Abstract
We investigated the effect of La addition on thermal stability and benzene removal activity of iron oxide/alumina composite powder catalyst. La addition to alumina support improved the surface area stability and the total catalytic removal conversion of benzene after heat treatment. The solid state reaction in La-added catalyst was complicated: γ-Al2O3, LaFeAl11O19, LaAlO3 and α-Al2O3 appeared in this system. It was found that Fe/La/Al2O3 with high surface area was better catalyst for benzene removal at moderate temperature even when heated at 1000-1100°C. Also we discussed that La modification increased surface active sites as well as oxygen storage capacity.
