12][13][14] Pyrolysis is the thermal conversion of a material in an inert oxygen-free environment to produce a variety of liquids and gases, including plastic monomers; this processing method can accommodate highly heterogenous and contaminated plastic waste streams, making it more cost-effective at scale. 3,9,10,15 The chemistry of polypropylene pyrolysis is highly complex, involving many intermediates and products.…”

mentioning

confidence: 99%

On the Intrinsic Reaction Kinetics of Polypropylene Pyrolysis

Sidhu

Mastalski

Zolghadr

et al. 2023

Preprint

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The growing global plastic waste challenge requires the development of new plastic waste management strategies such as pyrolysis that will enable a circular plastic economy. Pyrolyzed plastics thermally convert into a complex mixture of intermediates and products that includes their constituent monomers. Developing optimized, scalable pyrolysis reactors capable of maximizing the yield of desired olefinic products requires a fundamental understanding of plastic pyrolysis mechanisms and reaction kinetics. Accordingly, the intrinsic reaction kinetics of polypropylene (PP) pyrolysis have been evaluated by the method of Pulse-Heated Analysis of Solid Reactions (PHASR), which enables the time-resolved measurement of pyrolysis kinetics at high temperature absent heat and mass transfer limitations. The yield of gas chromatography-detectable light species (<C20) and the total yield of volatile products were quantified at five temperatures (525, 550, 575, 600, and 625 °C) for reaction times of 20 ms to 2.0 s, generating polypropylene pyrolysis product evolution curves that were compared to literature data. The overall reaction kinetics were described by a lumped first-order consumption model with an activation energy of 242.0 ± 2.9 kJ/mol and a pre-exponential factor of 35.5 ± 0.6 ln(1/s). Additionally, the production of the solid residues formed during polypropylene pyrolysis was investigated, revealing a secondary kinetic regime.

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“…The development in different recycling technologies is responding to the growing availability of plastic products, at the end of their useful life and the growing increase in the demand for these products (51,52), added to the fact that the environmental legislations of many countries are becoming increasingly strict, managing to restrict a series of materials that are disposed of in landfills (53). In this way, the chemical recycling of plastic waste represents a greener alternative to landfilling and incineration (54), and offers a solution to the environmental consequences of the increase in plastic waste (55).…”

Section: Chemical Upcycling Recyclingmentioning

confidence: 99%

Polymers Recycling: Upcycling Techniques. An Overview

Zúñiga D,

Aranda,

Rivas

2023

J. Chil. Chem. Soc.

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Since 1950 plastics became the materials of greatest world production. Thus, in recent years the increase in the use of different types of plastics has been a matter of global concern due to the depletion of fossil fuels and the accumulation of waste in the different environmental matrices, affecting the ecosystem. By 2015, 4.9 million metric tons of plastic waste were recorded in landfills, because more than 40% of the plastics produced are designed for single use. The mass amount of plastic is estimated to exceed 450 million tonnes per year and will double by 2045.Due to the great problem of plastics and their threats to the ecosystem, the researchers worked on a large number of technologies to mitigate the effect of plastics on the different environmental matrices. Therefore, the main goal of this manuscript is summarizes on the plastics more used as well as the most common techniques to reduce their presence at the environment.

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Application of Low-Temperature Solvolysis for Processing of Reinforced Carbon Plastics

Cited by 14 publications

References 22 publications

A focused review on recycling and hydrolysis techniques of polyethylene terephthalate

A focused review on recycling and hydrolysis techniques of polyethylene terephthalate

On the Intrinsic Reaction Kinetics of Polypropylene Pyrolysis

Polymers Recycling: Upcycling Techniques. An Overview

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