| 초록 |
Ethanol organosolv fractionation is effective process for production of high purity lignin from second generation biomass. However, the major bottleneck of organosolv fractionation could not use of pentose because of extraction in hydrolysate during organosolv. Dilute hydrochloric acid fractionation prior to organosolv has been suggested as a strategy to solve this drawback. In this study, kenaf as energy crop was fractionated with 0.1-0.6 %(w/w) HCl (solid to liquid ratio 1:10) at 130-190oC for 60 min. Then, the residual solids were fractionated with 60 %(v/v) ethanol under various conditions (solid to liquid ratio 1:10, 100-160°C, 20-60 min), and the changes on the composition of residual solids, hydrolysate, and lignin purity were investigated. Subsequent each process was scale-up in 7L reactor. By reflecting this strategy, two stage fractionations based on dilute hydrochloric acid and ethanol show outstanding effective to separate the cellulose, hemicellulose, and lignin. |
