氧化铈高温分解CO_(2)过程表面反应动力学研究

STUDY ON SURFACE REACTION KINETICS OF CERIUM OXIDE DECOMPOSITION OF CO_(2) AT HIGH TEMPERATURE

利用片状氧化铈材料对于氧化铈高温分解CO_(2)过程的反应动力学过程进行实验研究。将实验结果与不同气固模型比较,得出均相F1.5模型是能描述CO_(2)在高温下被氧化铈分解的最佳模型。并利用Hancock and Sharp无模型方法进行模型选择验证,最终得到该反应过程的反应动力学表达式和常数,为该材料在太阳能热化学循环的利用提供了指导。

In this paper,an experimental study on the reaction kinetics of the CO_(2) splitting by ceria was operated using sheet-ceria materials.Comparing the experimental results with different gas-solid models,the homogeneous F1.5 model was selected as the best model that could describe the CO_(2) splitting by ceria at high temperature.The model selection method was validated using the Hancock and Sharp model-free method,and finally the reaction kinetic constants of the reaction process were obtained,providing guidance for the utilization of ceria in the solar thermochemical cycle.