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