Oxiciatsve Propane Dehydrogenatioo so a Micro-channel Reactor Kinetic Data Acquisition and Modelling

摘要

The potential of a micro-structured channel reactor as compared to a lab-scale fixed-bed reactor was studied for a highly exothermic oxidation reaction, i.e. the oxidative dehydrogenation of propane over a VOx/Al2O3 catalyst. The temperature was varied between 696 and 823 K. The initial partial pressures of O2 and C3Hg were varied from 15 kPa to 25 kPa and 15 kPa to 50 kPa. Based on the kinetic data obtained in the micro-structured reactor, a kinetic model was derived. The resulting kinetic reaction scheme and the kinetic parameters describe the change of all reaction components adequately in the range of experimental conditions, Finally, the derived kinetic model was validated by comparing experimental results obtained in the lab-scale fixed-bed reactor with simulated results. For isothermal conditions, agreement between experimental and simulated results was obtained. At non-isothermal operation some differences were obtained between the experiments and simulations, which may be due to an increasing importance of homogeneous reactions at high temperatures.