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Journal of Renewable Energy
Volume 2015 (2015), Article ID 307329, 8 pages
Research Article

The Study of Kinetic Properties and Analytical Pyrolysis of Coconut Shells

1Department of Mechanical and Industrial Engineering, University of Dar es Salaam, Dar es Salaam, Tanzania
2Department of Chemical and Mining Engineering, University of Dar es Salaam, Dar es Salaam, Tanzania

Received 22 May 2015; Revised 29 July 2015; Accepted 5 August 2015

Academic Editor: Hasan Ferdi Gercel

Copyright © 2015 Mahir Said et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The kinetic properties of coconut shells during pyrolysis were studied to determine its reactivity in ground form. The kinetic parameters were determined by using thermogravimetric analyser. The activation energy was 122.780 kJ/mol. The pyrolysis products were analyzed using pyrolysis gas chromatography/mass spectrometry (Py-GC/MS). The effects of pyrolysis temperature on the distribution of the pyrolytic products were assessed in a temperature range between 673 K and 1073 K. The set time for pyrolysis was 2 s. Several compounds were observed; they were grouped into alkanes, acids, ethers and alcohols, esters, aldehydes and ketones, furans and pyrans, aromatic compounds, and nitrogen containing compounds. The product compositions varied with temperature in that range. The highest gas proportion was observed at high temperature while the acid proportion was observed to be highest in coconut shells, thus lowering the quality of bio-oil. It has been concluded that higher pyrolysis temperature increases the amount of pyrolysis products to a maximum value. It has been recommended to use coconut shell for production of gas, instead of production of bio-oil due to its high proportion of acetic acid.