Catalytic Oxidation Removal of HCN in Tail Gas

High activity catalyst for HCN removal were prepared by immobilizing Cu2+on γ-Al2O3. The catalyst showed great activity from 150°C to 250°C. The removal efficiency of HCN were above 98%. Based on the experimental phenomena, it can be assumed that the rate controlling step of the catalytic reaction process was the generation of HNCO by HCN and O2. A prediction model consist of HCN conversion, HCN flow rate, catalyst dosage was derived by combining the Langmuir adsorption isotherm. The experimental data fitted with the prediction model very well and the model may be a worthy reference for the catalytic oxidation process of HCN.