The aqueous extraction of hemicelluloses has gained an increasing interest with new emerging applications for hemicelluloses in the modern forest-based biorefinery concept. The extraction kinetics play a key role in their industrial utilisation. Pressurised hot water extraction of spruce sap wood was investigated in the temperature range 120–170°C using a large liquid-to-solid ratio in an intensified cascade reactor system. The results show significant temperature dependence of the extraction rate, albeit low influence of pH. Moreover, a clear dependence of the hydrolysis rate on the temperature and pH was observed. The molecular mass of the extracted hemicelluloses was influenced by the chip size. A kinetic model was developed for describing the extraction kinetics.
|Number of pages||2|
|Publication status||Published - 2012|
|MoE publication type||O2 Other|
|Event||4th Nordic Wood Biorefinery Conference, NWBC 2012 - Helsinki, Finland|
Duration: 23 Oct 2012 → 25 Oct 2012
|Conference||4th Nordic Wood Biorefinery Conference, NWBC 2012|
|Period||23/10/12 → 25/10/12|