Structural features of lignin-rich solid residues obtained from two-step acid-hydrolysis of Miscanthus biomass (Miscanthus sacchariflorus Benth.)

다국어 초록 (Multilingual Abstract)

Miscanthus was subjected to two-step hydrolysis under different concentrations of sulfuric-acid (first-step: 72–18%; second-step: 36 2%) for conversion to monomeric sugars and lignin-rich solid residues.
Compared to native lignin isolated from Miscanthus, there were obvious reductions of phenolichydroxyl(0.5–2.6% vs. 5.9%) and methoxyl groups(3.0–13.9% vs. 16.5%) in solid residues. TGA confirmedthat thermal stability of solid residues was proportional to greater abundance of condensed ligninstructures and inversely proportional to remaining carbohydrate amount. Py-GC/MS revealed that sum oflignin derivatives (H-,G-,S-type phenols) amounted to 23–76% of the levels of MWL, meaning that ligninsin solid residues seem to be highly condensed.

참고문헌 (Reference)

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