Abstract：Kinetic model of dilute acid hydrolysis was established with corn cob as substrate in a batch reactor under the operating conditions of, mass fraction of sulfuric acid of 0.1%-0.9%, solid to liquid ratio of 0.1 g/mL, and reaction temperature of 130-170 ℃. The nonlinear data regression method was used for the parameter fitting. The results showed that the pentose yield and hexose retain rate were favored at low reaction temperature and low acid concentration. Under the reaction temperature of 130 ℃, mass fraction of H2SO4 concentration 0.1 %, and reaction time 82 min, the pentose concentration was 36.2 g/L, the pentose yield reached 90.7%, the pentosan hydrolysis rate of corn cob was 97.6%, and the hexose retain rate was 96.9%.
