Moreover, the strong acidity of catalysts and good dispersion of iron oxide were also beneficial to oxidation reaction. Among them,7%Fe/Al-lap catalysts present the best catalytic activity and high stability at 180. In addition, excessive amount oxygen was not needed in the selective oxidation. Finally, the catalytic and deactivation meachanisms of the catalysts were studied, the catalytic mechanism obeyed redox mechanism. And the catalyst deactivation was mainly due to the sulfur condensation and formation of Fe2(SO4)3 species.