Positive transformations in intrinsic bioconstituents due to briquetting of soybean crop residues

Published Date
August 2015, Vol.27:112–119, doi:10.1016/j.esd.2015.05.005

Author 
Sandip Gangil ^,,,
Agricultural Energy and Power Division, Central Institute of Agricultural Engineering, Bhopal 462038, MP, India
Received 9 February 2015. Accepted 8 May 2015. Available online 28 May 2015. 

Highlights

• Intrinsic bioconstituent transformations due to briquetting critically were studied.
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  Positive biopolymeric consolidation due to briquetting stresses was proved.
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  Through deconvolution analysis, it was found that briquette was less reactive than raw material.

Abstract 

Thermogravimetric spectra of binderless briquettes and its raw material, soybean crop residues, were critically analyzed to ascertain the changes occurring in the intrinsic biopolymeric components such as hemicellulose, cellulose and lignin due to briquetting stresses. Transitions of thermogravimetric signals and activation energy levels were analyzed and discussed. The distinct and sharp signals related to the secondary charring process at the high temperature regime in thermogravimetry were noticed in briquettes as compared to these signals in raw residue. Integral isoconversional Friedman kinetics treatment was used to compute the conversion fraction dependent activation energies. Deconvolution analysis of differential thermograms was done to diagnose the internal thermogravimetric transformations. It established the lesser reactivity and better consolidation in case of briquetted biofuel.

Keywords

Thermogravimetry

Kinetics

Activation energy

Reactivity

Briquetted biofuel

Soybean crop residues

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