Kinetics study on the low temperature water gas shift reaction over monolithic Re/Pt/Ce0.8Zr0.2O2/cordierite catalyst

The kinetics of the water gas shift (WGS) reaction has been studied over a large range of operation conditions in a differential reactor on the monolithic Re/Pt/Ce0.8Zr0.2O2/cordierite catalyst，which is very active and stable for low-temperature WGS reaction. The experiments were designed by means of orthogonal design, and the model parameters in kinetic equation were estimated using least square nonlinear regression analysis. Correlation coefficient examination and Fexamination show that the kinetics equation established is statistically indistinguishable, and the calculated data agrees well with the kinetics data. WGS reaction orders for CO, H2O, H2 and CO2 are 0.09， 0.88， -0.54 and -0.11, respectively, which are significantly different from those over the traditional Cubased catalysts. It suggests that lowtemperature WGS reaction may occur through different mechanisms over two catalysts.