A kinetic assessment of glucose production from pretreated Gelidium amansii by dilute acid hydrolysis

In this study, acid hydrolysis of glucan derived from Gelidium amansii was evaluated using kinetic interpretation. The primary goal of this study was to gain a more accurate kinetic data of glucose formation and decomposition from a match between a first-order reaction model and the experimental data at final reaction temperature (190 °C) and sulfuric acid concentration (4.0% w/v) in a bomb tube reactor. Reaction rates for the generation of glucose and decomposed products were strongly dependent on reaction temperature and acid concentration. The maximum yield of glucose of 38.09% was found under the conditions. Activation energy (E1) and the pre-exponential factor (A01) for glucose formation were 51.474 kJ/mol and 5.8981 × 104 min−1 respectively. For glucose decomposition, the activation energy (E2) and the pre-exponential factor (A02) were 69.966 kJ/mol and 1.043 × 107 min−1, respectively.

► Acid hydrolysis of pretreated Gelidium amansii (Red Algae). ► Development simple kinetic model for cellulose degrading and for glucose decomposition. ► Estimating parameters; rate constants, apparent activation energy, and frequency factors etc. ► The model has good agreement with experimental data.