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- Anugwom, Ikenna (author)
Switchable ionic liquids as delignification solvents for lignocellulosic materials
- Article/chapterEnglish2014
Publisher, publication year, extent ...
- 2014-03-11
- John Wiley & Sons,2014
- printrdacarrier
Numbers
- LIBRIS-ID:oai:DiVA.org:umu-87822
- https://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-87822URI
- https://doi.org/10.1002/cssc.201300773DOI
Supplementary language notes
- Language:English
- Summary in:English
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- SwePubSwePub
Classification
Notes
- The transformation of lignocellulosic materials into potentially valuable resources is compromised by their complicated structure. Consequently, new economical and feasible conversion/fractionation techniques that render value-added products are intensely investigated. Herein an unorthodox and feasible fractionation method of birch chips (B. pendula) using a switchable ionic liquid (SIL) derived from an alkanol amine (monoethanol amine, MEA) and an organic super base (1,8-diazabicyclo-[5.4.0]-undec-7-ene, DBU) with two different trigger acid gases (CO2 and SO2 ) is studied. After SIL treatment, the dissolved fractions were selectively separated by a step-wise method using an antisolvent to induce precipitation. The SIL was recycled after concentration and evaporation of anti-solvent. The composition of undissolved wood after MEA-SO2 -SIL treatment resulted in 80 wt % cellulose, 10 wt % hemicelluloses, and 3 wt % lignin, whereas MEA-CO2 -SIL treatment resulted in 66 wt % cellulose, 12 wt % hemicelluloses and 11 wt % lignin. Thus, the MEA-SO2 -SIL proved more efficient than the MEA-CO2 -SIL, and a better solvent for lignin removal. All fractions were analyzed by gas chromatography (GC), Fourier transform infrared spectroscopy (FT-IR), (13) C nuclear magnetic resonance spectroscopy (NMR) and Gel permeation chromatography (GPC).
Subject headings and genre
- NATURVETENSKAP Kemi hsv//swe
- NATURAL SCIENCES Chemical Sciences hsv//eng
- alkanol amines; biomass; delignification; ionic liquids; organic superbases
Added entries (persons, corporate bodies, meetings, titles ...)
- Eta, Valerie (author)
- Virtanen, Pasi (author)
- Mäki-Arvela, Päivi (author)
- Hedenström, MattiasUmeå universitet,Kemiska institutionen(Swepub:umu)mashem96 (author)
- Hummel, Michael (author)
- Sixta, Herbert (author)
- Mikkola, Jyri-PekkaUmeå universitet,Kemiska institutionen(Swepub:umu)jymi0001 (author)
- Umeå universitetKemiska institutionen (creator_code:org_t)
Related titles
- In:ChemSusChem: John Wiley & Sons7:4, s. 1170-11761864-56311864-564X
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