| 초록 |
The kinetics of cellulose hydrolysis under dilute acid (1.0, 2.0, and 3.0 wt.%), including extremely low acid (ELA) conditions (0.07 wt.%) and at temperature range of 180-220oC were investigated using batch reactors and bed-shrinking flow-through (BSFT) reactors. The maximum yield of glucose obtained from batch reactor experiments is about 30% of sugarcane bagasee which occurred at 200, and 210 oC. The maximum glucose yields from pre-treated bagasse feedstocks from BSFT reaction were increasing to 55 %. With sugarcane bagasse feedstocks, a large amount of glucose is unaccounted for at the latter phase of the batch reactions. For the improving BSFT reactor performance, two-stage BSFT reaction was applied using hydrogen peroxide. It appears that a half amount of K. lignin was released from the first-stage reaction and the maximum glucose yield increased through the second-stage BSFT reaction. The maximum yield of glucan hydrolysis using two-stage BSFT reaction under ELA condition at high reaction temperature is relatively higher than that of batch and BSFT reaction. In experiments using two-stage BSFT reactors, the glucose yield of 63% is obtained for sugarcane bagasse feedstocks at respective temperatures of 210, and 220oC under ELA condition. |
