Treating birch wood with a switchable 1,8-diazabicyclo-[5.4.0]-undec-7-ene- glycerol carbonate ionic liquid

Ikenna Anugwom; Päivi Mäki-Arvela; Pasi Virtanen; Stefan Willför; Pia Damlin; Mattias Hedenström; Jyri Pekka Mikkola

doi:10.1515/hf-2011-0226

Treating birch wood with a switchable 1,8-diazabicyclo-[5.4.0]-undec-7-ene- glycerol carbonate ionic liquid

Ikenna Anugwom^*, Päivi Mäki-Arvela, Pasi Virtanen, Stefan Willför, Pia Damlin, Mattias Hedenström, Jyri Pekka Mikkola

^*Corresponding author for this work

Research output: Contribution to journal › Article › Scientific › peer-review

32 Citations (Scopus)

Abstract

The suitability of a new switchable ionic liquid (SIL) has been investigated as a solvent for fractionation of lignocellulosic materials. SIL was prepared from inexpensive chemicals, e.g., glycerol, CO₂, and 1,8-diazabicyclo-[5.4.0]- undec-7-ene (DBU). Fresh Nordic birch wood (B. pendula) was treated with the SIL for a time period of 1 - 5 days at 100 °C and under atmospheric pressure. Upon SIL treatment, at best, 57% of the hemicelluloses were dissolved and 50% of lignins were dissolved from the native birch. The slightly fibrillated SIL treated chips contained about 55% cellulose. Up to 76% of the recovered species removed from the spent SIL liquor was originating from hemicelluloses, mainly from xylan. The spent SILs were reused for fresh wood dissolution in four consecutive cycles and each time the wood dissolution efficiency was similar. SILs could offer affordable (easyto- synthesize) solvent systems for partial elimination of hemicelluloses and lignin from wood. SILs can also be prepared in-situ and on-site.

Original language	English
Pages (from-to)	809-815
Number of pages	7
Journal	Holzforschung
Volume	66
Issue number	7
DOIs	https://doi.org/10.1515/hf-2011-0226
Publication status	Published - 2012
MoE publication type	A1 Journal article-refereed

Keywords

Fractionation of lignocellulose
Recovery of dissolved lignocelluloses
Reuse of spent SIL
Switchable ionic liquids (SILs)
Treatment time

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10.1515/hf-2011-0226

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title = "Treating birch wood with a switchable 1,8-diazabicyclo-[5.4.0]-undec-7-ene- glycerol carbonate ionic liquid",

abstract = "The suitability of a new switchable ionic liquid (SIL) has been investigated as a solvent for fractionation of lignocellulosic materials. SIL was prepared from inexpensive chemicals, e.g., glycerol, CO2, and 1,8-diazabicyclo-[5.4.0]- undec-7-ene (DBU). Fresh Nordic birch wood (B. pendula) was treated with the SIL for a time period of 1 - 5 days at 100 °C and under atmospheric pressure. Upon SIL treatment, at best, 57% of the hemicelluloses were dissolved and 50% of lignins were dissolved from the native birch. The slightly fibrillated SIL treated chips contained about 55% cellulose. Up to 76% of the recovered species removed from the spent SIL liquor was originating from hemicelluloses, mainly from xylan. The spent SILs were reused for fresh wood dissolution in four consecutive cycles and each time the wood dissolution efficiency was similar. SILs could offer affordable (easyto- synthesize) solvent systems for partial elimination of hemicelluloses and lignin from wood. SILs can also be prepared in-situ and on-site.",

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AU - Virtanen, Pasi

AU - Willför, Stefan

AU - Damlin, Pia

AU - Hedenström, Mattias

AU - Mikkola, Jyri Pekka

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Treating birch wood with a switchable 1,8-diazabicyclo-[5.4.0]-undec-7-ene- glycerol carbonate ionic liquid

Abstract

Keywords

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