The kinetics of simultaneous aqueous extraction and hydrolysis of spruce hemicelluloses

Jussi Rissanen, Henrik Grénman*, Chunlin Xu, Jens Krogell, Stefan Willför, Dmitry Murzin, Tapio Salmi

*Korresponderande författare för detta arbete

Forskningsoutput: KonferensbidragArbetsdokumentPeer review

Sammanfattning

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.

OriginalspråkEngelska
Sidor416-417
Antal sidor2
StatusPublicerad - 2012
MoE-publikationstypO2 Other
Evenemang4th Nordic Wood Biorefinery Conference, NWBC 2012 - Helsinki, Finland
Varaktighet: 23 okt 201225 okt 2012

Konferens

Konferens4th Nordic Wood Biorefinery Conference, NWBC 2012
Land/TerritoriumFinland
OrtHelsinki
Period23/10/1225/10/12

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