Swaminathan, J. and Jayapal, P.R. and Asokan, M. and Ramasamy, D. (2015) Dilute acid pretreatment of sweet sorghum stalk and its characterization. International Journal of ChemTech Research, 8 (6). pp. 589-598.
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Abstract
Sweet sorghum, a promising low- cost lignocellulosic feedstock, is pretreated for the synthesis of microbe utilizable simple monomers that has an economic importance in the secondary biofuels production. The aim of the present study is the pretreatment of sweet sorghum stalk using different dilute acids for effective delignification and hydrolysis, to optimize the simple monomers yield by varying the acid concentrations and further analyze the chemical bonds breakdown in the pretreated stalk through structural and morphological characterization by comparing with untreated sweet sorghum stalk as control. Sweet Sorghum (SS) stalk was pretreated with different acids such as HCl and H2SO4 at different concentrations ranging from 0.5% (v/v) to 3% (v/v) to optimize the simple sugars yield. The maximum sugar yield was obtained at 1% (v/v) HCl pretreated SS stalk hydrolysate. Structural and morphological characterizations of the pretreated and untreated SS stalk were carried out using FT-IR and SEM respectively. During FT-IR analysis, the chemical bonds present in the hemicellulose were completely broken down in the pretreated SS stalk which was inferred by comparing with untreated SS stalk. SEM micrographs revealed that the lengthier microfibrils structure of the biomass network was disrupted resulting in the formation of more holes on the annular rings and on the cellulose wall which were the internal structure of the biomass network. This study reveals out the structural composition and monomeric yield during dilute acid pretreatment of SS stalk. Keywords: Sweet sorghum stalk, pretreatment, dilute acids, FT-IR, SEM.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Characterization,biofuels, sweet sorghum, renewable energy |
| Author Affiliation: | Bioprocess Laboratory, Department of Chemical Engineering, Annamalai University, Annamalai Nagar - 608 002, Tamil Nadu, India |
| Subjects: | Plant Production |
| Divisions: | Sorghum |
| Depositing User: | Mr T L Gautham |
| Date Deposited: | 04 Dec 2015 08:48 |
| Last Modified: | 04 Dec 2015 08:48 |
| URI: | http://eprints.icrisat.ac.in/id/eprint/14074 |
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