Current Trends in Pretreatment Technologies for Bioethanol Production: Biorefinery Concept

Aggarwal, Neeraj; Kumar, Naveen; Mittal, Mahak

doi:10.1007/978-3-031-05091-6_3

Cited by 1 publication

(1 citation statement)

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“…This is very attractive for many chemical applications and is now widely accepted as a non-conventional energy source for performing organic synthesis as shown by the increasing number of related publications in recent years and with the general availability of new and reliable microwave instrumentation [14]. Microwave heating has been successfully applied in biomass pretreatments where in addition to the heating process it causes swelling and fragmentation [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Microwave-assisted hydrothermal processing of pine nut shells for oligosaccharide production

Torrado,

Neves,

da Conceição Fernandes

et al. 2024

Biomass Conv. Bioref.

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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 xylo-oligosaccharides) 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.

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