Lempiäinen, H.; Lappalainen, K.; Haverinen, J.; Tuuttila, T.; Hu, T.; Jaakkola, M.; Lassi, U. The Effect of Mechanocatalytic Pretreatment on the Structure and Depolymerization of Willow. Catalysts 2020, 10, 255. https://doi.org/10.3390/catal10020255
The effect of mechanocatalytic pretreatment on the structure and depolymerization of willow
|Author:||Lempiäinen, Henna1; Lappalainen, Katja1,2; Haverinen, Jasmiina3;|
1Kokkola University Consortium Chydenius, University of Jyväskylä, Talonpojankatu 2B, 67100 Kokkola, Finland
2Research Unit of Sustainable Chemistry, University of Oulu, P.O. Box 8000, FIN-90014 Oulu, Finland
3Unit of Measurement Technology, Kajaani University Consortium, University of Oulu, P.O. Box 127, FI-87400 Kajaani, Finland
|Online Access:||PDF Full Text (PDF, 16.8 MB)|
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe2020050424762
Multidisciplinary Digital Publishing Institute,
|Publish Date:|| 2020-05-04
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 impregnation with sulfuric acid and a mechanical treatment with ball milling. Willow sawdust and pretreated samples were analyzed with field emission scanning electron microscope and X-ray diffraction. The products in the sugar solution were determined as the total reducing sugars with the 3,5-dinitrosalicylic acid method and monosaccharides with capillary electrophoresis. According to the results, milling increased the sugar production, depending on the sulfuric acid load. The milling parameters, such as the rotation speed of the mill, the catalyst-to-willow ratio, and the milling time influenced the amount of sugars in the hydrolysate and the composition of the sugar solution produced. Changes were observed in the surface of the willow particles as well as changes in the crystalline structure. Glucose and xylose yields increased after 15 min of milling and reached their maximum level after 45 min of milling with the 0.5 mmol/g sulfuric acid load.
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
116 Chemical sciences
This research was supported by the European Regional Development Fund, Leverage from the European Union program 2014-2020 (A71029, Biomass value chains) and the European Regional Development Fund, Interreg Botnia-Atlantica (20200327, Bioraff Botnia).
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