Abstract: The kinetics of oxidative clehydrogenation of butene-1 to butadiene over Fe4.9 Zn_0.9 Mg_0.9 (atomic ratio) catalyst has been investigated in a flow-reeirculation glass reactor. The Kinetics of oxidative dehydrogcnation of butene-1 to butadiene and deep oxidation of butene-1 and butadiene to CO₂ is described by the equations of Longmuir Hinshelwood mechanism of strong adsorption of bimolecular reaction. The kinetic parameters of rate equations were estimated by non-linear least square.The rate equation for formation of butadiene is