Mathematical Modeling of Reverse Water‐Gas Shift Reaction in a Fixed‐Bed Reactor

A two‐dimensional, pseudo‐homogeneous model is used to study the reverse water‐gas shift (RWGS) reaction in a fixed‐bed reactor under steady‐state conditions. A redox kinetic model is applied in the reactor model for a description of the reaction kinetics. Results show that the model predictions have an average error of 2.7 % and are in good agreement with experimental data for nonequilibrium conditions. With increasing space velocity, the CO 2 conversion decreases, but the temperature drop in the reactor increases. Furthermore, a H 2 /CO 2 ratio equal to one in the feed is the optimum ratio. Finally, the temperature, concentration, and pressure profiles inside the reactor are predicted.