Simulation and optimization of batch autohydrolysis of wheat straw to monosaccharides and oligosaccharides

Abstract

Twenty-four non-isothermal wheat straw autohydrolysis experiments were performed in a batch reactor in order to support the development of a new kinetic model. An optimum of 76% w/w total xylose was obtained due to 5% w/w xylose degradation at 180°C for 70min. An optimum of 31% w/w total glucose was obtained due to 22% w/w glucose degradation at 240°C for 82min. The autohydrolysis of cellulose and hemicelluloses was simulated using a new kinetic model, in which a new phenomenological first-order reaction was introduced to take into account the increasing concentration of acids that are produced during the complex cascade of reactions. The new model simulated experimental results more accurately than the severity factor (R0) model.