화학공학소재연구정보센터
Chemical Engineering & Technology, Vol.42, No.1, 232-240, 2019
Kinetic Model of Two-Phase Epoxidation with Ionic Liquids as Micellar Catalysts
The biphasic catalytic epoxidation of cyclooctene using the ionic liquid (IL) 1,2-dimethyl-3-octyl-imidazolium perrhenate ([OMMIM]ReO4) as micellar catalyst and H2O2 as oxidant was investigated. Kinetic experiments were carried out in the intrinsic kinetic regime as proved by variation of stirring rate and temperature. Variation of catalyst concentration allowed for determination of the critical micellar concentration (CMC) of the catalytic IL. The effect of substrate concentrations on the reaction rate was also assessed. Based on the experiments, a kinetic model adapted from enzyme catalysis was proposed to account for the micellar reaction environment. The model takes into account the onset of micelle formation at the CMC. The application of the kinetic model illustrated the good agreement with the experimental data. The model will be applied to other micellar epoxidation reactions and for the design of an appropriate reaction setup in the future.