Hydrothermal conversion of wood, organosolv, and chlorite pulps

In this work, beech wood has been submitted to fractionation and hydrothermal liquefaction in order to produce fermentable carbohydrates. Fractionation either by ethanol organosolv or by sodium chlorite/acetic acid (SC/AA) treatment allowed obtaining delignification yields of 50 and 91 wt.% respecti...

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Bibliographic Details
Published in:Biomass conversion and biorefinery 2020-03, Vol.10 (1), p.1-13
Main Authors: Buendia-Kandia, Felipe, Brosse, Nicolas, Petitjean, Dominique, Mauviel, Guillain, Rondags, Emmanuel, Guedon, Emmanuel, Dufour, Anthony
Format: Article
Language:English
Subjects:
Acetic acid
Anion exchanging
Beech
Biotechnology
Carbohydrates
Chemical and Process Engineering
Chemical Sciences
Chromatography
Electrical measurement
Energy
Engineering Sciences
Ethanol
Fractionation
Gas chromatography
Liquefaction
Materials
Organic chemistry
Original Article
Renewable and Green Energy
Xylose
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Summary:In this work, beech wood has been submitted to fractionation and hydrothermal liquefaction in order to produce fermentable carbohydrates. Fractionation either by ethanol organosolv or by sodium chlorite/acetic acid (SC/AA) treatment allowed obtaining delignification yields of 50 and 91 wt.% respectively. The recovered pulps were then submitted to liquefaction in hot-compressed water (HCW). Three temperatures were studied: 180, 200, and 220 °C during 2 h. The same experiments were conducted on untreated beech and model cellulose (Avicel PH-101). Product yields and total carbohydrates were determined. The liquefaction products, i.e., solid residue, water-soluble compounds, and permanent gas, were analyzed respectively by X-ray diffraction (XRD), high-performance anion-exchange chromatography with pulsed amperometric detector (HPAEC-PAD), and gas chromatography (GC). SC/AA treatment allowed a high recovery of hemicelluloses and for this reason, xylose content was significantly higher than for the organosolv pulp. The maximum yields of total carbohydrates (based on the initial carbohydrates in wood), found when the liquefaction temperature was 220 °C, increased from 9.0 wt.% for the raw beech to 13.5 and 33.7 wt.% for the organosolv and SC/AA pulps respectively.
ISSN:2190-6815
2190-6823
DOI:10.1007/s13399-019-00395-4