Dissolution of wood components during hot water extraction of spruce
Artikel i övrig tidskrift, 2023

The purpose of this study was to investigate the autohydrolysis of softwood, which is the main chemical operation in both hot water extraction and steam explosion. Control of the process and monitoring its course were ensured by the careful choice of experimental setup and conditions: a milled spruce material was extracted in a small flow-through reactor to minimize degradation of the dissolved material and to enable analysis of the resulting liquors extracted at selected time points. The obtained liquid and solid fractions were analyzed for sugar composition and acetic acid concentration. The results showed that partially degraded hemicelluloses were extracted; hemicelluloses side chains were cleaved off and detected as monomers, while deacetylation was limited. Chain scissions of cellulose were observed as a result of autohydrolysis.

Extraction

Flow through reactors

Hot water extraction

Hydrolysis

Acetylation

Water

Dissolved materials

Författare

Joanna Wojtasz-Mucha

Chalmers, Kemi och kemiteknik, Kemiteknik

Merima Hasani

Chalmers, Kemi och kemiteknik, Kemiteknik

Hans Theliander

Chalmers, Kemi och kemiteknik, Kemiteknik

Tappi Journal

0734-1415 (ISSN)

Vol. 22 5 329-343

Ämneskategorier

Kemiska processer

Polymerteknologi

DOI

10.32964/tj22.5.329

Mer information

Senast uppdaterat

2023-07-04