Kinetics study of hydrothermal degradation of PET waste into useful products
Povzetek
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.
Ključne besede
odpadki PET;subkritična voda;kinetika;degradacija;PET waste;subcritical water;kinetics;degradation;TPA;
Podatki
| Jezik: | Angleški jezik |
|---|---|
| Leto izida: | 2022 |
| Tipologija: | 1.01 - Izvirni znanstveni članek |
| Organizacija: | UM FKKT - Fakulteta za kemijo in kemijsko tehnologijo |
| Založnik: | MDPI |
| UDK: | 66.02 |
| COBISS: |
92221955
|
| ISSN: | 2227-9717 |
| Št. ogledov: | 645 |
| Št. prenosov: | 96 |
| Ocena: | 0 (0 glasov) |
| Metapodatki: |
|
Ostali podatki
| Sekundarni jezik: | Slovenski jezik |
|---|---|
| Sekundarne ključne besede: | odpadki PET;subkritična voda;kinetika;degradacija; |
| Vrsta dela (COBISS): | Znanstveno delo |
| Strani: | 12 str. |
| Letnik: | ǂVol. ǂ10 |
| Zvezek: | ǂiss. ǂ1 |
| Čas izdaje: | 2022 |
| DOI: | 10.3390/pr10010024 |
| ID: | 19945516 |
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