The Effect of CuO/CeO2 Preparation Methods on the HCN Catalytic Removal Efficiency

Abstract

In this paper, the porous CeO₂ flowerlike spheres support and a series of CuO/CeO₂ prepared by different methods were synthesized. The SEM, XRD, BET, H2-TPR and FT-IR characterization were conducted to probe the physicochemical properties of the samples. To evaluate the HCN catalytic removal efficiency over the prepared samples, the breakthrough time of HCN over different samples were investigated. The results implied the CuO/CeO₂ prepared by precipitation method (donated as Ce-5) showed highest catalytic activity, the breakthrough time of which was more than 70 min at 30 °C. It was proved the dispersion of CuO phase on the support, the redox properties and the interaction between CuO and CeO₂ support over CuO/CeO₂ played an important role in the HCN catalytic removal process. FT-IR analysis demonstrated the CuCN was generated due to the chemisorption of CuO and HCN.