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Microwave-assisted hydrothermal processing of pine nut shells for oligosaccharide production
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Orientador(es)
Resumo(s)
Pine nut shells, a biomass residue from the Mediterranean Pinus pinea pine nut industrial processing, were treated by microwave-
assisted autohydrolysis to produce xylo-oligosaccharides. Microwave-assisted processes provide alternative heating
that may reduce energy input and increase overall process efficiency. The autohydrolysis treatments were performed under
isothermal and non-isothermal operations within a wide range of operational conditions (temperature/reaction times) covering
several severity regimes (as measured by the log R0 severity factor). The composition of the autohydrolysis liquors was
determined in terms of oligo- and monosaccharides, aliphatic acids and degradation compounds. The process was highly
selective towards hemicelluloses hydrolysis and liquid streams containing a mixture of oligomeric compounds (mainly xylooligosaccharides)
could be obtained under relatively mild operation conditions (190 °C, 30 min) with a maximal oligosaccharides’
concentration of 18.48 g/L. The average polymerization degree of the obtained oligosaccharides was characterised
by HPLC, showing that for the optimal conditions a mixture of oligomers with DPs from 2 to 6.
Descrição
Palavras-chave
biorefineries fractionation hemicelluloses microwave heating Pinus pinae severity factor
Contexto Educativo
Citação
Torrado, Ivone, et al. “Microwave-Assisted Hydrothermal Processing of Pine Nut Shells for Oligosaccharide Production.” Biomass Conversion and Biorefinery, vol. 14, no. 17, Sept. 2024, pp. 20751–60
Editora
Springer