The effect of cobalt and iron dopants on the catalytic behavior of V/P/O catalysts in the selective oxidation of n-pentane to maleic And phthalic anhydrides

摘要

V/P/O catalysts were prepared using isobutanol as solvent, which contained either cobalt or iron as the dopant (Me/C0.001). The catalysts were characterized with several techniques, both after thermal treatuent and after reaction in n-pentane/air. The cat- Alytic performance was compared for the selective oxidation to maleic and phthalic anhydrides under conditions at which results Were stable (i.e., after at least 200 h time-on-stream). It was found that iron had a dramatic effect on the structural evolution of the Catalyst both during calcination ad during aging; in contrast, the effect of cobalt was much less marked.