Characteristics of biochar
Hydrothermal treatment of biomass leads to the formation of solid char particles, potentially a coal-like
fuel. In this work, about 45% of original raw bamboo mass was recovered as HTC char. Images of raw
bamboo and HTC char are shown in Figure 3. The surface property is important for char activity. From
the SEM results, it was observed that the HTC char had rougher surface than the raw bamboo. Porous
structures were formed on the surface. The HTC char was observed to contain more porous structure than
the original bamboo samples.
Analysis of biochar energetic content showed an average heating value of 28.7 MJ/kg, which is similar to
that of lignite coal. With respect to energy conversion efficiency, defined as a ratio between energy
content in the biochar divided by that in the raw bamboo, it was calculated to be 76.9%. Further analysis
for carbon in all HTC products should be carried out to evaluate carbon conversion efficiency of the
process.
Characteristics of biocharHydrothermal treatment of biomass leads to the formation of solid char particles, potentially a coal-likefuel. In this work, about 45% of original raw bamboo mass was recovered as HTC char. Images of rawbamboo and HTC char are shown in Figure 3. The surface property is important for char activity. Fromthe SEM results, it was observed that the HTC char had rougher surface than the raw bamboo. Porousstructures were formed on the surface. The HTC char was observed to contain more porous structure thanthe original bamboo samples.Analysis of biochar energetic content showed an average heating value of 28.7 MJ/kg, which is similar tothat of lignite coal. With respect to energy conversion efficiency, defined as a ratio between energycontent in the biochar divided by that in the raw bamboo, it was calculated to be 76.9%. Further analysisfor carbon in all HTC products should be carried out to evaluate carbon conversion efficiency of theprocess.
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