Catalytic co-pyrolysis of empty fruit bunch and high-density polyethylene mixtures over rice husk ash: thermogravimetric, kinetic and thermodynamic analyses
Rice husk ash (RHA) has been used as a catalyst precursor but there are lack of studies on the application of the resulting catalyst. This study allows researchers to have an insight on using RHA-sourced catalysts in pyrolysis and be encouraged to utilize waste materials in the future. The goal of t...
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| Format: | Article |
| Language: | English |
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Elsevier Ltd
2022
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| Online Access: | http://eprints.utm.my/98650/1/VekesBalasundram2022_CatalyticCoPyrolysisofEmptyFruit.pdf |
| _version_ | 1796866662388989952 |
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| author | Shahdan, Nadhilah Aqilah Balasundram, Vekes Ibrahim, Norazana Isha, Ruzinah Abdul Manan, Zainuddin |
| author_facet | Shahdan, Nadhilah Aqilah Balasundram, Vekes Ibrahim, Norazana Isha, Ruzinah Abdul Manan, Zainuddin |
| author_sort | Shahdan, Nadhilah Aqilah |
| collection | ePrints |
| description | Rice husk ash (RHA) has been used as a catalyst precursor but there are lack of studies on the application of the resulting catalyst. This study allows researchers to have an insight on using RHA-sourced catalysts in pyrolysis and be encouraged to utilize waste materials in the future. The goal of this study is to examine the effect of catalysts derived from rice husk ash (RHA) using the solvent-free method, labelled as RHA-T, on the catalytic co-pyrolysis of empty fruit bunch (EFB) and high-density polyethylene (HDPE) via thermogravimetric analyser (TGA). Comparisons were then made with co-pyrolysis and catalytic co-pyrolysis over raw RHA and Hydrogen-exchanged Zeolite Socony Mobil-5 (HZSM-5). Thermogravimetric analysis was conducted (EFB-to-HDPE mass ratio of 1:1, catalyst-to-feedstock mass ratio of 1:1) in a nitrogen atmosphere, where samples were heated from 30 °C until 700 °C (heating rate 20 °C/min). The order of runs with highest mass loss in the second phase is as follows, with the term ‘BP’ indicating the biomass-plastic feedstock: BP-RHA-T (98.17 wt%), BP-RHA (96.25 wt%), BP (86.82 wt%) and BP-HZSM-5 (70.59 wt%). Kinetic analysis using Coats-Redfern method and comparing between different diffusional reaction models showed that using BP-RHA-T follows a one-dimensional diffusion reaction, similar to the non-catalytic run. Using RHA-T resulted in higher activation energy (83.03 kJ/mol to 84.91 kJ/mol) compared to the non-catalytic run (62.39 kJ/mol to 68.97 kJ/mol). Thermodynamic analysis showed the pyrolysis runs were endothermic and non-spontaneous. Using RHA-T resulted in a higher change of enthalpy, a lower change of Gibbs free energy and a less negative change of entropy. It can be concluded that applying catalysts synthesized using low-cost materials like RHA can improve the degradation of EFB and HDPE via pyrolysis, compared to commercial HZSM-5 catalysts. |
| first_indexed | 2024-03-05T21:15:31Z |
| format | Article |
| id | utm.eprints-98650 |
| institution | Universiti Teknologi Malaysia - ePrints |
| language | English |
| last_indexed | 2024-03-05T21:15:31Z |
| publishDate | 2022 |
| publisher | Elsevier Ltd |
