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Hydrothermal pretreatment of wood by mild steam explosion and hot water extraction

J. Wojtasz-Mucha ; Merima Hasani (Institutionen för kemi och kemiteknik, Skogsindustriell kemiteknik) ; Hans Theliander (Institutionen för kemi och kemiteknik, Skogsindustriell kemiteknik)
Bioresource Technology (0960-8524). Vol. 241 (2017), p. 120-126.
[Artikel, refereegranskad vetenskaplig]

The aim of this work was to compare the two most common hydrothermal pre-treatments for wood mild steam explosion and hot water extraction - both with the prospect of enabling extraction of hemicelluloses and facilitating further processing. Although both involve autohydrolysis of the lignocellulosic tissue, they are performed under different conditions: the most prominent difference is the rapid, disintegrating, discharge employed in the steam explosion opening up the structure. In this comparative study, the emphasis was placed on local composition of the pre-treated wood chips (of industrially relevant size). The results show that short hot water extraction treatments lead to significant variations in the local composition within the wood chips, while steam explosion accomplishes a comparably more even removal of hemicelluloses due to the advective mass transport during the explosion step.

Nyckelord: Pre-treatment, Steam explosion, Hot water extraction, Autohydrolysis, Local properties



Denna post skapades 2017-08-15.
CPL Pubid: 251134

 

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Institutioner (Chalmers)

Institutionen för kemi och kemiteknik, Skogsindustriell kemiteknik

Ämnesområden

Biologiska vetenskaper

Chalmers infrastruktur