6533b7d2fe1ef96bd125f578
RESEARCH PRODUCT
The Effect of Mechanocatalytic Pretreatment on the Structure and Depolymerization of Willow
Jasmiina HaverinenKatja LappalainenHenna LempiäinenTero TuuttilaUlla LassiMari JaakkolaTao Husubject
rikkihappo020209 energyselluloosaWillow sawdustpajut02 engineering and technology010501 environmental sciencesXyloseesikäsittelylcsh:Chemical technologycomplex mixtures01 natural sciencesCatalysisHydrolysatepolymerointilcsh:ChemistryBall millingchemistry.chemical_compoundlignocellulose0202 electrical engineering electronic engineering information engineeringmechanocatalytic pretreatmentMonosaccharidelcsh:TP1-1185Physical and Theoretical ChemistrySugarBall mill0105 earth and related environmental scienceschemistry.chemical_classificationDepolymerizationSulfuric acidsulfuric aciddigestive oral and skin physiologytechnology industry and agriculturefood and beveragesSulfuric acidwillow sawdustlcsh:QD1-999chemistryvisual_artvisual_art.visual_art_mediumball millingSawdustLignocelluloseMechanocatalytic pretreatmentNuclear chemistrydescription
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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2020-02-01 | Catalysts |