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ECN publication
Title:
Biorefining of wheat straw using an acetic and formic acid based organosolv fractionation process
 
Author(s):
Snelders, J.; Dornez, E.; Benjelloun-Mlayah, B.; Huijgen, W.J.J.; Wild, P.J. de; Gosselink, R.J.A.; Gerritsma, J.; Courtin, C.M.
 
Published by: Publication date:
ECN Biomass & Energy Efficiency 10-2-2014
 
ECN report number: Document type:
ECN-W--13-046 Article (scientific)
 
Number of pages:
10  

Published in: Bioresource Technology (Elsevier), , 2014, Vol.156, p.275-282.

Abstract:
To assess the potential of acetic and formic acid organosolv fractionation of wheat straw as basis of an integral biorefinery concept, detailed knowledge on yield, composition and purity of the obtained streams is needed. Therefore, the process was performed, all fractions extensively characterized and the mass balance studied. Cellulose pulp yield was 48% of straw dry matter, while it was 21% and 27% for the lignin and hemicellulose-rich fractions. Composition analysis showed that 67% of wheat straw xylan and 96% of lignin were solubilized during the process, resulting in cellulose pulp of 63% purity, containing 93% of wheat straw cellulose. The isolated lignin fraction contained 84% of initial lignin and had a purity of 78%. A good part of wheat straw xylan (58%) ended up in the hemicellulose-rich fraction, half of it as monomeric xylose, together with proteins (44%), minerals (69%) and noticeable amounts of acids used during processing.


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