Oxygen consumption rate model in HCl oxidation over a supported CuO‐CeO₂ composite oxide catalyst under lean oxygen condition

Abstract

Lean‐oxygen oxidation of HCl, in which O2 conversion can reach as high as ∼60 to ∼90 %, can greatly simplify the process of recycling Cl2 using gas‐phase catalysis technology. The O2 consumption rate in lean‐oxygen HCl oxidation over a supported CuO‐CeO2 composite oxide catalyst was studied using an integral tube reactor. After eliminating the diffusion effects, three empirical kinetic models were proposed, which assumed O2 adsorption, surface reaction, and Cl2 desorption as the rate‐controlling steps, respectively. Based on O2 adsorption as the rate‐controlling step, the results indicate that the kinetic Model I best describes the coincidence between the predicted results and the experimental data. The results laid an essential foundation for reactor simulation, scale‐up, and optimization of the industrial process.

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