Rapid one-step solvent-free acid-catalyzed mechanical depolymerization of pine sawdust to high-yield water-soluble sugars

6533b858fe1ef96bd12b6503

RESEARCH PRODUCT

Rapid one-step solvent-free acid-catalyzed mechanical depolymerization of pine sawdust to high-yield water-soluble sugars

Mari Jaakkola Jasmiina Haverinen Ulla Lassi Ulla Lassi Jean-marc Lévêque Jana Holm Tero Tuuttila Tero Tuuttila Yue Dong Yue Dong

subject

hydrolyysi sokerit mänty biomassa 020209 energy lignin condensation lignin 02 engineering and technology chemistry.chemical_compound Hydrolysis Acid-catalyzed mechanical depolymerization [CHIM.ANAL]Chemical Sciences/Analytical chemistry acid-catalyzed mechanical depolymerization 0202 electrical engineering electronic engineering information engineering Lignin Monosaccharide Organic chemistry chromophores Sugar Waste Management and Disposal ta215 ta218 ComputingMilieux_MISCELLANEOUS chemistry.chemical_classification biomass Renewable Energy Sustainability and the Environment Depolymerization Hydrolysis ligniini Forestry Pinus sylvestris Lignin condensation Chromophores Reducing sugar Solvent sawdust chemistry hydrolysis sugars Yield (chemistry)[SDE]Environmental Sciences Pine (Pinus sylvestris) sawdust Agronomy and Crop Science Nuclear chemistry pine

description

Abstract One-step absolute solvent-free acid-catalyzed mechanical depolymerization of pine sawdust (PSD) and commercially available α-cellulose to water-soluble sugars was carried out using ball milling. For comparison purposes, the commonly reported “solvent-free” mechanocatalytic depolymerization of lignocellulose method, which normally involves three steps (acid impregnation in solvent, vacuum drying, and mechanical depolymerization of lignocellulose), was performed. The 3,5-dinitrosalicylic acid (DNS) method was used to measure the total reducing sugar (TRS) of the obtained sugar solution, and major monosaccharides in the solution were analyzed by capillary electrophoresis (CE). More than 90% of the PSD became water-soluble through milling. Furthermore, most of the PSD was converted into TRS in approximately 30 min, and the highest TRS yield obtained was 31%, based on the dry mass. Interestingly, the TRS solutions obtained from the processed PSD were much darker than those obtained from α-cellulose due to the chromophores that formed during the depolymerization of lignin.

year	journal	country	edition	language
2017-07-01

http://urn.fi/urn:nbn:fi-fe201705156426