The oxidation of HCN and reactions with nitric oxide: Experimental and detailed kinetic modeling

The oxidation of HCN has been conducted in a fused silica jet-stirred react or (JSR) at atmospheric pressure and from 1000 to 1400 K. The reduction of nitric oxide (NO) by HCN has also been studied in a JSR in the same operati ng conditions. A detailed chemical kinetic model for NO-reburning (751 reac tions and 102 species) was used to simulate the present experiments. An ove rall good agreement between the experimental results and the modeling was o btained. According to the proposed kinetic mechanism, in the conditions of this study, the oxidation of HCN proceeds mostly through the following sequ ence: HCN + O --> NCO --> NO --> N2O --> N-2. The present modeling also sho ws that the reduction of NO by HCN proceeds according to the following sequ ence of reactions HCN + O --> NCO; NCO + NO --> N2O + CO and CO2 + NO; N2O + H --> N-2 + OH.