Study of thermal behavior of deoiled karanja seed cake biomass: thermogravimetric analysis and pyrolysis kinetics

Muktham, R, Ball, A, Bhargava, S and Bankupalli, S 2016, 'Study of thermal behavior of deoiled karanja seed cake biomass: thermogravimetric analysis and pyrolysis kinetics', Energy Science and Engineering, vol. 4, no. 1, pp. 86-95.


Document type: Journal Article
Collection: Journal Articles

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Title Study of thermal behavior of deoiled karanja seed cake biomass: thermogravimetric analysis and pyrolysis kinetics
Author(s) Muktham, R
Ball, A
Bhargava, S
Bankupalli, S
Year 2016
Journal name Energy Science and Engineering
Volume number 4
Issue number 1
Start page 86
End page 95
Total pages 10
Publisher John Wiley and Sons
Abstract Karanja is a medium sized evergreen tree which has minor economic importance in India. The nonedible seed kernel contains 27-30% oil that is used for biodiesel production, leaving the remaining nonedible seed cake as a waste product. The aim of the present work was to obtain kinetic parameters in relation to technological parameters in nonedible seed cake biomass pyrolysis conversion process to bio-oil and biochar. Effects of heating rate on karanja seed cake slow pyrolysis behavior and kinetic parameters were investigated at heating rates of 5, 10, and 20°C/min using thermogravimetric analysis (TGA). Thermogravimetric experiments showed the onset and offset temperatures of the devolatilization step shifted toward the high-temperature range, and the activation energy values increased with increasing heating rate. In the present study, isoconversional method was applied for the pyrolysis of karanja seed cake biomass by TGA and the activation energies (118-124 kJ/mol) and the pre-exponential factors obtained using progressive conversion. Proximate-ultimate analyses, energy value, surface structure, and Fourier transform infrared spectra of the biomass processed under conditions were reported. The pyrolysis resulted in upgradation of the energy value of seed cake biomass from 18.1 to 24.5 MJ/kg; importantly with high carbon and low oxygen contents. The approach represents a novel method for the upgrading of karanja seed cake that has significant commercial potential.
Subject Chemical Sciences not elsewhere classified
Keyword(s) Biochar
Karanja cake
Kinetics
Pyrolysis
TGA
DOI - identifier 10.1002/ese3.109
Copyright notice © 2016 The Authors. Energy Science & Engineering published by the Society of Chemical Industry and John Wiley & Sons Ltd. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
ISSN 2050-0505
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