Transformation of lignocellulosic biomass during torrefaction

Junyeong Park, Jiajia Meng, Kwang Hun Lim, Orlando J. Rojas, Sunkyu Park*

*Corresponding author for this work

    Research output: Contribution to journalArticleScientificpeer-review

    115 Citations (Scopus)

    Abstract

    In this study, the effect of torrefaction on the chemical and structural transformation of lignocellulosic biomass was investigated using complementary analytical tools. It was observed that the acid-insoluble fraction was increased from approximately 30 to 38% and the methoxyl content was decreased to about half after torrefaction at 330 degrees C for 2.5 min. These results highlight the formation of condensed structures along with lignin transformation via demethoxylation. Solid-state NMR spectroscopy indicated that upon torrefaction the aromaticity increased from about 36 to 60%. For the sample torrefied at 330 degrees C, the non-protonated aromatic carbon fraction was found to be about 60% of total aromatic carbons, indicating the formation of large aromatic clusters. The complementary analyses used in this study are proposed as a suitable approach for the elucidation of chemical and structural transformation of biomass during thermal treatment. (C) 2013 Published by Elsevier B.V.

    Original languageEnglish
    Pages (from-to)199-206
    Number of pages8
    JournalJournal of Analytical and Applied Pyrolysis
    Volume100
    DOIs
    Publication statusPublished - Mar 2013
    MoE publication typeA1 Journal article-refereed

    Keywords

    • Lignocellulosic biomass
    • Torrefaction
    • Solid-state NMR
    • Non-protonated aromatic carbon
    • Methoxyl content analysis
    • NUCLEAR-MAGNETIC-RESONANCE
    • COMBUSTIBLE PROPERTIES
    • FAST-PYROLYSIS
    • BLACK CARBON
    • WOOD
    • SPECTROSCOPY
    • LIGNIN
    • NMR
    • CELLULOSE
    • GRINDABILITY

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