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.
|Tila||Julkaistu - 2012|
|Tapahtuma||4th Nordic Wood Biorefinery Conference, NWBC 2012 - Helsinki, Finland|
Kesto: 23 lokak. 2012 → 25 lokak. 2012
|Konferenssi||4th Nordic Wood Biorefinery Conference, NWBC 2012|
|Ajanjakso||23/10/12 → 25/10/12|