Reaction Kinetics of HCl Catalytic Oxidation over a Supported Cu-Based Composite Industrial Catalyst

The chlorine from HCl can be recycled by catalytic oxidation during the industrial process, but excessive heat will be produced during the HCl catalytic oxidation, which leads to catalyst deactivation. Thus, a study of the reaction kinetics of HCl catalytic oxidation over a Cu-based composite catalyst is necessary. The influence of Tvalues of 360–400 °C, nHCl/nO2values of 1–4, and FHCl0/Wvalues of 0.01–60 h–1on HCl conversion and reaction rate was studied, and a kinetic model was established by a MATLAB parameter fit and a statistical test. Results show that, before chemical equilibrium, HCl conversion and reaction rate increase with an increase in Tor a decrease in nHCl/nO2. With a decrease in FHCl0/W, HCl conversion increases while the HCl reaction rate decreases. After chemical equilibrium, HCl conversion decreases with an increase in Tand nHCl/nO2or a decrease in FHCl0/W. The kinetic model that assumes O2adsorption is the rate-controlling step can suitably describe the reaction behavior of HCl catalytic oxidation over a Cu-based composite catalyst.