(564a) Hydrolysis of Ddg
AIChE Annual Meeting
2015 AIChE Annual Meeting Proceedings
2015 International Congress on Energy
USA-China Progress in Biomass Conversion Technologies II
Wednesday, November 11, 2015 - 12:30pm to 12:50pm
Liquid hot water (LHW) extraction was used as a pretreatment method to separate the hemicellulose fraction from dried distiller’s grain with solubles (DDGS) into liquid phase. Acid hydrolysis using 3.264% w/w sulfuric acid at 130 ̊C was performed to convert polysaccharides in LHW extract to monosaccharides. The structure characterization of DDGS in anomeric carbon region based on proton NMR and heteronuclear single quantum coherence (HSQC) during acid hydrolysis was studied in this work. It reveals that the sugar units in DDGS hemicelluloses are constructed with (1-4)-β-D-xylopyranose and α-L-arabinofuranosyl residues. A kinetic model is included to explain the changing concentration of monomer, oligomer and sugar units. The model was further tested based on the changing concentration of five carbon sugar units during hydrolysis.