Study of the Synergetic Effect of Co-Pyrolysis of Lignite and High-Density Polyethylene Aiming to Improve Utilization of Low-Rank Coal
The mutual impact of low-quality lignite and high-density polyethylene (HDPE) during open system pyrolysis was investigated, aiming to improve utilization of lignite with simultaneous treatment of HDPE waste. Pyrolysis of lignite, HDPE, and their mixture (mass ratio, 1:1) was performed at temperatur...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-02-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/13/5/759 |
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| author | Ivan Kojić Achim Bechtel Nikoleta Aleksić Dragana Životić Snežana Trifunović Gordana Gajica Ksenija Stojanović |
| author_facet | Ivan Kojić Achim Bechtel Nikoleta Aleksić Dragana Životić Snežana Trifunović Gordana Gajica Ksenija Stojanović |
| author_sort | Ivan Kojić |
| collection | DOAJ |
| description | The mutual impact of low-quality lignite and high-density polyethylene (HDPE) during open system pyrolysis was investigated, aiming to improve utilization of lignite with simultaneous treatment of HDPE waste. Pyrolysis of lignite, HDPE, and their mixture (mass ratio, 1:1) was performed at temperatures 400, 450, 500, 550, and 600 °C. Initial substrates and pyrolysis products were characterized by thermogravimetric analysis (TGA), gas chromatography–mass spectrometry (GC–MS), specific carbon isotope analysis of individual hydrocarbons (δ<sup>13</sup>C), Rock-Eval pyrolysis, and elemental analysis. The positive synergetic effect during co-pyrolysis of lignite/HDPE mixture was observed at temperatures ≥450 °C, with the greatest being at 500 °C. The highest yield of liquid co-pyrolysis products with a similar composition to that of crude oils is also noticed at 500 °C. The yields of liquid and gaseous products and quality of pyrolytic products obtained by co-pyrolysis of lignite/HDPE mixture are notably improved compared with pyrolysis of lignite alone. On the other hand, data obtained from pyrolysis of HDPE alone indicate that it cannot be concurrent to well-developed catalytic thermal processes for polymer recycling. However, concerning the huge amount of produced HDPE, at least part of this plastic material can be reused for advanced thermal treatment of lignite, particularly in countries where this low-rank coal represents the main source of energy. |
| first_indexed | 2024-03-09T06:10:43Z |
| format | Article |
| id | doaj.art-a45ed4acb73c412cb41a7a55c07c02f0 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-09T06:10:43Z |
| publishDate | 2021-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-a45ed4acb73c412cb41a7a55c07c02f02023-12-03T11:58:37ZengMDPI AGPolymers2073-43602021-02-0113575910.3390/polym13050759Study of the Synergetic Effect of Co-Pyrolysis of Lignite and High-Density Polyethylene Aiming to Improve Utilization of Low-Rank CoalIvan Kojić0Achim Bechtel1Nikoleta Aleksić2Dragana Životić3Snežana Trifunović4Gordana Gajica5Ksenija Stojanović6Innovation Center of the Faculty of Chemistry, University of Belgrade, Studentski Trg 12-16, 11000 Belgrade, SerbiaDepartment of Applied Geosciences and Geophysics, Montanuniversität Leoben, Peter-Tunner-Str. 5, A-8700 Leoben, AustriaFaculty of Mining and Geology, University of Belgrade, Đušina 7, 11000 Belgrade, SerbiaFaculty of Mining and Geology, University of Belgrade, Đušina 7, 11000 Belgrade, SerbiaFaculty of Chemistry, University of Belgrade, Studentski Trg 12-16, 11000 Belgrade, SerbiaInstitute of Chemistry, Technology and Metallurgy, Center of Chemistry, University of Belgrade, Studentski Trg 12-16, 11000 Belgrade, SerbiaFaculty of Chemistry, University of Belgrade, Studentski Trg 12-16, 11000 Belgrade, SerbiaThe mutual impact of low-quality lignite and high-density polyethylene (HDPE) during open system pyrolysis was investigated, aiming to improve utilization of lignite with simultaneous treatment of HDPE waste. Pyrolysis of lignite, HDPE, and their mixture (mass ratio, 1:1) was performed at temperatures 400, 450, 500, 550, and 600 °C. Initial substrates and pyrolysis products were characterized by thermogravimetric analysis (TGA), gas chromatography–mass spectrometry (GC–MS), specific carbon isotope analysis of individual hydrocarbons (δ<sup>13</sup>C), Rock-Eval pyrolysis, and elemental analysis. The positive synergetic effect during co-pyrolysis of lignite/HDPE mixture was observed at temperatures ≥450 °C, with the greatest being at 500 °C. The highest yield of liquid co-pyrolysis products with a similar composition to that of crude oils is also noticed at 500 °C. The yields of liquid and gaseous products and quality of pyrolytic products obtained by co-pyrolysis of lignite/HDPE mixture are notably improved compared with pyrolysis of lignite alone. On the other hand, data obtained from pyrolysis of HDPE alone indicate that it cannot be concurrent to well-developed catalytic thermal processes for polymer recycling. However, concerning the huge amount of produced HDPE, at least part of this plastic material can be reused for advanced thermal treatment of lignite, particularly in countries where this low-rank coal represents the main source of energy.https://www.mdpi.com/2073-4360/13/5/759ligniteHDPEco-pyrolysissynergetic effect |
| spellingShingle | Ivan Kojić Achim Bechtel Nikoleta Aleksić Dragana Životić Snežana Trifunović Gordana Gajica Ksenija Stojanović Study of the Synergetic Effect of Co-Pyrolysis of Lignite and High-Density Polyethylene Aiming to Improve Utilization of Low-Rank Coal Polymers lignite HDPE co-pyrolysis synergetic effect |
| title | Study of the Synergetic Effect of Co-Pyrolysis of Lignite and High-Density Polyethylene Aiming to Improve Utilization of Low-Rank Coal |
| title_full | Study of the Synergetic Effect of Co-Pyrolysis of Lignite and High-Density Polyethylene Aiming to Improve Utilization of Low-Rank Coal |
| title_fullStr | Study of the Synergetic Effect of Co-Pyrolysis of Lignite and High-Density Polyethylene Aiming to Improve Utilization of Low-Rank Coal |
| title_full_unstemmed | Study of the Synergetic Effect of Co-Pyrolysis of Lignite and High-Density Polyethylene Aiming to Improve Utilization of Low-Rank Coal |
| title_short | Study of the Synergetic Effect of Co-Pyrolysis of Lignite and High-Density Polyethylene Aiming to Improve Utilization of Low-Rank Coal |
| title_sort | study of the synergetic effect of co pyrolysis of lignite and high density polyethylene aiming to improve utilization of low rank coal |
| topic | lignite HDPE co-pyrolysis synergetic effect |
| url | https://www.mdpi.com/2073-4360/13/5/759 |
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