Abstract
We studied the reactivity of wood based hemicelluloses (beechwood xylan and poplar chips) in acid-catalyzed transglycosidation in decanol. Wood based hemicelluloses revealed to be more recalcitrant to transglycosidation than hemicelluloses from cereal origin (wheat straw, Oat spelt xylan). The chemical composition of the hemicelluloses, such as ash content or the level of arabinose and uronic acids in the polysaccharides structures, seems to influence the reactivity. The use of dimethylsulfoxide as solvent in the transglycosidation improved pentosides and glucosides yields for beechwood xylan, the more recalcitrant material. The surfactant properties of glycosides’ compositions produced from poplar were studied and compared to those of glycosides’ compositions obtained from pure monomeric carbohydrates or from wheat straw. The cellulose rich residue from poplar was hydrolyzed by concentrated acid saccharification yielding glucose in yields up to 55%.
Published Version
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