Plastic pyrolysis over HZSM-5 zeolite and fluid catalytic cracking catalyst under ultra-fast heating.
Plastic pollution compromises the environment and human well-being, and a global transition to a circular economy of plastics is vital to address this challenge. Pyrolysis is a key technology for the end-of-life recycling of plastics, although high energy consumption limits the economic feasibility...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier B.V.
2023
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| Online Access: | http://eprints.utm.my/106236/1/BemgbaBevanNyakuma2023_PlasticPyrolysisOverHZSM5ZeoliteandFluid.pdf |
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| author | Wong, Syie Luing Armenise, Sabino Nyakuma, Bemgba Bevan Bogush, Anna Towers, Sam Lee, Chia Hau Wong, Keng Yinn Lee, Ting Hun Rebrov, Evgeny Muñoz, Marta |
| author_facet | Wong, Syie Luing Armenise, Sabino Nyakuma, Bemgba Bevan Bogush, Anna Towers, Sam Lee, Chia Hau Wong, Keng Yinn Lee, Ting Hun Rebrov, Evgeny Muñoz, Marta |
| author_sort | Wong, Syie Luing |
| collection | ePrints |
| description | Plastic pollution compromises the environment and human well-being, and a global transition to a circular economy of plastics is vital to address this challenge. Pyrolysis is a key technology for the end-of-life recycling of plastics, although high energy consumption limits the economic feasibility of the process. Various research has shown that the application of induction heating in biomass pyrolysis reduces energy consumption when compared to conventional heating. Nevertheless, the potential of induction heating in plastic pyrolysis is rarely explored. This paper presents an exploratory study on the thermal and catalytic pyrolysis of high-density polyethylene, low-density polyethylene, and polypropylene in a fixed bed reactor through induction heating. An MFI-type HZSM-5 zeolite (SiO2/Al2O3 = 23) and an FAU-type spent fluid catalytic cracking (FCC) catalyst with distinctive Brønsted acidity and textural properties were used. A complete conversion of the plastic feedstocks was achieved within 10 min, even without a catalyst. Thermal pyrolysis produced wax (72.4–73.9 wt%) and gas products, indicating a limited degree of polymer cracking. Catalytic pyrolysis over HZSM-5 and FCC catalyst significantly improved polymer cracking, leading to higher gas (up to 75.2 wt%) and liquid product (up to 35.9 wt%) yields at the expense of wax yield (up to 25.4 wt%). In general, the gas products were rich in C3 and C4 compounds. The liquid product composition was highly dependent on the catalyst properties, for example, the HZSM-5 produced high aromatics, while the FCC catalyst produced high alkenes in the liquid products. The catalyst acidity and textural properties played an essential role in plastic pyrolysis within the short reaction time. This study demonstrated the feasibility of a fast, energy-efficient, and versatile plastic valorization technology based on the application of induction heating, where the plastic feed can be converted into wax, gas, and liquid products depending on the end-use applications. |
| first_indexed | 2024-09-24T00:01:04Z |
| format | Article |
| id | utm.eprints-106236 |
| institution | Universiti Teknologi Malaysia - ePrints |
| language | English |
| last_indexed | 2024-09-24T00:01:04Z |
| publishDate | 2023 |
| publisher | Elsevier B.V. |
| record_format | dspace |
