| Title: | Kinetics study of hydrothermal degradation of PET waste into useful products |
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| Authors: | ID Čolnik, Maja (Author)
ID Pečar, Darja (Author)
ID Knez, Željko (Author)
ID Goršek, Andreja (Author)
ID Škerget, Mojca (Author) |
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| Files: |  Kinetics_Study_of_Hydrothermal_Deg-Colnik-2022.pdf (2,22 MB)
MD5: D16B3ECD53F9DF2159B9015FDF4C508A
 https://www.mdpi.com/2227-9717/10/1/24
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| Language: | English |
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| Work type: | Scientific work |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: | FKKT - Faculty of Chemistry and Chemical Engineering
MF - Faculty of Medicine
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| Abstract: | Kinetics of hydrothermal degradation of colorless polyethylene terephthalate (PET) waste was studied at two temperatures (300 °C and 350 °C) and reaction times from 1 to 240 min. PET waste was decomposed in subcritical water (SubCW) by hydrolysis to terephthalic acid (TPA) and ethylene glycol (EG) as the main products. This was followed by further degradation of TPA to benzoic acid by decarboxylation and degradation of EG to acetaldehyde by a dehydration reaction. Furthermore, by-products such as isophthalic acid (IPA) and 1,4-dioxane were also detected in the reaction mixture. Taking into account these most represented products, a simplified kinetic model describing the degradation of PET has been developed, considering irreversible consecutive reactions that take place as parallel in reaction mixture. The reaction rate constants (k1–k6) for the individual reactions were calculated and it was observed that all reactions follow first-order kinetics. |
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| Keywords: | PET waste, subcritical water, kinetics, degradation, TPA |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Submitted for review: | 06.12.2021 |
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| Article acceptance date: | 21.12.2021 |
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| Publication date: | 23.12.2021 |
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| Publisher: | MDPI |
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| Year of publishing: | 2022 |
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| Number of pages: | 12 str. |
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| Numbering: | Letn. 10, Št. 1, št. članka 24 |
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| PID: | 20.500.12556/DKUM-85900  |
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| UDC: | 66.02 |
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| ISSN on article: | 2227-9717 |
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| COBISS.SI-ID: | 92221955 |
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| DOI: | 10.3390/pr10010024 |
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| Copyright: | © 2021 by the authors |
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| Publication date in DKUM: | 18.09.2023 |
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| Views: | 856 |
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| Downloads: | 266 |
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| Metadata: |    |
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| Categories: | Misc.
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