Catalytic Oxidation of Cyanogen Chloride over a Monolithic Oxidation Catalyst.
Abstract
The catalytic oxidation of cyanogen chloride was evaluated over a monolithic oxidation catalyst at temperatures between 200 and 300 deg C in air employing feed concentrations between 100 and 10,000 ppm (274 and 27,400 mg/cu m). Water was found to have an effect on the performance of the catalyst. In the absence of water, the catalytic activity was very low. Increasing the concentration of water to slightly > 0.25%, significantly increased the catalytic activity. Isothermal reaction rate data were measured by exposing the catalyst to various concentrations of cyanogen chloride and recording the conversion of cyanogen chloride as a function of residence time. Reaction rate data were correlated using a mathematical model, which took into account external mass transfer resistances and kinetic effects, and included terms to account for inhibition due to adsorption of reactant and product HCl onto adsorption sites. In humid air, no deactivation of the catalyst was observed. In dry air, the catalyst rapidly deactivated. However, the initial activity could be restored upon adding water to the feed stream. Reaction products for the oxidation of cyanogen chloride in humid air consisted of CO2, HCl, N2, N2O, and NOx, with the NOx selectivity being greatest at high reaction temperature.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1997
- Accession Number
- ADA326101
Entities
People
- Jeffrey M. Campbell
- Joseph A. Rossin