“…The composition of hemicellulose varies greatly among different biomasses: the hemicellulose of herbaceous plants mainly contains xylan, while the hemicellulose of woody plants mainly contains mannan, glucan and galactan (Feng et al, 2018). Xylan has successfully been used as a model material to study the liquefaction of hemicellulose in the presence of water or organic solvents (Wang et al, 2016). In hydrothermal liquefaction, xylan could be converted into solubilized monosaccharides such as xylose, which can also be upgraded to liquid fuels, platform compounds and valuable chemicals such as furfural, D-xylulose, glyceraldehyde, lactic acid, etc.…”