Choline chloride-based deep eutectic solvents for efficient delignification of Bambusa bambos in bio-refinery applications

Remi Ramesh, Arya Nair, Aakash Jayavel, Kiruthika Sathiasivan, Mathur Rajesh, Shri Ramaswamy, Krishnamurthi Tamilarasan

Research output: Contribution to journalArticle

Abstract

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.

Original languageEnglish (US)
Pages (from-to)4533-4545
Number of pages13
JournalChemical Papers
Volume74
Issue number12
DOIs
StateAccepted/In press - 2020

Keywords

  • Crystallinity index
  • Delignification
  • Elemental composition
  • Green solvent

Fingerprint Dive into the research topics of 'Choline chloride-based deep eutectic solvents for efficient delignification of Bambusa bambos in bio-refinery applications'. Together they form a unique fingerprint.

  • Cite this