The impact of ionic liquid pretreatment on the chemistry and enzymatic digestibility of Pinus radiata compression wood

Date

2012-01-01

Author

TORR, KIRK
LOVE, KAREN
Persil Çetinkol, Özgül
DONALDSON, LLOYD
GEORGE, ANTHE
HOLMES, BRADLEY
SIMMONS, BLAKE

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

137
views

0
downloads

Compression wood represents a unique challenge for biochemical processing of softwoods to biofuels and chemicals on account of its high lignin and galactan, and low glucan contents. Here we report the impact of ionic liquid pretreatment on the chemistry and enzymatic digestibility of Pinus radiata compression wood and opposite wood. Samples were pretreated using 1-ethyl-3-methylimidazolium acetate at 120 degrees C and 155 degrees C for 3 h. Hemicelluloses were preferentially extracted during the pretreatment and the recovered biomass was enriched in cellulose and lignin. The pretreatment caused structural modifications to the lignin and polysaccharides that included loss of ether linkages and formation of condensed structures in the lignin, reduced cellulose crystallinity and possible depolymerisation of polysaccharide chains. The enzymatic digestibility of the cellulose was significantly enhanced in both wood types after pretreatment. Approximately 90% of the glucan was converted to glucose after enzyme treatment for 24 h following pretreatment at 120 degrees C compared to only 3-8% in untreated samples. Because the ionic liquid pretreatment was equally effective on both compression wood and opposite wood the outcome of the saccharification was largely determined by the original chemical composition of the two wood types.

Subject Keywords

Cellulose crystallinity, Dilute-acid, Nmr, Ethanol, Lignin, Delignification, Conifers, Samples, Media, Biomass

URI

https://hdl.handle.net/11511/39804

Journal

GREEN CHEMISTRY

DOI

https://doi.org/10.1039/c2gc16362d

Collections

Department of Chemistry, Article

Suggestions

OpenMETU
Core

Combined effect of point defects and layer number on the adsorption of benzene and toluene on graphene Akay, Tugce Irfan; Toffoli, Daniele; Toffoli, Hande (Elsevier BV, 2019-06-30) Understanding the adsorption properties of organic molecules on graphene-based substrates is important for such applications as air and water filters. Pristine graphene is often the model substrate used in the theoretical investigations of this problem. While useful, pristine single-layer graphene is however an idealized model. In this work, we assess the effect of the presence of point defects (single vacancy, divacancy, and the Stone-Wales defect) in single-layer and bilayer graphene on the energetics of ...
The effects of pectin and wax on the characteristics of oil-in-water (O/W) emulsions Elik, Aysel; Koçak Yanik, Derya; Özel, Barış; Öztop, Halil Mecit; Fahrettin, G.ö.ğ.ü.ş. (2021-01-01) © 2021 Institute of Food Technologists®Abstract: The study was aimed to investigate characteristics of emulsion containing pectin, wax, maltodextrin, and carotenoid enriched flaxseed oil by means of stability, rheology, particle size, and low-resolution of time domain nuclear magnetic resonance (NMR) relaxometry measurements. Emulsions were prepared with different carotenoid enriched-flaxseed oil concentrations (6%, 9%, 12%, and 15% w/w) and ratios of maltodextrin/(pectin+wax) (3:1, 6:1, 9:1, and 12:1 g/g)....
A facile method for the recovery of ionic liquid and lignin from biomass pretreatment DIBBLE, DEAN; LI, CHENLIN; LAN, SUN; GEORGE, ANTHE; CHENG, AURELIA; Persil Çetinkol, Özgül; BENKE, PETER; HOLMES, BRADLEY; SINGH, SEEMA; SIMMONS, BLAKE (2011-01-01) In the biochemical conversion of lignocellulosic biomass to biofuels, the process of pretreatment is currently one of the most difficult and expensive operations. The use of ionic liquids (ILs) in biomass pretreatment has received considerable attention recently because of their effectiveness at decreasing biomass recalcitrance to subsequent enzymatic hydrolysis. In addition, ILs have the potential for decreasing the need for corrosive or toxic chemicals and associated waste streams that can be generated by...
Studies towards the preparation of functionalized cellulose microspheres with affinities towards negatively charged biomembranes Demirel, Kaan; Türkyılmaz, Serhan; Department of Chemistry (2021-7) Cellulose microspheres (CMs), generally with diameters in the 10-1000 µm range, have been used as stationary phases in chromatography, substrates for ion exchange applications, supports for protein immobilization and solid-phase synthesis, and drug loading and release materials. Furthermore, cellulose and CMs are biocompatible and have been used in many biomedical applications as varied as the dressing of wounds and blood filtration. Targeting of bacterial cells can be achieved using antibodies, antibody fr...
The effect of Halobacterium halobium on photoelectrochemical hydrogen production Sediroglu, V; Yucel, M; Gündüz, Ufuk; Turker, L; Eroğlu, İnci (1997-06-26) A bio-photoelectrochemical (bio-PEC) reactor containing the photosynthetic bacterium Halobacterium halobium has been constructed. H. halobium contains a retinal protein, bacteriorhodopsin, in its purple membrane that gives protons upon illumination. In this system, the biocatalytic effect of bacteriorhodopsin on photoelectrochemical hydrogen production was determined.

Citation Formats

K. TORR et al., “The impact of ionic liquid pretreatment on the chemistry and enzymatic digestibility of Pinus radiata compression wood,” GREEN CHEMISTRY, pp. 778–787, 2012, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/39804.