The oxidation of 2-butanone was studied over V2O5 and V2O5 modified by Cs and K at 250 °C with various partial pressures of water in the feed. Acetic acid and acetaldehyde were the most abundant products. Other major products were 2, 3-butanedione and carbon oxides. The addition of water to the feed increased the activities of the catalysts as well as the selectivities to acetic acid, acetaldehyde, and 2, 3-butanedione. Modification of V2O5 with alkali metal ions increased the activity. The increase in activity due to water and alkali metal ion modification correlated well with the decrease in weight loss in thermogravimetric analysis (TGA) measurements in oxygen and with the surface carbon/vanadium ratios as determined by X-ray photoelectron spectroscopy (XPS). Thxis the main effect of water and alkali metal ion modification was to reduce the formation of carbonaceous deposits on the catalysts.
ASJC Scopus subject areas
- Chemical Engineering(all)
- Industrial and Manufacturing Engineering