Application of Isotopic Transient Kinetics to Vinyl Acetate Catalysis

摘要: The isotopic transient kinetics technique has been used to characterise the surface species of Pd/Cd/silica and Pd/Au/silica catalysts for vinyl acetate synthesis. main feature both types catalyst is a substantial film acetic acid water equivalent between two three molecular layers. Additional temperatureprogrammed desorption experiments have shown that amount retained increased by presence palladium potassium promoter. No reversibly chemisorbed ethylene or oxygen was detected. major by-product, CO2, derived equally from under these conditions. Analysis transients product allowed an estimate active site densities be calculated. also contain information about diffusivity.