Multiple Scales Modelling of Chemistry and Mass Transfer in a SCR Process for Plate-Type Monolithic Catalysts

摘要

The modelling method of chemistry and mass transfer process was studied for plate-type SCR catalysts. Single-and multi-channel scale models were established for a monolithic plate-type SCR reactor, and the simulation results were compared with the experiments over a micro-scale reactor to verify the accuracy. It was found that good agreement are achieved between the results of multi-channel model and the experiments, whereas a lower NO_x reduction efficiency and a higher Sherwood number were calculated by single channel model. This illustrates that the symmetric boundary assumptions in single channel model might be not reliable, especially when the flow distribution at the reactor entrance is not uniform. The multi-channel model in consideration of channels interaction is more suitable for engineering applications.