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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Italian Association of Chemical Engineering - AIDIC
2015
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my.utm.586502021-12-02T06:07:27Z http://eprints.utm.my/id/eprint/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 |
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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 |
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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. |
| format |
Article |
| 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. |
| title |
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_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_sort |
non-isothermal kinetic analysis of oil palm empty fruit bunch pellets by thermogravimetric analysis |
| publisher |
Italian Association of Chemical Engineering - AIDIC |
| publishDate |
2015 |
| url |
http://eprints.utm.my/id/eprint/58650/ http://dx.doi.org/10.3303/CET1545222 |
| _version_ |
1718926033647828992 |
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13.211869 |