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Structural changes in spruce wood during different steps of steam explosion pretreatment

Muhammad Muzamal (Institutionen för kemi och kemiteknik, Kemisk apparatteknik) ; Kerstin Jedvert (Institutionen för kemi och kemiteknik, Skogsindustriell kemiteknik) ; Hans Theliander (Institutionen för kemi och kemiteknik, Skogsindustriell kemiteknik) ; Anders Rasmuson (Institutionen för kemi och kemiteknik, Kemisk apparatteknik)
Holzforschung (0018-3830). Vol. 69 (2015), 1, p. 61-66.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: biorefinery, ESEM, intrusion mercury porosimetry, Norway spruce, steam explosion

Denna post skapades 2015-01-22. Senast ändrad 2016-08-19.
CPL Pubid: 211395


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