TY - JOUR
T1 - Choline chloride-based deep eutectic solvents for efficient delignification of Bambusa bambos in bio-refinery applications
AU - Ramesh, Remi
AU - Nair, Arya
AU - Jayavel, Aakash
AU - Sathiasivan, Kiruthika
AU - Rajesh, Mathur
AU - Ramaswamy, Shri
AU - Tamilarasan, Krishnamurthi
N1 - Publisher Copyright:
© 2020, Institute of Chemistry, Slovak Academy of Sciences.
PY - 2020/12/1
Y1 - 2020/12/1
N2 - The use of choline chloride–oxalic acid (CO) and choline chloride–urea (CU) green solvents as mediator for delignification of Bambusa bambos stem (BS) has been studied. The optimal delignification of BS obtained at 120 °C and 4 h of DESs (deep eutectic solvents) treatment process. The morphological structure of raw BS and treated BS was analyzed by SEM, XRD, and FTIR. The results showed that the crystallinity index increased from 43.8 in raw BS, to 44.3%, and CUT-BS and 46.4 in COT-BS. The surface elemental composition of BS was estimated by photoelectron spectroscopy (XPS). The carbon and oxygen elemental contents in the biomass surface were determined by XPS survey, C1s, and O1s spectra. The delignification using CO system (25.4%) more easily digested the BS biomass compared to CU system (19.4%). The use of acid DES can be an effective pretreatment process compared to basic treatment processes for biomass fractionation in bio-refinery applications.
AB - The use of choline chloride–oxalic acid (CO) and choline chloride–urea (CU) green solvents as mediator for delignification of Bambusa bambos stem (BS) has been studied. The optimal delignification of BS obtained at 120 °C and 4 h of DESs (deep eutectic solvents) treatment process. The morphological structure of raw BS and treated BS was analyzed by SEM, XRD, and FTIR. The results showed that the crystallinity index increased from 43.8 in raw BS, to 44.3%, and CUT-BS and 46.4 in COT-BS. The surface elemental composition of BS was estimated by photoelectron spectroscopy (XPS). The carbon and oxygen elemental contents in the biomass surface were determined by XPS survey, C1s, and O1s spectra. The delignification using CO system (25.4%) more easily digested the BS biomass compared to CU system (19.4%). The use of acid DES can be an effective pretreatment process compared to basic treatment processes for biomass fractionation in bio-refinery applications.
KW - Crystallinity index
KW - Delignification
KW - Elemental composition
KW - Green solvent
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U2 - 10.1007/s11696-020-01259-2
DO - 10.1007/s11696-020-01259-2
M3 - Article
AN - SCOPUS:85087367368
SN - 0366-6352
VL - 74
SP - 4533
EP - 4545
JO - Chemical Papers
JF - Chemical Papers
IS - 12
ER -