Kinetic studies and optimization of abies wood fractionation by hydrogen peroxide at mild conditions with TiO2 catalyst

Abstract

The kinetic study of abies wood delignification by H2O2 in the medium acetic acid – water was firstly studied in the presence of TiO2 catalyst under mild conditions: temperatures 70 – 100 °C, atmospheric pressure. The oxidative delignification process is described satisfactory by the first order equation in all temperature range. The rate constants are varied between 0.80– 12.3 10-3min-1 and the activation energy is near 81 kJ•mol-1. The optimal parameters of delignification process, providing the effective fractionation of abies wood on microcrystalline cellulose and soluble lignin, were established by experimental and numerical methods.