TY - JOUR
T1 - Fractionation of barley straw with dilute sulfuric acid for improving hemicellulose recovery
AU - Won, Kyung Yoen
AU - Um, Byung Hwan
AU - Kim, Seung Wook
AU - Oh, Kyeong Keun
N1 - Funding Information:
This study was supported by the Technology Development Program (# 309016-5) for the Agriculture and Forestry units of the Ministry of Food, Agriculture, Forestry, and Fisheries of Korea.
PY - 2012/5
Y1 - 2012/5
N2 - Dilute acid fractionation of barley straw improves dissolving hemicellulose fraction of the straw, while leaving the cellulose more reactive and accessible to enzyme as a strategy of pretreatment. To characterize the fractionation process, the effects of the acid concentration, temperature and reaction time on the hemicellulose removal as well as on the formation of by-products (furfural, 5-hydroxymethylfurfural and acetic acid) were investigated. The optimum fractionation conditions of barley straw were 1% (w/v) concentration of sulfuric acid, 158 °C of reaction temperature and 15 min of reaction time. Under the optimum conditions, 87% of xylan was hydrolyzed and recovered in liquid hydrolyzate, which was 7% higher than that of the predicted yield. The hydrolyzate contained glucose 2.44 g/L, arabinose 1.70 g/L, xylose 13.41 g/L, acetic acid 1.55 g/L, levulinic acid 0.03 g/L, 5-HMF 0.03 g/L and furfural 0.75 g/L.
AB - Dilute acid fractionation of barley straw improves dissolving hemicellulose fraction of the straw, while leaving the cellulose more reactive and accessible to enzyme as a strategy of pretreatment. To characterize the fractionation process, the effects of the acid concentration, temperature and reaction time on the hemicellulose removal as well as on the formation of by-products (furfural, 5-hydroxymethylfurfural and acetic acid) were investigated. The optimum fractionation conditions of barley straw were 1% (w/v) concentration of sulfuric acid, 158 °C of reaction temperature and 15 min of reaction time. Under the optimum conditions, 87% of xylan was hydrolyzed and recovered in liquid hydrolyzate, which was 7% higher than that of the predicted yield. The hydrolyzate contained glucose 2.44 g/L, arabinose 1.70 g/L, xylose 13.41 g/L, acetic acid 1.55 g/L, levulinic acid 0.03 g/L, 5-HMF 0.03 g/L and furfural 0.75 g/L.
KW - Barley Straw
KW - Hemicellulose
KW - Pretreatment
KW - Response Surface Methodology (RSM)
KW - Sugar Decompositions
UR - http://www.scopus.com/inward/record.url?scp=84862796984&partnerID=8YFLogxK
U2 - 10.1007/s11814-011-0218-y
DO - 10.1007/s11814-011-0218-y
M3 - Article
AN - SCOPUS:84862796984
VL - 29
SP - 614
EP - 620
JO - Korean Journal of Chemical Engineering
JF - Korean Journal of Chemical Engineering
SN - 0256-1115
IS - 5
ER -