Coniferous and deciduous wood have certain differences in the
chemical composition and amount of lignocellulosic components
. During hydrothermal carbonization, hemicellulose as the
most reactive wood cell fraction is mainly affected. At the same
time, previous research indicated that in coniferous wood, this
component is mannan-based, while deciduous species are rich with
more reactive xylan-containing fractions. For this reason, the reactivity
of hemicelluloses and decomposition character together with
distribution and characteristics of resulting products noticeably differ between coniferous and deciduous wood. Therefore,
previously published results on the deciduous wood
decomposition during HTC could not be directly applied for coniferous
species. The main objective of this work was to gather more
experimental data on the hydrothermal carbonization of coniferous
wood. Wood chips and hydrochar samples were characterized
by proximate analysis measurements. The influence of process
parameters (temperature, time, and water-to-biomass ratio) on
hydrochar mass and energy yields was evaluated and described
with mathematical correlations