Hemicellulose extraction by hot pressurized water pretreatment at 160 ºC for 10 different woods: yield and molecular weight

A1 Journal article (refereed)

Internal Authors/Editors

Publication Details

List of Authors: Gianluca Gallina, Álvaro Cabeza, Henrik Grénman, Pierdomenico Biasi, Juan García-Serna, Tapio Salmi
Publisher: Elsevier B.V.
Publication year: 2018
Journal: Journal of Supercritical Fluids
Journal acronym: J. Supercrit. Fluids
Volume number: 133
Issue number: Part 2
Start page: 716
End page: 725
eISSN: 1872-8162


A study on hemicellulose extraction from 10 different tree species was performed using a batchwise operated cascade reactor constituted by 5 units of 200 mL and a buffer vessel of 2000 mL where a flowrate of 150 L h−1 was fully recirculated (close loop operatioin). The experiments were performed at 160 °C, 9 bar and with wood chips particle size of 1.25–2 mm (average solid load of 6.57 g/L). The aim was to identify which wood species were the best candidates to obtain a high yield and/or molecular weight of hemicelluloses. Hydrothermal extractions at different times (from 5 to 80 min) were investigated. The highest yield was obtained with eucalyptus wood (40.3 wt%) after 80 min of extraction. Furthermore, 3 different trends were obtained for molecular weight evolution, where the different tree species can be grouped.

Last updated on 2019-21-04 at 03:23