Effective saccharification of lignocellulosic barley straw by mechanocatalytical pretreatment using potassium pyrosulfate as a catalyst.
The catalytic conversion of lignocellulosic biomass is attractive due to the feasible generation of valuable products such as reducing sugars which constitute the basic substrates for chemical and transportation fuel production, as well as the production of renewable hydrogen. This study shows the efficient conversion of lignocellulose, especially hemicellulose, into reducing sugars such as xylose and galactose, by mechanocatalysis using potassium pyrosulfate, K2S2O7, as an effective salt catalyst. Ball milling was performed, introducing a mechanical force which, combined with chemical pretreatment, leads to reducing sugar yields (40%) almost as high as when commonly used sulfuric acid was employed. Kinetic experiments as well as the optimization of the saccharification process are presented.
University of Oulu, Research Unit of Sustainable Chemistry, P.O. Box 3000, FIN-90014 Oulu, Finland; University of Jyvaskyla, Kokkola University Consortium Chydenius, FI-67100 Kokkola, Finland.
Laura
L
Schneider
University of Oulu, Kajaani University Consortium, CEMIS-Oulu, FI-87400 Kajaani, Finland.
Jasmiina
J
Haverinen
University of Oulu, Kajaani University Consortium, CEMIS-Oulu, FI-87400 Kajaani, Finland.
Mari
M
Jaakkola
University of Oulu, Research Unit of Sustainable Chemistry, P.O. Box 3000, FIN-90014 Oulu, Finland; University of Jyvaskyla, Kokkola University Consortium Chydenius, FI-67100 Kokkola, Finland. Electronic address: ulla.lassi@oulu.fi.
Ulla
U
Lassi
D018533:Biomass; D002241:Carbohydrates / Q000096:biosynthesis; D001467:Hordeum; D006868:Hydrolysis; D011188:Potassium; D014994:Xylose
D002241:Carbohydrates; D014994:Xylose; D011188:Potassium
Ball milling; Barley straw (Hordeum vulgare); Lignocellulose; Mechanocatalytical conversion; Potassium pyrosulfate