Comprehensive Study of the Thermal Decomposition of Different Hemicelluloses
Werner, K., Borén, E., Broström, M., Pommer, L.
Carbohydrates (cellulose and hemicellulose) constitute the main fraction of plant cell walls and detailed knowledge about their thermal decomposition are therefore of great importance for understanding pyrolytic degradation properties of biomass. Hemicellulose is a diverse group of non-cellulosic polysaccharides and is composed of chains of different monomeric sugar units (pentoses, hexoses and hexuronic acids). The heterogeneous structures of hemicelluloses should be considered when evaluating the decomposition behavior. Nevertheless, thermal analysis of hemicellulose often uses the commercially available xylan as a model compound of hemicelluloses. In contrast to previous work several polysaccharides (xylan arabinogalactan, galactomannan, xyloglucan, and cellulose) were thoroughly investigated in the current study by thermogravimetric analysis, differential scanning calorimetry and pyrolysis-gas chromatography/mass spectrometry during heating in inert atmosphere. The results gave new insights into hemicellulose decomposition and demonstrated that different hemicelluloses have different decompoition behavior.
biomass, cellulose, hemicellulose, pyrolysis
R&D on Biomass Conversion Technologies for Heating, Electricity and Chemicals
Pyrolysis and other biomass liquefaction technologies
21st European Biomass Conference and Exhibition
944 - 946
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