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| spelling | utm.eprints-986502023-01-30T04:05:53Z http://eprints.utm.my/98650/ Catalytic co-pyrolysis of empty fruit bunch and high-density polyethylene mixtures over rice husk ash: thermogravimetric, kinetic and thermodynamic analyses Shahdan, Nadhilah Aqilah Balasundram, Vekes Ibrahim, Norazana Isha, Ruzinah Abdul Manan, Zainuddin Q Science (General) TP Chemical technology Rice husk ash (RHA) has been used as a catalyst precursor but there are lack of studies on the application of the resulting catalyst. This study allows researchers to have an insight on using RHA-sourced catalysts in pyrolysis and be encouraged to utilize waste materials in the future. The goal of this study is to examine the effect of catalysts derived from rice husk ash (RHA) using the solvent-free method, labelled as RHA-T, on the catalytic co-pyrolysis of empty fruit bunch (EFB) and high-density polyethylene (HDPE) via thermogravimetric analyser (TGA). Comparisons were then made with co-pyrolysis and catalytic co-pyrolysis over raw RHA and Hydrogen-exchanged Zeolite Socony Mobil-5 (HZSM-5). Thermogravimetric analysis was conducted (EFB-to-HDPE mass ratio of 1:1, catalyst-to-feedstock mass ratio of 1:1) in a nitrogen atmosphere, where samples were heated from 30 °C until 700 °C (heating rate 20 °C/min). The order of runs with highest mass loss in the second phase is as follows, with the term ‘BP’ indicating the biomass-plastic feedstock: BP-RHA-T (98.17 wt%), BP-RHA (96.25 wt%), BP (86.82 wt%) and BP-HZSM-5 (70.59 wt%). Kinetic analysis using Coats-Redfern method and comparing between different diffusional reaction models showed that using BP-RHA-T follows a one-dimensional diffusion reaction, similar to the non-catalytic run. Using RHA-T resulted in higher activation energy (83.03 kJ/mol to 84.91 kJ/mol) compared to the non-catalytic run (62.39 kJ/mol to 68.97 kJ/mol). Thermodynamic analysis showed the pyrolysis runs were endothermic and non-spontaneous. Using RHA-T resulted in a higher change of enthalpy, a lower change of Gibbs free energy and a less negative change of entropy. It can be concluded that applying catalysts synthesized using low-cost materials like RHA can improve the degradation of EFB and HDPE via pyrolysis, compared to commercial HZSM-5 catalysts. Elsevier Ltd 2022-08 Article PeerReviewed application/pdf en http://eprints.utm.my/98650/1/VekesBalasundram2022_CatalyticCoPyrolysisofEmptyFruit.pdf Shahdan, Nadhilah Aqilah and Balasundram, Vekes and Ibrahim, Norazana and Isha, Ruzinah and Abdul Manan, Zainuddin (2022) Catalytic co-pyrolysis of empty fruit bunch and high-density polyethylene mixtures over rice husk ash: thermogravimetric, kinetic and thermodynamic analyses. Cleaner Engineering and Technology, 9 (NA). pp. 1-8. ISSN 2666-7908 http://dx.doi.org/10.1016/j.clet.2022.100538 DOI:10.1016/j.clet.2022.100538 |
| spellingShingle | Q Science (General) TP Chemical technology Shahdan, Nadhilah Aqilah Balasundram, Vekes Ibrahim, Norazana Isha, Ruzinah Abdul Manan, Zainuddin Catalytic co-pyrolysis of empty fruit bunch and high-density polyethylene mixtures over rice husk ash: thermogravimetric, kinetic and thermodynamic analyses |
| title | Catalytic co-pyrolysis of empty fruit bunch and high-density polyethylene mixtures over rice husk ash: thermogravimetric, kinetic and thermodynamic analyses |
| title_full | Catalytic co-pyrolysis of empty fruit bunch and high-density polyethylene mixtures over rice husk ash: thermogravimetric, kinetic and thermodynamic analyses |
| title_fullStr | Catalytic co-pyrolysis of empty fruit bunch and high-density polyethylene mixtures over rice husk ash: thermogravimetric, kinetic and thermodynamic analyses |
| title_full_unstemmed | Catalytic co-pyrolysis of empty fruit bunch and high-density polyethylene mixtures over rice husk ash: thermogravimetric, kinetic and thermodynamic analyses |
| title_short | Catalytic co-pyrolysis of empty fruit bunch and high-density polyethylene mixtures over rice husk ash: thermogravimetric, kinetic and thermodynamic analyses |
| title_sort | catalytic co pyrolysis of empty fruit bunch and high density polyethylene mixtures over rice husk ash thermogravimetric kinetic and thermodynamic analyses |
| topic | Q Science (General) TP Chemical technology |
| url | http://eprints.utm.my/98650/1/VekesBalasundram2022_CatalyticCoPyrolysisofEmptyFruit.pdf |
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