Understanding the effect of low-concentrated protic ionic liquids (PILs) on coconut (Cocos nucifera) residues

Gundupalli, M.P. and Bano, K. and Panda, Tarun K and Sriariyanun, M. and Bhattacharyya, Debraj (2022) Understanding the effect of low-concentrated protic ionic liquids (PILs) on coconut (Cocos nucifera) residues. Biomass Conversion and Biorefinery. ISSN 2190-6815

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Concentrated protic ionic liquid (PIL) without dilution has increased saccharification efficiency due to the solubilization of hemicellulose and lignin compounds. However, concentrated PILs are not cost-effective, highly viscous, and toxic to microorganisms. The present study evaluates the effect of PILs on the solubilization of hemicellulose and lignin present in coconut coir and pith. PILs including pyridinium hydrogen sulfate PyHHSO4 and triethylammonium hydrogen sulfate TEAHSO4 were considered in this study. The sugars and lignin were partially hydrolyzed during the PIL pretreatment of coir and pith. However, the degree of biomass solubilization varied for different types of biomass and PIL. The changes in the biomass after pretreatment were studied through FTIR and XRD analysis. The yield of glucose released from PyHHSO4 and TEAHSO4 pretreated coir and pith increased 4.12, 4.73 and 7.36, and 6.44, respectively. The results showed that diluted PIL could be used in a biorefinery to increase the glucose yield with almost similar efficiency obtained from concentrated PIL. The recovery and reusability studies showed the recycled PIL could be utilized 3 times. Further application of low concentrations of PIL suggests the possibility of a new process design for a biorefinery to achieve low operating costs. Graphical abstractFigure not available: see fulltext. © 2022, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.

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IITH Creators:
IITH CreatorsORCiD
Panda, Tarun Khttp://orcid.org/0000-0003-0975-0118
Bhattacharyya, DebrajUNSPECIFIED
Item Type: Article
Additional Information: The Ministry of Human Resource Development (India) and the Department of Science and Technology (India) funded and supported this work under FAST and FIST programs, respectively. Malinee Sriariyanun was supported by King Mongkut’s University of Technology North Bangkok (Contract No. KMUTNB-FF-65–37).
Uncontrolled Keywords: Coconut, Low concentration, Pretreatment, Protic ionic liquid, Recycle, Saccharification
Subjects: Chemistry
Civil Engineering
Chemical Engineering
Divisions: Department of Chemistry
Department of Civil Engineering
Depositing User: . LibTrainee 2021
Date Deposited: 22 Jul 2022 05:10
Last Modified: 22 Jul 2022 05:10
URI: http://raiith.iith.ac.in/id/eprint/9857
Publisher URL: https://doi.org/10.1007/s13399-022-02572-4
OA policy: https://v2.sherpa.ac.uk/id/publication/21696
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