| spelling | utm.eprints-1062362024-06-20T02:14:54Z http://eprints.utm.my/106236/ Plastic pyrolysis over HZSM-5 zeolite and fluid catalytic cracking catalyst under ultra-fast heating. Wong, Syie Luing Armenise, Sabino Nyakuma, Bemgba Bevan Bogush, Anna Towers, Sam Lee, Chia Hau Wong, Keng Yinn Lee, Ting Hun Rebrov, Evgeny Muñoz, Marta QD Chemistry Plastic pollution compromises the environment and human well-being, and a global transition to a circular economy of plastics is vital to address this challenge. Pyrolysis is a key technology for the end-of-life recycling of plastics, although high energy consumption limits the economic feasibility of the process. Various research has shown that the application of induction heating in biomass pyrolysis reduces energy consumption when compared to conventional heating. Nevertheless, the potential of induction heating in plastic pyrolysis is rarely explored. This paper presents an exploratory study on the thermal and catalytic pyrolysis of high-density polyethylene, low-density polyethylene, and polypropylene in a fixed bed reactor through induction heating. An MFI-type HZSM-5 zeolite (SiO2/Al2O3 = 23) and an FAU-type spent fluid catalytic cracking (FCC) catalyst with distinctive Brønsted acidity and textural properties were used. A complete conversion of the plastic feedstocks was achieved within 10 min, even without a catalyst. Thermal pyrolysis produced wax (72.4–73.9 wt%) and gas products, indicating a limited degree of polymer cracking. Catalytic pyrolysis over HZSM-5 and FCC catalyst significantly improved polymer cracking, leading to higher gas (up to 75.2 wt%) and liquid product (up to 35.9 wt%) yields at the expense of wax yield (up to 25.4 wt%). In general, the gas products were rich in C3 and C4 compounds. The liquid product composition was highly dependent on the catalyst properties, for example, the HZSM-5 produced high aromatics, while the FCC catalyst produced high alkenes in the liquid products. The catalyst acidity and textural properties played an essential role in plastic pyrolysis within the short reaction time. This study demonstrated the feasibility of a fast, energy-efficient, and versatile plastic valorization technology based on the application of induction heating, where the plastic feed can be converted into wax, gas, and liquid products depending on the end-use applications. Elsevier B.V. 2023-01 Article PeerReviewed application/pdf en http://eprints.utm.my/106236/1/BemgbaBevanNyakuma2023_PlasticPyrolysisOverHZSM5ZeoliteandFluid.pdf Wong, Syie Luing and Armenise, Sabino and Nyakuma, Bemgba Bevan and Bogush, Anna and Towers, Sam and Lee, Chia Hau and Wong, Keng Yinn and Lee, Ting Hun and Rebrov, Evgeny and Muñoz, Marta (2023) Plastic pyrolysis over HZSM-5 zeolite and fluid catalytic cracking catalyst under ultra-fast heating. Journal of Analytical and Applied Pyrolysis, 169 (105793). NA-NA. ISSN 0165-2370 http://dx.doi.org/10.1016/j.jaap.2022.105793 DOI: 10.1016/j.jaap.2022.105793 |
| spellingShingle | QD Chemistry Wong, Syie Luing Armenise, Sabino Nyakuma, Bemgba Bevan Bogush, Anna Towers, Sam Lee, Chia Hau Wong, Keng Yinn Lee, Ting Hun Rebrov, Evgeny Muñoz, Marta Plastic pyrolysis over HZSM-5 zeolite and fluid catalytic cracking catalyst under ultra-fast heating. |
| title | Plastic pyrolysis over HZSM-5 zeolite and fluid catalytic cracking catalyst under ultra-fast heating. |
| title_full | Plastic pyrolysis over HZSM-5 zeolite and fluid catalytic cracking catalyst under ultra-fast heating. |
| title_fullStr | Plastic pyrolysis over HZSM-5 zeolite and fluid catalytic cracking catalyst under ultra-fast heating. |
| title_full_unstemmed | Plastic pyrolysis over HZSM-5 zeolite and fluid catalytic cracking catalyst under ultra-fast heating. |
| title_short | Plastic pyrolysis over HZSM-5 zeolite and fluid catalytic cracking catalyst under ultra-fast heating. |
| title_sort | plastic pyrolysis over hzsm 5 zeolite and fluid catalytic cracking catalyst under ultra fast heating |
| topic | QD Chemistry |
| url | http://eprints.utm.my/106236/1/BemgbaBevanNyakuma2023_PlasticPyrolysisOverHZSM5ZeoliteandFluid.pdf |
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