title: Acetic acid-assisted hydrothermal fractionation of empty fruit bunches for high hemicellulosic sugar recovery with low byproducts.
abstract: Xylose, mannose, and galactose (xmg) recovery from empty fruit bunches using acetic acid-assisted hydrothermal (AAH) fractionation method was investigated. Acetic acid has been demonstrated to be effective in xmg recovery in comparison with the liquid hot-water (LHW) fractionation. The maximum xmg recovery yield (50.7 %) from the empty fruit bunch (EFB) was obtained using AAH fractionation at optimum conditions (6.9 wt.% acetic acid at 170 °C and for 18 min); whereas, only 16.2 % of xmg recovery was obtained from the LHW fractionation at the same reaction conditions (170 °C and 18 min). Releasing out the glucose from EFB was kept at low level (<1.0 %) through all tested conditions and consequently negligible 5-HMF and formic acid were analyzed in the hydrolyzate. The production of furfural was also resulted with extremely low level (1.0 g/L).
authors.affiliation: Department of Applied Chemical Engineering, Dankook University, Cheonan, Chungnam, 330-714, South Korea.
authors.forename: Dong Young
authors.initials: DY
authors.lastname: Kim
authors.forename: Byung Hwan
authors.initials: BH
authors.lastname: Um
authors.forename: Kyeong Keun
authors.initials: KK
authors.lastname: Oh
mesh_terms: D019342:Acetic Acid / Q000737:chemistry*; D000704:Analysis of Variance; D002384:Catalysis; D005591:Chemical Fractionation; D005638:Fruit / Q000737:chemistry*; D005662:Furaldehyde / Q000032:analysis; D005690:Galactose / Q000032:analysis; D006868:Hydrolysis; D008358:Mannose / Q000032:analysis; D011134:Polysaccharides / Q000302:isolation & purification*; D013696:Temperature; D014867:Water / Q000737:chemistry*; D014994:Xylose / Q000032:analysis
chemical_list: D011134:Polysaccharides; D014867:Water; C007916:hemicellulose; D014994:Xylose; D005662:Furaldehyde; D008358:Mannose; D019342:Acetic Acid; D005690:Galactose