| Title: | Chemical recycling of polyolefins waste materials using supercritical water |
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| Authors: | ID Čolnik, Maja (Author)
ID Kotnik, Petra (Author)
ID Knez, Željko (Author)
ID Škerget, Mojca (Author) |
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| Files: |  Chemical_Recycling_of_Polyolefins-Colnik-2022.pdf (3,44 MB)
MD5: 0D3893891A636E9A4F2C302C9A068E90
 https://www.mdpi.com/2073-4360/14/20/4415
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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: | In the following work, the hydrothermal degradation of polypropylene waste (PP) using supercritical water (SCW) has been studied. The procedure was carried out in a high-pressure, high-temperature batch reactor at 425 °C and 450 °C from 15 to 240 min. The results show a high yield of the oil (up to 95%) and gas (up to 20%) phases. The gained oil phase was composed of alkanes, alkenes, cycloalkanes, aromatic hydrocarbons, and alcohols. Alkanes and alcohols predominated at 425 °C and shorter reaction times, while the content of aromatic hydrocarbons sharply increased at higher temperatures and times. The higher heating values (HHVs) of oil phases were in the range of liquid fuel (diesel, gasoline, crude and fuel oil), and they were between 48 and 42 MJ/kg. The gas phase contained light hydrocarbons (C1–C6), where propane was the most represented component. The results for PP degradation obtained in the present work were compared to the results of SCW degradation of colored PE waste, and the potential degradation mechanism of polyolefins waste in SCW is proposed. The results allowed to conclude that SCW processing technology represents a promising and eco-friendly tool for the liquefaction of polyolefin (PE and PP) waste into oil with a high conversion rate. |
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| Keywords: | polypropylene, polyolefins, supercritical water, plastics waste, chemical recycling |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Submitted for review: | 13.09.2022 |
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| Article acceptance date: | 16.10.2022 |
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| Publication date: | 19.10.2022 |
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| Publisher: | MDPI |
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| Year of publishing: | 2022 |
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| Number of pages: | 18 str. |
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| Numbering: | Letn. 14, Št. 20, številka članka 4415 |
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| PID: | 20.500.12556/DKUM-85896  |
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| UDC: | 66.02 |
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| ISSN on article: | 2073-4360 |
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| COBISS.SI-ID: | 126526723 |
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| DOI: | 10.3390/polym14204415 |
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| Copyright: | © 2022 by the authors |
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| Publication date in DKUM: | 18.09.2023 |
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| Views: | 752 |
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| Downloads: | 172 |
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| Metadata: |    |
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| Categories: | Misc.
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