Kinetics of catalytic glycolysis of PET wastes with sodium carbonate

López‐Fonseca, Rubén; Duque-Ingunza, I.; Rivas, Beatriz de; Flores-Giraldo, Laura; Gutiérrez-Ortiz, José I.

doi:10.1016/j.cej.2011.01.031

Cited by 186 publications

(139 citation statements)

References 48 publications

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“…The apparent activation energy for glycolysis of PET fiber is found to be 79.3 kJ/mol. This value is slightly lower than those reported in the literature [27], ranging between 85 kJ/mol and 95 kJ/mol, for the glycolysis of PET flake from soft drink bottle, which is due to lower molecular weights and higher surface area of PET fiber than that of PET flake from soft drink bottle.…”

Section: Kinetic Analysiscontrasting

confidence: 70%

Kinetics of poly(ethylene terephthalate) fiber glycolysis in ethylene glycol

Chen

Zhou

et al. 2015

Fibers Polym

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The glycolysis of poly(ethylene terephthalate) (PET) fiber is carried out using excess ethylene glycol (EG) in the presence of Zn/Al mixed oxides. The effects of the weight ratio of EG to PET, the weight ratio of catalyst to PET, reaction temperature and reaction time on the yield of bis(hydroxyethyl terephthalate)(BHET) are investigated. The conversion of PET and yield of bis(2-hydroxyethyl terephthalate) (BHET) reach about 92.6 % and 82 % under the optimal experimental conditions. The properties of the glycolysis products have been characterized by scanning electron microscopy (SEM), infrared spectroscopy analysis (IR), differential scanning calorimeter (DSC), thermogravimetric analysis (TG) and high performance liquid chromatography (HPLC). An evolution of the glycolysis reaction is proposed. In addition, the kinetic of PET fiber is investigated. The results indicate that this glycolysis process is a first-order kinetic reaction and the activation energy is 79.3 kJ/mol, which is lower compared to the same reaction process using PET flake from the soft drink bottle.

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Section: Kinetic Analysiscontrasting

confidence: 70%

Kinetics of poly(ethylene terephthalate) fiber glycolysis in ethylene glycol

Chen

Zhou

et al. 2015

Fibers Polym

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“…Comparison of molecular decrease profiles revealing both a) random and b) non-random type of chain scission for PET glycolysis. et al [9] in particular where several variables such as agitation rate, particle size, temperature, and catalyst loading were studied. Although the kinetic data range for analysis is desired to cover the completion of reaction or a ¼ 1, this is not achieved in many cases.…”

Section: Generalized Kineticsmentioning

confidence: 99%

“…Economic viability of plastics recycling via chemical depolymerization greatly relies on efficient process design, to which an adequate understanding of the degradation kinetics is of vital importance. Although more rigorous approaches to kinetic modeling have been attempted [8,9], a comprehensive picture that links the observed depolymerization kinetics and underlying macromolecular behavior is yet to be offered.…”

Section: Introductionmentioning

confidence: 99%

Generalized kinetic analysis of heterogeneous PET glycolysis: Nucleation-controlled depolymerization

Sangalang

Bartolome

Kim

2015

Polymer Degradation and Stability

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“…They found zinc acetate to be the most effective catalyst (Table 3, 78% BHET), followed by zinc stearate (Table 3, 65% BHET) and finally zinc sulfate (Table 3, 25% BHET). Analogously, Pingale and Shukla [172], Duque-Ingunza and coworkers [203,204,206,212] studied PET-glycolysis using different sodium catalysts with different anions (carbonate, bicarbonate and sulfate). The effectiveness of the sodium catalysts on glycolysis yielding BHET decreased in the following order: sodium bicarbonate > sodium carbonate > sodium sulfate.…”

Section: Glycolysismentioning

confidence: 99%

Recycling of poly(ethylene terephthalate) – A review focusing on chemical methods

Geyer¹,

Lorenz²,

Kandelbauer³

2016

Express Polym. Lett.

196

119

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Abstract.Recycling of poly(ethylene terephthalate) (PET) is of crucial importance, since worldwide amounts of PETwaste increase rapidly due to its widespread applications. Hence, several methods have been developed, like energetic, material, thermo-mechanical and chemical recycling of PET. Most frequently, PET-waste is incinerated for energy recovery, used as additive in concrete composites or glycolysed to yield mixtures of monomers and undefined oligomers. While energetic and thermo-mechanical recycling entail downcycling of the material, chemical recycling requires considerable amounts of chemicals and demanding processing steps entailing toxic and ecological issues. This review provides a thorough survey of PET-recycling including energetic, material, thermo-mechanical and chemical methods. It focuses on chemical methods describing important reaction parameters and yields of obtained reaction products. While most methods yield monomers, only a few yield undefined low molecular weight oligomers for impaired applications (dispersants or plasticizers). Further, the present work presents an alternative chemical recycling method of PET in comparison to existing chemical methods.

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Kinetics of catalytic glycolysis of PET wastes with sodium carbonate

Cited by 186 publications

References 48 publications

Kinetics of poly(ethylene terephthalate) fiber glycolysis in ethylene glycol

Kinetics of poly(ethylene terephthalate) fiber glycolysis in ethylene glycol

Generalized kinetic analysis of heterogeneous PET glycolysis: Nucleation-controlled depolymerization

Recycling of poly(ethylene terephthalate) – A review focusing on chemical methods

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