Simulation and Optimization in the Process of Toluene Liquid-phase Catalytic Oxidation
ZHANG Yukun , LI Chufu , HE Xiaorong and CHEN Bingzhen Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
Liquid-phase oxidation of toluene with air has become the main technology for producing benzoic acid in a reactor at present. Based on the kinetic model of the toluene oxidation process obtained from laboratory and mass balance of key component, a novel model is established to simulate the industrial toluene oxidation process, in which the effects of benzaldehyde and benzyl alcohol are considered and the kinetic parameters are revised by in-dustrial data. The simulation results show that the error of benzoic acid yield is within 3.5%. Based on the simula-tion model, to maximize the benzoic acid yield, an optimization model is proposed to optimize the operating pa-rameters, including toluene feed-in mass flux and temperature. The optimization result indicates that on the allow-able operating conditions, the maximum benzoic acid yield obtained with the reaction temperature at 167.2°C and the mass flux at 104.1 t·h-1 is greater than the current one, which can be used to guide industrial reactor’s operation.
【CateGory Index】： TQ032