Ammoxidation of acrolein on catalyst of Fe–Bi–P mixed oxide system

Abstract

Abstract Ammoxidation of acrolein (Al) on Fe 2 O 3 ‐Bi 2 O 3 ‐P 2 O 5 (44.5:44.5:11.0 mol%) catalyst was studied in a fixed bed reactor. The main products were acrylonitrile (AN), CO 2 and acetonitrile; and CO was negligibly small. The rate equations for Al conversion and product formation, together with their apparent activation energies, were obtained. The reaction rates are controlled by the chemical reaction rates at temperatures below 340°C, while the external film diffusion rates are the rate determining steps at temperatures above 380°C. Assuming the chemical reaction controlling region, the conversion rate of Al at 400°C is about 1000 times faster than that of propylene. From the effects of feed composition on selectivities, it is concluded that AN is produced according to Hadley's path.