Non-isothermal kinetic analysis of oil palm empty fruit bunch pellets by thermogravimetric analysis
The pyrolysis kinetics of oil palm empty fruit bunch (OPEFB) pellets was examined under non-isothermal conditions in a thermogravimetric (TG) analyser. Thermal analysis was carried out from 30 °C to 1,000 °C using three different heating rates 5, 10, 20 °C min-1 under nitrogen gas (N2). The TG-DTG c...
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| Format: | Article |
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Italian Association of Chemical Engineering - AIDIC
2015
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| _version_ | 1796860550750142464 |
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| author | Nyakuma, B. B. Ahmad, A. Johari, A. Abdullah, T. A. T. Oladokun, O. Aminu, D. Y. |
| author_facet | Nyakuma, B. B. Ahmad, A. Johari, A. Abdullah, T. A. T. Oladokun, O. Aminu, D. Y. |
| author_sort | Nyakuma, B. B. |
| collection | ePrints |
| description | The pyrolysis kinetics of oil palm empty fruit bunch (OPEFB) pellets was examined under non-isothermal conditions in a thermogravimetric (TG) analyser. Thermal analysis was carried out from 30 °C to 1,000 °C using three different heating rates 5, 10, 20 °C min-1 under nitrogen gas (N2). The TG-DTG curves showed that the pyrolysis process occurred in three steps; drying, active pyrolysis and passive pyrolysis signifying the removal of moisture, holocellulose and lignin. The pyrolysis kinetic parameters; activation energy, Ea, and frequency factor A, were deduced from the Flynn-Wall-Ozawa (FWO) model. The average Ea and A values from α = 0.10-0.60 were 160.20 kJ/mol and 1.38 × 1024 min-1. The highest Ea (231.42 kJ/mol) and A (8.27 × 1024 min-1) occurred at α = 0.30 indicating this is the slowest or rate determining step (RDS) during thermal degradation of OPEFB pellets. The average Ea for OPEFB pellets was comparably lower than cornstalk (206.40 kJ/mol), sawdust (232.60 kJ/mol) and oak (236.20 kJ/mol). The kinetic compensation or isokinetic effect was also observed during thermal decomposition of the OPEFB pellets. Hence, the results indicate OPEFB pellets can be utilized as a potential feedstock for pyrolysis. |
| first_indexed | 2024-03-05T19:43:03Z |
| format | Article |
| id | utm.eprints-58650 |
| institution | Universiti Teknologi Malaysia - ePrints |
| last_indexed | 2024-03-05T19:43:03Z |
| publishDate | 2015 |
| publisher | Italian Association of Chemical Engineering - AIDIC |
| record_format | dspace |
| spelling | utm.eprints-586502021-12-02T06:07:27Z http://eprints.utm.my/58650/ Non-isothermal kinetic analysis of oil palm empty fruit bunch pellets by thermogravimetric analysis Nyakuma, B. B. Ahmad, A. Johari, A. Abdullah, T. A. T. Oladokun, O. Aminu, D. Y. NA9000-9284 City planning The pyrolysis kinetics of oil palm empty fruit bunch (OPEFB) pellets was examined under non-isothermal conditions in a thermogravimetric (TG) analyser. Thermal analysis was carried out from 30 °C to 1,000 °C using three different heating rates 5, 10, 20 °C min-1 under nitrogen gas (N2). The TG-DTG curves showed that the pyrolysis process occurred in three steps; drying, active pyrolysis and passive pyrolysis signifying the removal of moisture, holocellulose and lignin. The pyrolysis kinetic parameters; activation energy, Ea, and frequency factor A, were deduced from the Flynn-Wall-Ozawa (FWO) model. The average Ea and A values from α = 0.10-0.60 were 160.20 kJ/mol and 1.38 × 1024 min-1. The highest Ea (231.42 kJ/mol) and A (8.27 × 1024 min-1) occurred at α = 0.30 indicating this is the slowest or rate determining step (RDS) during thermal degradation of OPEFB pellets. The average Ea for OPEFB pellets was comparably lower than cornstalk (206.40 kJ/mol), sawdust (232.60 kJ/mol) and oak (236.20 kJ/mol). The kinetic compensation or isokinetic effect was also observed during thermal decomposition of the OPEFB pellets. Hence, the results indicate OPEFB pellets can be utilized as a potential feedstock for pyrolysis. Italian Association of Chemical Engineering - AIDIC 2015 Article PeerReviewed Nyakuma, B. B. and Ahmad, A. and Johari, A. and Abdullah, T. A. T. and Oladokun, O. and Aminu, D. Y. (2015) Non-isothermal kinetic analysis of oil palm empty fruit bunch pellets by thermogravimetric analysis. Chemical Engineering Transactions, 45 . pp. 1327-1332. ISSN 2283-9216 http://dx.doi.org/10.3303/CET1545222 DOI: 10.3303/CET1545222 |
| spellingShingle | NA9000-9284 City planning Nyakuma, B. B. Ahmad, A. Johari, A. Abdullah, T. A. T. Oladokun, O. Aminu, D. Y. Non-isothermal kinetic analysis of oil palm empty fruit bunch pellets by thermogravimetric analysis |
| title | Non-isothermal kinetic analysis of oil palm empty fruit bunch pellets by thermogravimetric analysis |
| title_full | Non-isothermal kinetic analysis of oil palm empty fruit bunch pellets by thermogravimetric analysis |
| title_fullStr | Non-isothermal kinetic analysis of oil palm empty fruit bunch pellets by thermogravimetric analysis |
| title_full_unstemmed | Non-isothermal kinetic analysis of oil palm empty fruit bunch pellets by thermogravimetric analysis |
| title_short | Non-isothermal kinetic analysis of oil palm empty fruit bunch pellets by thermogravimetric analysis |
| title_sort | non isothermal kinetic analysis of oil palm empty fruit bunch pellets by thermogravimetric analysis |
| topic | NA9000-9284 City planning |
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