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  Fractionation of ‘water-soluble lignocellulose’ into C5/C6 sugars and sulfur-free lignins

Käldström, M., Meine, N., Farès, C., Rinaldi, R., & Schüth, F. (2014). Fractionation of ‘water-soluble lignocellulose’ into C5/C6 sugars and sulfur-free lignins. Green Chemistry, 16(5), 2454-2462. doi:10.1039/C4GC00168K.

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Käldström, Mats1, Author              
Meine, Niklas2, Author              
Farès, Christophe3, Author              
Rinaldi, Roberto1, Author              
Schüth, Ferdi2, Author              
Affiliations:
1Research Group Rinaldi, Max-Planck-Institut für Kohlenforschung, Max Planck Society, ou_1445617              
2Research Department Schüth, Max-Planck-Institut für Kohlenforschung, Max Planck Society, ou_1445589              
3Service Department Farès (NMR), Max-Planck-Institut für Kohlenforschung, Max Planck Society, ou_1445623              

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 Abstract: Recently, we demonstrated the mechanocatalytic depolymerization of lignocellulosic substrates as a powerful methodology that fully converts lignocellulosic substrates into ‘water-soluble lignocellulose’. We now show that the saccharification of the aqueous solution of depolymerized beechwood, pinewood and sugarcane bagasse (at 140 °C for 1 h) produces a high yield of sugars (e.g. 88–92% glucose, 3.5–8% glucose dimers and 93–98% xylose relative to the glucan and xylan fractions, respectively) and leads to precipitation of sulfur-free lignins. Noteworthy, the formation of furfurals is suppressed because the ‘water-soluble lignocelluloses’ undergo hydrolysis at relatively low temperatures. At 140 °C, 5-hydroxymethylfurfural and furfural are formed in yields not exceeding 1.4 and 5.7%, respectively. The separation of the carbohydrate fraction (as C5 and C6 sugars) from the lignin fraction is thus feasible by simple filtration.

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Language(s): eng - English
 Dates: 2014-01-302014-02-032014-02-042014-05-01
 Publication Status: Published in print
 Pages: 9
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1039/C4GC00168K
 Degree: -

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Title: Green Chemistry
  Other : Green Chem.
Source Genre: Journal
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Publ. Info: Cambridge, UK : Royal Society of Chemistry
Pages: - Volume / Issue: 16 (5) Sequence Number: - Start / End Page: 2454 - 2462 Identifier: ISSN: 1463-9262
CoNE: https://pure.mpg.de/cone/journals/resource/954925625301