Structural changes in spruce wood during different steps of steam explosion pretreatment
Artikel i vetenskaplig tidskrift, 2015

Steam explosion (SE) is a promising hydrothermal pretreatment technology for future biorefineries. In this study, the three steps of the steam explosion process, (1) the steam treatment (2) the explosion, and (3) the impact step were separately considered and their effects on structural changes of wood were studied. The SE experiments were performed on single wood pieces in different experimental set-ups at 7 and 14 bar pressure with 5 and 10 min treatment times. Mercury porosimetry and environmental scanning electron microscopy analyses were conducted to characterise both internal and external changes in the wood. It was found that the explosion step is not responsible for the disintegration of the wood material into small pieces; instead, the disintegration occurs due to impact of softened wood chips. However, the porosity profiles of the tracheids change during the explosion step. Altogether, all three steps of the SE process contribute in a synergistic way to an increase in pore size and total intrusion volume.

ESEM

Norway spruce

steam explosion

intrusion mercury porosimetry

biorefinery

Författare

Muhammad Muzamal

Chalmers, Kemi och kemiteknik, Kemiteknik, Kemisk miljövetenskap

Kerstin Jedvert

Chalmers, Kemi och kemiteknik, Kemiteknik, Skogsindustriell kemiteknik

Hans Theliander

Chalmers, Kemi och kemiteknik, Kemiteknik, Skogsindustriell kemiteknik

Wallenberg Wood Science Center (WWSC)

Anders Rasmuson

Wallenberg Wood Science Center (WWSC)

Chalmers, Kemi och kemiteknik, Kemiteknik, Kemisk miljövetenskap

Holzforschung

0018-3830 (ISSN) 1437-434X (eISSN)

Vol. 69 61-66

Ämneskategorier

Materialteknik

DOI

10.1515/hf-2013-0234