Spatially resolved spectral determination of polysaccharides in hydrothermally carbonized biomass

Mikko Mäkelä*, Maurizio Volpe, Roberto Volpe, Luca Fiori, Olli Dahl

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

42 Citations (Scopus)
263 Downloads (Pure)


Reliable information on the decomposition of polysaccharides is important to evaluate the evolution and properties of hydrothermally carbonized chars. Hyperspectral imaging offers a quick and robust alternative to expensive and time-consuming laboratory methods to determine the polysaccharide contents of biomass and biomass-derived chars. Here, we show that the decomposition of hemicellulose and cellulose were visible in the acquired hyperspectral images even without image calibration. Image regression based on sample holocellulose, glucan and the sum of xylan, galactan, arabinan and mannan provided good calibration models and enabled visualizing the decomposition of polysaccharides based on carbonization temperature. Hyperspectral imaging thus provides a non-destructive alternative to traditional polysaccharide analyses of hydrochars for laboratory and potential future industrial applications.

Original languageEnglish
Pages (from-to)1114-1120
Number of pages7
JournalGreen Chemistry
Issue number5
Publication statusPublished - 2018
MoE publication typeA1 Journal article-refereed


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