Activity decay of potassium-promoted iron oxide catalyst for dehydrogenation of ethylbenzene

摘要: Abstract The decay of activity a commercial potassium-promoted iron oxide catalyst for ethylbenzene dehydrogenation was examined continuously over period about 1000 h at 630, 640 and 650°C in the presence steam using differential reactor. Initially, decreased slowly deactivation rate gradually increased. On basis information obtained from physico-chemical analysis used samples, it is speculated that gradual loss migration potassium promoter surface pellet major cause catalytic activity. A kinetic model presented which based on decrease with process time. This fair agreement experimental data relating to deactivation.