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Research Papers: Fuel Combustion

Physicochemical Characterization and Pyrolysis Kinetic Study of Sugarcane Bagasse Using Thermogravimetric Analysis

[+] Author and Article Information
Anil Kumar Varma

Department of Chemical Engineering,
Indian Institute of Technology Roorkee,
Roorkee, Uttarakhand 247667, India
e-mail: vermaanil7@gmail.com

Prasenjit Mondal

Department of Chemical Engineering,
Indian Institute of Technology Roorkee,
Roorkee, Uttarakhand 247667, India
e-mail: pmpndal.iitr@gmail.com

1Corresponding author.

Contributed by the Advanced Energy Systems Division of ASME for publication in the JOURNAL OF ENERGY RESOURCES TECHNOLOGY. Manuscript received July 20, 2015; final manuscript received December 24, 2015; published online March 10, 2016. Assoc. Editor: Yiannis Levendis.

J. Energy Resour. Technol 138(5), 052205 (Mar 10, 2016) (11 pages) Paper No: JERT-15-1264; doi: 10.1115/1.4032729 History: Received July 20, 2015; Revised December 24, 2015

The present study was conducted to investigate the physicochemical properties and pyrolysis kinetics of sugarcane bagasse (SB). The physiochemical properties of SB were determined to examine its potential for pyrolysis. The physiochemical properties such as proximate analysis, ultimate analysis, heating values, lignocellulosic composition, X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR) of SB were investigated. The pyrolysis experiments were conducted in a nonisothermal thermogravimetric analyzer (TGA) to understand the thermal degradation behavior of SB. The activation energy (Ea) of SB pyrolysis was calculated by model-free Kissinger–Akahira–Sunose (KAS) and Ozawa–Flynn–Wall (OFW) methods. Average values of activation energy determined through KAS and OFW methods are found as 91.64 kJ/mol and 104.43 kJ/mol, respectively. Variation in the activation energy with degree of conversion was observed, which shows that pyrolysis is a complex process composed of several reactions. Coats–Redfern method was used to calculate the pre-exponential factor and reaction order. Conversion of SB due to heat treatment computed by using the kinetic parameters is found to be in good agreement with the experimental conversion data, and the maximum error limit between the experimental and predicted conversions is 8.5% for 5 °C/min, 6.0% for 10 °C/min, and 11.6% for 20 °C/min. The current investigation proves the suitability of SB as a potential feedstock for pyrolysis.

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Figures

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Fig. 1

Photograph of SB (a) before grinding and (b) after grinding

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Fig. 3

FTIR spectra of SB

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Fig. 4

TG/DTG curves of SB at a heating rate of 10 °C/min

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Fig. 5

Kinetic plots for SB using (a) KAS method and (b) OFW method

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Fig. 6

Variations in activation energy with conversion for KAS and OFW methods

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Fig. 7

Activation energy of different biomass computed through (a) KAS method and (b) OFW method at different conversion

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Fig. 8

Conversion curves of SB at different heating rates

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Fig. 9

Simulation of SB pyrolysis using the kinetic data (n = 10) calculated for (a) 5 °C/min, (b) 10 °C/min, and (c) 20 °C/min

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