Selective hemicellulose hydrolysis of Scots pine sawdust
Rusanen, A., Lappalainen, K., Kärkkäinen, J., Tuuttila, T., Mikola, M., & Lassi, U. (2019). Selective hemicellulose hydrolysis of Scots pine sawdust. Biomass Conversion and Biorefinery, 9(2), 283-291. https://doi.org/10.1007/s13399-018-0357-z
Published inBiomass Conversion and Biorefinery
© The Authors, 2018.
The depletion of fossil resources is driving forward the search for new and alternative renewable feedstocks in the production of renewable chemicals, which could replace the petroleum-based ones. One such feedstock is pine (Pinus sylvestris) sawdust, which is generated enormous amounts in Finnish sawmills yearly. However, prior to the utilization in high-value applications, it needs to be fractionated into its constituents. In this work, the objective was to produce monomeric hemicellulose sugars from pine sawdust without degrading cellulose or lignin simultaneously. The influence of the reaction temperature and time, as well as acid type and concentration, was studied. Based on the results, the temperature was the main distinguishing feature between cellulose and hemicellulose hydrolysis. Promising results were achieved with acid mixtures consisting of 0.5% sulfuric acid and 5.5 or 10% formic acid. At 120 °C with the reaction time of 2 h, the mixtures produced hemicellulose sugars with the yields of 62%. These yields were comparable to the yields achieved in similar conditions with 1.5% sulfuric acid or 40% formic acid. Therefore, by using an acid mixture, the concentration of a single acid could be reduced significantly. The solid fractions remaining after the hydrolysis consisted mainly of cellulose and lignin, which verified the selectivity of the hemicellulose hydrolysis. Also, the fractionation of the remaining solids confirmed that the utilization of all the sawdust components is feasible. ...
Publication in research information system
MetadataShow full item record
Showing items with similar title or keywords.
Acid-catalyzed mechanocatalytic pretreatment to improve sugar release from birch sawdust : Structural and chemical aspects Lempiäinen, Henna; Lappalainen, Katja; Mikola, Marja; Tuuttila, Tero; Hu, Tao; Lassi, Ulla (Elsevier BV, 2021)This study examined acid-catalyzed mechanocatalytic pretreatment of birch sawdust without a separate impregnation step. Catalyst amount and pretreatment time were the key variables. Pretreated material was mixed with water ...
Prieß, Marten; Göddeke, Hendrik; Groenhof, Gerrit; Schäfer, Lars V. (American Chemical Society, 2018)Hydrolysis of nucleoside triphosphate (NTP) plays a key role for the function of many biomolecular systems. However, the chemistry of the catalytic reaction in terms of an atomic-level understanding of the structural, ...
Dissolution and hydrolysis of fibre sludge using hydroxyalkylimidazolium hydrogensulphate ionic liquids Dong, Yue; Holm, Jana; Kärkkäinen, Johanna; Nowicki, Janusz; Lassi, Ulla (Pergamon, 2014)The dissolution and hydrolysis of wet fibre sludge in ionic liquids (ILs) with different reaction conditions are performed in this study. Novel types of hydroxyalkylimidazolium hydrogensulphate ILs, [glymim]HSO4, [hemim]HSO4 ...
Methods to enhance hydrolysis during one and two-stage anaerobic digestion of energy crops and crop residues Jagadabhi, Padma Shanthi (University of Jyväskylä, 2011)
Lempiäinen, Henna; Lappalainen, Katja; Haverinen, Jasmiina; Tuuttila, Tero; Hu, Tao; Jaakkola, Mari; Lassi, Ulla (MDPI, 2020)In this study, the effect of a mechanocatalytic pretreatment on the structure of willow and sugar release from pretreated willow was explored. In the mechanocatalytic approach, the pretreatment consists of solvent-free ...