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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/1973
Title: Global degradation kinetics of pine needles in air
Authors: Safi M.J.
Mishra I.M.
Prasad, Basheshwar Rajendra
Published in: Thermochimica Acta
Abstract: Pine needles are available in large quantities in the hilly region of Himalayas in India. Pine needles have good energy potential for exploitation through pyrolysis and gasification. This paper deals with the thermal degradation characteristics of pine needles and its kinetics. Thermal degradation analysis has been done by using a thermogravimetric analyzer from room temperature to 900°C in air atmosphere at different heating rates, viz. 5, 10, 15, 25 and 30Kmin-1. The TGA, DTG and DTA curves exhibited four distinct degradation zones. However, at the low heating rate of 5Kmin -1, only three degradation zones were found. The second, third and fourth zones had higher values of activation energy than the first zone. The kinetic parameters were determined by using several methods proposed in the literature assuming single step, irreversible reaction for a particular zone. Agrawal and Sivasubramanian [AIChE J. 33 (1987) 6] method was found to be most consistent. For the total degradation zone the orders of reaction were found in the range of 0.00-2.50 by using Agrawal and Sivasubramanian [AIChE J. 33 (1987) 6] approximation, the activation energy in the range of 34.60-85.34kJmol -1 and the preexponential factor in the range of 3.29×10 4 to 5.98×106mg1-nmin-1. The relative simplicity of the model gives it the potential for applications in the design of large scale biomass-pyrolysis facility in remote areas. © 2003 Elsevier B.V. All rights reserved.
Citation: Thermochimica Acta (2004), 412(43832): 155-162
URI: https://doi.org/10.1016/j.tca.2003.09.017
http://repository.iitr.ac.in/handle/123456789/1973
Issue Date: 2004
Keywords: Biomass
DTA
Kinetics
Oxidative degradation
Pine needles
TGA
ISSN: 406031
Author Scopus IDs: 57197905317
23668474600
15838004000
Author Affiliations: Safi, M.J., Department of Chemical Engineering, Indian Institute of Technology, Roorkee 247 667, India
Mishra, I.M., Department of Chemical Engineering, Indian Institute of Technology, Roorkee 247 667, India
Prasad, B., Department of Chemical Engineering, Indian Institute of Technology, Roorkee 247 667, India
Corresponding Author: Mishra, I.M.; Department of Chemical Engineering, Indian Institute of Technology, Roorkee 247 667, India; email: imishfch@iitr.ernet.in
Appears in Collections:Journal Publications [CH]

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