2015-Sustainable Industrial Processing Summit
SIPS 2015 Volume 7: Ionic Liquids & Energy Production
| Editors: | Kongoli F, Gaune-Escard M, Mauntz M, Rubinstein J, Dodds H.L. |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2015 |
| Pages: | 310 pages |
| ISBN: | 978-1-987820-30-0 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
< CD shopping page
Switchable Ionic Liquid (SIL) Aided Deconstruction of Biomass and a Two- Step Recovery of Hemicellulose and Lignin and Cellulose
Ikenna Anugwom1; Jyri-Pekka Mikkola2;1UMEA UNIVERSITY SWEDEN, Umea, Sweden; 2ABO AKADEMI UNIVERSITY, Turku, Finland;
Type of Paper: Regular
Id Paper: 429
Topic: 13
Abstract:
Transformation of lignocellulosic material into potentially valuable resources is compromised by its complicated structure. Consequently, there is a clear need to develop new economical and feasible conversion/fractionation techniques that render value-added products. Herein, wood lignin and hemicelluloses were extracted from birch chips (B. pendula) using an alkanol amine (monoethanol amine, MEA) and an organic superbase (1,8-diazabicyclo-[5.4.0]-undec-7-ene, DBU) derived Switchable Ionic Liquid (SIL) triggered by SO2 (Scheme 1). The dissolved lignin and hemicelluloses were recovered from the spent SIL using a two-step recovery protocol using different organic solvents, targeting one compound at a time.
The dissolved materials from the SIL treatment of wood were selectively recovered by a step-wise method using an anti-solvent to induce precipitation. The treatment was carried out at 160°C for 2 hours in absence of any agitation. The SIL was recycled after concentration and evaporation of the added molecular solvents. All fractions were analyzed by gas chromatography (GC), Fourier transform infrared spectroscopy (FT-IR), 13C nuclear magnetic resonance spectroscopy (NMR) and Gel permeation chromatography (GPC). Selective extraction was demonstrated to obtain almost pure fractions cellulose, hemicellulose and lignin. The use of this simple two-step solvent extraction can be applied to recover dissolved fractions from the SIL.
Further studies from our group will focus on improving the recovery of the dissolved lignin and hemicelluloses as well as to quantify and further refine these materials to bio-chemicals and fuels.