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Non-isothermal kinetic analysis of oil palm empty fruit bunch pellets by thermogravimetric analysis

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

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Official URL: http://dx.doi.org/10.3303/CET1545222


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.

Item Type:Article
Uncontrolled Keywords:activation energy, decomposition, fruits
Subjects:N Fine Arts > NA Architecture > NA9000-9284 City planning
Divisions:Built Environment
ID Code:58650
Deposited By: Haliza Zainal
Deposited On:04 Dec 2016 04:07
Last Modified:02 Dec 2021 06:07

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